论文部分内容阅读
纤维增强复合材料FRP(Fiber Reinforced Polymer)已广泛应用于混凝土及其它结构的加固。从上世纪90年代初到现在,这项技术主要应用于结构抵抗静载、疲劳荷载和地震荷载的加固中,最新的研究开始涉及用外贴FRP加固技术增强结构抵抗爆炸和冲击荷载的能力。FRP与混凝土粘结界面是FRP加固混凝土结构中的薄弱环节。由FRP混凝土界面的粘结强度所决定的FRP有效应力是评价不同荷载条件下FRP加固效果的关键指标。本文对目前已有静/动态荷载条件下的FRP混凝土界面模型及其在数值分析中的应用进行了分类和总结。
Fiber Reinforced Polymer FRP (Fiber Reinforced Polymer) has been widely used in the reinforcement of concrete and other structures. From the early 1990’s to the present, the technology is mainly applied to the reinforcement of structure against static load, fatigue load and seismic load. The latest research involves the reinforcement of the structure against explosions and impact loads with external FRP reinforcement technology. FRP and concrete bonding interface is the weak link in FRP reinforced concrete structure. The effective stress of FRP, which is determined by the bond strength of the FRP concrete interface, is a key index to evaluate the reinforcement effect of FRP under different load conditions. In this paper, the existing FRP concrete interface model under static / dynamic load conditions and its application in numerical analysis are classified and summarized.