Fatigue behaviour of composite sandwich beams strengthened with GFRP stiffeners

被引：36
作者：
Wang, L. [1 ]
Zhang, Y. W. [2 ]
Ho, J. C. M. [3 ]
Lai, M. H. [3 ]
机构：
[1] Nanjing Tech Univ, Coll Civil Engn, Nanjing 211816, Peoples R China
[2] Southeast Univ, Sch Civil Engn, Nanjing 210096, Peoples R China
[3] Guangzhou Univ, Sch Civil Engn, Guangzhou 510006, Peoples R China
来源：
ENGINEERING STRUCTURES | 2020年 / 214卷
基金：
中国国家自然科学基金;
关键词：
Composite sandwich beam; Damage model; Fatigue behaviour; Four-point bending test; GFRP stiffeners; STEEL-TUBE COLUMNS; MECHANICAL PERFORMANCE; PANELS; REINFORCEMENT; CREEP; MODEL;
D O I：
10.1016/j.engstruct.2020.110596
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper investigated the fatigue behaviour of composite sandwich beams, which consisted of glass fibre reinforced plastic (GFRP) skins and a foam core, strengthened with transverse or longitudinal GFRP stiffeners. A total of 42 specimens were prepared using vacuum-assisted resin transfer molding technology. The effects of GFRP stiffeners (transverse or longitudinal) on failure mode, bending deflection behaviour and fatigue life of specimens were investigated. Experimental results revealed that for beams with transverse stiffeners, the failure initiated from core shear and interface debonding between stiffeners and foam core; while for beams with longitudinal stiffeners, the failure was due to GFRP skins compression failure or longitudinal GFRP stiffeners buckling or fracture failure. Moreover, the bending strengths and failure fatigue cycle numbers of beams with longitudinal GFRP stiffeners were all larger than those of common beams or beams with transverse GFRP stiffeners. Lastly, a fatigue damage model was developed to predict the failure cycle number under different loading levels. The validity of the proposed model has been verified to estimate the fatigue behaviour of sandwich beams strengthened with GFRP stiffeners.
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页数：12
相关论文
共 66 条
[1]   Fatigue analysis of honeycomb-composite sandwich beams [J].
Belingardi, G. ;
Martella, P. ;
Peroni, L. .
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 2007, 38 (04) :1183-1191
[2]   Fatigue of foam core sandwich beams .1. undamaged specimens [J].
Burman, M ;
Zenkert, D .
INTERNATIONAL JOURNAL OF FATIGUE, 1997, 19 (07) :551-561
[3]   Fatigue of foam core sandwich beams .2. effect of initial damage [J].
Burman, M ;
Zenkert, D .
INTERNATIONAL JOURNAL OF FATIGUE, 1997, 19 (07) :563-578
[4]   Experimental and Numerical Analysis of Nonlinear Flexural Behaviour of Lattice-Web Reinforced Foam Core Composite Sandwich Panels [J].
Chen, Jiye ;
Fang, Hai ;
Liu, Weiqing ;
Qi, Yujun ;
Zhu, Lu .
ADVANCES IN CIVIL ENGINEERING, 2018, 2018
[5]   Tests of Cold-Formed Steel Semi-Oval Hollow Section Members under Eccentric Axial Load [J].
Chen, Man-Tai ;
Young, Ben .
JOURNAL OF STRUCTURAL ENGINEERING, 2020, 146 (04)
[6]   Experimental investigation on cold-formed steel stiffened lipped channel columns undergoing local-distortional interaction [J].
Chen, Man-Tai ;
Young, Ben ;
Martins, Andre Dias ;
Camotim, Dinar ;
Dinis, Pedro Borges .
THIN-WALLED STRUCTURES, 2020, 150
[7]   Beam-column tests of cold-formed steel elliptical hollow sections [J].
Chen, Man-Tai ;
Young, Ben .
ENGINEERING STRUCTURES, 2020, 210
[8]   Mechanical properties in glass fiber PVC-foam sandwich structures from different chopped fiber interfacial reinforcement through vacuum-assisted resin transfer molding (VARTM) processing [J].
Chen, Qihui ;
Ting Linghu ;
Gao, Yingju ;
Wang, Zhi ;
Liu, Yaqing ;
Du, Ruikui ;
Zhao, Guizhe .
COMPOSITES SCIENCE AND TECHNOLOGY, 2017, 144 :202-207
[9]   Modelling the fatigue behaviour of sandwich beams under monotonic, 2-step and block-loading regimes [J].
Clark, SD ;
Shenoi, RA ;
Allen, HG .
COMPOSITES SCIENCE AND TECHNOLOGY, 1999, 59 (04) :471-486
[10]   Static and fatigue bending behavior of pultruded GFRP sandwich panels with through-thickness fiber insertions [J].
Dawood, M. ;
Taylor, E. ;
Ballew, W. ;
Rizkalla, S. .
COMPOSITES PART B-ENGINEERING, 2010, 41 (05) :363-374
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