海洋环境下FRP增强混凝土构件结构劣化和性能退化的研究综述

Review on the Deterioration of FRP Reinforced Concrete Structures Subjected to Marine Environment

随着我国海洋工程的快速发展,海洋环境下混凝土结构内部钢筋锈蚀导致的钢筋混凝土性能降低和结构破坏等问题越来越凸显。基于轻质、高强、耐腐蚀等性能特点,采用纤维增强复合材料(Fiber reinforced polymer,FRP)与混凝土的组合结构被认为是海洋工程建设中的优异选择。本文介绍了不同海洋腐蚀环境如水或碱性溶液浸泡、紫外线辐射等作用下FRP的降解机理,以及FRP的拉伸、弯曲、剪切、压缩强度等力学性能的退化规律。同时,综述了FRP-混凝土界面性能劣化机理及其对FRP增强混凝土结构性能的影响规律。本文重点讨论海洋环境下FRP增强混凝土结构的界面粘结性能和力学性能,将为海洋环境下纤维增强复合材料性能的研究和工程结构设计提供理论基础和研究方向。

With the rapid development of marine engineering in China,the degradation and destruction of reinforced concrete structures due to the steel corrosion in the marine environment are more and more prominent.Based on the properties of light weight,high strength,and excellent resistance to corrosion,the composite structure of fiber reinforced polymer(FRP)and concrete is considered as a kind of superior materials for marine structure.This paper mainly introduces the deterioration mechanism of FRP in the marine environments including water and alkaline solution immersion,ultraviolet radiation.The mechanical properties of FRP including tensile,bending,shear,and compression strength are introduced.Besides,the deterioration of FRP-concrete interface and its effects on the performance of FRP reinforced concrete structures are reviewed.The interfacial bonding strength and mechanical properties of the composite structure of FRP and concrete in marine environment are emphatically discussed,which can lay a theoretical foundation and provide a research guide for further study and application of composite materials and structure in the marine environment.