《Earthquake Engineering and Structural Dynamics》杂志刊登“装有隔震装置的钢筋混凝土框架结构的非弹性响应”

作者：Donatello Cardone, Amedeo Flora, Giuseppe Gesualdi

刊物：《Earthquake Engineering and Structural Dynamics》，2013年，42卷第6期，871-889页

关键词：隔震；非弹性行为；钢筋混凝土框架；非线性时程响应分析

摘要：在仅在重力的作用下对装有隔震装置的钢筋混凝土框架结构的非弹性地震响应进行综合的参数研究。选择了2~8层楼房之间的平面大小为23m×10m的四个原型结构试件进行研究。所有的结构试件内部都在一个方向上有抗力架，该方向称为结构的强劲方向。砌体填充墙在正交弱方向上只有外抗力架。该结构形式是目前钢筋混凝土典型结构形式之一，其主要应用于上世纪六、七十年代的意大利和其他欧洲国家。基于大量二维结构在多个人工波和实际地震动荷载下非线性时程响应的分析结构进行参数研究。在参数研究中，结构的强度比(Fy/W)在0.03-0.15之间，试验测得屈服后刚度比的范围是0%-6%。考虑了大阻尼橡胶支座、铅芯橡胶支座和摩擦摆支座等三种不同类型的隔震系统。设计隔震系统允许上层结构在设计地震作用下出现塑性铰。非线性时程响应的分析结果表明：装有隔震装置的结构与固结地基结构相比，会经历较少的非弹性周期运动。总之，尽管装有隔震系统的结构可以接受有限的塑性变形，但隔震结构的破坏极限将基于上层结构的水平承载力，而不显著依赖于结构固有阻尼和延性能力。

Inelastic response of RC frame buildings with seismic isolation

Authors: Donatello Cardone, Amedeo Flora, Giuseppe Gesualdi

Journal: Earthquake Engineering and Structural Dynamics, Volume 42, Issue 6, pages871-889, May2013

Key words: seismic isolation; inelastic behavior; RC frames; nonlinear response-time history analysis

Abstract: A comprehensive parametric study on the inelastic seismic response of seismically isolated RC frame buildings, designed for gravity loads only, is presented. Four building prototypes, with 23 m × 10 m floor plan dimensions and number of storey ranging from 2 to 8, are considered. All the buildings present internal resistant frames in one direction only, identified as the strong direction of the building. In the orthogonal weak direction, the buildings present outer resistant frames only, with in filled masonry panels. This structural configuration is typical of many existing RC buildings, realized in Italy and other European countries in the 60s and 70s. The parametric study is based on the results of extensive nonlinear response-time history analyses of 2-DOF systems, using a set of seven artificial and natural seismic ground motions. In the parametric study, buildings with strength ratio (F_y/W) ranging from 0.03 to 0.15 and post-yield stiffness ratio ranging from 0% to 6% are examined. Three different types of isolation systems are considered, that is, high damping rubber bearings, lead rubber bearings and friction pendulum bearings. The isolation systems have been designed accepting the occurrence of plastic hinges in the superstructure during the design earthquake. The nonlinear response-time history analyses results show that structures with seismic isolation experience fewer inelastic cycles compared with fixed-base structures. As a consequence, although limited plastic deformations can be accepted, the collapse limit state of seismically isolated structures should be based on the lateral capacity of the superstructure without significant reliance on its inherent hysteretic damping or ductility capacity. 

原文链接：http://onlinelibrary.wiley.com/doi/10.1002/eqe.2250/abstract