钢筋混凝土锈裂全过程多尺度分析与原位动态监测

项目名称： 钢筋混凝土锈裂全过程多尺度分析与原位动态监测

项目编号： No.51478419

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 建筑科学

项目作者： 金贤玉

作者单位： 浙江大学

项目金额： 90万元

中文摘要： 本项目拟针对不同环境与受荷条件下进行钢筋锈胀引起的混凝土开裂全过程理论分析与试验研究。项目拟采用先进的测试技术、数值仿真、理论研究、实验室试验及暴露现场试验相结合，研究多因素耦合作用下混凝土中侵蚀介质的输运机制，获得钢筋混凝土锈胀开裂全过程真实的微细观结构特征与时变特性，揭示混凝土的微细观结构特征对钢筋的锈蚀过程及状态的影响，通过多尺度过渡，对钢筋混凝土的锈胀开裂全过程及开裂模式的分析，系统深入地开展荷载与复杂环境耦合作用下由于锈胀开裂引起的混凝土结构性能损伤与退化规律研究，建立完整的钢筋混凝土锈胀开裂全过程多尺度分析模型，采用原位动态测试技术，实时监测钢筋混凝土结构锈胀力变化及锈裂全过程，提出锈裂关键参数及敏感性、控制与评定方法，预测钢筋起锈时刻与锈蚀发展时变规律，形成较为成熟的可为工程应用的理论模型及技术规程，为大型钢筋混凝土结构工程的耐久性设计、施工、维护提供科学依据。

中文关键词： 钢筋混凝土；微细观结构；锈裂；多尺度；原位动态监测

英文摘要： This project aims at conducting a series of theoretical analysis and experimental research on the whole cracking process of concrete induced by reforcement corrosion under various environmental and loading conditions. By combining the advanced measuring technology, numerical simulation, theoretical investigation, laboratory test and field exposure experiment, this project plans to study the transporting mechanism of the invasion medium in concrete under multiple-factor coupling conditions, and represent the micro- and meso- structural characteristics of reinforced concrete during the whole corrosion process and its time-denpendent properties. In order to reveal the influence of micro- and meso- structure of concrete on the corrosion process and state of reinforcement, this project will analyze the whole cracking process and cracking patten of reinforced concrete through multiscale methods. Furthermore, in this project, the damage accumulation and performance degeneration of reinforced concrete due to corrosion cracking will be systematically investigated in considering the coupling effect of loading and complicated environments. An intergrated multi-scale model in analyzing the whole corrosion and cracking process of reinforced concrete will be established based on a real-time inspection on the development of corrosion force and corrosion process of reinforced concrete with an in-situ dynamic monitoring technology. In this project, the sensitivity, control and evaluation of the key paramters associated with reinforcement corrosion will be proposed to predict the starting moment and development principle of reinforcement corrosion. This project will conform the theoretical model and technical schedule to engineering application, and provide scientific directions for the design, construction and maintenance of the key reinforced concrete structures.

英文关键词： Reinforced concrete;micro-and meso-structure;corrosion cracking;multiscale;in-situ dynamic monitoring