Analysis and design of cable stayed bridge pdf

Abstractin the recent years cable stayed bridges have. Cables are utilized in the form of suspension bridges, cable stayed bridges, tower guy wires etc. While steel was the dominating structural material, prestressed and composite decks have increasingly been used. The author discusses the design, analysis and construction of two innovative precast, prestressed concrete cable stayed bridges recently built in the czech republic. Cable stayed bridges are an elegant and efficient structural solution, and their use has been steadily increasing.

The author describes the evolution and basic concepts of cable stayed bridge systems. Other situations may call for cable stayed bridges, where the deck is not straight in plan but curved. Cable stayed bridge wizard model generation towers. Reference 11,12 carried out the optimization of cable stayed. In comparison with the continuous girder bridges, the internal forces due to both dead load and live load are much smaller in cable stayed bridges. So, the long span cable supported bridges like cable stayed bridge, suspension bridge and cable stayed suspension hybrid bridge with different lateral configuration is considered in the current study. Cablestayed bridge analysis using staad pro v8i youtube.

Seismic analysis of the cablestayed bridge full report. Cable stayed bridge is an aesthetic icon in the field of engineering. In this post a simplified model of suspension bridge is presented for the purpose of structural analysis and design. Bridge analysis in staad pro cable stayed bridge youtube. View enhanced pdf access article on wiley online library html view download pdf for offline viewing. Nonlinear dynamic analysis of cablestayed bridges excited by. 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. Design of cable systems for cable suspended bridges.

Action forces for equivalent systems action forces of actual systems bridge dynamics protection of bridges against ship collision preliminary design. Analysis of cable stayed bridge under the action of vehicular and seismic loads 1praveen kumar m, 2dr. Moreover, the possible extreme scenario which can trigger the progressive collapse of a cable stayed bridge should be studied. Genetic algorithmsbased optimization of cable stayed bridges. Design and construction of cablestayed bridges in the. A cablestayed bridge has one or more towers or pylons, from which cables support the bridge deck. Tech, 2professor and head, 3assistant professor department of structural engineering, ait, chikkamagalore, karnataka, india abstract. Analysis of the performance of cablestayed bridges under. Analysis of cable stayed suspension hybrid bridge long span cable supported bridge highly are defined through large number of cable.

Pdf optimum design of cablestayed bridges researchgate. In optimizing cable stayed bridges, the cross sectional area of stiffening girder, tower and cable are crucial and are decided based on the strength and stability criteria. They have recently proved to be highly costeffective for short to medium spans. The analysis based on an ideal state as well as the simulation and controls to reach it are common issues in the design and construction of a cable stayed bridge. Research on seismic safety, retrofit, and design of a. However, the cablestayed bridge concept offers more and can adapt to very special boundary conditionsthe outcome may be e. To conclude the study, a modal analysis showed that the cable stayed building is classified as a stiff building according to the guidelines from council on tall buildings and urban habitat. Probabilistic systemreliability methods have the potential to assist designers in better understanding the ultimate global behavior of bridges, thus leading to more economical, rational, and reliable structures. Cable stayed bridges an overview sciencedirect topics.

The first bridge was built across the elbe river near podebrady and the second bridge was built over a major railroad junction in praguevrsovice. Another type of suspension bridge is a cablestayed design. Among the most important nonlinear effects to consider in the design of a cable stayed bridge are cables and deck wind vibrations 3, 4, seismic analysis considering soilstructure interaction and multiple base excitations 5, 6, and pushover analysis to determine the resistant capacity 7. Their design, analysis, and construction can be very challenging, and fortunately there is a considerable amount of literature that can assist engineers with both the analysis and detailed design of cable stayed bridges.

Introduction in many structural applications, the ultimate purpose of using stochastic analysis is to determine the reliability of a structure, which has been designed to withstand the random excitations. The cable stayed bridge is modeled as a two dimensional system with. Overview of cable stayed bridges made from timber a sophisticated combination of timber and steel the basic component is one or several pylons which enable a wide span width without counter bearings due to the deflection of the tensile force. Some wellknown references for analysis and design of cable stayed bridges are gimsing and georgakis, walther et al. Wolff and starossek 2008 studied the collapse behaviour of a 3d cable stayed bridge model and found out that the initial failure loss of the three cables around the pylon can trigger a.

