| 双轴压混凝土在冻融循环后的力学性能及其破坏准则 |
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| 引用本文： | 覃丽坤, 宋玉普, 于长江, 张众. 双轴压混凝土在冻融循环后的力学性能及其破坏准则[J]. 工程力学, 2004, 21(2): 188-193. |
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| 作者姓名： | 覃丽坤 宋玉普 于长江 张众 |
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| 作者单位： | 1.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;2. 大连大学土建系, 辽宁大连, 116622 |
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| 摘 要： | 采用快速冻融方法,对普通混凝土进行0、25、50、75次冻融循环,并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,进行了5种比例加载路径的双轴压试验,测得了混凝土的强度,应力-应变关系曲线.用电子显微镜检验了混凝土承受不同冻融循环后的微观结构.根据试验结果,系统地探讨了冻融循环后,混凝土在不同比例加载下的双轴受压强度和变形等力学性能,在此基础上,建立了以应力空间表示的冻融循环后混凝土双轴压的破坏准则.它为北方寒冷地区的混凝土结构,如水坝、混凝土路面等处于双轴压组合荷载作用下混凝土结构的设计、分析提供了理论依据.
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| 关 键 词： | 混凝土 冻融循环 双轴压 力学性能 强度准则 |
| 文章编号： | 1000-4750(2004)02-0188-06 |
| 收稿时间： | 2003-04-28 |
| 修稿时间： | 2003-07-28 |
MECHANICAL PROPERTY AND FAILURE CRITERION FOR CONCRETE UNDER BIAXIAL COMPRESSIVE STRESSES AFTER CYCLIC FREEZING AND THAWING |
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| QIN Li-kun, SONG Yu-pu, YU Chang-jiang, ZHANG Zhong. MECHANICAL PROPERTY AND FAILURE CRITERION FOR CONCRETE UNDER BIAXIAL COMPRESSIVE STRESSES AFTER CYCLIC FREEZING AND THAWING[J]. Engineering Mechanics, 2004, 21(2): 188-193. |
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| Authors: | QIN Li-kun SONG Yu-pu YU Chang-jiang ZHANG Zhong |
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| Affiliation: | 1.State Key Laboratory of Coastal Offshore Engineering, Dalian University of Technology, Dalian 116024, China;2. Dept. of Civil Eng., Dalian University, Dalian 116622, China |
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| Abstract: | The tests of concrete specimens under 5 biaxial compressive stress states suffering 0,25,50 and 75 cycles of freezing and thawing were completed using a large static-dynamic triaxial test system for concrete in the State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology. The strength of concrete and the curve of stress-strain were measured. The microstructure of concrete after different freezing and thawing cycles were inspected using electron microscope. The mechanical properties, such as biaxial compressive strength and deformation under different proportional loadings are analysed based on the experimental results. Failure criterion of concrete under the biaxial compressive stresses after cyclic freezing and thawing is established in stress space. It serves as a reference for the design and analysis of dams, concrete roads, bridges which are subjected to biaxial compressive load in northern cold region. |
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| Keywords: | concrete freezing and thawing cycle biaxial compression mechanical property failure criterion |
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