FRP加强修复金属结构研究概述

近年来,FRP(Fibre Reinforced Polymer)用于加强修复钢结构及铝合金结构取得了较多应用。本文首先总结回顾了钢结构、混凝土结构与FRP粘贴连接节点界面应力的弹性分析方法,然后总结了考虑胶水塑性变形的粘结-滑移分析及不同的强度设计准则。文中还总结了不同受力形式下,钢或铝合金与FRP组合结构构件的受力性能,包括受拉、受弯、受压等工况。已有的试验及有限元方法主要分析了FRP和胶水的材料性质、FRP粘贴位置和范围、胶水层厚度等因素对组合构件的强度和破坏模式的影响,并依据试验结果和理论分析,提出了有效粘贴长度的概念。简要回顾了FRP加固后钢结构或铝合金结构的疲劳性能,以及航空领域和相关领域的研究情况。最后提出了FRP用于加固金属结构的几点待研究或完善的问题。

State of the Art on FRP Strengthened Metal Structures

The use of FRP （ Fibre Reinforced Polymer ） to strengthen metal structures has been very popular. This paper first reviews the following areas： the elastic analysis of interfacial stresses for the design of FRP bonded to a structural member, the bond-slip relationship between FRP and metal or concrete, and several approaches to predict the bond strength. Then summarize the structural behavior of FRP-metal under axial loads （tension force and compression forces） or bending, review these factors that influence the structural behavior： the choice of different FRP or different adhesive, the location and direction of FRP, the layer and boundary of FRP, the thickness of adhesive, etc. This paper also mentions the conception of effective bond length. Then it reviews the fatigue behavior of steel or aluminum structures strengthened with FRP. Besides, several issues need to be resolved for further study.