L形截面双钢板组合剪力墙受力性能有限元分析

双钢板组合剪力墙结构因其整体性好、刚度大、抗剪承载力高等优点而广泛应用于高层建筑,国内外学者对其进行了大量研究,研究主要集中在“一”字形和T字形截面形式,对L形截面形式研究较少。本文在已有试验的基础上,分析了L形截面双钢板组合剪力墙结构的受力特点,通过有限元软件ABAQUS对L形截面双钢板组合剪力墙分析建模,与试验结果进行了对比,结果表明有限元模拟与试验结果较吻合；然后通过有限元参数化建模,研究了轴压比、钢板厚度、钢板强度、混凝土强度、端部H型钢尺寸等主要参数对剪力墙滞回性能的影响规律及其特征。研究结果表明,增加钢板厚度及端部H型钢尺寸、提高钢板强度及混凝土强度都会提高L形截面双钢板组合剪力墙承载力。其中钢板厚度及在无翼缘腹板处增设H型钢是影响承载能力的主要因素。最后,对L形截面双钢板组合剪力墙的设计轴压比建议不宜大于0.4。

Finite Element Analysis of L-shaped Double Steel Plate Composite Shear Wall

The double steel plate composite shear wall structure is widely used in the high-rise buildings due to its advantages of good integrity, high rigidity and high shear bearing capacity. In this paper, the mechanical characteristics of L-shaped section double steel plate composite shear wall structure were analyzed. The finite element software ABAQUS was used to model and analyze the L-shaped section double steel plate composite shear wall, and the results were compared with the experimental results, through the finite element parametric modeling, the influence and characteristics of the main parameters such as axial compression ratio, steel plate thickness, steel plate strength grade, concrete strength grade, end H-beam size and other parameters on the hysteretic performance of the shear wall were studied. Results showed that the finite element model fit well with the test results; the bearing capacity of specimens increased with decreasing height–width ratio; increasing the thickness of the steel plate and the size of the H-beam at the end, increasing the strength grade of the steel plate and the strength grade of the concrete would increase the bearing capacity of the L-shaped section double steel plate composite shear wall; the strength of the concrete and the addition of H-shaped steel at the flangeless web were the main factors affecting the bearing capacity. It is recommended that the design axial compression ratio of the L-shaped section double steel plate composite shear wall should be restricted under 0.4.