约束型双钢板混凝土组合剪力墙滞回性能的分析

Finite element analysis of hysteretic behavior of restrained double-steel concrete combined shear wall

借鉴钢管约束型混凝土柱的概念,本文提出了一种新型抗侧力结构——约束型双钢板混凝土组合剪力墙,即在每层组合剪力墙顶与楼板交接处将外包钢板切断并预留一定宽度的缝隙而形成的一种新型组合剪力墙,并利用有限元软件ABAQUS建立1片普通双钢板混凝土组合剪力墙和4片约束型双钢板混凝土组合剪力墙模型,分析不同宽度的缝隙对其滞回性能的影响。结果表明:在高轴压比作用下,相较于普通型双钢板混凝土组合剪力墙,约束型双钢板混凝土组合剪力墙的承载力、延性、耗能能力得到大幅提高,是一种能够很好改善双钢板混凝土组合剪力墙抗震性能的优良结构,在高轴压比n=0.5下约束型双钢板混凝土组合剪力墙的最优开缝宽度为外包钢板高度的3%(81mm)。

In this paper,with reference to the concept of steel-concrete-concrete concrete columns,a new type of anti-lateral force component-constrained double-steel-concrete composite shear wall is proposed,which is to cut off the outer steel plate by combining the shear wall top and the floor at each layer.A new type of combined shear wall formed by leaving a gap of a certain width.A finite element software ABAQUS was used to establish a common double-steel concrete composite shear wall and a four-piece constrained double-steel concrete composite shear wall model to analyze the effect of gaps with different widths on hysteretic behavior.The analysis results show that under the action of high axial compression ratio,the bearing capacity,ductility and energy dissipation capacity of the constrained shear wall are greatly improved compared with the common combined shear wall.It can improve the excellent structure of the seismic performance of the double-steel concrete combined shear wall.It is determined that the optimal slit width of the constrained double-steel-concrete composite shear wall under the high axial compression ratio is 3%(or 81 mm)of the height of the outer steel plate.