Structural Stress Analysis For Cable-suspended Pipeline Bridge

The performance analysis and research on reliability of the span cable-suspendedpipeline bridge were expounded emphatically by the theory analysis,model experiment andnumerical simulation. The static and dynamic performance have been analyzed in this paper.The reliability has been proposed. The weakness of the structure was found out and amodification scheme was put forward for the safety. The main results obtained are as follows:First,considering initial perstress and large deformation,the static analysis for normalstate and damage state was performed.The nonlinear characteristic of the spancable-suspended pipeline bridge caused the two flanks of pipe displacement is fewer changesand the among pipe displacement is descend notable,but the two flanks of pipe strain a littlebig. The dynamic performance in the condition of eaethquae,wind was analized. Nonlinearseismic time-history response analysis of the suspension pipeline bridge was carried out,including travelling-wave effect and multi-supported excitation. The effect of traveling-wavewas very striking. System was flexible and had good showing in seismatic performance.Combining the advantages and disadvantages of subproblem-approximation methodand the first-order optimization method，the initial strain and length were considered as designvariables, whereas the displacement and stress of pipe were the objective function. After theoptimization the static analysis was put in practice. The results showed that change curve ofpipe displacement and stress was more smooth than the results before optimization.Through the research for performance analysis of the large span cable-suspendedpipeline bridge, the basic desired purposes have been achieved. The appraisal system forperformance analysis of the large span cable-suspended pipeline bridge was formed.