超长多跨连续高架桥抗震性能研究

Study on Seismic Performance of Super-long Multi-span Continuous Viaduct

文章对超长多跨连续高架进行减隔震方案研究,结构拟采用速度限定型双曲面减隔震支座与固定及滑动摩擦摆式支座组合使用的方案,借助有限元计算软件建立桥梁空间模型进行动力特性分析,减隔震状态下结构纵桥向振型的周期有了显著的提升,同时进行反应谱分析,结构抗震性能满足规范要求。

In this paper,the seismic reduction and isolation scheme of super long multi span continuous viaduct is studied.The structure is proposed to adopt the scheme of the combination of speed limited hyperboloid seismic reduction and isolation bearing and fixed and sliding friction pendulum bearing.With the help of finite element calculation software,the spatial model of the bridge is established for dynamic characteristic analysis.Under the state of seismic reduction and isolation,the period of longitudinal and transverse vibration modes of the structure has been significantly improved,and the response spectrum analysis is carried out at the same time,The seismic performance of the structure meets the requirements of the code.