摘要
为验证碳纤维布加固震损型钢混凝土框架节点的可行性和有效性,基于现行规范,按1:2比例缩尺设计并制作了4个型钢混凝土框架节点试件。其中1个对试件,1个直接采用碳纤维布加固试件,2个模拟不同地震损伤后采用碳纤维布加固修复试件,对其进行低周往复荷载破坏试验。试验结果表明,碳纤维布提高了试件的极限承载力、极限位移和延性系数;与对比试件比较,直接采用碳纤维布加固试件分别提高了19. 4%、13. 5%、28. 1%;中度损伤试件提高了17. 0%、25. 8%、21. 8%;重度损伤试件提高了13. 9%、19. 6%、6. 3%。在一定损伤程度下,碳纤维布加固能恢复并超过节点受损前的抗震性能。
In order to verify the feasibility and effectiveness of CFRP in strengthening the damaged SRC joints,four models of SRC joints are designed and fabricated on a scale of 1: 2 based on the current codes. One model are prototype control specimen,one are strengthened by CFRP,and the others are pre-damage and strengthened. The low cycle reciprocating load failure experiment is conducted. The results show that the CFRP increases the ultimate bearing capacity,the ultimate displacement and the ductility coefficient of the specimens. Compared with the control specimens,the specimens directly reinforced by CFRP increase by 19. 4%,13. 5% and 28. 1% respectively;the moderately damaged specimen after are increased by 17. 0%,25. 8% and 21. 8% respectively;the severely damaged specimen after retrofit are increased by 13. 9%,19. 6% and 6. 3% respectively. The study indicates that the rehabilitated joints can reach or even exceed the level of their original seismic preformances befor seismic damage in a certain extent of damage level.
作者
许成祥
王辰飞
马作涛
杨曌
Xu Chen-xiang;Wang Chen-fei;Ma Zuo-tao;Yang Zhao(School of Urban Construction,Wuhan University of Science and Technology,Wuhan 430065,China)
出处
《工程抗震与加固改造》
北大核心
2018年第5期110-116,130,共8页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金(51478048)
湖北省自然科学基金(创新群体)资助项目(2015CFA029)
关键词
型钢混凝土框架节点
碳纤维布加固
地震损伤
抗震性能
steel reinforced concrete frame joint
carbon fiber reinforced polymer strengthening
seismic damage
seismic behavior
