海洋环境下FRP型材-混凝土组合界面受力性能及其劣化机理

项目名称： 海洋环境下FRP型材-混凝土组合界面受力性能及其劣化机理

项目编号： No.51508519

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 建筑科学

项目作者： 张普

作者单位： 郑州大学

项目金额： 21万元

中文摘要： 本项目系统研究海洋环境下FRP型材-混凝土组合界面（以下简称组合界面）的受力性能及其劣化机理。首先通过开展组合界面在湿热、海水浸泡等海洋环境因素影响下粘结性能的拉伸双面剪切试验研究，分析其破坏模式和失效机理，揭示界面粘结性能的退化规律及其劣化机理，建立考虑海洋环境因素影响的界面粘结滑移本构模型和承载力计算模型。其次，通过组合界面在湿热、海水浸泡等环境因素与恒荷载共同作用下粘结性能的拉伸双面剪切试验研究，分析界面粘结性能随恒荷载和侵蚀龄期等因素的变化规律，建立考虑环境因素和恒载共同作用影响的界面粘结滑移本构模型和承载力计算模型。最后，通过开展组合界面在湿热、海水浸泡等海洋环境因素与疲劳荷载共同作用下粘结性能的试验研究，分析界面粘结性能的退化规律和劣化机理，建立考虑海洋环境因素与疲劳荷载耦合作用影响的界面粘结性能退化模型和耐久性预测模型。研究成果有望为组合界面的设计提供数据支撑和理论依据。

中文关键词： 纤维增强聚合物复合材料；界面粘结；组合结构；本构模型；耐久性

英文摘要： This project aims to study the deterioration of the mechanical properties and the mechanism of the FRP profile-concrete composite interfaces (referred to as the composite interfaces) under the marine environment. Firstly, the double-lap tensile shear tests of the composite interfaces will be carried out to study the bonding properties of the interface under the marine environments such as hygrothermal environment, seawater immersion environment, analysis will be done to prove its failure modes and to analysis the failure mechanisms, based on which the degradation law and the deterioration mechanism of the interfacial bonding properties of the composite interfaces will be revealed, thus the interfacial bond slip model and bearing capacity model under the influence of the marine environments will be established. Secondly, the double-lap tensile shear tests of the composite interfaces will be carried out to study the bonding properties of the interface under the hygrothermal environments and seawater immersion environments coupled with the pre-applied dead load, analysis will be done to reveal the degradation law and the deterioration mechanism of the interfacial bonding properties of the composite interfaces, thus the interfacial bond slip model and bearing capacity model under the coupling influence of the marine environments and the pre-applied dead load will be established. Finally，the double-lap tensile shear tests of the composite interfaces will be carried out to study the interfacial bonding properties of the composite interfaces under the marine environments (such as hygrothermal environments and seawater immersion environments) coupled with the fatigue loading, analysis will be done to reveal the degradation law and the deterioration mechanism of the interfacial bonding properties of the composite interfaces, thus degradation model and the durability prediction model of the composite interfaces under the coupling influence of the marine environments and the fatigue loading will be established. And the research results will provide a theoretical basis for the design of FRP profile-concrete composite structures.

英文关键词： FRP;interface bonding;composite structure;constitutive model;durability