裂缝切口形式对混凝土楔入劈拉试件断裂韧度的影响  

Effect of incision shapes of prefabricated crack on fracture toughness of concrete wedge splitting specimens

作　　者：田傲霜[1] 王学志[1] 

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001

出　　处：《混凝土》2011年第2期4-6,9,共4页Concrete

基　　金：国家自然科学基金项目(50709013)

摘　　要：对4种不同预制裂缝切口形式的普通混凝土试件和碾压混凝土试件进行楔入劈拉试验,得到了各种工况下不同切口形式试件的断裂韧度。分析了预制裂缝切口形式对楔入劈拉试件断裂韧度的影响。试验结果表明:采用V型切口的试件断裂韧度最大,锯缝切口的试件次之,方形切口预埋缝试件断裂韧度最小,预埋钢片不取出的试件断裂韧度无明显规律性。几种预制裂缝切口形式下的楔入劈拉试件断裂韧度测试中,采用尖端V型的钢片预制裂缝效果较好。The wedge splitting test for four different incision shapes of prefabricated crack of plain concrete and roller compacted concrete spec-imens was carried out and fracture toughness were obtained.The effect of incision shapes of prefabricated crack on fracture toughness were com-pared on the analysis of tests results.It indicates that fracture toughness of V-shaped incision specimens is the maximum and those sawed is a little smaller than V-shaped incision specimens and those of rectangle shaped incision specimens is the minimum,but those embedded steel plate has no rule obviously.V-shaped incision prefabricated crack is preferable when the wedge splitting test is required.

关 键 词：普通混凝土 碾压混凝土 断裂韧度 楔入劈拉试验 预制裂缝切口形式 

分 类 号：TU528.01[建筑科学—建筑技术科学]