FRP在混凝土重力坝抗震加固中的应用研究  

Study on application of FRP to anti-seismic reinforcement of concrete gravity dams

作　　者：王娜丽[1] 钟红[1] 林皋[1] 

机构地区：[1]大连理工大学工程抗震研究所,辽宁大连116024

出　　处：《水力发电学报》2012年第6期186-191,共6页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(90510018;90915009;51009019);清华大学水沙科学与水利水电工程国家重点实验室开放基金(sklhse-2010-C-03);高等学校博士点基金(200801411099)

摘　　要：传统方法采用钢筋作为混凝土重力坝的抗震加固措施,但钢筋锈蚀问题一直不能很好地解决。FRP(FiberReinforced Polymer)与钢筋力学性质相近但具有优于钢筋的特点,能否替代钢筋进行抗震加固成为思考的重点。基于考虑材料细观非均匀性的混凝土损伤模型和FRP的单向抗拉特点进行FRP板表面加固和FRP筋内插加固两种方法下的混凝土重力坝的地震响应数值模拟,以Koyna大坝为例进行地震损伤时程分析,对比加固前后及两种不同加固方法下大坝的损伤发展过程、最终破坏形态、坝顶结点位移时程和加速度时程。结果表明:FRP用于大坝抗震加固是有效的,两种FRP加固措施能够起到不同程度的加固作用,可以根据大坝的具体情况选择合适方案作为大坝的安全储备,优先考虑FRP板加固。Steel is a traditional material for reinforcement of concrete gravity dam,but its corrosion is a serious problem.Fiber reinforced polymer（FRP） shows many positive properties relative to steel material,and has a great potential for dam reinforcement.This paper explores application of FRP plate and FRP bar to the reinforcement of Koyna dam,through simulation of nonlinear seismic response,consideration of concrete heterogeneity influenced by enforcement,and analysis of damage time histories.Damage processes,final failure forms,displacements and accelerations of top node under FRP reinforcement are compared with the case of no reinforcement.The results show that FRP plate and FRP bar play a significant role in strengthening concrete gravity dam,but with different strengthening effects.This study suggests that proper reinforcement measure should be taken according to conditions of dams,and generally FRP plate reinforcement is superior.

关 键 词：水工结构 抗震加固 地震损伤破坏模拟 混凝土重力坝 FRP板 FRP筋 

分 类 号：TV312[水利工程—水工结构工程] TU599[建筑科学—建筑技术科学]