斜交板桥承载能力的有限元计算分析

The Calculation and Analysis of Finite Element Method for Bearing Capacity of A Oblique Slab Bridge

针对斜交板桥在道路等级提升的情况下,对原有桥梁荷载等级的增加进行了承载能力评定。首先运用两种不同的有限元软件分别建立梁格模型,并将加载后的计算结果与规范值进行对比;然后根据外观检测结果确定各项检算系数;最后对计算得出的结构荷载效应和抗力效应进行对比。结果表明:在仅仅加宽桥面的情况下,该桥无法满足城—A级汽车荷载要求;软件计算结果与理论计算结果相符。

In the case of the increasing road level,the bearing capacity assessment of the increasing load level of a oblique slab bridge was analyzed. With two different finite element software,the grillage models were built, then the calculation results were compared with the code value. Then the comprehensive modification coefficient were determined by the results of appearance inspection,and the load effect and the resistant effect were calculated and compared. The results show that the bridge could not satisfy city- A vehicle load with widening deck only; the results calculated by finite element method coincide with the results of the theoretical calculation and those could provide guidance for similar projects in future.