桩土作用对连续刚构桥桥墩受力的影响分析

Analysis on Influence of Pile-soil Interaction on Pier Stress of Continuous Rigid-frame Bridge

连续刚构桥由于具有较多优势而被广泛应用,设计参数的合理选择尤为关键。结合某连续刚构桥桥墩的受力分析,主要研究是否考虑桩土作用时主墩内力值的变化情况,指出对该类型桥梁的桥墩进行建模分析时应根据桩位处的实际地质情况按照"m法"模拟桩的边界条件。对比计算了考虑与不考虑桩土效应的内力,得到的一些结论对同类工程设计具有一定借鉴参考意义。

The continuous rigid-frame bridge is widely used because of its many advantages. The reasonableselection of design parameters is especially the key. Combined with the pier stress analysis of a continuous rigid-frame bridge, the main study is whether or not to consider the change of internal force value of the main pier during the pile-soil interaction. It is pointed out that the boundary condition of pile should be simulated by the "m method" according to the actual geological condition of pile location when modeling and analyzing the pier of this type of bridge. The article contrasts and calculates the internal forces of pilesoil effect considered or not considered. Some achieved conclusions can be referred for the design of the similar projects.