基于IDA的方钢管混凝土框架-SPSW核心筒结构地震易损性研究  

Research on seismic vulnerability of concrete-filled rectangular tubular frame-SPSW core tube structure based on IDA method

作　　者：张淑云[1] 李卓宇 马尤苏夫 郭珊 ZHANG Shuyun;LI Zhuoyu;MA Yousufu;GUO Shan(School of Architecture and Civil Engineering, Xi′an University of Science and Technology, Xi′an 710054, China)

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710000

出　　处：《世界地震工程》2021年第1期48-56,共9页World Earthquake Engineering

基　　金：国家自然科学基金(51708448)。

摘　　要：为研究方钢管混凝土框架-钢板剪力墙(SPSW)核心筒结构在不同强度地震下破坏概率,使用拉杆模型作为钢板剪力墙等效模型,与已有试验对比验证各参数有效性。以地震动峰值加速度(PGA)作为地震动强度参数,按照场地条件等要求选择11条地震动记录。以结构最大层间位移角作为损伤指标,对一典型方钢管混凝土框架-钢板剪力墙核心筒结构进行增量动力分析(IDA),得到IDA曲线簇。基于增量动力分析进行易损性分析,得到易损性曲线,并计算结构的抗倒塌储备系数。结果表明:8度多遇地震作用下,此结构处于正常使用状态。8度设防地震作用下,处于修复后可使用状态。8度罕遇地震作用下,处于生命安全状态。表明该结构具有良好的抗震性能,满足规范中“小震不坏”、“中震可修”和“大震不倒”的抗震设防目标。该结构抗倒塌储备系数大于规范建议值,具有较好的抗倒塌能力。To study the failure probability of concrete-filled rectangular tubular frame-steel plate shear wall core tube structure under the earthquake action of different intensity.Using the strip model as the equivalent model of the steel plate shear wall,the effectiveness of each parameter was verified by the existing experiments.Taking peak ground acceleration(PGA)as the ground motion intensity parameter,11 seismic records were selected according to the site conditions and other requirements.Using the maximum storey drift angle as the damage index,the IDA curves were obtained based on the incremental dynamic analysis(IDA).By using the incremental dynamic analysis,the vulnerability curve and collapse reserve coefficient were achieved.This study indicates that the structure remains normal working condition under 8 degree frequent earthquake,repairable state under 8 degree design earthquake and life safety state under 8 degree rare earthquake.The structure present good seismic performance,and can satisfy the requirements of“no damage under frequent earthquake”,“no unrepairable damage under design-based earthquake”,and“no collapse under the rare earthquake”.The collapse resistance reserve coefficient of the structure is greater than the recommended value,and the proposed structure has better collapse resistance.

关 键 词：方钢管混凝土框架 钢板剪力墙核心筒 增量动力分析 易损性分析 

分 类 号：TU398.2[建筑科学—结构工程]