空间非对称框架结构偏心扭转地震反应的控制

首先根据空间非对称框架结构的特点以及实施扭转振动控制的要求，采用当前发展较为成熟的RB（叠层橡胶支座）和LRB（重叠铅芯橡胶支座）作为调控隔震元件，建立了一种空间杆一层间计算模型。作者开发了多维地震动输入下的三维线性，非线性动力时程分析程序，对一典型多层非对称框架结构采用传统非隔震和基础隔震方案，水平输入地震波，进行了一系列的平动-扭转耦联地震反应对比分析，结果表明，通过设置隔震支座，可有效控制非对称建筑结构在地震激励下的偏心扭转效应。

The study on controlling eccentric torsional seismic response of the 3D asymmetric frame structure

In terms of the character of spatial asymmetric RC frame structure and the requirement of controlling torsion vibration, firstly a 3D member-story model is established with taking Rubber Bearing(RB) and Lead Rubber Bearing(LRB) as isolators. Based on the model, the authors develop a 3D linear and nonlinear dynamic time-history analysis program of frame structure under the multi-dimension ground motions. One typical multistory asymmetric RC frame structure subject to horizontal earthquake waves serves studying of the object, adoption of conventional fixed-base and RB or LRB base-isolated methods respectively. Then, a series of translation-torsion coupling seismic responses are analyzed comparatively. Finally, the calculated results show, that through making use of the base-isolated technique, the eccentric torsion effect of multistory asymmetric frame structure can be controlled effectively.