93-710: The Pierre Laporte Bridge (French: Pont Pierre-Laporte) is the longest main span suspension bridge in Canada . It crosses the Saint Lawrence River approximately 200 metres (660 ft) west (upstream) of the Quebec Bridge between Quebec City and Lévis . It spans 1,041 metres (3,415 ft). It was originally named the New Quebec Bridge ( Nouveau pont de Québec ) and was supposed to be called Pont Frontenac (Frontenac Bridge) until it
186-410: A cable-stayed bridge in which the deck is in compression. Cable-stayed bridges and suspension bridges may appear to be similar, but are quite different in principle and in their construction. In suspension bridges, large main cables (normally two) hang between the towers and are anchored at each end to the ground. The main cables, which are free to move on bearings in the towers, bear the load of
279-460: A 200 feet span (also termed Beose Bridge) was constructed near Sagar, India during 1828–1830 by Duncan Presgrave, Mint and Assay Master. The Clifton Suspension Bridge (designed in 1831, completed in 1864 with a 214 m central span), is similar to the Sagar bridge. It is one of the longest of the parabolic arc chain type. The current Marlow suspension bridge was designed by William Tierney Clark and
372-572: A blind eye to his son's lack of capability. Following a revolt during which Amaru almost led the Inca forces to defeat, the Sapa Inca decided to replace the co-ruler with another one of his sons, Topa Inca Yupanqui . Túpac Inca Yupanqui began conquests to the north in 1463 and continued them as Inca ruler after Pachacuti's death in 1471. Túpac Inca's most important conquest was the Kingdom of Chimor ,
465-492: A bridge has a tendency to collapse simply because of the gravitational forces acting on the materials of which the bridge is made. Live load refers to traffic that moves across the bridge as well as normal environmental factors such as changes in temperature, precipitation, and winds. Dynamic load refers to environmental factors that go beyond normal weather conditions, factors such as sudden gusts of wind and earthquakes. All three factors must be taken into consideration when building
558-468: A bridge. Silver Bridge (USA) was an eyebar chain highway bridge, built in 1928, that collapsed in late 1967, killing forty-six people. The bridge had a low-redundancy design that was difficult to inspect. The collapse inspired legislation to ensure that older bridges were regularly inspected and maintained. Following the collapse a bridge of similar design was immediately closed and eventually demolished. A second similarly-designed bridge had been built with
651-788: A bridge. The principles of suspension used on a large scale also appear in contexts less dramatic than road or rail bridges. Light cable suspension may prove less expensive and seem more elegant for a cycle or footbridge than strong girder supports. An example of this is the Nescio Bridge in the Netherlands, and the Roebling designed 1904 Riegelsville suspension pedestrian bridge across the Delaware River in Pennsylvania. The longest pedestrian suspension bridge, which spans
744-451: A child, Sinchi Roca . The people who were already living in Cusco fought hard to keep their land, but Mama Huaca was a good fighter. When the enemy attacked, she threw her bolas (several stones tied together that spun through the air when thrown) at a soldier (gualla) and killed him instantly. The other people became afraid and ran away. After that, Ayar Manco became known as Manco Capac ,
837-403: A higher margin of safety and remained in service until 1991. The Tacoma Narrows Bridge , (USA), 1940, was vulnerable to structural vibration in sustained and moderately strong winds due to its plate-girder deck structure. Wind caused a phenomenon called aeroelastic fluttering that led to its collapse only months after completion. The collapse was captured on film. There were no human deaths in
930-604: A labour obligation of a person to the Empire. The Inca rulers (who theoretically owned all the means of production) reciprocated by granting access to land and goods and providing food and drink in celebratory feasts for their subjects. Many local forms of worship persisted in the empire, most of them concerning local sacred huacas or wak’a , but the Inca leadership encouraged the sun worship of Inti —their sun god—and imposed its sovereignty above other religious groups, such as that of Pachamama . The Incas considered their king,
1023-415: A method of taxation: For as is well known to all, not a single village of the highlands or the plains failed to pay the tribute levied on it by those who were in charge of these matters. There were even provinces where, when the natives alleged that they were unable to pay their tribute, the Inca ordered that each inhabitant should be obliged to turn in every four months a large quill full of live lice, which
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#17327976813201116-585: A pedestrian suspension bridge over the Machchhu River in the city of Morbi, Gujarat, India collapsed, leading to the deaths of at least 141 people. Inca The Inca Empire , officially known as the Realm of the Four Parts ( Quechua : Tawantinsuyu , lit. "land of four parts" ), was the largest empire in pre-Columbian America . The administrative, political, and military center of
