Analytical Model for FRP Confinement of Concrete Columns with and without Internal Steel Reinforcement
Analytical Model for FRP Confinement of Concrete Columns with and without Internal Steel Reinforcement
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DOI：
10.1061/(asce)cc.1943-5614.0000127
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发表时间：
2010-12
影响因子：
4.6
通讯作者：
Carlo Pellegrino;C. Modena
中科院分区：
文献类型：
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作者：
Carlo Pellegrino;C. Modena
本文旨在对纤维增强聚合物(FRP)布约束钢筋混凝土柱的受力性能有更好的认识。特别是对内部钢筋与外部FRP加固的相互作用机理及其对FRP约束技术效率的影响提出了一些新的见解。在此背景下，提出了一种产生完整应力-应变响应的方法，其中包括新的分析建议：(1)破坏时的有效约束压力；(2)峰值应力；(3)极限应力；(4)极限轴向应变；(5)对应于峰值应力的轴向应变。分析模型考虑了内部钢筋和外部FRP加固之间的相互作用机理，Padova大学的一些试验结果表明，这种相互作用机理得到了准确的测量。四个实验..。
The paper aims to contribute to a better understanding of the behavior of reinforced concrete columns confined with fiber-reinforced polymer (FRP) sheets. In particular, some new insights on interaction mechanisms between internal steel reinforcement and external FRP strengthening and their influence on efficiency of FRP confinement technique are given. In this context a procedure to generate the complete stress-strain response including new analytical proposals for (1) effective confinement pressure at failure; (2) peak stress; (3) ultimate stress; (4) ultimate axial strain; and (5) axial strain corresponding to peak stress for FRP confined elements with circular and rectangular cross sections, with and without internal steel reinforcement, is presented. Interaction mechanisms between internal steel reinforcement and external FRP strengthening, shown by some experimental results obtained at the University of Padova with accurate measurements, are taken into account in the analytical model. Four experimen...