【摘要】 以建立基于抗剪抵抗机构的钢筋混凝土(RC)有开洞剪力墙的极限承载力分析模型为目的,在已有抗剪抵抗机构基础上(文中称之为“M-M”模型)提出改进“M-M”模型,其抗剪机构可简化为:洞口右侧倾角为1θ的斜向混凝土压杆a1、洞口左侧倾角为2θ的斜向混凝土压杆a2、纵向分布钢筋和洞口下方横向分布钢筋4部分.基于“M-M”模型和改进“M-M”模型推导了RC有开洞剪力墙极限承载力计算公式,并编制了计算程序.对23片不同配筋、不同几何尺寸和受力状态的RC有开洞剪力墙进行了2种模型的承载力试验值和计算值的分析比较,分析结果表明,改进“M-M”模型的理论计算结果和实验结果吻合较好,具有较高的计算精度,可以得出改进“M-M”模型能够较好地反映RC有开洞剪力墙的承载力特性,可供RC有开洞剪力墙抗剪强度验算参考.更多还原

【Abstract】 The purpose of research was to develop an analysis model to evaluate the ultimate strength of RC shear wall with opening based on the shear resistant mechanism.According to the existing shear resistant mechanism("M-M" model),modified "M-M" model was proposed and its shear resistant mechanism can be simplified as a composition of concrete strut a1with an inclination angle of θ1on the right side of the opening,concrete strut a2 with an inclination angle θ2 on the left side of the opening,longitudinal reinforcement bars and horizontal reinforcement bars under the opening of RC shear wall.The calculating equations for ultimate strength were provided from "M-M" model as well as modified "M-M" model and a computing program was developed to evaluate the strength of RC shear wall with opening.Comparison of ultimate strength tested with those obtained from two models by analysis was accomplished by this program.The analysis results show that the modified "M-M" model has better agreement with the test result,therefore,it can be concluded that the modified "M-M" model can better simulate the ultimate strength of RC shear wall with opening inpractice,and can be used to evaluate the strength of RC shear wall with opening.更多还原