尺寸效应对混凝土芯样强度影响的试验研究  

Experimental study on effect on the size effect of compressive strength of concrete core samples

作　　者：刘红义[1] 张劲泉[1] 程寿山[1] 和海芳[1] 

机构地区：[1]交通运输部公路科学研究院,北京100088

出　　处：《四川建筑科学研究》2013年第5期123-126,共4页Sichuan Building Science

基　　金：西部交通建设科技项目(2008-318-223-43)

摘　　要：针对不同级配的普通混凝土分别钻取尺寸为100、67、49、32四种直径芯样,加工成高径比为1.5、1.2、1.0、0.8、0.5的混凝土芯样,测定其抗压强度。试验结果表明,直径相同的条件下,混凝土芯样随着高径比的减小芯样抗压强度增大,高径比相同的条件下,混凝土芯样随着直径的减小抗压强度的变化规律不一致,根据试验结果提出了不同直径和高径比的芯样与标准芯样抗压强度的换算系数,分别建立了换算系数关于直径和高径比的回归方程。100 mm,67 mm,49 mm,32 mm diameter core samples are drilled from different gradation level of ordinary concrete plan, then processed into high-diameter ratio 1.5,1.2.1.0,0.8.0. 5 of different core samples to determine their compressive sterngth. The results show that under the condition of the same diameter compressive strength of concrete core samples increase with high-diameter ratio reduced, and concrete core samples compressive strength varies inconsistently under the same high-diameter ratio condition. According to the results, conversion coefficients of compressive strength between nonstandard core samples and the standards are presented, regression equation of conversion factors were established on the diameter and height-to-diameter ratio.

关 键 词：尺寸效应 强度 混凝土芯样 直径 高径比 

分 类 号：TU528.31[建筑科学—建筑技术科学]