The Simulation Analysis Of Construction Of Cable-stayed Bridge With Wide Deck

The cable-stayed bridge has been widely used because of many advantages for itslarge spanning capacity, more material savings, easy cantilever casting. However, with theextensive application of cable-stayed bridge, the disease caused by thoughtless duringconstruction is increasing dramatically. Most studies are mainly directed at simulationanalyzing during the whole cantilever pouring process of cable-stayed bridge, and thestress caused by temperature changes have rarely been studied, especially for the bridgewith wide board, single-box and multi-rooms.In this paper, detailed calculation and analysis of the cable-stayed bridge during itscantilever construction are studied by creating plane-shell model and solid model throughutilizing the finite element analysis software ANSYS. Contents are as follows:(1)Use ANSYS to build the plate-shell model of the bridge. Handle the model withconstraints and load according to the actual construction conditions, then figure it out. Theresults show that: The construction stage is in line with the design and constructionrequirements. Displacement variation is also consistent with the actual engineeringsituation.(2)Use ANSYS to build the solid model of the bridge. Model is calculated accordingto the following five conditions: consider the effect of the deadweight, hanging basket,prestressed, cable force; consider the effect of the deadweight, hanging basket, prestressed,cable force and the component inside heating10℃; consider only the overall structurecooling40℃; consider bottom plate and template at the same time cooling10℃; considerthe top plate and bottom plate having a temperature difference of5℃. The results showthat: stress of the structure that under the action of deadweight, hanging basket, prestressed,cable force is average and small, proving that the design of structure is satisfy the stressrequirements; Structure of overall cooling40°C and the bottom plate and templatessimultaneously cooling10°C, have little effect on the structure. Thermal stress generatedby box girder temperature difference between internal and external components is large, sothe thermal stress caused by the temperature difference between the top plate and bottom plate is. If not controlled, the stress of this part will superimposed with the bridges deadload stress, then damage to the structure. Measures should be taken to avoid such thermalstress due to temperature differences in the construction process.