防屈曲支撑-钢筋混凝土框架结构基于韧性的抗震设计方法研究  

Resilience-based aseismic design method for buckling-restrained braced-RC frame structure

作　　者：马恺泽[1] 李兰欣 邢国华[1] 陈韵如 MA Kaize;LI Lanxin;XING Guohua;CHEN Yunru(College of Architectural Engineering,Chang’an University,Xi’an 710061,China)

机构地区：[1]长安大学建筑工程学院,西安710061

出　　处：《振动与冲击》2025年第7期146-154,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(51908041);陕西省自然科学基金研究项目(2023-JC-YB-323)。

摘　　要：为实现防屈曲支撑-钢筋混凝土(buckling-restrained braced reinforced concrete,BRB-RC)框架结构基于韧性的抗震设计,引入韧性水平量化指标,建立建筑抗震韧性等级的分级,提出利用功能损失控制韧性指标的计算假定,并建立建筑多层级功能损失量化关系,提出根据建筑功能损失控制构件损伤及工程需求参数的方法。依据BRB-RC框架结构的受力机制,提出其基于韧性的抗震设计方法并建立设计流程。将设计方法应用于一幢5层的BRB-RC框架结构的抗震设计并进行罕遇地震作用下的弹塑性时程分析。分析结果表明,结构的层间位移角和层间剪力分布均满足设计要求,所提出的方法能实现预期的抗震韧性目标。Here,to realize resilience-based aseismic design of buckling-restrained braced reinforced concrete(BRB-RC)frame structure,the quantitative index of resilience level was introduced,the classification of building aseismic resilience levels was established,the calculation assumption of using functional loss to control resilience index was proposed,quantitative relations for building multi-story level functional loss were established,and a method for controlling component damage and engineering demand parameters according to building functional loss was proposed.According to working mechanism of BRB-RC frame structure,its resilience-based aseismic design method was proposed and its design flow path was established.The proposed design method was applied in aseismic design of a 5-story BRB-RC frame structure,and its elastic-plastic time history analysis was performed under the action of rare earthquake.The analysis results showed that both structural inter-story drift angle and inter-story shear force distributions meet design requirements,and the proposed method can realize the expected aseismic resilience goals.

关 键 词：建筑抗震韧性 防屈曲支撑(BRB) 钢筋混凝土(RC)框架结构 抗震设计 功能损失 

分 类 号：TU375[建筑科学—结构工程] TU318.1