钢筋混凝土桥梁纵向隔震设计与安装

摘要

通过对欧洲、美国和日本三国隔震设计方法的总结与归纳,选用两阶段水准反应谱分析方法,并采用非线性动力时程分析法进行结果校核,对实例公路桥梁进行了隔震设计与校核. 计算结果表明:在低水准地震作用下,桥墩截面按最小配筋率设计即可;在高水准地震作用下,桥墩已进入屈服阶段,屈服后采用非线性动力时程分析法校核,桥梁隔震能力满足设计要求,桥台、桥墩处的变形能力、结构周期、隔震能力显著提高,是地震频发地区桥梁设计的重要保障措施.%Through the summary of the isolation design methods in Europe, America and Japan, this study chooses two-stage standard response spectrum analysis method, uses the nonlinear dynamic time history to check the results, and designs and checks the actual highway bridge isolation. The results show that: in the low level of seismic action, the pier cross-section can be designed according to the minimum reinforcement ratio;In the high level of seismic action, the pier has entered a stage of yield, and after yield, with the method of nonlinear dynamic time history analysis, the bridge isolation ability can be checked to meet the design requirements. The deformation ability of abutment and pier, the periodic of structure, and capacity for isolation are greatly enhanced. The proposed method is an important safeguard of seismically active area of bridge design.