Cable stayed bridges elegantly demonstrate the evolution of the bridge engineering industry. Seismic analysis of the cable stayed bridge full report,ask latest information,abstract,report,presentation pdf,doc,ppt,seismic analysis of the cable stayed bridge full report technology discussion,seismic analysis of the cable stayed bridge full report paper presentation details. The author discusses the design, analysis and construction of two innovative precast, prestressed concrete cablestayed bridges recently built in the czech. In the recent years cable stayed bridges have received more attention than any other bridge mainly, in the united states, japan and europe as well as in thirdworld counties due to their ability to cover large spans. Seismic behaviour of cablestayed bridges universidad. For a longspan cable stayed bridge, the huge initial. Fu, university of maryland abstract the analysis based on an ideal state as well as the simulation and control to reach it are common issues in the design and construction of a cable stayed bridge. This paper intends to describe the conceptual design of a cable stayed bridge at taunton, somerset, united kingdom. In us practice, cable stayed bridges are the only long span bridge form routinely designed for member cable loss. Engineers found them technically innovative and challenging.

In this video a cable stayed bridge is analysed a bridge is a construction built to span physical obstacles such as a body of water, valley, or road, for the purpose of. A seismic risk analysis of modified fan type cable stayed bridges is presented using the concept of damage probability matrix. Seismic reliability analysis of cable stayed bridges against first passage failure rehan ahmad khan aligarh muslim university india 1. More than 600 cable bridges are constructed in the world till now while this process is in. These iconic structures require a careful orchestration of design, materials and conditional analysis. In the suspension bridge, a large cable hangs between two towers, and is fastened at each end to. The deck supports the loads and transfers them to the stays and to the piers through bending and compression.

The purpose of this thesis is to preliminary design three bridge alternatives. However, the analysis of the initial tensions of stay cables is usually very complicated due to the cable sag effect of. Study and analysis of cable stayed bridges using staad pro. A multipletower cable stayed bridge may appear similar to a suspension bridge, but in fact is very different in principle and in the method of construction. Normally, stay cables are pretensioned to reduce the impact of loads on the bridge. The development of the detailed design and the critical issues associated with the aerodynamic effects, fatigue effect on cable stays, layout of cable stays, deck and pylon of the cable stayed bridge have been briefly discussed. For spans up to about m, cable stayed bridges are more economical. Seismic reliability analysis of cable stayed bridges. Evaluation of systemreliability methods for cable stayed bridge design by michel bruneau,1 associate member, asce abstract. For a longspan cable stayed bridge, the huge initial stress accumulated in the. This is in contrast to the modern suspension bridge, where the cables supporting the deck are suspended vertically from the main cable. Static and stability analysis of longspan cable stayed steel bridges by shuqing wang and chung c.

Whereas, long span cable stayed bridges built today or proposed for future bridges are very flexible, they. This report focuses on a structural analysis and design for dmk bridge, a proposed 450 foot clearspan pedestrian bridge across the harlem river which connects randalls island to the east harlem section of manhattan, in new york city. In addition to designing one of north americas widest proposed cable stayed bridges, we also pioneered the first hybrid cable. Conceptual design of cable stayed pedestrian bridge at.

Virtually unknown 40 years ago, these bridges have become increasingly important as their properties have been more fully understood. In the design of cablestayed bridges, the construction analysis is very important since the worst stresses are usually reached during the construction process. 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. Optimum design of stay cables of steel cablestayed. The posttensioning institutes pti recommendations for stay cable design, testing and. Structural analysis of a 450 foot pedestrian cablestayed.

Cable stayed bridges can be recognized as a suitable solution for connecting widespan crossings. Design and analysis of a slanted cablestayed building. The design of cable stayed bridges, in comparison with the normal bridges, is controlled by the construction sequence, and the. Simulation of cantilever construction of cablestayed bridges. The structure of the cable stayed bridge is complex, and the cables are flexible, lightweight, low damping, etc. Design of cable systems for cable suspended bridges by jeanpierre michel chacar submitted to the department of civil and environmental engineering on may 21,2001 in partial fulfillment of the requirements for the degree of master of engineering in high performance structures abstract. The variety of forms and shapes of cable stayed bridges intrigues even the mostdemanding architects as well as common citizens. A brief history of cable stayed bridge is illustrated along with the structural components of it such as tower or pylon, deck systems, cable system supporting the. General design of cable stayedbridges the main structural elements of a cable stayed bridges are the bridge deck, piers, towers and the stays. All these features above make the mode of the cable stayed bridge a. Existing cablestayed bridges provide useful data regarding design.