钢梁—混凝土剪力墙刚性节点抗震性能研究

发布时间：2018-05-20 05:36

本文选题：钢梁-混凝土剪力墙节点 + 刚性连接　；参考：《西安科技大学》2017年硕士论文

【摘要】：钢梁-混凝土剪力墙节点是混合结构中受力的关键部位,目前,对刚性节点连接的钢梁-混凝土剪力墙节点抗震性能的研究尚不够充分,本文分别对平面外和平面内的钢梁-混凝土剪力墙刚性节点抗震性能进行研究,分析其在单调荷载和循环往复荷载下的变形与受力性能,本文的研究内容及结论如下:1.本文利用ABAQUS有限元软件分别建立平面内和平面外节点模型,其中型钢和混凝土选用实体单元,钢筋采用二维线性单元。钢材采用理想的弹塑性三折线模型,混凝土采用塑性损伤模型,荷载加载制度以位移加载控制,分别施加单调荷载和低周循环往复荷载,为获得节点的非线性受力过程提供有效分析手段。2.通过改变平面外钢梁-混凝土剪力墙节点的剪力墙厚度、剪力墙轴压比、剪力墙混凝土强度等级三个参数,根据有限元模拟结果对比荷载-位移曲线、节点滞回曲线、刚度退化曲线、骨架曲线,计算节点的延性系数、等效粘滞系数和能量耗散系数,分析总结平面外刚性节点受力特点和抗震性能变化规律。3.通过改变平面内钢梁-混凝土剪力墙节点的参数(剪力墙厚度、剪力墙轴压比、剪力墙混凝土强度等级)根据有限元模拟加载结果,通过对比分析,总结各参数对平面内刚性节点抗震性能的影响规律。经过分析得出:钢梁-混凝土剪力墙刚性节点在单调荷载作用下具备较高承载力,在低周反复循环荷载下节点螺栓连接处有应力集中现象。平面外、平面内刚性节点滞回曲线比较饱满,抗震性能较好。平面外刚性节点的等效粘滞系数为0.2-0.24,平面内刚性节点的等效粘滞系数为0.18-0.23,表明平面外、平面内刚性节点均具有良好的耗能能力。在平面内试件和平面外试件模拟中,提高混凝土的强度等级或者增大混凝土剪力墙的轴压比或者增大剪力墙厚度,试件的等效粘滞系数均不同程度的降低。
[Abstract]:The steel beam-concrete shear wall joint is the key part of the hybrid structure. At present, the seismic behavior of the steel beam-concrete shear wall joint connected with rigid joint is not enough. In this paper, the seismic behavior of rigid joints of steel beam-concrete shear walls outside plane and in plane is studied, and its deformation and mechanical behavior under monotone load and cyclic load are analyzed. The contents and conclusions of this paper are as follows: 1. In this paper, ABAQUS finite element software is used to establish in-plane and out-of-plane joint models, in which solid element is used for steel and concrete, and two-dimensional linear element is used for reinforcing bar. The ideal elastic-plastic three-fold model is used for steel, the plastic damage model is used for concrete, the load loading system is controlled by displacement loading, and the monotone load and low-cycle cyclic load are applied respectively. It provides an effective analysis method to obtain the nonlinear force process of the joint. 2. 2. By changing the thickness of shear wall, the axial compression ratio of shear wall, and the strength grade of shear wall concrete, the load-displacement curve and hysteretic curve of joint are compared according to the results of finite element simulation. Stiffness degradation curve, skeleton curve, ductility coefficient, equivalent viscosity coefficient and energy dissipation coefficient of joints are calculated. By changing the parameters of steel beam-concrete shear wall joints (shear wall thickness, shear wall axial compression ratio, shear wall concrete strength grade) according to finite element simulation loading results, The influence of various parameters on the seismic behavior of rigid joints in plane is summarized. It is concluded that the rigid joints of steel beam-concrete shear walls have high bearing capacity under monotonic load and stress concentration at the joint bolt joints under low cyclic loading. Outside the plane, the hysteretic curve of the rigid joints in the plane is relatively full and the seismic performance is better. The equivalent viscosity coefficient of out-of-plane rigid joints is 0.2-0.24, and that of in-plane rigid joints is 0.18-0.23, which indicates that both off-plane and in-plane rigid joints have good energy dissipation capacity. In the simulation of in-plane and outer-plane specimens, the equivalent viscosity coefficient of the specimens decreases in varying degrees by increasing the strength grade of concrete, increasing the axial compression ratio of concrete shear walls or increasing the thickness of shear walls.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.2;TU352.11

【参考文献】