1209-647: A proposal by Robert Stevenson for a bridge over the River Almond near Edinburgh . Roebling's Delaware Aqueduct (begun 1847) consists of three sections supported by cables. The timber structure essentially hides the cables; and from a quick view, it is not immediately apparent that it is even a suspension bridge. The main suspension cables in older bridges were often made from a chain or linked bars, but modern bridge cables are made from multiple strands of wire. This not only adds strength but improves reliability (often called redundancy in engineering terms) because
1302-541: A sequence generally described as follows. Depending on length and size, construction may take anywhere between a year and a half (construction on the original Tacoma Narrows Bridge took only 19 months) up to as long as a decade (the Akashi-Kaikyō Bridge's construction began in May 1986 and was opened in May 1998 – a total of twelve years). Suspension bridges are typically ranked by the length of their main span. These are
1395-499: A temporary walkway. Poured sockets are used to make a high strength, permanent cable termination. They are created by inserting the suspender wire rope (at the bridge deck supports) into the narrow end of a conical cavity which is oriented in-line with the intended direction of strain. The individual wires are splayed out inside the cone or 'capel', and the cone is then filled with molten lead-antimony-tin (Pb80Sb15Sn5) solder. Most suspension bridges have open truss structures to support
1488-538: A third point Troll pointed out irrigation technology as advantageous to Inca state-building. While Troll theorized concerning environmental influences on the Inca Empire, he opposed environmental determinism , arguing that culture lay at the core of the Inca civilization. The Inca people were a pastoral tribe in the Cusco area around the 12th century. Indigenous Andean oral history tells two main origin stories:
1581-528: A union of provinces. The Spanish normally transliterated the name as Tahuatinsuyo . While the term Inka nowadays is translated as "ruler" or "lord" in Quechua, this term does not simply refer to the "king" of the Tawantinsuyu or Sapa Inca but also to the Inca nobles, and some theorize its meaning could be broader. In that sense, the Inca nobles were a small percentage of the total population of
1674-486: A written form of language; however, they visually recorded narratives through paintings on vases and cups ( qirus ). These paintings are usually accompanied by geometric patterns known as toqapu, which are also found in textiles. Researchers have speculated that toqapu patterns could have served as a form of written communication (e.g. heraldry, or glyphs), however this remains unclear. The Incas also kept records by using quipus . The high infant mortality rates that plagued
1767-550: Is a type of bridge in which the deck is hung below suspension cables on vertical suspenders. The first modern examples of this type of bridge were built in the early 1800s. Simple suspension bridges , which lack vertical suspenders, have a long history in many mountainous parts of the world. Besides the bridge type most commonly called suspension bridges, covered in this article, there are other types of suspension bridges . The type covered here has cables suspended between towers , with vertical suspender cables that transfer
1860-607: Is actually a family of languages rather than one single language, parallel to the Romance or Slavic languages in Europe. Most communities within the empire, even those resistant to Inca rule, learned to speak a variety of Quechua (forming new regional varieties with distinct phonetics) in order to communicate with the Inca lords and mitma colonists, as well as the wider integrating society, but largely retained their native languages as well. The Incas also had their own ethnic language, which
1953-645: Is considered the last remaining Inca rope bridge and is rebuilt annually. The first iron chain suspension bridge in the Western world was the Jacob's Creek Bridge (1801) in Westmoreland County, Pennsylvania , designed by inventor James Finley . Finley's bridge was the first to incorporate all of the necessary components of a modern suspension bridge, including a suspended deck which hung by trusses. Finley patented his design in 1808, and published it in
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#17327976813202046-462: Is four and - ntin is a suffix naming a group, so that a tawantin is a quartet, a group of four things taken together, in this case the four suyu ("regions" or "provinces") whose corners met at the capital. The four suyu were: Chinchaysuyu (north), Antisuyu (east; the Amazon jungle), Qullasuyu (south) and Kuntisuyu (west). The name Tawantinsuyu was, therefore, a descriptive term indicating
2139-518: Is one of at least five civilizations in the world deemed by scholars to be "pristine." The concept of a "pristine" civilization refers to a civilization that has developed independently of external influences and is not a derivative of other civilizations. The Inca Empire was preceded by two large-scale empires in the Andes: the Tiwanaku ( c. 300 –1100 AD), based around Lake Titicaca , and
