N式砌块砌体受剪性能试验研究  

Research on the Shear-resistance Behaviors of N-type Block Masonry

作　　者：黄靓[1] 高翔[1] 陈良[1] 陈胜云[1] 王珂[1] 吴昊[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2010年第2期14-17,共4页Journal of Hunan University:Natural Sciences

基　　金：国家985工程资助项目(521805020003);湖南省建设科技项目(2007-23)

摘　　要：对30个N式砌块砌体抗剪试件（其中未灌孔试件6个，灌孔试件24个）进行了受剪力学性能试验研究，了解了N式砌块砌体的破坏形态及破坏机理．试验结果表明，灌孔N式砌块砌体的受剪开裂荷载与极限荷载的比值随灌孔率的不同分别为：半灌孔试件77％～82％、全灌孔试件54％～59％．随着灌孔混凝土面积的增大，N式砌块砌体表现出越来越好的延性．未灌孔N式砌块砌体的抗剪强度平均值比砌体规范抗剪平均强度公式计算值高出11％，半灌孔N式砌块砌体的抗剪强度平均值比砌体规范平均强度计算值高出5％，全灌孔N式砌块砌体的抗剪强度平均值比砌体规范平均强度计算值高出74％～106％．30 specimens of N-type block masonries with different grouted rates were investigated for the performance of shear resistance. According to the shear-test phenomena and failure shape of specimens, the ratios of the shear-resistance crack load and the ultimate load of grouted N-type block masonry which changed with the grouted rates,were 77%-82% of half-grouted and 54%-59% of full-grouted. It has been found that the N-type block masonry shows better ductility with the increase of the grouted areas. The average value of the shear strength of ungrouted N-type block masonry was 11% higher than the average strength calculation value of the masonry norm. The average value of the shear strength of half-grouted N-type block masonry was 5 % higher than the average strength calculation value of the masonry norm, and the average value of the shear strength of full-grouted N-type block masonry was 74%-106% higher than the average strength calculation value of the masonry norm .

关 键 词：破坏机理 N式砌块 灌孔率 抗剪强度 

分 类 号：TU365[建筑科学—结构工程]