Theoretical study on axial capacity of CFRP reinforced self-stressing concrete filled steel tubes
Since the expansion of the cement during curing was constraint by the steel tube,the concrete core in the self-stressing concrete-filled steel tubes (SSCFST) is under tri-axially compression before applying load,which increases the axial capacity of the SSCFST.In addition,Carbon fiber reinforced polymer (CFRP) wrapping can avoid bucking of the steel tube,increase the axial capacity and improve the durability of SSCFST.This study presents a theoretical study on axial capacity of the SSCFST wrapped with CFRP sheets.Several basic assumptions are proposed.The ultimate equilibrium method was employed to analyze the axial capacity,of which two limit states,including steel tube bucking and CFRP sheets rrpturing were considered.The analytical results from an example show that the initial self-stress improves axial capacity of the SSCFST by about 30% and the CFRP reinforcement improves axial capacity by about 15%.
Self-stressing Concrete filled steel tube CFRP Axial capacity Reinforcement
Hui Li Jun Deng Junhong Lin
Faculty of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou510006, China
国际会议
台湾
英文
3025-3029
2011-12-11（万方平台首次上网日期，不代表论文的发表时间）