Compressive behaviour of FRP-confined square concrete columns after creep

被引：29
|
作者：
Zhang, Dian Jie [1 ]
Wang, Yuan Feng [1 ]
Ma, Yi Shuo [1 ]
机构：
[1] Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China
来源：
ENGINEERING STRUCTURES | 2010年 / 32卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Creep; Stress strain relationship; Concrete; Square columns; Fiber reinforced polymer; MICROPRESTRESS-SOLIDIFICATION THEORY; MODEL; STEEL;
D O I：
10.1016/j.engstruct.2010.02.023
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper presents the results of experimental and theoretical investigations on the stress strain responses after creep of short square concrete columns confined by fiber reinforced polymer (FRP). Creep tests were firstly conducted on four specimens (including two loaded creep specimens and their companion load-free shrinkage specimens) with dimensions of 150 mm x 150 mm x 400 mm for 312 days, then, after two weeks of creep recovery, these specimens were axially compressed to failure. The comparison of the stress strain curves between the creep specimens and their companion specimens shows considerable effects of creep on the mechanical behaviours of the columns. Based on the microprestress solidification theory for concrete creep and a modified plasticity model, a constitutive model is proposed to predict the behaviour of FRP-confined square concrete columns after creep. The comparison between the model predictions and the experimental results showed good agreement. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1957 / 1963
页数：7
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