CFRP加固钢筋混凝土梁锚固位置的试验研究  

Experimental Research on Anchorage Position of Reinforced Concrete Beams Strengthened with CFRP

作　　者：尹润平 赤二军 王泽瀚 裴须强 仲从春 YIN Run-ping;CHI Er-jun;WANG Ze-han;PEI Xu-qiang;ZHONG Cong-chun(CNBM Zhongyan Technology Co.,Ltd.,Beijing 100024,China;China Building Materials Academy,Beijing 100024,China;China Energy Engineering Group Jiangsu No.1 Electric Power Construction Co.,Ltd.,Nanjing 210000,China)

机构地区：[1]中建材中岩科技有限公司,北京100024 [2]中国建筑材料科学研究总院,北京100024 [3]中国能源建设集团江苏省电力建设第一工程有限公司,南京210000

出　　处：《硅酸盐通报》2019年第11期3675-3680,3686,共7页Bulletin of the Chinese Ceramic Society

基　　金：国家重点研发计划(2017YFB0310100)

摘　　要：为研究混凝土梁经CFRP加固后界面粘结性能及抗弯承载力,对4根不同锚固位置的试验梁进行加载试验。结果表明:随着锚固点的增加,试件由CFRP剥离破坏转为拉断破坏;端部锚固和中部锚固比未锚固梁极限承载力提高20.83%,延性系数提高36.84%,CFRP极限强度利用率最高达83.4%;经端部锚固后,CFRP应变范围扩大,界面粘结应力比不锚固时提高32.1%,说明端部锚固可有效降低应力集中现象,充分发挥外部加固材料的强度。In order to study the interfacial bonding performance and flexural capacity of concrete beams strengthened by CFRP,four test beams with different anchorage positions were loaded.The results show that with the increase of anchorage point,the specimens change from CFRP peeling failure to pulling failure;the ultimate bearing capacity of end-anchored and middle-anchored beams increases by 20.83%,ductility coefficient increases by 36.84%,and ultimate strength utilization ratio of CFRP reaches 83.4%.After end-anchored,the strain range of CFRP is expanded and the interfacial bond stress increases by 32.1%compared with that without end-anchored beams,indicating that end-anchored beams are effective.Reduce the phenomenon of stress concentration and give full play to the strength of external reinforcement materials.

关 键 词：CFRP 锚固位置 破坏形式 承载力 延性系数 

分 类 号：TU375[建筑科学—结构工程]