Agencies are incorporating more performancebased approaches such as seismic design into highway infrastructure. Crews have begun prep work for the saddle fix to the broken bolts on the new bay bridge east span, including chipping of concrete and drilling holes at the site of the bolt problem a concrete cap beam that sits underneath the decks at the eastern edge of the selfanchored suspension span. Constructing the worlds largest selfanchored suspension bridge laborers carrying cans of grikote anticorrosion paste on the southside span catwalk in the fog, 2012. The original suspension bridge over the tagus river in lisbon, portugal was constructed in 1966. Golden gate bridge usa, 1937, the longest suspension bridge from 1937 to 1964. This engineering and construction marvel raises the bridge building bar to new heights.
Jyoti prasad professor department of civil engineering, college of technology submitted by. The selfanchored suspension span of the new bay bridge. Shear keys are large steel castings of seismic stabilizers. San franciscooakland bay bridge design criteria contract 59a0040 100% submittal san franciscooakland bay bridge east span seismic safety project contract 59a0040 self anchored suspension bridge design criteria 0711502 100% submittal reference. Suspension bridge classification according to suspenders. It was a fourlane, self anchored suspension bridge that carried i2935 and state route 71 over the missouri river in kansas city, missouri. The bridge comprises two 250ftlong main spans and two 60ftlong approach spans, for a total length of 620 ft.
Bay bridge was replaced in 20 by a self anchored suspension bridge that can withstand the largest earthquake expected in a 1,500year period. Structure of a self anchored suspension bridge and analysis methodsstructureofaselfanchoredsuspensionbridge. Bay bridge overview self anchored suspension span iconic longest self anchored suspension bridge in the world 2,047 feet single 525foottall tower unique design deck sections arrive this summer. Practical formulas for estimation of cable tension by vibration method, journal of structural engineering, vol. Dynamic analyses of a selfanchored suspension bridge under. Based on a selfanchored cablestayed suspension bridge with an 800 m main span, its geometric nonlinearity under live load is studied. Rick land, tony anziano, peter siegenthaler, don rager via conference phone, ken terpstra, john kinsey, dave saber, mazen wahbeh.
To obtain a simple model and accurately understand the mechanical behavior of the whole structure in preliminary design, this paper proposed an analytical calculation method considering the combined effects of the main. Zhuanghe jianshe bridge built in china is a concrete self anchored suspension bridge with midspan of m and sidespan of m, as shown in figure. It was completed and opened to traffic on september 20. Seminar report on cable suspension bridge to be submitted in partial fulfilment of the requirement for the degree of bachelor of technology in civil engineering under the guidance of dr. San franciscooakland bay bridge seismic safety projects. Aug 31, 2015 the construction of the bridge approach section with twoway sixlane highway, or use the pier for oneself.
San franciscooakland bay bridge selfanchored suspension. Abstract the new self anchored suspension span of the east san franciscooakland bay bridge is the main subject of study of this research project. Nchrp report evolutions in the geometric design of highways. The basic differential equations of selfanchored cable. This paper presents a sensitivity and reliability analysis of a selfanchored suspension bridge by applying a new hybrid method proposed by the authors based on integration of the latin hypercube sampling technique lhs, artificial neural network ann, firstorder reliability method form, pearsons linear correlation coefficient plcc, and monte carlo simulation with important sampling. The suspension bridge shall be designed and built to perform like a self anchored suspension bridge. Introduction the bridge is a structure carrying a road, railway, path etc. Main cable construction using prefabricated parallel wire strand method ppws, first within the plant into steel wire strand, roll in the. Maroney3 abstract the signature span of the new eastern spans of the san francisco oakland bay bridge is an asymmetric self anchored suspension sas bridge. The bridge s unusual design has only a single main cable. The analysis results show that the longitudinal displacement of the main girder is much larger under longitudinal seismic input, so some inhibiting device or dampers should be used to avoid impacting. Design of continuous welded rail on a suspension bridge. Part ii preface this document presents the first part of my m.
Selfanchored suspension bridges transportation research board. The girder of self anchored suspension bridge is subjected to large compression force applied by main cables. Examples of recently constructed selfanchored suspension bridges using falsework from below. Longspan cablestayed bridges, suspension bridges, and cablestayed suspension bridges have been discussed a lot, but there are few papers relating to selfanchored cablestayed suspension bridges. For the self anchored suspension bridge with viscous damper device, the beam end. One signature element transforms the san franciscooakland bay bridge into a global icon the selfanchored suspension span sas. International journal of engineering and applied sciences.
