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以四川油坊沟高墩大跨连续刚构桥为研究对象,利用Midas/Civil建立全桥杆系模型,分析获得各个施工阶段及成桥阶段中的最不利内力组合;采用非线性有限元程序Mi-das/FEA建立0#块的空间有限元计算模型,根据圣维南原理,对其最大悬臂阶段下即内力最不利时的空间应力进行计算、分析,考察0#块在复杂受力状态下顶板、腹板、底板以及横隔板的应力分布情况与特点。同时,为施工和监控提供参考建议。
Taking the large-span continuous rigid frame bridge with high pier and high span in Yubeanggou, Sichuan as the research object, a full-bridge system model was established by using Midas / Civil to analyze and obtain the most unfavorable internal force combination in each construction stage and bridge stage. The nonlinear finite element program Mi -das / FEA The finite element model of 0 # block is established. Based on the Saint-Venant principle, the space stress under the maximum cantilever phase, which is the most unfavorable internal force, is calculated and analyzed. Stress distribution and characteristics of roof, web, floor and diaphragm. At the same time, provide suggestions for construction and monitoring.