项目名称: 基于压磁理论的钢筋混凝土结构疲劳损伤机理与寿命预测方法
项目编号: No.51278459
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 建筑科学
项目作者: 金伟良
作者单位: 浙江大学
项目金额: 85万元
中文摘要: 钢筋混凝土结构疲劳性能取决于钢筋、混凝土以及钢筋混凝土界面的疲劳性能,在反复作用下,构件各组成受力复杂,疲劳寿命离散性大。钢筋混凝土构件疲劳损伤力学分析存在诸多涉及基础力学的问题亟待解决。本项目以钢筋的压磁效应作为研究切入口,运用材料科学、结构工程和力学学科等的交叉领域理论,重新探索钢筋混凝土结构的疲劳特性,建立材料疲劳试验新方法。从材料层次研究钢材疲劳压磁效应和钢筋疲劳损伤压磁效应的特性,建立钢筋疲劳损伤失效模式和失效准则;从构件层次研究钢筋混凝土界面动粘结特性、钢筋混凝土构件疲劳失效模式和疲劳失效极限状态;采用钢筋混凝土疲劳力学不确定分析方法,建立合理有效的钢筋混凝土结构疲劳失效预测和力学分析设计方法,这对钢筋混凝土结构疲劳力学分析方法研究有重要意义
中文关键词: 钢筋混凝土结构;疲劳损伤;压磁效应;寿命预测;
英文摘要: The fatigue property of reinforced concrete structure uder repetitive loading cycles is usually attributed to the property of steel bar, concrete and interface of both. The fatigue life of menbers is usually discrete for their complicated stress. There are many problems demanding prompt solution in fatigue damage mechanical analysis of reinforced concrete members. This project taks piezomagnetism of steel bar as the main branch, uses materials science, structure engineering, mechanics and their crosing domain theory, and renews research on fatigue property of reinforced concrte. On the material level, it wants to rebuild failure mode and failure criterion of steel bar from study on fatigue piezomagnetism. On member's level, dynamic donding characteristic on interface and failure mode and failure criterion of reinfoced concrete will also be researched. Using uncertainty analysis method, building a rational and effective predition and mechanism design method on reinforced concrete structure, will take great significance on fatigue mechanical analysis method research.
英文关键词: reinforced concrete structure;fatigue damage;Piezomagnetism;life prediction;