项目名称: FRP加固钢筋混凝土柱受压性能的尺寸效应研究及工程应用
项目编号: No.51308028
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 建筑科学
项目作者: 王作虎
作者单位: 北京建筑大学
项目金额: 25万元
中文摘要: 纤维增强复合材料(简称FRP)是一种新型的修复补强材料,具有轻质、高强、耐疲劳、耐腐蚀及耐久性好、施工方便以及不增加构件截面尺寸等优点,因此被广泛地应用于结构的修复与加固实践,尤其在加固钢筋混凝土柱和桥墩方面。由于受到试验设备加载能力等研究条件的限制,目前FRP加固钢筋混凝土柱的破坏机理研究主要都是基于小尺寸试件的破坏试验,其研究成果对现代大型土木工程常用的大尺寸构件是否适用还没有得到验证。另外,对于普通混凝土的尺寸效应问题,目前有许多成熟的理论,但是对于FRP加固钢筋混凝土结构的尺寸效应问题,研究成果相对较少。因此,开展FRP加固钢筋混凝土柱的破坏机理,特别是大尺寸构件破坏机理的研究,对充分把握FRP加固混凝土结构的性能,建立覆盖大尺寸的考虑尺寸效应的FRP加固混凝土结构设计理论与方法,提高大尺寸FRP混凝土结构的设计科学性和合理性尤为重要。
中文关键词: 纤维增强复合材料;尺寸效应;受压性能;偏压性能;钢筋混凝土柱
英文摘要: Fiber Reinforced Polymer (FRP) is a new type of repair and reinforcement material, with light weight, high strength, fatigue resistance, corrosion resistance and durability, and construction is simple and does not increase the member section sizes, etc., which is widely used in structural repair and reinforcement practice, especially in the reinforcement column and pier side. Due to research limitations, such as the loading capacity of test equipment, the failure mechanism of FRP strengthened concrete structure design mainly is based on small size destructive test, whither it is scientific and rational to be used for large-size component in modern large-scale civil engineering haven't been verified. In addition, there are lots of mature size effect theories for ordinary concrete, but the research of size effect for FRP strengthened concrete structure is relatively few. Therefore, it is particularly important to carry out the failure mechanism studies of large-size components in order to understand the performance of FRP reinforced concrete structures and establish scientific and rational design theory and method considering size effect.
英文关键词: FRP;size effect;compressive behavior;eccentric compressive behavior;reinforced concrete column