This manual is intended to be a guide for engineers working on bridge design projects for the wvdoh. These cables support the beam a cablestayed bridge, one of the most modern bridges, consists of a continuous strong beam girder with one or more pillars or towers in the middle the. Sap2000 tutorials training videos, manuals and model files. There are many other examples of ancient cable stayed bridge systems found around the world.
The cablestayed bridge is related to the cantilever bridge. Cablestayed the cable stayed bridge was developed after the second world war. Journal of engineering sciences, assiut university, vol. Cablestayed bridge committee for the posttensioning institute for consideration during their periodic updates of the guide specification, recommendations for stay cable design, testing, and installation. Runyons largely intact steel bridge in bluff dale, texas 1890. The bridge concept include a semifan, central suspended span and selfsupported cable stayed system.
The author discusses the design, analysis and construction of two innovative precast, prestressed concrete cable stayed bridges recently built in the czech republic. Over the last half century a large number of cablestayed bridges has been built or are under construction all over the world. Threespan continuous curved tubgirder bridge these topics and design examples are published separately for ease of use, and available for free download at the nsba and fhwa websites. For example, the recommended bike sharing system would present an. Bridge design requirements during the design of a cablestayed bridge structure, the con cept selected must meet the owners established requirements of aesthetics, operability, economics, maintainability, and functionability. An introduction to cablestayed bridges construction. In the schematic, you can see how the forces keep the bridge up. The first bridge was built across the elbe river near podebrady and the second bridge was built over a major railroad junction in praguevrsovice. For a longspan cablestayed bridge, the huge initial stress accumulated in the pylon and the girder will reduce the overall structure stiffness. Cable stayed bridges an overview sciencedirect topics. When a cablestayed bridge is chosen, the initial design phase is of utmost importance. Design and construction of cablestayed bridges in the.
The posttensioning institutes pti recommendations for stay cable design, testing and installation provide explicit design guidance for abrupt cable loss as well as cable replacement 1. Lrfd bridge design specifications, 5th edition with the 2010 interims. Alternatives in the design and construction of cablestayed. That bridge was one of the first cable suspension bridges to feature a stiffening truss and was used to carry a railway. Cablestayed bridges can be either concrete or steel though a. Cablestayed bridge tutorials computers and structures. A reference model is designed and used to investigate the influence of key design parameters on static behavior of a cable stayed bridge. Also an example of a cablestayed bridge is presented in chapter 2. In the longitudinal direction, the bridge is symmetric with respect to the midspan, and it include two towers and two set of cables. Alternatives in the design and construction of cable. The discussion is focused more on practical knowledge rather than on theoretical calculations. A finite element fe model for a cable stayed bridge. In this bridge, the cross section of the deck was similar to the one used in theodorheussbridgebernardetal. The disadvantage of such an auxiliary cable system is that the individual cables are very long and the large sag will be visually dominant when compared with the adjacent stay cable plane.
Cable stayed the cable stayed bridge was developed after the second world war. The definition of cablestayed bridge deck length used here is. Sap2000 tutorials training videos, manuals and model files 38 gb analysis and design of 11 storey building using sap2000, etabs, csicol, excel analysis and design of a building in sap2000 spanish analysis of frame structure using sap2000 beams modeling bridge design course with sap2000 building foundation modelling using sap2000. It provides policies, procedures and methods for developing and documenting the design process. Automatedhinge properties in sap2000 are computed automatically from the element material.
Pdf construction stages of cablestayed bridges with composite. A cable stayed bridge is a structure with several points in each span between the towers supported upward in a slanting direction with inclined cables and consists of main towers, cable stays, and main girders, as shown in fig. For example, in a radial pattern, cables extend from several points on the road to a single point at the tower, like numerous fishing lines attached to a single pole. Reducing the cost of a cable stayed bridge the objective of this paper is to encourage engineers to consider the possibility of using cable stayed bridges for relevant situations. The combination of multiple simple systems allows for a structure where the role of each of its components is well defined. An example of a cablestayed bridge that is an exception to the rectangular tower form is the modi. Cablestayed types bridge building bridges of dublin. Introduction cables stretch diagonally between these pillars or towers and the beam. It was not an entirely new concept, that is, where the cables from the deck are directly connected to the supporting columns or piers.
This bridge design manual was prepared by siteblauvelt engineers, inc. An illustration of the cable along with the input data and sample results is. Back span to main span ration while fixing the basic arrangement of cable stayed bridge should be such that it should be always less than 0. The purpose of this thesis is to preliminary design three bridge alternatives. For the cable stayed bridges built till the beginning of 1960s, each stay cable was generally composed. Composite cablestayed bridge main span length evolution. There are many other examples of ancient cablestayed bridge systems found around the. The designed shape configuration of girders and pretension in cables of cable stayed bridge can then be ensured and constructed.
