中国铁道科学2017，Vol.38Issue(5)：30-36,7.DOI:10.3969/j.issn.1001-4632.2017.05.05
有初应力的FRP约束混凝土圆柱应力—应变分析型模型
Analysis-Oriented Stress-Strain Model for FRP Confined Circular Concrete Column with Initial Stress
摘要
Abstract
To accurately simulate the uniaxial compression properties of fiber reinforced polymer (FRP) confined concrete with initial stress,based on 103 test data collected and by introducing the influence factor of initial stress level,formulas were proposed for calculating the peak stress and peak strain of FRP confined circular concrete column considering initial stress.The three-line formula was also presented for reflecting the axial-lateral strain relationship.Then,based on the active constraint equations of Mander's constitutive model,an analysis-oriented stress-strain model for FRP confined circular concrete column with initial stress was established.The calculated results and test results of the analysis-oriented model and the existing models were compared.Results show that the calculated stress-strain curves obtained by the analysis model are generally in consistence with experimental curves,with less than 20 percent deviation between the calculated peak stress and peak strain values and the test values,better than some existing models.关键词
纤维增强复合材料/约束混凝土/圆柱/初应力/应力—应变关系/分析型模型Key words
Fiber reinforced polymer/Confined concrete/Circular column/Initial stress/Stress-strain relationship/Analysis-oriented model分类
交通工程引用本文复制引用
潘毅,吴晓飞,郭瑞,蔡联亨..有初应力的FRP约束混凝土圆柱应力—应变分析型模型[J].中国铁道科学,2017,38(5):30-36,7.基金项目
国家自然科学基金资助项目(51108389) （51108389）
国家重点研发计划项目(2016YFB0303603-4) （2016YFB0303603-4）
