多因素影响下FRP约束混凝土柱FRP有效极限拉应变研究进展  

REVIEW ON THE EFFECTIVE ULTIMATE TENSILE STRAIN OF FRP FOR FRP-CONFINED CONCRETE COLUMNS UNDER VARIOUS FACTORS

作　　者：欧阳利军[1] 许峰 

机构地区：[1]上海理工大学环境与建筑学院,上海200093

出　　处：《玻璃钢／复合材料》2017年第10期94-103,共10页Fiber Reinforced Plastics/Composites

基　　金：国家自然科学基金项目(51708349);国家自然科学基金项目(11672185);浙江省自然科学基金项目(LY13E080020)

摘　　要：FRP侧向约束作用使混凝土柱处于三向受压状态,可提高混凝土柱的抗压强度和延性。FRP有效极限拉应变是确定FRP侧向约束力的关键参数,对FRP约束混凝土轴压峰值应力和峰值应变计算模型、应力-应变模型的建立至关重要,其影响因素众多。目前国内外研究者在FRP有效极限拉应变取值方面取得了一些有价值的研究成果,但得到的FRP有效应变系数离散性较大,考虑的影响因素不全面。基于现有研究成果,对FRP有效极限拉应变的影响因素进行了系统分析,指出了当前FRP有效极限拉应变研究存在的不足和未来需深入研究的方向。FRP confinement effects make concrete columns under the statement of triaxial compression,which improves the compressive strength and ductility of concrete columns. Effective ultimate tensile strain of FRP is essential for calculating the lateral restraint force,proposing peak stress models,peak strain models and stress-strain models of confined columns. In addition,the influence parameters are various. Researchers have obtained some meaningful but discrete and limited results on the effective ultimate tensile strain of FRP. In this paper,systematic analysis was conducted on various influence parameters based on the existing research results,and the remaining problems and key issues which need to be focused in future are pointed out.

关 键 词：FRP 混凝土 侧向约束 有效极限拉应变 

分 类 号：TB332[一般工业技术—材料科学与工程]