2232-453: Is thought to have been closely related to or a dialect of Puquina . There are several common misconceptions about the history of Quechua, as it is frequently identified as the "Inca language". Quechua did not originate with the Incas, had been a lingua franca in multiple areas before the Inca expansions, was diverse before the rise of the Incas, and it was not the native or original language of
2325-836: The Mahakam River , located in Kutai Kartanegara Regency , East Kalimantan district on the Indonesia island of Borneo , was built in 1995, completed in 2001 and collapsed in 2011. Dozens of vehicles on the bridge fell into the Mahakam River . As a result of this incident, 24 people died and dozens of others were injured and were treated at the Aji Muhammad Parikesit Regional Hospital. Meanwhile, 12 people were reported missing, 31 people were seriously injured, and 8 people had minor injuries. Research findings indicate that
2418-724: The Mapuche , who later would strategically defeat the Spanish as they expanded further south . The first engagement between the Inca and the Spanish was the Battle of Puná , near present-day Guayaquil , Ecuador, on the Pacific Coast; Pizarro then founded the city of Piura in July 1532. Hernando de Soto was sent inland to explore the interior and returned with an invitation to meet the Inca, Atahualpa, who had defeated his brother in
2511-470: The Old World . Anthropologist Gordon McEwan wrote that the Incas were able to construct "one of the greatest imperial states in human history" without the use of the wheel, draft animals, knowledge of iron or steel, or even a system of writing. Notable features of the Inca Empire included its monumental architecture , especially stonework, extensive road network ( Qhapaq Ñan ) reaching all corners of
2604-573: The Sapa Inca , to be the "son of the Sun". The Inca economy, especially in the past, was often the subject of scholarly debate. Darrell E. La Lone, in his work The Inca as a Nonmarket Economy , noted that scholars have previously described it as "feudal, slave, [or] socialist," as well as "a system based on reciprocity and redistribution; a system with markets and commerce; or an Asiatic mode of production ." The Inca referred to their empire as Tawantinsuyu , "the suyu of four [parts]". In Quechua , tawa
2697-690: The Wari or Huari ( c. 600 –1100 AD), centered near the city of Ayacucho . The Wari occupied the Cuzco area for about 400 years. Thus, many of the characteristics of the Inca Empire derived from earlier multi-ethnic and expansive Andean cultures. To those earlier civilizations may be owed some of the accomplishments cited for the Inca Empire: "thousands of kilometres/miles of roads and dozens of large administrative centers with elaborate stone construction...terraced mountainsides and filled in valleys", and
2790-448: The live and dead loads of the deck below, upon which traffic crosses. This arrangement allows the deck to be level or to arc upward for additional clearance. Like other suspension bridge types, this type often is constructed without the use of falsework . The suspension cables must be anchored at each end of the bridge, since any load applied to the bridge is transformed into tension in these main cables. The main cables continue beyond
2883-458: The " Requerimiento " that demanded that he and his empire accept the rule of King Charles I of Spain and convert to Christianity. Atahualpa dismissed the message and asked them to leave. After this, the Spanish began their attack against the mostly unarmed Inca, captured Atahualpa as hostage, and forced the Inca to collaborate. Atahualpa offered the Spaniards enough gold to fill the room he
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2976-523: The Acamama Valley; therefore, the couple decided to remain there and informed the inhabitants of the area that they were sent by the Sun God . They then proceeded to teach them agriculture and weaving. Thus, the Inca civilization began. Under the leadership of Manco Capac, the Inca formed the small city-state Kingdom of Cuzco (Quechua Qusqu ). In 1438, they began a far-reaching expansion under
3069-434: The Inca ). It narrates the adventure of a couple, Manco Capac and Mama Ocllo , who were sent by the Sun God and emerged from the depths of Lake Titicaca ( pacarina ~ paqarina "sacred place of origin") and marched north. They carried a golden staff, given by the Sun God ; the message was clear: in the place where the golden staff sank, they would establish a city and settle there. The staff sank at Mount Guanacaure in
3162-419: The Inca Empire caused all newborn infants to be given the term wawa when they were born. Most families did not invest very much into their child until they reached the age of two or three years old. Once the child reached the age of three, a "coming of age" ceremony occurred, called the rutuchikuy . For the Incas, this ceremony indicated that the child had entered the stage of "ignorance". During this ceremony,
3255-483: The Inca state and chuño has been questioned, as other crops such as maize can also be dried with only sunlight. Troll also argued that llamas , the Incas' pack animal, can be found in their largest numbers in this very same region. The maximum extent of the Inca Empire roughly coincided with the distribution of llamas and alpacas , the only large domesticated animals in Pre-Hispanic America . As
