防屈曲支撑加固钢筋混凝土框架拟静力试验设计  

Design of Cyclic Testing on Buckling-Restrained Brace Retrofitted Reinforced Concrete Frame

作　　者：张家广[1] 吴斌[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《结构工程师》2011年第B01期134-139,共6页Structural Engineers

基　　金：国家重点基础研究发展计划项目(973计划)(2007CB714204);国家科技支撑计划项目(2006BAJ03B06);地震行业科研专项经费(200808073)

摘　　要：防屈曲耗能支撑由于兼具普通支撑和金属阻尼器双重功能,近年来在高抗震设防烈度地区的新建筑结构设计和既有结构抗震加固中得到越来越多的应用。本文以河北省图书馆抗震加固工程为依托,从图书馆原结构中选取单榀、单层、单跨钢筋混凝土框架的1/2缩尺模型作为试验模型,制作两榀钢筋混凝土框架试件,并对其中一榀框架用课题组自主研发的一种组合钢管混凝土式防屈曲耗能支撑进行加固。对两榀框架试件分别进行拟静力试验,来考察防屈曲支撑对钢筋混凝土框架的强度、刚度、延性和耗能能力等抗震性能的影响。有限元分析结果表明,未加固框架试件的强度和刚度低、耗能能力较差;防屈曲支撑加固的框架试件的强度和刚度显著提高,耗能能力较好;防屈曲耗能支撑具有很好的滞回性能。本文的试验设计可为相关抗震分析和试验设计提供参考。Recently, buckling-restrained brace （BRB） is more and more widely used in the new structures design and seismic retrofit of existing buildings in high seismic regions, because it performs as both a common brace and metallic damper. Based on the project of seismic retrofit of Hebei province library buildings, a half -scale one story, single bay reinforced concrete （RC） frame model was selected from prototype structure as the testing model. Two RC frame specimens were fabricated, and one of these specimens was retrofitted with a novel type BRB. Cyclic testing will be performed to study the effect of the novel type BRB on strength, stiffness, ductility and energy dissipation capacity of RC frame. Finite element analysis results showed that the bare RC frame exhibited low strength and stiffness, poor energy dissipation capacity. However, BRB retrofitted RC frame exhibited larger strength and stiffness, excellent energy dissipation capacity. The testing design of this paper can provide a basis for related seismic analysis and testing design.

关 键 词：防屈曲耗能支撑 抗震加固 钢筋混凝土框架 拟静力 试验设计 

分 类 号：TU375.4[建筑科学—结构工程]