波形钢板-混凝土组合剪力墙的非线性有限元分析

Nonlinear finite element analysis of corrugated steel plate-concrete composite shear wall

以波形钢板-混凝土组合剪力墙的试验研究为基础,利用ANSYS建立了考虑黏结滑移的有限元模型;分析了混凝土墙体和波形钢板在试件加载过程中的受力性能,通过将有限元模型计算与试验所得的荷载-位移曲线进行对比分析,得出计算结果与试验结果吻合较好的结论。研究了栓钉对波形钢板和混凝土变形协调的影响,结果表明:墙体下部栓钉滑移量大于上部栓钉滑移量,可增大下部栓钉强度,以改善波形钢板和混凝土墙体的变形协调关系。分析了不同参数对波形钢板-混凝土组合剪力墙受力性能的影响,包括栓钉直径、栓钉间距、钢板厚度、墙体厚度、轴压比等。分析结果表明:增大栓钉间距会降低组合墙承载力和延性;栓钉直径、波形钢板厚度、配筋率对试件承载力影响不大;波形钢板厚度为2mm或轴压比为0.40时,试件延性明显降低;型钢厚度、墙体厚度、轴压比、剪跨比对试件承载力影响较大。

Based on the experimental study of a corrugated steel plate-concrete composite shear wall, a finite element model considering bond-slip is established by ANSYS. Through the comparative analysis of the finite element model calculation and the experimental load-displacement curve, it shows that the calculated results are in good agreement with the experimental results. The influence of studs on the deformation coordination of corrugated steel sheet and concrete is studied. The results show that the slip of studs in the lower part of the wall is larger than that in the upper part of the wall. The strength of studs in the lower part can be increased to improve the compatibility of deformation between corrugated steel plate and concrete wall. The effects of different parameters(including stud diameter, stud spacing, steel plate thickness, wall thickness, axial compression ratio, etc.) on the mechanical properties of corrugated steel plate-concrete composite shear wall are analyzed. The results show that the bearing capacity and ductility of composite wall reduces with the increase of the studs spacing. The diameter of bolts, the thickness of corrugated steel plate and the reinforcement ratio have little influence on the bearing capacity of the specimen. When the thickness of corrugated steel plate is 2 mm or the axial compression ratio is 0.4, the ductility of the specimens decreases obviously. The thickness of H shaped steel, the thickness of wall, the ratio of axial compression and the ratio of shear span have great influence on the bearing capacity of the specimen.