3348-455: The Inca to indoctrinate them into the Inca nobility and, with luck, marry their daughters into families at various corners of the empire. Pachacuti had named his favorite son, Amaru Yupanqui, as his co-ruler and successor. However, as co-ruler Amaru showed little interest in military affairs. Due to this lack of military talent, he faced much opposition from the Inca nobility, who began to plot against him. Despite this, Pachacuti decided to take
3441-459: The Inca used weapons made out of wood, stone, copper and bronze, while using an Alpaca fiber based armor, putting them at significant technological disadvantage—none of their weapons could pierce the Spanish steel armor. In addition, due to the absence of horses in Peru, the Inca did not develop tactics to fight cavalry. However, the Inca were still effective warriors, being able to successfully fight
3534-423: The Inca's only serious rival for the coast. Túpac Inca's empire then stretched north into what are today Ecuador and Colombia . Topa Inca's son Huayna Capac added a small portion of land to the north in what is today Ecuador. At its height, the Inca Empire included modern-day Peru, what are today western and south central Bolivia , southwest Ecuador and Colombia and a large portion of modern-day Chile , at
3627-408: The Incas. However, the Incas left a linguistic legacy, in that they introduced Quechua to many areas where it is still widely spoken today, including Ecuador, southern Bolivia, southern Colombia, and parts of the Amazon basin. The Spanish conquerors continued the official usage of Quechua during the early colonial period, and transformed it into a literary language. The Incas were not known to develop
3720-777: The Philadelphia journal, The Port Folio , in 1810. Early British chain bridges included the Dryburgh Abbey Bridge (1817) and 137 m Union Bridge (1820), with spans rapidly increasing to 176 m with the Menai Bridge (1826), "the first important modern suspension bridge". The first chain bridge on the German speaking territories was the Chain Bridge in Nuremberg . The Sagar Iron Suspension Bridge with
3813-552: The River Paiva, Arouca Geopark , Portugal, opened in April 2021. The 516 metres bridge hangs 175 meters above the river. Where such a bridge spans a gap between two buildings, there is no need to construct towers, as the buildings can anchor the cables. Cable suspension may also be augmented by the inherent stiffness of a structure that has much in common with a tubular bridge . Typical suspension bridges are constructed using
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3906-435: The Spanish colonists and re-create the Inca Empire until the late 18th century. See Juan Santos Atahualpa and Túpac Amaru II . The number of people inhabiting Tawantinsuyu at its peak is uncertain, with estimates ranging from 4–37 million. Most population estimates are in the range of 6 to 14 million. In spite of the fact that the Inca kept excellent census records using their quipus , knowledge of how to read them
3999-405: The Spanish conquest under the political authority of the Inca state. After the fall of the Inca Empire many aspects of Inca culture were systematically destroyed, including their sophisticated farming system, known as the vertical archipelago model of agriculture. Spanish colonial officials used the Inca mita corvée labor system for colonial aims, sometimes brutally. One member of each family
4092-426: The Spanish invaders first arrived in the empire. The spread was probably aided by the efficient Inca road system. Smallpox was only the first epidemic. Other diseases, including a probable typhus outbreak in 1546, influenza and smallpox together in 1558, smallpox again in 1589, diphtheria in 1614, and measles in 1618, all ravaged the Inca people. There would be periodic attempts by indigenous leaders to expel
4185-409: The Spanish retook the city afterwards. Manco Inca then retreated to the mountains of Vilcabamba and established the small Neo-Inca State , where he and his successors ruled for another 36 years, sometimes raiding the Spanish or inciting revolts against them. In 1572 the last Inca stronghold was conquered and the last ruler, Topa Amaru , Manco's son, was captured and executed. This ended resistance to
4278-594: The battle of the Maule was a stalemate, but argues the Incas lacked incentives for conquest they had had when fighting more complex societies such as the Chimú Empire . Silva also disputes the date given by traditional historiography for the battle: the late 15th century during the reign of Topa Inca Yupanqui (1471–93). Instead, he places it in 1532 during the Inca Civil War . Nevertheless, Silva agrees on
4371-509: The benefits of joining his empire, offering them presents of luxury goods such as high quality textiles and promising that they would be materially richer as his subjects. Most accepted the rule of the Inca as a fait accompli and acquiesced peacefully. Refusal to accept Inca rule resulted in military conquest. Following conquest the local rulers were executed. The ruler's children were brought to Cuzco to learn about Inca administration systems, then return to rule their native lands. This allowed
