车轮与桥面铺装层接触应力计算分析

Calculation analysis of contact stress between vehicle wheel and bridge deck pavement layer

根据接触问题非线性的特点,采用有限元计算与现场试验测试相结合的方法,进行了车轮与桥面非线性接触应力的计算,探讨了接触计算条件和接触求解过程.在此基础上计算了车轮与桥面铺装层表面接触时的接触应力,得到了接触应力的分布形状和大小的规律,以及车轮作用下的局部轮压力是一个非均匀分布模式的结论.根据计算结果提出了车轮与桥面铺装层局部接触应力的计算模式,为桥面铺装层结构的设计计算提供了依据.

Considering the nonlinear characteristics of the contact problems,the computation of the nonlinear contact stress between the vehicle wheel and the bridge deck pavement layer is done by combining finite element calculation and field test.Based on discussing computational condition and solving process of contact,the contact stress is calculated when the wheel contacts the surface of the bridge deck pavement layer.Then the rules of the distributing shape and the stress values of the contact stress are found,which concludes that partial wheel pressure is an unevenly distributing pattern.Based on the computational results,the computation scheme of the partial contact stress is presented,which provides some beneficial references for designing the bridge deck pavement layer structure.