The rapid progress of this kind of bridges is mainly due to the development of computer technology, high strength steel cables, orthotropic steel decks and construction technology. Because of its aesthetic appeal, economic grounds and the ease of. In fact, the cablestayed bridge is today one of the most common longspan bridge types to be built in new bridge construction. It is the most common construction choice today when a bridge is required to span more than 300.
For a bridge with a 1800 m 5902 ft main span and 38 m 125 ft width, a suspension bridge needs 46000 t 50700 tons of steel whereas a cable stayed bridge only needs 19200 t 21170 tons of steel see fig. Steel bridge tutorials computers and structures, inc. Bridge design to eurocodes worked examples worked examples presented at the workshop bridge design to eurocodes, vienna, 46 october 2010 support to the implementation, harmonization and further development of the eurocodes y. Minor bridge bridge having a total length up to 60 meters. In designing a cable stayed bridge there is first the problem of finding the required quantity of high strength steel for the cables. However, the design proved inadequate and the bridge was replaced in 1857. Comparison between three types of cable stayed bridges using. New cradle system for cablestayed bridges completes. Design and construction of cablestayed bridges can be. Tutorial included in the sap2000 bridgeexamples document. An image of a model taken from the sap2000 bridge examples document is shown in figure 1. A cable stayed bridge has one or more towers or pylons, from which cables support the bridge deck. The bridges are designed and constructed adopting the following irc specifications.
Steel bridges file cable stayed bridge cable stayed bridges dr. Reducing the cost of a cablestayed bridge the objective of this paper is to encourage engineers to consider the possibility of. A big difference between cantilever bridges and cablestayed bridges is that the former usually have a. A cablestayed bridge has one or more towers or pylons, from which cables support the bridge deck.
In the design of cablestayed bridges, the dead load often contributes most of bridge. Since the bridge is still in the design phase, the geometry and the. Another type of suspension bridge is a cablestayed design. The deck is made of three spans, the central one of 150 m and two lateral ones of 75 m each. This thesis examines issues other than design calculation in cable systems such as protection of. Attached is a model file and a pdf which outlines the procedure for modeling. List of longest cablestayed bridge spans wikipedia. An example of this latter arrangement can be seen with the design of the ting kau bridge, hong kong, which is a fourspan cablestayed bridge. T wo cablestayed bridges using precast, prestressed concrete segmental construction see figs. In this system, stay cables will be continuous and will run from anchors in the bridge deck, through the cradle at the top of the tower, and back down to the bridge deck on the other side. Analysis of the performance of cablestayed bridges under. In comparison with the continuous girder bridges, the internal forces due to both dead load and live load are much smaller in cablestayed bridges.
Cable stayed bridge committee for the posttensioning institute for consideration during their periodic updates of the guide specification, recommendations for stay cable design, testing, and installation. Cablestayed bridge as an alternative for medium and short. Since the concept of an extradosed bridge is still relatively new, there is no clear definition and specification. Bridge design requires experienced personnel knowledgeable in stateoftheart techniques and methodol ogies. Baseline modeling of the owensboro cablestayed bridge over the. Analysis of cablestayed bridges during construction by. Apr 26, 2015 sap2000 tutorials training videos, manuals and model files 38 gb analysis and design of 11 storey building using sap2000, etabs, csicol, excel analysis and design of a building in sap2000 spanish analysis of frame structure using sap2000 beams modeling bridge design course with sap2000 building foundation modelling using sap2000. For example, with the introduction of high performance steels over the last decade. The various response quantities bending moment,sf,afwith varying pylon shape and configuration with varying central span has been compared. Feb 02, 2016 the oldest application of the cable stayed bridge concept was found in the 17th century but the use of this design was prominently seen throughout the 1800s. The earliest known surviving example of a true cablestayed bridge in the united states is e. Early chinese people used the cablestayed system to construct suspension bridges out of hemp rope and iron chains 6. The increase in span required lighter and stronger deck.
Cablestayed bridge tutorials computers and structures, inc. Fhwa manual for orthotropic deck bridges us department of. Pdf this document describes an optimization problem of cable cross section of a. Also an example of a cable stayed bridge is presented in chapter 2. A continuous part of the bridge deck that is supported only by staycables and pylons, or are free spans.
