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采用ABAQUS软件对中部开洞、一侧开洞及两侧开洞的钢板剪力墙进行了数值分析。对不同开洞形式的钢板剪力墙进行了弹性屈曲分析和非线性滞回分析,研究了洞口加劲肋刚度、强度对开洞钢板剪力墙性能的影响。研究结果表明:增大加劲肋刚度,可提高开洞钢板剪力墙的弹性屈曲应力,当肋板刚度比超过所提出的下限时,加劲肋对开洞钢板剪力墙屈曲应力的提高幅度降低;宽高比较大时,加劲肋对开洞钢板剪力墙屈曲应力的提高更加显著,在相同的肋板刚度比条件下,宽厚比不同的开洞钢板剪力墙屈曲应力的提高幅度基本相同。建议中部开洞、一侧开洞及两侧开洞钢板剪力墙的肋板刚度比下限分别取30,15和25。滞回分析结果表明:肋板刚度比对开洞钢板剪力墙弹性刚度、承载力和耗能能力影响较小。加劲肋强度过低时,无法充分发挥钢板剪力墙屈曲后的拉力场作用。按所提出的强度验算公式设计的加劲肋,可为开洞钢板剪力墙拉力场提供可靠锚固,确保拉力场充分发展。
ABAQUS software was used to analyze the shear wall in the middle of the hole, the hole on one side and the hole on both sides. The elastic buckling analysis and nonlinear hysteretic analysis of the steel plate shear walls with different open holes are carried out. The influence of the stiffness and strength of the stiffener in the opening on the performance of the steel plate shear wall with openings is studied. The results show that increasing the stiffener stiffness can increase the elastic buckling stress of the steel plate shear wall with open hole. When the stiffener ratio exceeds the lower limit, the increase of the buckling stress on the steel plate shear wall with the stiffener decreases When the width-height ratio is large, the buckling stress of the steel plate shear wall reinforced by the stiffener is more remarkable when the stiffener is bigger. Under the same condition of the stiffener ratio, the buckling stress of the steel plate shear wall with different thickness is basically the same . It is recommended that the rigidity of the stiffeners in the central opening, the one-side opening and the steel-plate shear walls with openings on both sides be 30, 15 and 25 lower than the lower limit, respectively. Hysteresis analysis results show that the stiffness ratio of the stiffeners has little effect on the elastic stiffness, bearing capacity and energy dissipation capacity of the steel plate shear walls with openings. When the stiffener strength is too low, the tensile force field after the buckling of the steel plate shear wall can not be fully utilized. The stiffeners designed according to the proposed strength checking formula can provide reliable anchoring for the tension field of the steel plate shear wall in the opening hole so as to ensure the full development of the tension field.