Finite Element Simulation of Preloading Deformation of Bridge Supports and Optimization of Pre-camber Setting
To study the preloading deformation pattern of scaffolds and optimize the traditional pre-camber setting curve,this paper uses the full-support scaffold pre-stress test of the Changsha-Zhuzhou-Xiangtan Western Ring Road elevated bridge section as the engineering background.Combining the design pre-stress plan with the on-site construction conditions,we select the measured data and simulate data of the 31-32 bridge span scaffold structure for comparative analysis.We optimize the pre-camber curve using polynomial fitting methods.The results indicate that the pre-camber setting curve for elevated bridges is not a smooth quadratic function curve,and the pre-camber curve obtained through a quartic polynomial fit better matches the actual on-site conditions.Additionally,by comparing the measured data of the 7-8 bridge span scaffold structure with the fitted pre-camber curve,it is confirmed that using polynomial fitting methods to optimize the construction pre-camber curve is feasible.The research findings can provide references for similar bridge preloading construction.
full-supportfinite element simulationpreloading deformationpre-camber optimization
NETL
NSTL
万方数据
