隔震技术在大跨空间网壳结构中的应用研究

摘要

文章介绍了基础隔振技术在结构抗震中的应用，给出了铅芯橡胶隔震支座的有限元模型和求解基础隔震动力方程的非线性方法，并结合实际工程，进行了大跨度凯威特网壳结构的基础隔震分析研究，可以得到，设置隔震系统之后，结构的自振周期明显增长，降低了结构的地震荷栽作用。上部结构的位移有所增大，符合隔震特征，但是需要注意结构的整体稳定性，结构的加速度得到了有效控制，同时对于下部结构的作用明显减小，可以对实际工程提供参考指导。%This paper describes the application of the basic seismic isolation technology in the structure anti- seismic, gives the finite element model of the lead-rubber bearings and the nonlinear method to solve the basic isolation dynamic equations, and carries out a large span Kai Weite shell structure of the base isolation analy- sis combined with the actual project. It can be concluded that after setting the isolation system, the natural cy- cle of the structure is significantly enlarged; after reducing the seismic loads, the displacement of the upper structure has been increased in line with the isolation features, but the overall stability of the structure should be assured; the acceleration of the structure has been effectively controlled, while its effect on the lower part of the structure is significantly reduced, providing a reference guidance for the actual project.