三参数双τ^(2)强度理论及其应用  

Three-parameter twinτ^(2)strength theory and its application

作　　者：陈四利 孟甜甜 CHEN Sili;MENG Tiantian(School of Architecture and Civil Engineering,Shenyang University of Technology,Shenyang 110870,Liaoning,China)

机构地区：[1]沈阳工业大学建筑与土木工程学院,辽宁沈阳110870

出　　处：《沈阳工业大学学报》2024年第4期457-461,共5页Journal of Shenyang University of Technology

基　　金：国家自然科学基金项目(51279109,51608332)。

摘　　要：针对工程中岩石、混凝土等材料在复杂应力状态下的破坏问题,提出了一种新的三参数双τ^(2)强度理论,利用3种特殊应力状态给出了数学表达式。考虑到极限应力比受材料性质的影响,选取不同压拉比、剪拉比应力值,对比分析了岩石、混凝土在不同应力状态下的理论数据与试验数据。结果表明:在新强度理论下理论预测曲线与混凝土、岩石材料在常见4种应力状态下的受力破坏相吻合,能够保证脆性材料在工程应用上的适用性和安全性。Aiming at the failure of rock,concrete and other materials in engineering under complex stress states,a novel three-parameter twinτ^(2)strength theory was proposed,and the mathematical expressions were formulated by using three special stress states.Considering the influence of material properties on the ultimate stress ratio,different compression-tension ratio and shear-tension ratio stress values were selected,and the theoretical data and the test data of rock and concrete under different stress states were compared and analyzed.The results show that the theoretical prediction curves according to the as-proposed new strength theory are consistent with the stress failure situations of concrete and rock materials under four common stress states,and that it can guarantee the applicability and safety of brittle materials for engineering application.

关 键 词：强度理论 应力状态 脆性材料 主剪应力 数学表达式 静水压力 三轴应力状态 双轴应力状态 

分 类 号：TU501[建筑科学—建筑技术科学]