The bridge is designed in such a way that all the forces acting on it are transferred to the ground. New eastern span of the bay bridge metropolffan transportation commission self anchored suspension bridge workshop submittal may 1991 sgerwtck. Nvf annual bridge conference 2014 unique bridges in qatar. Based on anchoring conditions, the suspension bridges can be classified intoexternally anchored or self anchored types, as shown in fig. The self anchored suspension bridge represents an innovative bridge. Currently, the largest self anchored suspension bridge is the yeong jong bridge. Crews have begun prep work for the saddle fix to the broken bolts on the new bay bridge east span, including chipping of concrete and drilling holes at the site of the bolt problem a concrete cap beam that sits underneath the decks at the eastern edge of the self anchored suspension span. First self anchored suspension bridge designed by vandepitte w. Monitoring results of a selfanchored suspension bridge. Ill add something about this to the article as well. Equivalentbeam theory of the selfanchored suspension bridge.
Illustration of a self anchored cablestayed suspension bridge. Using nonlinear static and dynamic analysis methods and adopting. Selfanchored suspension bridges with prestressed concrete deck 2819 the bridge in merelbeke designated as w12, shown in fig. The konohana bridge in osaka, japan, illustrates this type and provides a case study to compare conventional suspension bridge theory with the results of a finiteelement model. Deflection theory for selfanchored suspension bridges under live load article pdf available in journal of bridge engineering 207. For self anchored suspension bridges having the fabrication camber subjected to live loads, a new deflection theory is formulated after an optimized initial state solution is found under dead loads. Suspension bridge classification the engineering community. November 12, 2018 load rating project application complex detailed analysis suspension bridge self anchored suspension. An introduction to suspension bridges a suspension bridge is a type of bridge in which the deck the loadbearing portion is hung below suspension cables on vertical suspenders. International journal of engineering and applied sciences ijeas issn. The concept of self anchored suspension bridge was originated in second half of 19th century. And the schemes of cablestayed suspension bridge have been proposed many times, such as turkey izmit bridge, gibraltar strait bridge, lingdingyang bridge, and so on.
Self anchored suspension bridges august 7, 2012 self anchored suspension bridges differ from the type discussed in arts. The bridge deck may sit on the tower base but shall not be attached to the base. The static behavior of self anchored cablestayed suspension bridge under vertical load is described with the continuum method. It is the first time that the sas will be subjected to the. Early in the project the load transfer of the san franciscooakland bay bridge self anchored suspension span sas became known as the miracle. The 1989 loma prieta earthquake made clear the need to improve the safety of the highway system overpasses and bridges.
Analytical calculation method for the preliminary analysis. Dartmouthx the engineering of structures around us recommended for you. Deviation of the continuous cable at one of the ends of the bridge deck. Parametric study on static behaviour of selfanchored suspension. So, serious damage of the girder due to breakage of hangers may cause the collapse of the whole bridge. In order to achieve this goal, a self anchored suspension bridge of 275m span is modeled in sap 2000. The first phase of this final thesis project has been presented earlier by means of. Its website has quite a bit of information on this topic.
Research article parametric study on responses of a self. Parametric study on responses of a selfanchored suspension. Some different types of suspension bridges suspension. Construction technology and organization of jiande yangxi. A selfanchored suspension bridge is a suspension bridge in which the main cables attach to the ends of the deck, rather than to the ground via large anchorages. The ground anchored girders are erected after the self anchored girders by using the. Over the last 20 years, more than 60 self anchored suspension bridges have been constructed in china li 2012, xu 2016. At the time of its completion it was the largest self anchored suspension bridge in the world. In 1936, the longtime dream of linking the two locations was finally realized, and the nearly 5milelong san franciscooakland bay bridge was officially opened to traffic.
Conceptual design of superspan partial groundanchored. Pdf analytical method for main cable configuration of. Seismic response of cooperative system bridge under pile. Surgical demolition of the paseo bridge genesis structures. The bridge competition is designed to be an extended activity created from the trac pac 2 bridge builder module. The seismic response of the wusong bridge was analyzed though the response spectrum method and the timehistory method by adopting the midascivil. Since 1870, only about 25 highway bridges have been executed as a selfanchored suspension bridge. Opened for traffic in 1990, it has a main span of 300 metres 980 ft. Konohana bridge in japan is the longest self anchored suspension bridge. The east bay bridge would become the first singletower selfanchored suspension bridge and its scale would make it a unique world class structure. Feb 06, 20 analyze and calculates loads of a suspension bridge and comparing to a cable stayed bridge duration.
Deflection theory for self anchored suspension bridges under live load. Plans and specifications see toll bridge info dvbe program. An introduction to suspension bridges construction. Modal analysis results are presented for gas models. The stiffening girder of self anchored suspension bridge ssb is subjected to huge axial force because the main cable is directly anchored on the end of the stiffening girder. Some of these bridges were built in the 1950s over a canal around the city of ghent after a design by prof. Load must be transferred from the deck, through the strings, and to the towers. This suspension bridge is very similar to common modern suspension bridges such as the golden gate bridge.
