土压力作用下钢管混凝土组合桁架连续刚构桥墩受力分析

摘要

Wanzhou bridge is a CFST, Truss of variable cross-section Continuous rigid frame, the key pier is thin-walled high pier. The force analysis for the 7 g pier and full bridge under earth pressure of twenty metres by Civil Midas 2010. The results showed that soil pressure on the top structure of bridge is less affected, but it can make pier bending cracks, and increase the tensile stress of beam.%重庆万州大桥为钢管混凝土桁架变截面连续刚构，主墩为双肢薄壁高墩。采用CivilMidas2010模拟重庆万州大桥7#墩右侧距地面填土20m外，分析土压力对钢管混凝土桁架连续刚构桥墩及全桥的影响。结果表明土压力对桥梁上部结构影响较小，但会使桥墩弯曲产生裂缝，增加系梁的拉应力。