Behavior of hollow steel sections strengthened with CFRP

被引：21
|
作者：
Abu-Sena, Anwar Badawy Badawy [1 ]
Said, Mohamed [1 ]
Zaki, M. A. [2 ]
Dokmak, Mohamed [2 ]
机构：
[1] Benha Univ, Fac Engn Shoubra, Banha, Egypt
[2] Housing & Bldg Natl Res Ctr, Giza, Egypt
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 205卷
关键词：
Local buckling; Hollow steel sections (HSS); Strengthening; CFRP; STRUCTURAL BEHAVIORS; COLUMNS; CAPACITY;
D O I：
10.1016/j.conbuildmat.2019.01.237
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Experimental and numerical investigations have been performed on twenty short square and rectangular hollow sections (SHS and RHS) steel columns. The confinement action provided by the CFRP wrapping effectively delays the local buckling of fully strengthened specimens. However, in case of partially strengthened specimens, failure occurs at the non-strengthened zones between CFRP strips. The enhancement in ultimate capacity ranges between 19.1% and 34.5% for SHS, and between 18% and 41.3% for RHS specimens. It has been noticed that, the improvement in the behavior for specimens strengthened with two layer strips is limited compared to specimens strengthened with one layer strips. The finite element results are found to be in good agreement with their experimental counterparts. The reliability index between the finite element and the experimental ultimate capacities ranges between 0.01 and 0.1. An analytical model has been developed to predict the failure load of the control specimens. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：306 / 320
页数：15
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