4464-432: The bridge deck. Before the deck is installed, the cables are under tension from their own weight. Along the main cables smaller cables or rods connect to the bridge deck, which is lifted in sections. As this is done, the tension in the cables increases, as it does with the live load of traffic crossing the bridge. The tension on the main cables is transferred to the ground at the anchorages and by downwards compression on
4557-491: The chains are not attached to abutments as is usual, but instead are attached to the main girders, which are thus in compression. Here, the chains are made from flat wrought iron plates, eight inches (203 mm) wide by an inch and a half (38 mm) thick, rivetted together. The first wire-cable suspension bridge was the Spider Bridge at Falls of Schuylkill (1816), a modest and temporary footbridge built following
4650-442: The civil war and was resting at Cajamarca with his army of 80,000 troops, that were at the moment armed only with hunting tools (knives and lassos for hunting llamas). Pizarro and some of his men, most notably a friar named Vincente de Valverde , met with the Inca, who had brought only a small retinue. The Inca offered them ceremonial chicha in a golden cup, which the Spanish rejected. The Spanish interpreter, Friar Vincente, read
4743-695: The claim that the bulk of the Inca conquests were made during the late 15th century. At the time of the Inca Civil War an Inca army was, according to Diego de Rosales , subduing a revolt among the Diaguitas of Copiapó and Coquimbo . The empire's push into the Amazon Basin near the Chinchipe River was stopped by the Shuar in 1527. The empire extended into corners of what are today
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#17327976813204836-631: The collapse of James Finley's nearby Chain Bridge at Falls of Schuylkill (1808). The footbridge's span was 124 m, although its deck was only 0.45 m wide. Development of wire-cable suspension bridges dates to the temporary simple suspension bridge at Annonay built by Marc Seguin and his brothers in 1822. It spanned only 18 m. The first permanent wire cable suspension bridge was Guillaume Henri Dufour 's Saint Antoine Bridge in Geneva of 1823, with two 40 m spans. The first with cables assembled in mid-air in
4929-529: The collapse was largely caused by the construction failure of the vertical hanging clamp. It was also found that poor maintenance, fatigue in the cable hanger construction materials, material quality, and bridge loads that exceed vehicle capacity, can also have an impact on bridge collapse. In 2013 the Kutai Kartanegara Bridge rebuilt the same location and completed in 2015 with a Through arch bridge design. On 30 October 2022, Jhulto Pul ,
5022-522: The collapse; several drivers escaped their cars on foot and reached the anchorages before the span dropped. Yarmouth suspension bridge (England) was built in 1829 and collapsed in 1845, killing 79 people. Peace River Suspension Bridge (Canada), which was completed in 1943, collapsed when the north anchor's soil support for the suspension bridge failed in October 1957. The entire bridge subsequently collapsed. Kutai Kartanegara Bridge (Indonesia) over
5115-571: The command of Sapa Inca ("paramount leader") Pachacuti Cusi Yupanqui (Pachakutiy Kusi Yupanki), whose epithet Pachacuti means "the turn of the world". The name of Pachacuti was given to him after he conquered the tribe of the Chancas during the Chanka–Inca War (in modern-day Apurímac ). During his reign, he and his son Topa Yupanqui (Tupa Yupanki) brought much of the modern-day territory of Peru under Inca control. Pachacuti reorganized
5208-439: The diverse ethnic groups ruled by the Inca "welcomed the Spanish invaders as liberators and willingly settled down with them to share rule of Andean farmers and miners". Many regional leaders, known as kurakas , continued to serve the Spanish overlords, called encomenderos , as they had served the Inca overlords. Other than efforts to spread the religion of Christianity , the Spanish benefited from and made little effort to change
5301-413: The empire joined modern-day Peru , what are now western Ecuador , western and south central Bolivia , northwest Argentina , the southwesternmost tip of Colombia and a large portion of modern-day Chile into a state comparable to the historical empires of Eurasia . Its official language was Quechua . The Inca Empire was unique in that it lacked many of the features associated with civilization in
5394-575: The empire was in the city of Cusco . The Inca civilization rose from the Peruvian highlands sometime in the early 13th century . The Spanish began the conquest of the Inca Empire in 1532 and by 1572, the last Inca state was fully conquered. From 1438 to 1533, the Incas incorporated a large portion of western South America , centered on the Andean Mountains, using conquest and peaceful assimilation, among other methods. At its largest,
5487-506: The empire, finely-woven textiles , use of knotted strings ( quipu or khipu ) for record keeping and communication, agricultural innovations and production in a difficult environment, and the organization and management fostered or imposed on its people and their labor. The Inca Empire functioned largely without money and without markets. Instead, exchange of goods and services was based on reciprocity between individuals and among individuals, groups, and Inca rulers. "Taxes" consisted of
