摘要
湖北省科技馆采用巨型钢框架-支撑结构体系,存在尺寸突变、扭转不规则、楼板不连续等不规则项,属于超限结构。为改善结构抗震性能,采取混合减震措施,在结构内布置屈曲约束支撑和防屈曲耗能钢板墙2种消能减震器。采用ABAQUS软件对结构进行施工模拟分析及动力弹塑性时程分析,研究罕遇地震作用下屈曲约束支撑和防屈曲耗能钢板墙混合减震效果,并给出定量评估,包括结构位移响应、构件损伤、能量耗散分布等。分析结果表明:2种消能减震器布置于结构薄弱位置,在提供结构刚度的同时,罕遇地震作用下作为结构第一道抗震防线,防屈曲耗能钢板墙产生良好的屈服塑性变形,屈曲约束支撑滞回耗能显著,有效保护了主体结构。
Hubei Science and Technology Museum adopts mega steel frame-braced structure system,which has irregular items such as size mutation,torsion irregularity and floor discontinuity,which belongs to ultra limit structure.In order to improve the seismic performance of the structure,hybrid damping measures were adopted,two kinds of energy dissipating dampers,buckling-restrained braces and bucking-restrained steel walls were arranged in the structure.The construction simulation analysis and dynamic elastic-plastic time history analysis were carried out by ABAQUS software,the hybrid seismic reduction effect of buckling-restrained braces and bucking-restrained steel walls under rare earthquakes was studied,the quantitative evaluation was given,including structural displacement response,component damage and energy dissipation distribution,etc.Results show that two kinds of energy dissipation dampers were arranged in the weak position of the structure,while providing the structural stiffness,they acted as the first seismic defense line of the structure under rare earthquakes.The buckling-restrained steel walls produced good yield plastic deformation,and the hysteretic energy dissipation of buckling-restrained braces was significant,which effectively protected the main structure.
作者
张慎
孟仲永
程明
李霆
许敏
熊森
陈元坤
ZHANG Shen;MENG Zhongyong;CHENG Ming;LI Ting;XU Min;XIONG Sen;CHEN Yuankun(Central-south Architectural Design Institute Co.Ltd.,Wuhan 430071,China)
出处
《建筑结构》
CSCD
北大核心
2021年第3期90-97,共8页
Building Structure
基金
住房与城乡建设部建设科技计划项目(2017-K5-014)。
关键词
湖北省科技馆
巨型结构
混合减震
屈曲约束支撑
防屈曲耗能钢板墙
动力弹塑性分析
Hubei Science and Technology Museum
mega structure
hybrid damping
buckling-restrained brace
buckling-restrained steel wall
dynamic elastic-plastic analysis
