作　　者： ; ; ;

机构地区： 大连理工大学水利土木学院

出　　处： 《大连理工大学学报》 2009年第6期902-906,共5页

摘　　要： 通过试验研究大骨料三级配混凝土与其湿筛二级配混凝土在单轴、双轴及三轴应力条件下的强度差别.研究发现,单轴受压和受拉条件下三级配混凝土比其湿筛二级配混凝土的强度都有所下降,分别为27%和26%.在双轴受压条件下,三级配混凝土强度增加率高于其湿筛二级配混凝土,在应力比为0.5时,相差最大,强度提高率相差21.2%.在双轴拉压和三轴拉压压条件下,三级配混凝土强度降低率也高于其湿筛二级配混凝土.给出了它们在各种条件下具体的强度对比值和复杂应力下混凝土的破坏准则. The strength distinctions between three-graded big aggregate concrete and its wet-screened two-graded aggregate concrete under uniaxial, biaxial and triaxial stress states were researched. Experimental results show that the strengths of three-graded concrete are lower than the strengths of the corresponding wet-screened two-graded concrete under uniaxial compression and tension stress state by 27 % and 26 % respectively; strength increment rates of three-graded concrete are higher than those of wet-screened two-graded concrete under biaxial compression, and at the stress ratio of 0.5, it reaches the highest of 21.2%; strength decrement rates of three-graded concrete are also higher than those of wet-screened two-graded concrete under biaxial tension-compression and triaxial tension-compression-compression stress state. Strength comparisons and failure criteria under various axial stress states are also developed.

关 键 词： 大骨料混凝土 三级配 湿筛二级配 强度 破坏准则

领　　域： [建筑科学]