楔入劈拉试验支承形式对混凝土断裂韧度的影响  

The effect of support on concrete fracture toughness in wedge-splitting test

作　　者：赵艳华[1] 韩飞[1] 陈晋[1] 

机构地区：[1]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116024

出　　处：《水利水电科技进展》2009年第4期10-13,共4页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(50708014)

摘　　要：针对楔入劈拉试件支座位置的不同,包括双线支座与单线支座,分析不同竖向荷载对断裂性能参数测试可能造成的影响,并通过试验数据进行验证。通过分析比较,认为对于实验室进行混凝土楔入劈拉试件的常用尺寸,支承体与传力装置所传荷载在一个竖向平面内可抵消竖向荷载和一部分构件自重,从而得到较为接近真实值的断裂性能参数。According to different support positions, including single support and dual support, the effects of different vertical loads on parameter tests of fracture properties are analyzed. The results have been verified by experimental data. Analysis and comparison of the results shows that for ordinary wedge-splitting specimens used in the laboratory, the fracture properties esfinmted will be close to the true values when the support is fixed vertically in the same plane with the force transferred, which can offset part of the weight.

关 键 词：楔入劈拉试验 支承 混凝土 断裂力学 断裂韧度 

分 类 号：O346[理学—固体力学] TU528[理学—力学]