L形短肢剪力墙有限元的仿真试验

Finite Element Simulative Test of L-shaped Shot-leg Shear Wall

本文采用有限元分析软件ANSYS,对L形短肢剪力墙结构从弹性到混凝土开裂直至破坏的全过程进行了仿真试验研究,分析了墙肢截面高厚比、混凝土强度等级、配筋率、轴压比4种因素对短肢剪力墙承载能力和变形能力的影响。结果表明:仿真试验比较真实地反映了这4种因素在结构中所起的作用,通过改变这4种因素能提高L形短肢剪力墙的承载能力和变形能力,但在实际结构设计中,需要考虑截面配筋率影响的特殊性,综合考虑试件的承载能力和变形能力,通过合理选择这些参数,能使短肢剪力墙具有较高的承载能力和良好的延性。

Simulative analysis on the whole process of L-shaped shot-leg shear wall from concrete elastic to plastic and crush is done by the general FEA program ANSYS. Some factors which influenced its load capacity and deformation capacity such as sectional depth-thickness ratio, concrete strength grade, reinforcement ratio, ratio of axial compressive force are analyzed. The results truly reflect the function of four kinds of factors on L-shaped shot-leg shear wahl. The results Show that load capacity and deformation capacity of L-shaped shot-leg shear wall can be improved by changing the four factors, but the particularity of reinforcement ratio impact should be considered in practice. Therefore,load capacity and deformation capacity can not be isolated and must he combined with each other in design. By reasonably choosing these parameters, shot-leg shear wall can be made with better performances in load capacity and ductility.