斜向往复荷载作用下方钢管混凝土柱的抗震性能及损伤分析  

Seismic Performance and Damage of Concrete Filled Square Steel Tubular Columns Under Inclined Horizontal Load

作　　者：周理[1,2] 苏益声 江兰[1] ZHOU Li;SU Yi-sheng;JIANG Lan(College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China;College of Architecture and Urban Planning, Guizhou University, Guiyang 550003, China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]贵州大学建筑与城市规划学院,贵州贵阳550003

出　　处：《土木工程与管理学报》2019年第1期48-54,共7页Journal of Civil Engineering and Management

基　　金：国家自然科学基金(51468003);高等学校博士学科点专项科研基金(20134501110001)

摘　　要：为研究斜向往复荷载作用下方钢管混凝土柱的抗震性能,以加载角度、轴压比及套箍系数为变量参数,对12个模型进行了有限元数值模拟。分析了各模型的滞回曲线、骨架曲线、延性系数、耗能能力等抗震指标,并利用Park-Ang模型进行了损伤指数计算。结果表明:随着加载角度的增加,构件滞回曲线的捏拢效应更为明显,承载能力及累积滞回耗能降低;当加载角度增加至45°时,累积滞回耗能降低约20%,极限承载能力降低约10%。损伤指数计算结果显示,加载角度对损伤指数影响不大,轴压比与套箍系数是影响结构抗震性能的核心因素。In order to investigate the seismic behavior of concrete filled square steel tubular columns under inclined horizontal load,considering loading angle,axial compression ratio,and confinement index,12 designed models were analyzed by using FEM software. Hysteretic curves,skeleton curves,ductility coefficient and cumulative hysteretic energy of all models were investigated in detail.Meanwhile,the damage index was calculated by using Park-Ang model. Results show that loading angle has a certain influence on the hysteretic curves,the skeleton curves,and the energy dissipation capacities. The pinching effect of the hysteretic curves was more remarkable as the loading angle increased. Furthermore,the ultimate bearing capacity and energy dissipation capacity decreased as the loading angle increased. When loading angle reached 45°,cumulative hysteretic energy consumption was reduced by about 20% and the ultimate bearing capacity was reduced by close to 10%. The damage index calculated by Park-Ang model shows that loading angle has little impact on damage index. The axial compression ratio and confinement index are the main factors affecting the seismic performance of the columns.

关 键 词：方钢管混凝土柱 斜向往复荷载 抗震性能 损伤分析 数值模拟 

分 类 号：TU398.9[建筑科学—结构工程]