高韧性混凝土损伤容限特性研究  

Damage Tolerance Characteristics Study of High Toughness Concrete

作　　者：傅柏权[1] 蔡向荣[2] 

机构地区：[1]沈阳城市建设学院,沈阳市110167 [2]辽宁省建设科学研究院,沈阳市110005

出　　处：《北方交通》2016年第3期1-3,共3页Northern Communications

基　　金：辽宁省教育厅项目(L2014569)

摘　　要：通过三点弯曲试验研究了高韧性混凝土的损伤容限特性。研究结果表明,高韧性混凝土具有优秀的控制裂缝发展的能力以及抵抗由缺陷、裂纹或其它损伤而导致破坏的能力。与基体相比,高韧性混凝土的起裂荷载提高了约4倍,峰值荷载提高了约5倍,峰值荷载对应的裂缝口张开位移提高了约50倍,高韧性混凝土试件的荷载-裂缝口张开位移曲线更加丰满,其破坏模式为多缝开裂的延性破坏。In this paper, the damage tolerance characteristics of high toughness concrete are studied by three point bending test. The test results show that high toughness concrete has the ability to control the development of crack and the ability to resist the damage caused by cracks. Compared with the matrix, the initial cracking load of high toughness concrete increases about 4 times, and the peak load increases about 5 times, and the crack mouth opening displacement corresponding to the peak load increases about 50 times. The load - crack opening displacement curve of high toughness concrete specimen is more plentiful, and the failure mode is the ductile failure with multi -cracking characteristic.

关 键 词：高韧性混凝土 初始裂缝 多缝开裂 损伤容限 

分 类 号：U414.18[交通运输工程—道路与铁道工程]