In us practice, cable stayed bridges are the only long span bridge form routinely designed for member cable loss. Mitigation of windinduced vibration of stay cables. In this paper the cablestayed bridge design problem is posed in a multiobjective optimization format with goals of minimum cost and stress and a pareto solution is sought. For the conceptual design, the height of the cable stayed towers above the deck can be a ssumed to be 20% of the main span length figure ii 2.
Cablestayed bridges are extremely elegant and very effective structures and they are also architectural landmarks. This document is disseminated under the sponsorship of the u. An extradosed bridge is a unique bridge type that utilizes both prestressed girder bridge and cable stayed bridge concepts. Early chinese people used the cable stayed system to construct suspension bridges out of hemp rope and iron chains 6. Design of cable systems for cable suspended bridges. This is in contrast to the modern suspension bridge, where the cables supporting the deck are suspended vertically from the main cable. The bridge concept include a semifan, central suspended span and selfsupported cablestayed system. When a cable stayed bridge is chosen, the initial design phase is of utmost importance. A distinctive feature are the cables or stays, which run directly from the tower to the deck, normally forming a fanlike pattern or a series of parallel lines. The oldest application of the cable stayed bridge concept was found in the 17th century but the use of this design was prominently seen throughout the 1800s.
Cablestayed bridge committee for the posttensioning institute for. The cablestayed design uses less steel cable than a suspension bridge, and is faster and easier to build. The cable stayed bridge is related to the cantilever bridge. An extradosed bridge is a unique bridge type that utilizes both prestressed girder bridge and cablestayed bridge concepts. These cables support the beam a cable stayed bridge, one of the most modern bridges, consists of a continuous strong beam girder with one or more pillars or towers in the middle the cables are anchored. Cable stay bridge design free download as pdf file. Bridge examples pdf concrete boxgirder, steelgirder, and cablestayed bridge tutorials.
Two preliminary simplified cable stayed bridge backspan models are studied first in order to develop the dimensionless ratios that are applicabl response to the e bridge and to gain an insight into the cable stayed bridge behaviour. At the end of the document, two examples are included to show the. The posttensioning institutes pti recommendations for stay cable design, testing and installation provide explicit design guidance for abrupt cable loss as. Thus, there are three main objectives for this research, which are the effect of sudden loss of critical cables, cable loss due to blast loadings and progressive collapse triggered by the earthquake. Thus, there are three main objectives for this research, which are the effect of sudden loss of critical cable s, cable loss due to blast loadings and progressive collapse triggered by the earthquake. Optimum design of a controlled cable stayed bridge subject. Comparison between three types of cable stayed bridges. Sap2000 bridge tutorial pdf 7mb pdf concrete boxgirder, steelgirder, and cablestayed bridge tutorials. This model is submitted as part of a feasibility study for a cable stayed bridge to. Attached is a model file and a pdf which outlines the procedure for modeling a concrete boxgirder bridge, a steelgirder bridge, and a cablestayed bridge. This is ironic since the design is essentially a prototypical example of a bridge type that reemerged after world war ii to become a very popular bridge type. The technique of cablestayed construction has been used and continually developed over the last 50years. Design of single pylon cable stay bridge linkedin slideshare.
Krzysztof zoltowski and tomasz wask 2008, presented dynamic analysis and site test of cablestayed bridge over vistula river in plock. For the conceptual design, the height of the cablestayed towers above the deck can be a ssumed to be 20% of the main span length figure ii 2. Cable stayed bridges are extremely elegant and very effective structures and they are also architectural landmarks. Mar 27, 2019 attached is a model file and a pdf which outlines the procedure for modeling a concrete boxgirder bridge, a steelgirder bridge, and a cablestayed bridge.
The system was designed by consultant figg bridge engineers and will eliminate the need for the stay cables to be anchored in the single tower of the new bridge. A big difference between cantilever bridges and cable stayed bridges is that the former usually have a suspended span, and the latter do not. The tower of a cablestayed bridge is responsible for absorbing and dealing with compressional forces. The author discusses the design, analysis and construction of two innovative precast. Cable stay bridge design bridge deep foundation scribd. General data of the bridge according to the given conditions and the accepted concept of precast superstructures the bridge is designed as a cable stayed beam, with two spans 14. Cable stayed bridges ice manual of bridge engineering. This model is submitted as part of a feasibility study for a cable stayed bridge to cross over the nile river, egypt. This idea had been incorporated into some of the earlier suspension bridges, such as the albert bridge, london 1873 and the brooklyn bridge, new york 1883 to give the deck rigidity. Pdf a cablestayed bridge is built by following a construction sequence of different. Dynamic analysis in the form of time history analysis and aerostatic effect has been considered.