Effect of Interfacial Strength on the Flexural Behavior of Glass Fiber Reinforced Polymer(GFRP) Reinforced Concrete Beam  

作　　者：张亚芳 YANG Wenlong LIU Hao CHEN Peiran LIU Feng 

机构地区：[1]Faculty of Civil Engineering, Guangzhou University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2015年第5期1001-1007,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(NSFC)(No.51278136);Yangcheng Scholars Research Fund for Guangzhou Municipal Universities(No.12A007G)

摘　　要：The reinforcement/matrix interfacial strength has been considered as the key factor when glass fiber reinforced polymer(GFRP) bar is mixed with concrete. In this paper, based on micromechanics, fourpoint bending numerical models with and without glass fiber of different interfacial strength have been set up to simulate the damage process of GFRP reinforced concrete beam. The results show that the higher the interfacial strength is, the higher the ultimate bearing capacity of beams, and the less the opening width and height of cracks will be reached. Furthermore, mixing of glass fibers has less influence on the damage process when the interfacial strength is weak, however, it can help to improve the ultimate bearing capacity of the beams, retard the expansion of cracks and improve the toughness when the interfacial strength is high.The reinforcement/matrix interfacial strength has been considered as the key factor when glass fiber reinforced polymer(GFRP) bar is mixed with concrete. In this paper, based on micromechanics, fourpoint bending numerical models with and without glass fiber of different interfacial strength have been set up to simulate the damage process of GFRP reinforced concrete beam. The results show that the higher the interfacial strength is, the higher the ultimate bearing capacity of beams, and the less the opening width and height of cracks will be reached. Furthermore, mixing of glass fibers has less influence on the damage process when the interfacial strength is weak, however, it can help to improve the ultimate bearing capacity of the beams, retard the expansion of cracks and improve the toughness when the interfacial strength is high.

关 键 词：interfacial strength GFRP damage process DEBONDING numerical simulation 

分 类 号：TU375.1[建筑科学—结构工程]