5580-483: The empire, probably numbering only 15,000 to 40,000, but ruling a population of around 10 million people. When the Spanish arrived in the Empire of the Incas, they gave the name Peru to what the natives knew as Tawantinsuyu. The name "Inca Empire" originated from the Chronicles of the 16th century. The Inca Empire was the last chapter of thousands of years of Andean civilizations . The Andean civilization
5673-505: The empire. Perhaps more importantly, smallpox , influenza , typhus and measles had spread from Central America. The first epidemic of European disease in the Inca Empire was probably in the 1520s, killing Huayna Capac, his designated heir, and an unknown, probably large, number of other Inca subjects. The forces led by Pizarro consisted of 168 men, along with one cannon and 27 horses . The conquistadors were armed with lances , arquebuses , steel armor and long swords . In contrast,
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#17327976813205766-584: The failure of a few flawed strands in the hundreds used pose very little threat of failure, whereas a single bad link or eyebar can cause failure of an entire bridge. (The failure of a single eyebar was found to be the cause of the collapse of the Silver Bridge over the Ohio River .) Another reason is that as spans increased, engineers were unable to lift larger chains into position, whereas wire strand cables can be formulated one by one in mid-air from
5859-432: The family would invite all relatives to their house for food and dance, and then each member of the family would receive a lock of hair from the child. After each family member had received a lock, the father would shave the child's head. This stage of life was categorized by a stage of "ignorance, inexperience, and lack of reason, a condition that the child would overcome with time". For Inca society, in order to advance from
5952-442: The founder of the Inca. It is said that he and his sisters built the first Inca homes in the valley with their own hands. When the time came, Manco Capac turned to stone like his brothers before him. His son, Sinchi Roca, became the second emperor of the Inca. Legend collected by the mestizo chronicler Inca Garcilaso de la Vega in his work Los Comentarios Reales de los Incas ( transl. The Royal Commentaries of
6045-435: The frontier regions. The exact linguistic topography of the pre-Columbian and early colonial Andes remains incompletely understood, owing to the extinction of several languages and the loss of historical records. In order to manage this diversity, the Inca lords promoted the usage of Quechua , especially the variety of what is now Lima , as the official language or lingua franca . Defined by mutual intelligibility, Quechua
6138-432: The highway, which may be supported by suspender cables or their own trusswork . In cases where trusswork supports the spans, there will be very little arc in the outboard main cables. The earliest suspension bridges were ropes slung across a chasm, with a deck possibly at the same level or hung below the ropes such that the rope had a catenary shape. The Tibetan siddha and bridge-builder Thangtong Gyalpo originated
6231-638: The kingdom of Cusco into the Tahuantinsuyu, which consisted of a central government with the Inca at its head and four provincial governments with strong leaders: Chinchaysuyu (NW), Antisuyu (NE), Kuntisuyu (SW) and Qullasuyu (SE). Pachacuti is thought to have built Machu Picchu , either as a family home or summer retreat, although it may have been an agricultural station. Pachacuti sent spies to regions he wanted in his empire and they brought to him reports on political organization, military strength and wealth. He then sent messages to their leaders extolling
6324-597: The legends of Manco Capac and Mama Ocllo, and that of the Ayar brothers. The center cave at Tambo Tocco (Tampu T’uqu) was named Capac Tocco (Qhapaq T’uqu, "principal niche"). The other caves were Maras Tocco (Maras T’uqu) and Sutic Tocco (Sutiq T’uqu). Four brothers and four sisters stepped out of the middle cave. They were: Ayar Manco (Ayar Manqu), Ayar Cachi (Ayar Kachi), Ayar Auca (Ayar Awka) and Ayar Uchu (Ayar Uchi); and Mama Ocllo (Mama Uqllu), Mama Raua (Mama Rawa), Mama Huaco (Mama Waqu) and Mama Coea (Mama Qura). Out of
6417-534: The live loads. In an underspanned suspension bridge, also called under-deck cable-stayed bridge, the main cables hang entirely below the bridge deck, but are still anchored into the ground in a similar way to the conventional type. Very few bridges of this nature have been built, as the deck is inherently less stable than when suspended below the cables. Examples include the Pont des Bergues of 1834 designed by Guillaume Henri Dufour ; James Smith's Micklewood Bridge; and
6510-702: The modern method was Joseph Chaley 's Grand Pont Suspendu in Fribourg , in 1834. In the United States, the first major wire-cable suspension bridge was the Wire Bridge at Fairmount in Philadelphia, Pennsylvania. Designed by Charles Ellet Jr. and completed in 1842, it had a span of 109 m. Ellet's Niagara Falls suspension bridge (1847–48) was abandoned before completion. It was used as scaffolding for John A. Roebling 's double decker railroad and carriage bridge (1855). The Otto Beit Bridge (1938–1939)
