Stress Analysis and Optimization During the Construction Process of Asymmetric Single Tower Cable-stayed Bridge
The stress characteristics during the construction process of asymmetric single tower cable-stayed bridges with semi floating systems are studied,and the construction control factors and their effects are analyzed.By optimizing the horizontal reaction force of the main tower support and the reaction force of the side span support,a reasonable scheme for cable tensioning and counterweight application is obtained.The research results indicate that in the construction process of asymmetric single tower cable-stayed bridges,the horizontal reaction force of the support at the tower beam connection should be the key factor for optimizing the construction process.To control the unbalanced horizontal force of the mid span cables,when using cantilever construction,the cables should be tensioned in two stages.The tension of one cable should be balanced with the weight of the cantilever beam segment,and then released to the design cable force after closure.According to the arrangement of construction procedures,the timing machine for batch application of side span counterweights of single tower cable-stayed bridges can be reasonably selected.
cable-stayed bridgessemi floating systemcablescable forcefinite element analysis
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