短肢剪力墙结构扭转效应有限元分析  

Finite Element Analysis of the Torsional Effect of Short-Limb Shear Walls

作　　者：周磊[1] 杨晓华[1] 卢学臣 ZHOU Lei;YANG Xiaohua;LU Xuechen(School of Civil Engineering of Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学土木工程学院,湖南株洲412007

出　　处：《湖南工业大学学报》2017年第2期28-32,共5页Journal of Hunan University of Technology

摘　　要：利用ANSYS有限元分析软件,建立三层短肢剪力墙空间结构有限元模型,通过改变控制参数和受力条件,研究轴压比、荷载偏心距和节点区箍筋配筋率对短肢剪力墙结构抗扭承载能力的影响,并将计算结果与一个结构模型试验结果进行对比。计算结果表明:当轴压比小于等于0.5时,短肢剪力墙结构抗扭承载能力随轴压比增加而增大,当轴压比超过0.5以后,结构抗扭承载能力随轴压比增加而降低;荷载偏心距增大,扭转效应加强,结构承载能力降低,扭矩增加加速了连梁端部受拉破坏,外边缘结构的连梁端部受到弯剪扭复合作用,是结构抗震的薄弱位置,建议加强配筋;适当增加节点区水平箍筋配筋率能有效提高结构抗扭承载能力。PA finite element model of a three-layered short-limb shear wall space structure has been established by using ANSYS software.By modifying the controlling parameter and stress condition,a research has been conducted on the influence of axial compression ratio,load eccentricity and stirrup reinforcement ratio in node areas on the torsional bearing capacity of short-limb shear walls,followed by a comparison between the experimental results and those of a structural model test.The conclusion shows that:the torsional bearing capacity of short-limb shear walls increases with the increase of axial compression ratio with its value at or under0.5,while the torsional bearing capacity of short-limb shear walls decreases with the increase of axial compression ratio with its value above0.5.The torsional effect has been strengthened and the structural bearing capacity has been reduced with the increase of the load eccentricity.The increase of the torque increases the tensile failure of the end of external structure of coupling beams under ending shear torsion,which makes the external structure a vulnerable place for seismic resistance that requires reinforcement.An appropriate increase in stirrup reinforcement ratio will effectively improve the torsional bearing capacity of structures.

关 键 词：短肢剪力墙空间结构 扭转效应 轴压比 偏心距 节点区箍筋配筋率 

分 类 号：U398.2[交通运输工程]