6603-559: The north of Argentina and part of the southern Colombia . However, most of the southern portion of the Inca empire, the portion denominated as Qullasuyu, was located in the Altiplano . The Inca Empire was an amalgamation of languages, cultures and peoples. The components of the empire were not all uniformly loyal, nor were the local cultures all fully integrated. The Inca empire as a whole had an economy based on exchange and taxation of luxury goods and labour. The following quote describes
6696-514: The north of the Maule River . Traditional historiography claims the advance south halted after the Battle of the Maule where they met determined resistance from the Mapuche . This view is challenged by historian Osvaldo Silva who argues instead that it was the social and political framework of the Mapuche that posed the main difficulty in imposing imperial rule. Silva does accept that
6789-406: The pillars to deck-level supports, and further continue to connections with anchors in the ground. The roadway is supported by vertical suspender cables or rods, called hangers. In some circumstances, the towers may sit on a bluff or canyon edge where the road may proceed directly to the main span. Otherwise, the bridge will typically have two smaller spans, running between either pair of pillars and
6882-400: The production of "vast quantities of goods". Carl Troll has argued that the development of the Inca state in the central Andes was aided by conditions that allow for the elaboration of the staple food chuño . Chuño, which can be stored for long periods, is made of potato dried at the freezing temperatures that are common at nighttime in the southern Andean highlands. Such a link between
6975-413: The railing and the walking layer of Gyalpo's bridges used wires. The stress points that carried the screed were reinforced by the iron chains. Before the use of iron chains it is thought that Gyalpo used ropes from twisted willows or yak skins. He may have also used tightly bound cloth. The Inca used rope bridges , documented as early as 1615. It is not known when they were first made. Queshuachaca
7068-556: The region and be its viceroy . This approval was received as detailed in the following quote: "In July 1529 the Queen of Spain signed a charter allowing Pizarro to conquer the Incas. Pizarro was named governor and captain of all conquests in Peru, or New Castile, as the Spanish now called the land". When the conquistadors returned to Peru in 1532, a war of succession between the sons of Sapa Inca Huayna Capac, Huáscar and Atahualpa , and unrest among newly conquered territories weakened
7161-612: The roadbed, particularly owing to the unfavorable effects of using plate girders, discovered from the Tacoma Narrows Bridge (1940) bridge collapse. In the 1960s, developments in bridge aerodynamics allowed the re-introduction of plate structures as shallow box girders , first seen on the Severn bridge , built 1961–1966. In the picture of the Yichang Bridge , note the very sharp entry edge and sloping undergirders in
7254-461: The side caves came the people who were to be the ancestors of all the Inca clans. Ayar Manco carried a magic staff made of the finest gold. Where this staff landed, the people would live. They traveled for a long time. On the way, Ayar Cachi boasted about his strength and power. His siblings tricked him into returning to the cave to get a sacred llama . When he went into the cave, they trapped him inside to get rid of him. Ayar Uchu decided to stay on
7347-475: The society and culture of the former Inca Empire until the rule of Francisco de Toledo as viceroy from 1569 to 1581. The Spanish installed Atahualpa's brother Manco Inca Yupanqui in power; for some time Manco cooperated with the Spanish while they fought to put down resistance in the north. Meanwhile, an associate of Pizarro, Diego de Almagro , attempted to claim Cusco. Manco tried to use this intra-Spanish feud to his advantage, recapturing Cusco in 1536, but
7440-571: The stage of ignorance to development the child must learn the roles associated with their gender. The next important ritual was to celebrate the maturity of a child. Unlike the coming of age ceremony, the celebration of maturity signified the child's sexual potency. This celebration of puberty was called warachikuy for boys and qikuchikuy for girls. The warachikuy ceremony included dancing, fasting, tasks to display strength, and family ceremonies. The boy would also be given new clothes and taught how to act as an unmarried man. The qikuchikuy signified
7533-401: The suspension bridge shown. This enables this type of construction to be used without the danger of vortex shedding and consequent aeroelastic effects, such as those that destroyed the original Tacoma Narrows bridge. Three kinds of forces operate on any bridge: the dead load, the live load, and the dynamic load. Dead load refers to the weight of the bridge itself. Like any other structure,
7626-514: The ten bridges with the longest spans, followed by the length of the span and the year the bridge opened for traffic: (Chronological) Broughton Suspension Bridge (England) was an iron chain bridge built in 1826. One of Europe's first suspension bridges, it collapsed in 1831 due to mechanical resonance induced by troops marching in step. As a result of the incident, the British Army issued an order that troops should "break step" when crossing
