摘要
根据材料三向等压荷载试验的结果 ,建立了考虑应力球量荷载历史影响的混凝土五参数强度准则。所进行的三向等压荷载试验选取了单轴抗压强度分别为 2 1 3MPa和 7 54MPa的A、B两组试块 ,获得了试块抗压强度损失和抗拉强度损失与所经历的以最大平均应力表示的荷载历史的经验关系 ,并发现两组试块所表示的经验关系中的参数基本相同。同时 ,还系统地研究和分析了各种加载路径对强度损失的影响。
A strength criterion of concrete, considered the effects of stress spherical tensor history, is proposed in the paper. It is based on experimental results and the five?parameter model. A test includes two groups of specimens with uniaxial compressive strength of 21 3 MPa and 7 54MPa respectively. The loading history can be expressed by the maximum average stress. An empirical formula between the reduced compressive/tensile strength and the loading history is established. It is found that the parameters in the empirical formula of the two groups of concrete are nearly identical. The effects of various stress paths on the strength of concrete are discussed based on the available data.
出处
《土木工程学报》
EI
CSCD
北大核心
2002年第5期1-6,共6页
China Civil Engineering Journal
基金
国家自然科学基金资助项目 (重点项目 50 1390 10 )
关键词
压应力
混凝土
单轴
抗压强度
Strength criterion, loading history, uniaxial compressive strength
