A new finite element formulation for the lateral torsional buckling analyses of orthotropic FRP-externally bonded steel beams

被引：0
|
作者：
Doan-Tan, Thi [2 ]
Nguyen, Xuan-Huy [3 ]
Pham, Phe Van [1 ]
机构：
[1] Univ Transport & Commun, Fac Civil Engn, 3 Cau Giay, Hanoi, Vietnam
[2] Univ Transport & Commun, Fac Civil Engn, Campus Ho Chi Minh City,450-451 Le Van Viet, Ho Chi Minh City, Vietnam
[3] Univ Transport & Commun, Fac Construct Engn, 3 Cau Giay, Hanoi, Vietnam
来源：
CURVED AND LAYERED STRUCTURES | 2024年 / 11卷 / 01期
关键词：
lateral torsional buckling; finite element formulation; shear deformations; FRP strengthening; partial interaction; local and global warpings; orthotropic FRP layers; multispan beams; POSTBUCKLING BEHAVIOR; COMPOSITE BEAMS; GFRP; 1ST-ORDER; REPAIR; PLATES; SHEAR;
D O I：
10.1515/cls-2024-0011
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The present study develops a new finite element (FE) formulation for the lateral torsional buckling (LTB) analyses of steel beams exteriorly bonded with orthotropic fiber-reinforced polymer (FRP) layers. The formulation considers shear deformations, partial material interaction, local and global warping deformations, and orthotropic FRP properties. The buckling responses of multispan FRP-bonded steel beams predicted by the present solutions are excellently validated against experiment and numerical solutions. As observed, the FRP strengthening is highly effective for the LTB resistance of steel beams. However, the LTB responses are strongly dependent on the orthotropic properties and strengthening lengths of FRP layers. The effects of shear deformations, span ratios, and loading conditions on the LTB responses are also quantified in the present study.
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页数：24
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