对砌体剪-压破坏准则的研究

对现有国内外剪压砌体破坏准则进行了分析比较,并指出了其中的不足.基于力学原理,采用数理统计分析法建立了剪-压砌体破坏准则.相对而言,该破坏准则不仅能反映剪-压砌体可能出现的各种破坏形式,而且不同破坏形式之间有明确的界限,力学概念明确,适用于各类砌体.由该准则推得的砌体抗剪强度计算值与试验结果、现行规范取值吻合较好,形式简单,便于计算,可供砌体结构理论分析和工程设计时参考.

Analyses of the Failure Criteria of Masonry in Compression-Shear

Analysis and comparison have been made on the failure criteria of masonry in compression-shear at home and abroad,and their shortcomings have been pointed out.The failure criteria of masonry in compression-shear have been established on the basis of mechanic principles and statistical method.By contrast,the failure criteria can not only reflect probable three kinds of destruction of masonry in compression-shear,but also provide definite boundary values among different failure modes.The mechanical concept is exact and suitable to all kinds of masonry.The shear strength values of masonry derived from the failure criteria founded by this paper agreed better with the testing results and the current codes values.The form of the formulae is simple,easy to be calculated and can provide reference for theoretical analysis and engineering design of masonry.