水压力与外力联合作用下混凝土Ⅰ型断裂试验  

Experimental Study on ModeⅠFracture of Concrete Under Combined Effects of Water Pressure and External Force

作　　者：任莉莉[1] 王学志[2] 邹浩飞[2] 刘钧玉[3] 郑淑文[2] 贺晶晶[2] 

机构地区：[1]辽宁铁道职业技术学院铁道工程系,辽宁锦州121001 [2]辽宁工业大学土木建筑工程学院,辽宁锦州121001 [3]沈阳工业大学建筑工程学院,辽宁沈阳110870

出　　处：《人民黄河》2016年第7期123-126,129,共5页Yellow River

基　　金：国家自然科学基金资助项目(51109134);辽宁省百千万人才千人层次项目(2011921059);辽宁省教育厅一般项目(L2013535)

摘　　要：为分析水压力和外力联合作用下混凝土的断裂现象,采用轴拉试件的形式进行了混凝土在恒定轴力施加水压力和恒定水压力施加轴力两种加载方式的Ⅰ型断裂试验研究,得到了两种加载方式下混凝土Ⅰ型断裂的双K断裂参数。试验结果表明,恒定水压力施加轴力试件与恒定轴力施加水压力试件相比,其黏聚力提供的断裂韧度更小;两种不同加载方式造成试件的破坏过程差异很大。For the fracture analysis of the concrete under combined effects of water pressure and external force,the mode Ⅰ fractureexperiment was carried out with concrete tensile specimens under the constant axial force variable water pressure and the constant waterpressure variable axial. The double K parameters for mode Ⅰ fracture of concrete under the two loading ways were gotten. The test results areconcluded that fracture toughness from cohesive force of the specimen under the constant axial force variable water pressure is smaller thanthat under the constant water pressure variable axial force and the failure process of the specimen by the two loading ways have greatdifferences.

关 键 词：水压力 外力 轴拉试件 Ⅰ型断裂 双K断裂参数 混凝土 

分 类 号：TV313[水利工程—水工结构工程]