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砌体墙在竖向压力和平面内水平剪力复合作用下的破坏准则是确定砌体抗剪承载力的重要依据。通过对比分析,推导出基于最大主应力理论、剪摩理论、Mohr理论和变形能理论的适合于砌体在剪压复合作用下的破坏准则。考虑到微元体与宏观墙模型的差别,建立了相应于各种破坏准则的砌体抗剪承载力计算公式。并将公式的计算结果与收集的111片普通粘土砖砌体墙片的试验结果进行了对比分析,得到了常用多层砌体房屋墙的抗剪承载力计算公式。
The failure criterion of masonry walls under the combination of vertical pressure and horizontal shear force in plane is an important basis for determining the shear strength of masonry. Through comparison and analysis, the failure criterion suitable for masonry under shear-pressure combination is deduced based on the theory of maximum principal stress, shear friction theory, Mohr theory and deformation energy theory. Taking into account the difference between the micro-body and the macro-wall model, the formulas for calculating the shear strength of masonry corresponding to various failure criteria are established. The calculated results of the formula are compared with those of the 111 ordinary masonry masonry walls. The formulas for calculating the shear strength of masonry building masonry walls are obtained.