BOND BEHAVIOUR OF TWO DIFFERENT SHAPED STEEL FIBER IN ULTRA-HIGH-PERFORMANCE CONCRETE
In this work, the bond behaviors of two different steel fiber in Ultra-High-Performance Concrete (UHPC) by numerical simulation with Finite Element Method (FEM) are investigated.Different silica fume content and different curing time of UHPC are considered.In addition, a revised bilinear-separation constitutive relationship was proposed to analyze the bonding behavior between fiber and matrix.According to the results of the experiment and numerical simulation, the pullout load of the straight fiber continues to decrease after reaching the peak value, different from that, the pullout load of the hooked fiber presents a stable platform stage with the displacement increases.The results of numerical simulation suggested that hooked fiber needs more bond energy to be pullout than straight fiber.In addition, hooked fiber will be straightened after being pulled out completely.The peak-load of debonding of different fiber had been deeply affected by the content of silica fume at different curing time.
Bond behavior Ultra-High-Performance Concrete Finite element method Hooked fiber Corrugated fiber Straight fiber
Chaohui Zhang Caijun Shi Zeimei Wu
Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and
国际会议
福州
英文
386-393
2018-11-07（万方平台首次上网日期，不代表论文的发表时间）