双钢板内填轻骨料混凝土剪力墙抗震性能分析及设计建议

Seismic Performance Analysis and Design Suggestions of Light Aggregate Concrete Shear Wall Filled in Double Steel Sheet

摘要: 为了提高双钢板剪力墙的抗震性能，减轻结构自重，本文提出了一种采用高强轻骨料混凝土的双钢板剪力墙(SLCW)。采用有限元分析ABAQUS软件，考虑钢板厚度、轻骨料混凝土强度、轴压比、剪跨比等参数，分别建立了13个SLCW构件的数值计算模型，并采用往复加载进行模拟数值试验研究，分析了上述参数变化对SLCW承载力、滞回曲线、恢复力模型、刚度退化、耗能性能、延性等的影响规律。结果表明：本文提出的内填轻骨料混凝土的双层钢板剪力墙具有良好的承载能力和抗震性能，延性系数均在2.0~3.3之间，具有良好的变形能力和耗能能力。增加钢板厚度、混凝土强度能提高组合墙体的承载能力和延性；轴压比的提高对承载力提高作用不明显，但对延性有改善作用；增加剪跨比会降低组合墙体承载力，但对延性有较好的提升。

Abstract: In order to improve the seismic behavior and reduce weight of the double steel sheet shear wall, a new high strength light-weight concrete filled double-steel-plate composite shear wall (SLCW) is proposed. The finite element analysis software ABAQUS is used in this paper. Considering the thickness of steel plate, strength of lightweight aggregate concrete, axial compression ratio, shearing span ratio and other parameters, the finite element analysis model of 13 SLCW components is established, and the influences on the bearing capacity, lag curve, recovery model, stiffness degradation, energy consumption performance and ductility, etc. of SLCW are analyzed. The simulated numerical test is carried out by reciprocating loading. As a result, the two-layer steel plate shear wall with lightweight aggregate concrete in this paper has good bearing capacity and seismic resistance, ductility coefficient is between 2.0~3.3, and has good deformation capacity and energy dissipation capacity. Increasing the thickness of steel plate and the strength of concrete can improve the bearing capacity and ductility of the composite wall; the increase of axial compression ratio does not obviously improve the bearing capacity, but it can improve the ductility; increasing the shear span ratio will reduce the bearing capacity of the composite wall, but it will improve the ductility better.