带限位装置的摩擦隔震结构动力特性及地震反应分析

提出了一种新型基础隔震模型，即带限位装置的摩擦隔震体系 (S- LF)；基于此隔震模型，利用 Poincare映射法研究地面谐运动下 S- LF结构的运动特征；并利用高精度的精细时程积分法，通过对地震作用下 S- LF动力响应的计算，绘制了上部结构最大加速度反应谱和基底最大滑移量反应谱，并研究了各种结构参数对隔震的影响；通过与恢复力摩擦隔震系统 (R- FBI)和纯摩擦力滑移隔震系统 (P- F)的比较表明， S- LF的隔震性能优于 P- F和 R- FBI；最后通过对计算实例的分析发现，地震作用下 S- LF结构的层间最大剪力和最大绝对加速度反应分布较一般传统结构有很大区别。

Dynamic Characteristics and Earthquake Response Analysis of Structures Supported on Slide-limited Friction Base Isolation System

This paper presents a new type base isolation system, i.e. the slide- limited friction base isolation system (S- LF). Based on this system, the harmonic and subharmonic periodic responses of S- LF subjected to ground harmonic motions are investigated by using the Poincare Map. Dynamic response of sliding structure subjected to earthquake ground motions are calculated with a high order precise direct integration method, and the numerical results are presented in maximum acceleration response spectra of superstructure and maximum sliding displacement response spectrum form. In comparison with isolation effects of pure- friction base isolation system (P- F) and resilient- friction base isolating system (R- FBI),it shows that the isolation characteristic of S- LF is superior to those of P- F and R- FBI. Finally, through analyzing an engineering example, it is observed that the distribution of maximum shear force between floors and maximum absolute acceleration of each floor of the sliding structure under earthquake ground motions are quite different from those of the traditional structures.