普通混凝土三轴压强度和变形试验研究  

Experimental Study on Strength and Deformation Characteristic of Normal Concrete under Triaxial Compression

作　　者：姚家伟[1] 宋玉普[2] 张众[3] 

机构地区：[1]大连民族学院土木建筑工程学院,辽宁大连116622 [2]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [3]山东理工大学,山东淄博255049

出　　处：《建筑科学》2011年第7期28-31,共4页Building Science

基　　金：国家自然科学基金资助项目(50679007);国家建设部科研基金项目(04-02-155);辽宁省教育厅高等学校科学研究项目(20060144);大连理工大学海岸和近海工程国家重点实验室开放基金(LP1002);中央高校基本科研业务专项资金资助项目(DC10020120)

摘　　要：利用大连理工大学海岸和近海工程国家重点实验室的大型混凝土静、动三轴试验系统,对普通混凝土进行了应力比为0.1∶0.25∶1、0.1∶0.5∶1、0.1∶0.75:1和0.1∶1∶1的常规三轴和真三轴试验,测得了混凝土的强度和变形,并根据试验结果,系统地探讨了处于常规三轴和真三轴受压下混凝土的强度和变形的性能,在八面体应力空间建立了三轴压普通混凝土的破坏准则。发现混凝土在三轴压应力状态下强度明显大于单轴应力状态下的强度,且中间应力对强度影响明显,设计中考虑这一因素及三轴压应力状态下强度的增大,将大大节省材料。Triaxial compressive experiments on strength and deformation were made to normal concrete,by using the large static-dynamic triaxial test system for concrete in the State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology.Design stress radios are 0.1∶0.25∶1,0.1∶0.5∶1,0.1∶0.75∶1,0.1∶1∶1,and the strength and deformation characteristics of normal concrete are measured and analyzed,additionally,failure criterion of normal concrete under triaxial compressive stress is established in octahedral stress space.Study on the experiments indicates that the triaxial compressive strength of concrete is greater than the uniaxial compressive strength,and the effect of middle stress is obvious.Inconsideration of these aspects in design,and we will save plenty of material.

关 键 词：混凝土 三轴压 强度 变形 

分 类 号：TU502.6[建筑科学—建筑技术科学] TU528