摘要
为研究装配整体式超高性能混凝土(Ultra-High Performance Concrete, UHPC)-普通混凝土(Normal Concrete, NC)组合框架的抗震性能,对2榀1/2缩尺的三层两跨框架结构进行了拟静力试验.1榀为装配整体式UHPC-NC组合框架(Precast Concrete Frame, PCF),1榀为全现浇混凝土框架(Reinforced Concrete Frame, RCF).UHPC-NC组合框架采用预制柱、预制U形UHPC梁外壳后浇NC梁芯的叠合梁和节点后浇UHPC制成.研究结果表明:两个框架具有基本相同的破坏过程,PCF的损伤较RCF轻,整体性更好;两个框架的滞回曲线饱满,与RCF相比,PCF的承载能力更高,提高了约16%,PCF的耗能能力高于RCF;PCF的刚度略高,刚度退化稍慢;两个框架的位移延性系数均为3.9~4.6,PCF的位移延性系数更大.装配整体式UHPC-NC组合框架结构的抗震性能优于全现浇框架结构的抗震性能.
The seismic performance of monolithic precast Ultra-High Performance Concrete(UHPC)-Normal Concrete(NC)composite frame was evaluated using quasi-static tests on two 1/2 scaled three-story,two-span frames.The frames included one fully cast-in-place reinforced concrete frame(RCF)and one monolithic precast UHPC-NC composite conctete frame(PCF).The UHPC-NC composite frame consisted of precast columns,composite beams constructed with a precast U-shaped UHPC beam shell and a post-cast NC beam core,and beam-column joints made of post-cast UHPC.The results show that:the damage process of both frames is essentially the same,but the PCF has less damage and better integrity compared to the RCF.The hysteresis curves of both frames are plump.The load-carrying capacity of the PCF is enhanced by 16%compared to that of the RCF.The PCF has a higher energy dissipation capacity than the RCF.The stiffness of the PCF is slightly higher and degrades slower than that of the RCF.The displacement ductility coefficients range from 3.9 to 4.6 for both frames,with the PCF having slightly higher ductility coefficients than the RCF.The seismic performance of the monolithic precast UHPC-NC composite frame structure is superior to that of the fully cast-in-place frame structure.
作者
张晓磊
王伯昕
鞠彦忠
王德弘
韩永鸣
宋一峰
ZHANG Xiaolei;WANG Boxin;JU Yanzhong;WANG Dehong;HAN Yongming;SONG Yifeng(College of Construction Engineering,Jilin University,Changchun 130021,China;School of Civil Engineering and Architecture,Northeast Electric Power University,Jilin 132012,China)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2024年第2期514-526,共13页
Journal of Basic Science and Engineering
基金
国家自然科学基金项目(51878128,42072296)。
作者简介
张晓磊(1987-),女,博士研究生,讲师.E-mail:xiaolei_052@sina.com;通信作者:鞠彦忠(1963-),男,博士,教授,博士生导师.E-mail:juyanzhong@126.com。
