项目名称： 钢-连续玄武岩纤维复合筋增强海砂混凝土柱的耐久性能研究

项目编号： No.51508277

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： 丁里宁

作者单位： 南京林业大学

项目金额： 20万元

中文摘要： 本项目针对海砂混凝土中钢筋锈蚀而导致耐久性不足的问题，研究采用具有耐腐蚀性能和高综合力学性能的钢-玄武岩纤维复合筋（SFCB筋）增强海砂混凝土柱的性能评价和耐久性设计方法。项目从SFCB筋的材料，与海砂混凝土粘结界面和增强海砂混凝土柱结构三个层次开展耐久性研究。首先研究SFCB筋在盐环境和碱环境作用下的退化机理和规律，同时研究SFCB筋和海砂混凝土的粘结界面在腐蚀作用下的破坏控制因素和性能退化规律，在此基础上，通过配筋率、箍筋、腐蚀作用方法等参数的综合考虑，研究SFCB筋增强混凝土柱在轴压和偏压作用下的性能退化规律。基于上述三方面研究提出结构在腐蚀环境下性能评价和设计方法。本项目特色在于综合分析影响结构性能的不同层次因素，揭示腐蚀介质对结构的损伤控制因素和机理，并定量评价和提出SFCB筋增强海砂混凝土柱结构的长期耐久性能和设计方法，为高耐久性海洋工程结构提供重要参考。

中文关键词： 钢-连续纤维复合筋；海砂混凝土；耐久性；纤维增强复合材料

英文摘要： Focusing on the durability deficiency of sea sand concrete reinforced by steel bars, a corrosion resistance and high integrated performance steel-basalt fiber composites bars (SFCB) is adopted in current research to enhance the durability of sea sand concrete columns. The research will be conducted from the durability study ofthree perspectives, SFCB material, interface between SFCB and concrete and column structures. First, the degradation of SFCB under salt and alkaline solutions is tested and evaluated, meanwhile, the crtical factors affecting interfacial behavior and degradation are studied. Based on above studies, the durability of sea sand concrete columns with SFCB are studied under the axial and eccentric compression, addressing the influence of reinforcing ratio, stirrups layout and corrosion actions. According to above results, the performance evalatuion and design method for sea sand concrete column will be proposed. The characteristics of the research lies in the intergration of multi level impacts to the durability of structures and the analysis of degradation mechanism, key factors and design method. The research can provide references for marine engineering structures.

英文关键词： SFCB;sea sand concrete;durability;FRP