摘要
利用ABAQUS对表层嵌贴(NSM)FRP板条加固的钢筋混凝土梁进行有限元模拟,提出考虑FRP-混凝土界面破坏的加固梁的模拟方法,即在界面上运用弹簧单元模拟FRP-混凝土的粘结-滑移关系,研究界面粘结-滑移性能对表层嵌贴FRP加固混凝土梁抗弯性能的影响。结果表明:FRP-混凝土界面的粘结滑移对NSM FRP加固梁的抗弯性能有较大影响,必须加以考虑。模拟时,在FRP-混凝土界面间用非线性弹簧连接可以较好地模拟出界面破坏,在研究加固梁在正常使用极限状态下的各项性能时,使用线性弹簧连接进行表层嵌贴FRP加固梁的模拟更加便捷且不失精度。
The concrete beam strengthened with near-surface mounted FRP strips(NSM-FRP strips)is simulated by finite element method using ABAQUS software,and the simulation method of reinforced beam considering the interface failure of FRP-concrete is proposed.In order to study the effect of interface bonding-slip performance on the bending behavior of the concrete beam strengthened with NSM-FRP strips,the spring2 nonlinear elements is used to simulate the bond-slip relationship of FRP-concrete interface.The flexural behavior of RC beams under different interface bonding relationships was recorded and compared.The results show that the bond slip of the FRP-concrete interface has a great influence on the bending resistance of the beam strengthened with NSM FRP and must be considered.The nonlinear spring connection between the interfaces can do a better job in simulating the bond-slip failure of the interface.When studying the performance of the reinforced beam under serviceability limit state,it is more convenient and accurate to use the linear spring connection to simulate the NSM FRP strengthened beam.
作者
张智梅
黄庆彬
赵雷
ZHANG Zhi-mei;HUANG Qing-bin;ZHAO Lei(Department of Civil Engineering,Shanghai University,Shanghai 200444,China)
出处
《玻璃钢／复合材料》
CAS
北大核心
2019年第10期40-45,共6页
Fiber Reinforced Plastics/Composites
