【摘要】 对目前我国砌体结构设计规范(GB 50003—2001)和建筑抗震设计规范(GB 50011—2001)在砌体抗剪强度计算方法上存在的问题进行分析,根据最小耗能原理和正交各向异性材料的破坏准则,建立砌体在剪?压复合作用下的相关关系式,该式计算结果与试验结果吻合较好,能完整地表达剪摩、剪压和斜压3种破坏形态。通过对各种工况的砌体材料进行算例计算,建立了砌体静力抗剪强度和抗震抗剪强度计算公式,对2种规范的抗剪强度的取值进行了改进,式中统一采用轴压比作为主要变量来表达。研究结果可使2种规范在确定砌体抗剪强度时采用统一的方法,可供工程设计时参考。更多还原

【Abstract】 The problems in the shearing strength calculating method about "code for design of masonry structures"(GB 50003—2001)and "code for seismic design of building"(GB 50011—2001) was analysed.With the least energy consumption principle and the failure criteria of orthogonal anisotropic materials,the correlated formula of masonry during combined shear-compression action was established.The correlated formula with experimental results was in good agreement with each other.The three failure models about shear-friction,shear-compression,diagonal compression can completely be expressed with this correlated formula.On the base of calculating bearing capacity with various masonry material calculational examples,matching considerable experimental results,the calculation formula of the static shear strength and the aseismatic strength was established,by which the shear strength value of the two codes was improved.The calculation formula was expressed by axial compression ratio acting as main variable.The calculation method can uniformly be used by the two codes to calculate shear strength.The proposed method can provide an important reference to engineering design.更多还原