7719-401: The top of the cave to look over the Inca people. The minute he proclaimed that, he turned to stone. They built a shrine around the stone and it became a sacred object. Ayar Auca grew tired of all this and decided to travel alone. Only Ayar Manco and his four sisters remained. Finally, they reached Cusco. The staff sank into the ground. Before they arrived, Mama Ocllo had already borne Ayar Manco
7812-489: The towers. In cable-stayed bridges, the towers are the primary load-bearing structures that transmit the bridge loads to the ground. A cantilever approach is often used to support the bridge deck near the towers, but lengths further from them are supported by cables running directly to the towers. By design, all static horizontal forces of the cable-stayed bridge are balanced so that the supporting towers do not tend to tilt or slide and so must only resist horizontal forces from
7905-568: The use of iron chains in his version of simple suspension bridges . In 1433, Gyalpo built eight bridges in eastern Bhutan . The last surviving chain-linked bridge of Gyalpo's was the Thangtong Gyalpo Bridge in Duksum en route to Trashi Yangtse , which was finally washed away in 2004. Gyalpo's iron chain bridges did not include a suspended-deck bridge , which is the standard on all modern suspension bridges today. Instead, both
7998-423: The weight of the cables is small compared to the weight of the deck. One can see the shape from the constant increase of the gradient of the cable with linear (deck) distance, this increase in gradient at each connection with the deck providing a net upward support force. Combined with the relatively simple constraints placed upon the actual deck, that makes the suspension bridge much simpler to design and analyze than
8091-661: Was built between 1829 and 1832, replacing a wooden bridge further downstream which collapsed in 1828. It is the only suspension bridge across the non-tidal Thames. The Széchenyi Chain Bridge , (designed in 1840, opened in 1849), spanning the River Danube in Budapest, was also designed by William Clark and it is a larger-scale version of Marlow Bridge. An interesting variation is Thornewill and Warham 's Ferry Bridge in Burton-on-Trent , Staffordshire (1889), where
8184-516: Was forced to work in the gold and silver mines, the foremost of which was the titanic silver mine at Potosí . When a family member died, which would usually happen within a year or two, the family was required to send a replacement. Although smallpox is usually presumed to have spread through the Empire before the arrival of the Spaniards, the devastation is also consistent with other theories. Beginning in Colombia , smallpox spread rapidly before
8277-517: Was imprisoned in and twice that amount of silver. The Inca fulfilled this ransom, but Pizarro deceived them, refusing to release the Inca afterwards. During Atahualpa's imprisonment, Huascar was assassinated elsewhere. The Spaniards maintained that this was at Atahualpa's orders; this was used as one of the charges against Atahualpa when the Spaniards finally executed him, in August 1533. Although "defeat" often implies an unwanted loss in battle, many of
8370-757: Was lost as almost all fell into disuse and disintegrated over time or were destroyed by the Spaniards. The empire was linguistically diverse. Some of the most important languages were Quechua , Aymara , Puquina and Mochica , respectively mainly spoken in the Central Andes, the Altiplano ( Qullasuyu ), the south coast ( Kuntisuyu ), and the area of the north coast ( Chinchaysuyu ) around Chan Chan , today Trujillo . Other languages included Quignam , Jaqaru , Leco , Uru-Chipaya languages , Kunza , Humahuaca , Cacán , Mapudungun , Culle , Chachapoya , Catacao languages , Manta , Barbacoan languages , and Cañari–Puruhá as well as numerous Amazonian languages on
8463-744: Was renamed in honour of Quebec Vice- Premier Pierre Laporte , who was kidnapped and murdered during the October Crisis of 1970 as construction of the bridge was nearing completion. The bridge was constructed for the Province of Quebec, Department of Roads in a joint venture with the private firm of Parsons Transportation Group. It carries Autoroute 73 northbound from Autoroute 20 , the Trans-Canada Highway , to Quebec City and Autoroute 40 and also northwards towards Saguenay . Suspension bridge A suspension bridge
8556-402: Was the Inca's way of teaching and accustoming them to pay tribute. Spanish conquistadors led by Francisco Pizarro and his brothers explored south from what is today Panama , reaching Inca territory by 1526. It was clear that they had reached a wealthy land with prospects of great treasure, and after another expedition in 1529 Pizarro traveled to Spain and received royal approval to conquer
8649-404: Was the first modern suspension bridge outside the United States built with parallel wire cables. Two towers/pillars, two suspension cables, four suspension cable anchors, multiple suspender cables, the bridge deck. The main cables of a suspension bridge will form a catenary when hanging under their own weight only. When supporting the deck, the cables will instead form a parabola , assuming
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