钢板混凝土组合剪力墙轴压比影响研究  

Research on effect of axial compression ratio on steel plate concrete composite shear walls

作　　者：王金金[1] 范重[1] 邢超[1] 樊健生[2] 汪家继[2] 陶慕轩[2] 杨政 

机构地区：[1]中国建筑设计研究院,北京100044 [2]清华大学土木工程系,北京100084 [3]绿地集团宁夏置业有限公司,宁夏银川750001

出　　处：《建筑结构学报》2016年第7期29-37,共9页Journal of Building Structures

基　　金：中国建设科技集团股份有限公司科技创新基金项目(Z2014J09)

摘　　要：钢板混凝土组合剪力墙的抗震性能与轴压比关系密切。采用Marc有限元软件对不同轴压比的钢板混凝土组合剪力墙进行了弹塑性分析,以考察轴压比对钢板混凝土组合剪力墙的抗侧刚度、滞回性能、耗能能力、变形能力以及承载力的影响,并对其分析模型进行了试验验证。研究结果表明：钢板混凝土组合剪力墙正截面承载力随轴压比变化,当轴压比为0.4时,承载力达到最大值;当轴压比在0.2-0.4范围时,钢板混凝土组合剪力墙变形能力最大,耗能能力最强;当轴压比超过0.6时,其变形能力下降,延性减小,耗能能力减弱;轴压比对钢板混凝土组合剪力墙的初始刚度有一定影响,伴随着往复加载,墙体抗侧刚度不断减小。研究中为了验证有限元分析结果的可靠性,进行了钢板混凝土组合剪力墙压弯受力缩尺模型试验。有限元数值模拟结果与缩尺模型试验结果比较接近,而按照JGJ138—2012《组合结构设计规范》（报批稿）和纤维模型计算得到的钢板混凝土组合剪力墙正截面承载力偏于保守。为了保证钢板混凝土组合剪力墙良好的抗震性能,在实际工程中构件的轴压比设计值不宜过高。Axial compression ratio is closely related to the seismic behavior of steel plate concrete composite shear walls （SPCW）. Effects of axial compression ratio on the lateral stiffness, hysteretic behavior, energy dissipation capacity, ductility and bearing capacity of SPCW were analyzed by elasto-plastic finite element software. The results show that SPCW normal section bearing capacity changes along with axial compression ratio and reaches the maximum when the axial compression ratio is 0.4.SPCW has the maximum ductility and energy dissipation capacity when the axial compression ratio is in the range of 0.2 to 0.4. The deformation capacity, ductility and energy dissipation capacity decrease if the axial compression ratio exceeds 0.6. Meanwhile, axial compression ratio influences the initial lateral stiffness of SPCW. Lateral stiffness decreases with the cycles of reversed loading. To verify the reliability of the finite element analysis, a scaled compression-bending SPCW specimen test was carried out. The finite element analysis results agree well with the test results. While the normal section bearing capacities calculated by formula of JGJ138-2012 ＇the code for design of composite structure＇ and the fiber finite element model are conservative. In order to ensure good seismic behaviors of SPCW,the axial compression ratio should not be too high.

关 键 词：钢板混凝土组合剪力墙 轴压比 弹塑性有限元分析 拟静力试验 承载力 

分 类 号：TU973.14[建筑科学—结构工程] TU398.2