CFRP端部被锚固后加固钢结构的界面粘结行为  

Interfacial bond behavior of CFRP reinforced steel structures with end anchorage

作　　者：李春良[1] 李凯[1] 张立辉[1] 王静[1] 

机构地区：[1]吉林建筑大学交通科学与工程学院,长春130118

出　　处：《哈尔滨工业大学学报》2016年第9期113-118,共6页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金(51308256);吉林省教育厅"十二五"科技项目(2015265);住房和城乡建设部项目(2011K239)

摘　　要：为明确CFRP锚固端的界面间粘结应力的分布规律,建立CFRP端部被锚固、不被锚固等几种边界条件下的CFRP加固钢板拉伸构件的界面粘结剪应力模型,考察了端部锚固程度对界面粘结剪应力的影响情况.结果表明:CFRP端部不被锚固时其端部处的拉应变为0με,而被锚固以后其端部处的拉应变能达到中部区域CFRP最大拉应变的50%;界面粘结剪应力也比不锚固时的降低了50%.CFRP端部被锚固后有助于CFRRP与钢板协调受力,端部粘结剪应力集中现象被缓解.另外减少CFRP层数、增加胶层粘结厚度会降低粘结界面间的剪应力.In order to clarify the distribution of bond stress of CFRP anchorage end, this paper established these mechanical models to study several boundary conditions of the shear behaviors of CFRP reinforced steel structures with end anchorage or not, investigating the effects of end anchorage level on interracial shear stress. The outcomes indicated that the tensile strain was 0 με if the end of CFRP was unanchored. The tensile strain of the end could reach 50% of the maximum if CFRP was anchored; the interfacial shear stress in the case of end anchorage would decrease by 50% than that unanchored. At the same time the end of CFRP could better coordinate with steel plate, and the shear of interfacial bond stress could be decreased effectively, and then the shear concentration could be eased. In addition, decreasing the number of plies and increasing the adhesive thickness would reduce the shear stress between the bonding interfaces.

关 键 词：CFRP 端部锚固 钢结构 界面粘结应力 力学模型 

分 类 号：TU432[建筑科学—岩土工程]