Finite Element Analysis Of Cable-stayed Bridge

Multi-span cable stayed bridges are unconventional structures, and many system conversions occurre during its construction process. Cables of multispaneable stayed bridges in the tower cable are laid in the main span, lacking of "side span cable". Therefore, under live load, the middle bridge towers have greater force and deformation, and the stiffness of bridge span structure are less than two-tower cable-stayed bridge. Multispaneable stayed bridges meet the shipping requirements, but also, have economic advantages. Therefore, constructing multispaneable stayed bridges is bridge construction trends. The article taking multispaneable stayed bridges for example, comprehensively analysis cable stayed bridge on finite element from the construction phase to operational phase.This article takes Great Road Zhaowang Creek Walkway Bridge,in Heze, as its engineering background, and uses finite element analysis software MIDAS/CIVIL to establish finite element model of the bridge.First of all, solve and optimize the reasonable cable force of the cable stayed bridge into the bridge, by synthetic method, and analysis the results to verify.the rationality of cable stayed bridge optimization cable force in the most unfavorable load combination. Then, substitute the best cable force obtained into the bridge finite element model,determine the first cable force and the reasonable construction state of Great Road Zhaowang Creek Walkway Bridge in reverse-install analysis method, draw girder bending moment diagrams in all the cable stayed bridge construction phase, analysis the bending moment diagrams and displacement contour maps of towers and the main beam in the end of the cable stayed bridge, comparative analysis the cable force theoretical value in the final status of bridge and the cable tension values during the reasonable bridge completion found by synthesis method. Finally, using MIDAS/CIVIL software,carry out finite element analysis about cable stayed bridge in the crowd loads,during the operational phase of the bridge,get stress analysis charts and displacement maps of girders and towers, to obtain monitoring and control data in the cable stayed bridge operational phase, assessment the cable stayed bridge project,as well as, generate great significance to monitoring and controlling in the cable stayed bridge operational phase.According to description and calculation above, more comprehensibly understand finite element analysis of cable-stayed bridge related principles, methods, etc; do more comprehensive finite element analysis to Great Road Zhaowang Creek Walkway Bridge, and obtain some valuable rules through a comparative analysis of the results. This provides an analysis of engineering case for finite element analysis of cable-stayed bridge, and has a certain reference value. At the same time, it also provides theoretical value of construction control parameters for the construction of Great Road Zhaowang Creek Walkway Bridge, and a similar experience in reference for the future cable-stayed bridge design.That has a certain reality significance.