温度变化下整体桥台后土压力实验研究

摘要

依托Glll线富裕工业园跨线桥工程,在该整体式桥台桥梁建成后,对全年台后土压力变化情况进行了监控,绘制了台后土压力的静态分布图及随着季节性温度变化的动态分布图,明确了整体桥台后土的分布规律:整体桥台后土压力数值随填土深度的增加而增加;存在桥台位移的临界值,使土压力分布由线性转变为非线性.确定了主梁温度变形极值时对应的台后土压力极值,为寒区整体式桥台设计荷载取值提供了理论依据.%This paper uses ANSYS instead of compiled procedure to optimize truss, to combine genetic algorithm optimization procedure with the structure finite element analysis procedure, making the data transmit between the two procedures. Thus, the combination can save a lot of time and improve the reliability of result. Simple genetic algorithm is characterized by" Premature Convergence (PC)" and weakness in local search. Considering the disadvantage of GA, this paper proposes to improve genetic algorithm. The result indicates this method, being correct and feasible, can fully display the merits of both ANSYS and the genetic algorithm. All in all, higher efficiency, better result and stronger usability are their merits.