大桩帽轨道梁不同支承条件的受力分析

通过ANSYS软件对轨道梁的弹性点支承、刚性点支承、分布弹性支承以及空间模型进行有限元模拟，得出不同模型下的连续梁内力以及支座反力，并对不同模型的计算结果进行比较分析。计算结果表明，弹性点支承与刚性点支承模型在计算宽支座梁支座负弯矩时与分布弹性支承模型及空间模型差异较大，在支座边缘处采用弹性点支承模型计算弯矩削峰的方法已不再适用，同时得到宽支座梁支座反力、剪力等分布规律，可供大桩帽连续梁设计参考。

Force Analysis of Rail Beams with Big Pile Capping under Different Supporting Conditions

This paper simulates elastic point supporting, uniformly distribution elastic supporting, rigid point supporting and space models of rail beams with the Ansys finite element software, deducing the internal force of a continuous beam and the re- action of supports in different models and comparing the results of different models. The results reveal that elastic point support- ing and rigid point supporting models have larger difference with uniformly distributed elastic supporting and space model in calculating the negative moment of wide supporting beam, the method of using elastic point supporting model＇, s peak clipping moment as moment of support edge is no longer available. At the same time, the results show the distribution of wide supporting beam＇s shear and bearing reaction, it can provide a reference for design of big pile-capping beams.