西南地震区高墩装配式T梁桥支座设计研究

摘要

针对西南地震区高墩装配式T梁桥的支座选取,建立空间动力分析有限元模型,采用非线性时程波分析方法,对比研究板式橡胶支座方案、盆式支座方案和双曲面摩擦摆式减隔震支座方案随墩高变化时结构的响应规律.结果表明:板式橡胶支座方案适用性较强;墩高较矮时不建议采用盆式支座方案;地震烈度较高时,双曲面摩擦摆式减隔震支座方案可行.%In allusion to selection of supports of high -pier fabricated T -beam bridges in southwest seismic region, this paper establishes a spatial finite element model for dynamic analysis, and comparatively studies the rules of response of structures when plate type rubber support scheme,pot support scheme and hyperboloid pendulum isolation support scheme change with the height of piers.The results show that the plate type rubber support scheme exhibits strong applicability;the pot support scheme is not recommended when piers are short;and the hyperboloid pendulum isolation support scheme is feasible when seismic intensity is high.