双柱墩盖梁墩顶负弯矩的取值分析

摘要

基于桥墩盖梁工程实例通过有限元软件，研究盖梁高度、桥墩支撑宽度、桥墩间距及桥墩高度的变化对盖梁内力影响，本文同时选取三种结构计算模型，研究双柱墩墩顶负弯矩建模的最简便而准确的简化方法。分析表明：采用梁单元建模，然后根据规范给出的公式对墩顶负弯矩进行削峰处理，所得到的结果与实体模型对比有明显差别，梁单元的方法过于保守，造成资源的浪费。%The finite element software is applied to analyze the effect of capping beam height, piers supporting width and piers spacing and height to capping beam internal force variation. In this paper, in order to find the simplest and the most accurate modeling method of striking the negative moment on distyle pier top, we selected three calculation models, which can provide a reference for future designers.