The final portion of the paper evaluates the potential for self anchored suspension bridge design, and provides recommendations for design engineers. Bridge project project team response to qaqc expert panel recommendations file name application pdf. The paseo bridge was designed by howard, needles, tammen and bergendoff in the early 1950s, and built by american bridge co. The design is wellsuited for construction atop elevated piers, or in areas of unstable soils where anchorages would be difficult to construct. Selfanchored suspension bridges with prestressed concrete. Its main span is the longest in the world among all selfanchored suspension bridges constructed using double towers and double cables till. With the time increasing, the hangers may break suddenly for their resistance capacities decrease due to corrosion.
Parametric study of structural behavior of self anchored. Economic performance of cable supported bridges request pdf. Digital library search metropolitan transportation. Dynamic analysis of selfanchored suspension bridge to. River there are various designs of bridge to span different lengths. Deflection theory for selfanchored suspension bridges under. Selfanchored suspension bridges tu delft repositories. The superstructures cross section is composed of a triangular highperformance concrete hpc box girder, which is 32 ft 6 in. Analyze and calculates loads of a suspension bridge and comparing to a cable stayed bridge duration. This engineering and construction marvel raises the bridge. Selfanchored suspension bridges, aerostatic loads, aerostatic responses, aerostatic. Fabrication and construction of self anchored suspension bridge san francisco oakland bay bridge m. Unlike typical suspension bridges such as the golden gate or the western span of the bay bridge self anchored spans do not have their main cable tied to massive anchorages.
Construction method the ground anchored girder can be constructed by using the cantilever method step by step. West span expansion joint reconstruction project underway. In the 10 years following that tragic event, caltrans retrofitted or replaced more than 2,000 bridges and performed work on all 7 stateowned toll bridges in the bay area. Bridge designers in other words are force balancers. Geometric nonlinear analysis of selfanchored cablestayed. Use the terrain tool will make the pylon with the terrain does not move up and down movement, but the deck. Pdf deflection theory for selfanchored suspension bridges. Based on the partition generalized variation principle, considering the compressionbending coupling effect of the main girder and the tower, the large displacement incomplete generalized potential energy functional of threespan self anchored cablestayed suspension. The sas is the largest bridge of its kind anywhere in world 2,047 feet, one of many firsts. Suspension bridge midasoft bridge library containing project case studies, practical applications, and engineer presentations. This paper deals with a challenging bridge type, which is not very well known i.
Self anchored suspension bridges with prestressed concrete deck 2823. The number of self anchored suspension bridge is very limited as compared with the normal suspension bridge. Selfanchored suspension bridges differ from conventional. The eastern portion a cantilever bridge has been replaced with a self anchored suspension bridge which is the longest of its type in the world. A deck derrick crane can be used to elevate the beam segment, as shown in fig. If the bridge is built on the waterway, will ship direct to wear off, no physical collisions. It is not anchored to concrete or rock like other bridges, this bridge has cables that are anchored. The objective of this study is to research the structural behaviour of the relatively unknown selfanchored suspension bridges. A self anchored suspension bridge is a suspension bridge in which the main cables attach to the ends of the deck, rather than to the ground via large anchorages. A big drawback of suspension bridge is that they need to be anchored to the ground on either side. Repairing the worlds largest selfanchored suspension bridge the concept of constructing a bridge linking san francisco with oakland has existed since the early 1870s. Synopsis of the presentation project information located in pittsburgh, pa o. The effect of main cable and hangers is determined by modeling various types of cables and hanger patterns.
Constructing the worlds largest selfanchored suspension bridge. A study on tension measurement for cablesupported bridge, proceedings of the annual symposium of korean society of civil engineers, vol. Based on the theory in above, detailed analysis of a self anchored suspension bridge with the main span of 328 m is carried out and the reasonable design state is determined when the data about. Pdf the first bridge over ebro river at its delta was recently constructed, substituting a barge service. Sensitivity and reliability analysis of a selfanchored. This event is designed to allow students the opportunity to develop a self anchored suspension bridge that will be tested for strengthtoweight ratio. Bridging the bay competing designs presented to panel. Steam workshop single tower selfanchored suspension bridge.
Taking one typical twotower threespan selfanchored suspension bridge as an example, structural response has been characterized in detailed followed by its own construction steps. Research article geometric nonlinear analysis of self. Digital library search metropolitan transportation commission. Response properties of selfanchored suspension bridges to. The first modern examples of this type of bridge were built in the early 19th century. The design for the suspension bridge of this 7472 feet 2. Constructing the worlds largest self anchored suspension bridge laborers carrying cans of grikote anticorrosion paste on the southside span catwalk in the fog, 2012. The new selfanchored suspension bridge will be a landmark structure that cre ates a gateway to oakland while remaining in harmony with the rest of the bays suspension bridges. It is the moment of truth when the deck of the sas is lifted from the temporary trusses and becomes self supporting from the cables. Constructing the worlds largest selfanchored suspension. Analysis of selfanchored and groundanchored suspension bridges. Suspended spans of 308, 616 and 308 feet, south approach plate.