Flexural behavior of UHPCbeam reinforced with steel-FRP composite bars

Case Studies in Construction Materials

Zhongping Yang¹  Rong Tang²  Zhiwen Zhang³  Wenjie Ge³  Ebrahim M.A. Abbas³  Ebrahim Y. Khailah³  Yiwen Chen³  Chuanzhi Sun⁴  Yue Ge⁴  Shan Yao⁵  Ashraf Ashour⁶ 

[1] Corresponding author at: College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China.;Jiangsu Province Engineering Research Center of Prefabricated Building and Intelligent Construction, Suqian 223800, China;College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China;College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China;Gansu Engineering Design Research Institute Co., LTD., Lanzhou 730030, China;School of Engineering, University of Bradford, Bradford BD7 1DP, UK;

关键词: Ultra-high performance concrete;    Steel-FRP composite bar;    Concrete beam;    Flexural behavior;   

DOI  :  

来源: DOAJ

【 摘 要 】

This paper numerically investigates flexural performance of Ultra-High Performance Concrete (UHPC) beam reinforced with Steel-Fibre-Reinforced Polymer (FRP) Composite Bars (SFCBs) in terms of flexural stiffness, moment capacity, deflection, ductility and energy dissipation. The effect of various parameters, include the inner steel core area ratio of SFCB, yield strength of inner steel core, elastic modulus and ultimate strength of outer-wrapped FRP, reinforcement ratio, type and strength of concrete were studied. The results demonstrate that the inner steel core area ratio of SFCB, reinforcement ratio and the elastic modulus of SFCB's outer FRP have significant effect on the overall flexural performance of SFCB reinforced UHPC beam. The overall flexural performance of SFCB reinforced UHPC beam is slightly improved by increasing the yield strength of inner steel core of SFCB, but not affected by the ultimate strength of SFCB's outer FRP when specimen occurred compression failure. The results also exhibit that the flexural performance of UHPC beam reinforced with SFCBs is significantly improved when compared to those of reinforced high strength concrete (HSC) beam and normal strength concrete (NSC) beam. The flexural stiffness and the moment capacity of SFCB reinforced UHPC beam at the ultimate point were 2.0 and 2.4 times, respectively, of those of reinforced NSC counterpart.

【 授权许可】

Unknown