Stress-strain behavior of actively and passively confined concrete under cyclic axial load

被引：87

作者：

Li, Pengda ^{[1
]}

Wu, Yu-Fei ^{[1
,2
]}

机构：

[1] City Univ Hong Kong, Dept Architecture & Civil Engn, Hong Kong, Hong Kong, Peoples R China

[2] RMIT Univ, Sch Engn, Melbourne, Vic 3001, Australia

来源：

COMPOSITE STRUCTURES | 2016年 / 149卷

基金：

中国国家自然科学基金;

关键词：

Concrete; Active confinement; Passive confinement; Cyclic load; Lateral strain; Fibre-reinforced polymer; FIBER-REINFORCED POLYMER; FRP; MODEL; COMPRESSION; COLUMNS; PRISMS; COMPOSITES; STRENGTH;

D O I：

10.1016/j.compstruct.2016.04.033

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Monotonic stress-strain relationship of actively-confined concrete has been used as the base model to establish analysis-oriented stress-strain model of fiber reinforced polymer (FRP) confined concrete. This approach is based on the assumption that the axial stress and strain of FRP-confined concrete are the same as those of actively confined concrete under the same confinement pressure and lateral strain. In this study, an experiment was conducted to verify this assumption for concrete subjected to cyclic loading. A total of 31 actively confined and FRP-confined concrete cylinders were tested. The results indicate that this assumption is not applicable to concrete under cyclic loading; a gap was found between the envelop curves of the two types of confined concrete. In addition, the test results also reveal that confinement pressure significantly affects both reloading modulus and plastic strain which are the main factors controlling cyclic behavior of confined concrete. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：369 / 384

页数：16

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