开洞波形钢板剪力墙受剪承载力及耗能能力分析

为明确波形钢板剪力墙不发生屈曲的界限条件并分析开洞对其承载力及耗能能力的影响，基于波形钢板剪切屈曲理论推导其屈曲应力计算式，并采用数值分析及变形等级划分方法得到约束刚度比取值范围，由此提出波形钢板剪力墙不发生屈曲的界限条件为屈曲应力大于剪切屈服应力且约束刚度比大于3。通过对比开洞模型的变形等级计算参数，验证界限条件对开洞波形钢板墙的适用性，建立有限元模型研究钢板墙高宽比、钢板厚度、开洞率、洞口高宽比及洞口位置对波形钢板墙承载力及耗能能力的影响。结果表明：钢板高宽比越小、板厚越大，开洞对其承载力及耗能能力的削弱程度越大，洞口高宽比在0.33~0.5之间时开洞波形钢板墙的承载力及耗能最大，中心开洞时的最小。基于波形钢板剪力墙全截面剪切屈服的受力机理对其受剪承载力和塑性耗能计算式进行推导，并通过拟合得到考虑洞口参数影响的开洞波形钢板剪力墙受剪承载力及耗能折减系数计算式；通过9组不开洞模型和30组不同洞口尺寸及位置的开洞模型对计算式的有效性进行验证。结果表明计算值与模拟值的误差均在15%以内，适用于满足无屈曲界限条件的开洞波形钢板剪力墙。

Analysis on shear capacity and energy dissipation of corrugated steel plate shear wall with openings

In order to clarify the boundary condition to avoid buckling of corrugated steel plate wall and analyze the influence of opening on its bearing capacity and energy dissipation capacity, the buckling stress formula was derived based on the shear buckling theory of corrugated steel plate, and the value range of constraint stiffness ratio was obtained by numerical analysis and deformation classification method. Therefore, the boundary condition of the non-buckling of corrugated steel plate wall was proposed as follows: the buckling stress is greater than the shear yield stress and the constraint stiffness ratio is greater than 3. The applicability of boundary conditions to corrugated steel plate walls with openings was JP2]verified by comparing the deformation grade calculation parameters of the models with openings, and the effects of the aspect ratio of wall panels, the thickness of steel plates, opening ratio, the height-width ratio of openings and opening position on the bearing capacity and energy dissipation capacity of corrugated steel plate walls were studied by establishing a finite element model. The results show that the smaller the aspect ratio is, the larger the thickness is, and the more degradation of the bearing capacity and energy dissipation capacity of the corrugated steel plate wall is caused by opening. The ultimate capacity and energy dissipation capacity of the corrugated steel plate wall with the opening reach maximum when the aspect ratio of the opening is between 0.33 and 0.5, and reach the minimum when the opening is in the center. The calculation formulas of shear capacity and energy dissipation reduction coefficient of corrugated steel plate walls with openings were obtained by fitting considering the influence of opening parameters. The formula was JP]verified by nine groups of models without openings and 30 groups of models with openings in different sizes and locations. The errors between the calculated values and the simulation values are within 15%, which is suitable for corrugated steel plate walls with openings to meet the non-buckling limit condition.