基于非线性时程分析的桥梁支座抗震性能研究

• 作 者: 邓俊雷 李睿 杨晶晶
• 机 构: 昆明理工大学建筑工程学院,云南睿德道路桥梁工程设计有限公司,
• 出 处: 建筑结构
• 发表日期: 2016年S2期
• 关键词: 抗震性能 橡胶支座 减隔震 分散型 动力时程分析 非线性时程分析 有限元分析 隔震系统 桥梁支座 桥梁下部结构

为研究LNR水平力分散型橡胶支座的抗震性能,以云南某桥为实际工程背景,运用有限元分析软件建立有限元模型,对水平力分散型橡胶支座、铅芯橡胶支座和抗震盆式橡胶支座进行了非线性动力时程分析比较。分析表明:使用水平分散型橡胶支座可延长结构的周期,减小结构地震动响应;水平分散型橡胶支座可以使桥梁下部结构水平力分散,各墩协同抵抗地震水平力作用,使内力分配更加合理;研究结果对非规则桥梁在E2地震作用下支座的设计,具有一定的指导意义。

In order to study the seismic performance of a force-dispersive rubber bearing with LNR level, a finite element analysis software is used to establish a finite element model of a bridge in Yunnan Province. The horizontal force-dispersion type rubber bearing, lead-rubber bearing and seismic cone Rubber bearings for nonlinear dynamic time history analysis and comparison. The analysis shows that the horizontal distributed rubber bearing can prolong the period of the structure and reduce the seismic response of the structure. The horizontal dispersed rubber bearing can disperse the horizontal force of the lower part of the bridge, and the piers cooperate to resist the horizontal force of the earthquake, Which is more reasonable. The research results have certain guiding significance for the design of bearing of irregular bridge under E2 earthquakes.