Experimental Study on Flexural Behaviour of Circular Concrete-Filled FRP-PVC Tubular Members  

作　　者：MA Shenglan LIN Quan JIANG Shaofei 

机构地区：[1]College of Civil Engineering, Fuzhou University, Fuzhou, China, 350108

出　　处：《沈阳建筑大学学报（自然科学版）》2012年第6期988-996,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51278127);福建省杰出青年基金项目(2009J06027);国家十二五科技支撑计划项目(2012BAJ14B05)

摘　　要：An experimental investigation was conducted on the flexural behavior of FRP-PVC confined concrete circular tubular members.A total of six specimens were prepared and tested under flexural loading.The main parameters varied in the tests were the layer of FRP and the strengthening approach of BFRP and CFRP.The failure modes,ultimate bending capacity and stress-strain relation curves were investigated in details.Furthermore,the relation model of moment(M)-curvature(φ)was studied,and on the basis of M-φ relation model,a simplified formula was presented to compute the ultimate bending moment capacity.The results show that the external confinement of concrete specimens by FRP-PVC tubes results in enhancing the ultimate bending strength and ultimate deformation,and the ultimate bending capacity increased with the FRP layers.Simultaneously,the reinforcement effect in CFRP is better than that in BFRP.The ultimate bending moment capacity values predicted by the presented formula agree well with the experimental results,which imply that the presented formula is applicable and efficient for prediction of the ultimate bending moment capacity as well.An experimental investigation was conducted on the flexural behavior of FRP-PVC confined concrete circular tubular members.A total of six specimens were prepared and tested under flexural loading.The main parameters varied in the tests were the layer of FRP and the strengthening approach of BFRP and CFRP.The failure modes,ultimate bending capacity and stress-strain relation curves were investigated in details.Furthermore,the relation model of moment（M）-curvature（φ）was studied,and on the basis of M-φ relation model,a simplified formula was presented to compute the ultimate bending moment capacity.The results show that the external confinement of concrete specimens by FRP-PVC tubes results in enhancing the ultimate bending strength and ultimate deformation,and the ultimate bending capacity increased with the FRP layers.Simultaneously,the reinforcement effect in CFRP is better than that in BFRP.The ultimate bending moment capacity values predicted by the presented formula agree well with the experimental results,which imply that the presented formula is applicable and efficient for prediction of the ultimate bending moment capacity as well.

关 键 词：FRP-PVC tubes flexural loading ultimate bending moment capacity the section flexural coefficient 

分 类 号：TU398.9[建筑科学—结构工程] TU377.91