混凝土双轴拉-压试验研究与破坏准则分析  

Experimental study and failure criterion analysis of concrete under biaxial tension compression test

作　　者：张丽[1] 余振鹏 沈丽[1] 赵志青 谢兴华 ZHANG Li;YU Zhenpeng;SHEN Li;ZHAO Zhiqing;XIE Xinghua(Gongqing College,Nanchang University,Jiujiang 332020,China;School of Transportation,Southeast University,Nanjing 211102,China;Business School,Hohai University,Nanjing 211100,China;Hydraulic Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210029,China)

机构地区：[1]南昌大学共青学院,江西九江332020 [2]东南大学交通学院,江苏南京211102 [3]河海大学商学院,江苏南京211100 [4]南京水利科学院水工水力学研究所,江苏南京210029

出　　处：《混凝土》2019年第10期14-17,21,共5页Concrete

基　　金：国家重点研发计划项目（2016YFC0401704）;国家自然科学基金重点项目（51539006）

摘　　要：为探究定侧向加载方式下普通混凝土双轴拉-压力学性能,考虑6种不同侧向应力比,应用真三轴仪对普通混凝土进行双轴拉-压力学性能试验研究,得到不同侧向压力作用下,混凝土的破坏形态和应力-变形曲线,通过提取应力-应变曲线的峰值应力,分析不同侧向压应力下混凝土的破坏形态和主拉应力变化趋势,研究结果表明:混凝土双轴拉-压下的破坏形态均为劈拉断破坏形态,与侧向压应力的大小无关;随着侧向压应力的提高混凝土的主拉应力逐步降低,其破坏趋势与等比例加载方式相同。应用Kupfer双轴拉-压破坏准则方程验证试验数据,Kupfer破坏准则相对保守,同时基于Kupfer破坏准则提出定侧向加载方式下普通混凝土双轴拉-压破坏准则方程并通过相关试验数据进行验证。In order to explore the double axis tensile and pressure behavior of ordinary concrete under fixed lateral loading,six different lateral stress ratios were taken into consideration,and a true three axis tester was applied to study the tensile and pressure properties of ordinary concrete.Under the action of different lateral pressures,the failure form and stress deformation curve of concrete were obtained,and the stress was extracted.The peak stress of the strain curve is used to analyze the failure form of concrete and the trend of the main tensile stress under different lateral compressive stresses.The results show that the failure modes of the concrete under the double axis tension are all split and broken,and have nothing to do with the size of the lateral compressive stress;with the lateral compressive stress increasing the main tensile stress of concrete by the lateral compressive stress.The failure trend is the same as the proportional loading method.The Kupfer biaxial tensile pressure failure criterion is used to verify the experimental data,and the Kupfer failure criterion is relatively conservative.At the same time,based on the Kupfer failure criterion,the normal concrete biaxial tension and pressure failure criterion equation under the fixed lateral loading method is proposed and verified by the relevant experimental data.

关 键 词：普通混凝土 双轴拉-压 定侧向加载 试验研究 破坏准则 

分 类 号：TU528.01[建筑科学—建筑技术科学]