带剪力键钢板-高强灌浆体的抗剪承载力  

Shear capacity of composite member of high strength grouted cement paste and steel plate with shear keys

作　　者：王国庆[1,2] 程壮[1] 王振宇[1] 陈枫[1] 张毅[1] 

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058 [2]浙江省能源局,浙江杭州310025

出　　处：《浙江大学学报（工学版）》2015年第7期1282-1287,1304,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51179171;51079127;51279180);国家"973"重点基础研究发展规划资助项目(2013CB035901)

摘　　要：为了研究灌浆套管连接中带剪力键钢板-高强灌浆体的抗剪承载力性能,开展不同初始正应力下4个试件的平板剪切试验.通过试验发现,试件的承载过程包括弹性、灌浆体开裂和界面摩擦滑移3个阶段,灌浆体主要是沿着剪力键之间的连线逐次开裂发展,初始正应力越大,试件的峰值抗剪强度越大.采用脆性开裂模型对试件剪切过程进行数值模拟,计算得到的破坏形态和承载过程曲线与试验结果基本相同.Composite member of high strength grouted cement paste and steel plate with shear keys,as a part of grouted tubular connection,was investigated with regards to its shear capacity characteristics by shear tests on four specimens subjected to different initial normal stress.The test results demonstrate that loading process curve of specimens includes three stages,namely elastic stage,cement paste cracking stage and interface friction slipping stage.Grouted cement paste mainly cracks through lines joining shear keys of two steel plates successively.Specimen subjected to larger initial normal stress generally shows higher peak strength.Shearing process of the specimens was numerically simulated using the brittle cracking model.Failure mode and loading process curve of specimens derived from numerically modeling were basically consistent with those acquired from tests.

关 键 词：剪力键 钢板 灌浆体 抗剪强度 剪切试验 脆性开裂 

分 类 号：TU398[建筑科学—结构工程]