Contents
Preface
1 Introduction 1
1.1 Application of FRP composites in civil infrastructure 1
1.2 Research status of composite sandwich structure 2
1.2.1 Static behavior 2
1.2.2 Fatigue behavior 3
1.2.3 Creep behavior 4
1.2.4 Energy absorption behavior 6
References 6
2 Flexural properties of foam core sandwich structures 15
2.1 Flexural behavior of hybrid composite beams with a bamboo layer and lattice ribs 15
2.1.1 Material characterization 16
2.1.2 Experimental programme 22
2.1.3 Analysis and discussion 29
2.1.4 Summary 32
2.2 Nonlinear flexural properties of lattice-web reinforced foam core sandwich panels 32
2.2.1 Experimental program 34
2.2.2 Experimental results and discussion 37
2.2.3 Finite element analysis 42
2.2.4 Parametric studies 46
2.2.5 Summary 49
References 50
3 Static properties of wood core sandwich structures 52
3.1 Flexural properties of sandwich panels with web reinforced wood core 52
3.1.1 Experimental program 53
3.1.2 Experimental results and discussion 57
3.1.3 Analytical modeling 70
3.1.4 FE modeling 74
3.1.5 Summary 79
3.2 Flexural properties of innovative GFRP-bamboo-wood sandwich beams 80
3.2.1 Experimental program 81
3.2.2 Experimental results of flexural behavior 85
3.2.3 Analytic and finite element modeling 94
3.2.4 Design optimization 101
3.2.5 Summary 105
3.3 Compressive properties of wood-filled GFRP square columns 106
3.3.1 Experimental programme 107
3.3.2 Experimental results and discussions 111
3.3.3 Analysis and comparison of the experimental results 115
3.3.4 Summary 121
References 122
4 Fatigue properties of composite sandwich structures 125
4.1 Fatigue properties of GFRP-balsa sandwich beams 125
4.1.1 Materials and specimens 125
4.1.2 Static bending experimental study 128
4.1.3 Fatigue bending experimental study 130
4.1.4 Proposition and verification of the fatigue damage model 138
4.1.5 Summary 148
4.2 Fatigue properties of lattice-web reinforced GFRP-balsa sandwich beams 149
4.2.1 Experimental programs 149
4.2.2 Experimental results 154
4.2.3 Fatigue cumulative damage model 166
4.2.4 Fatigue damage and life prediction 172
4.2.5 Summary 173
References 174
5 Creep properties of composite sandwich beams 176
5.1 Flexural creep behavior and life prediction of GFRP-balsa sandwich beams 176
5.1.1 Materials and specimens 176
5.1.2 Static three-point bending tests 179
5.1.3 Flexure creep tests 181
5.1.4 Fitting and prediction 193
5.1.5 Summary 198
5.2 Flexural creep behavior of web reinforced GFRP-balsa sandwich beams:Experimental investigation and modeling 199
5.2.1 Experimental section 200
5.2.2 Experimental results 207
5.2.3 Discussion 213
5.2.4 Summary 224
References 225
6 Energy absorption properties of composite sandwich structures 227
6.1 Energy absorption of foam-filled lattice composite cylinders under lateral compressive loading 227
6.1.1 Materials and methods 227
6.1.2 Experimental results and discussion 232
6.1.3 Finite element modelling 244
6.1.4 Parametric study 248
6.1.5 Summary 251
6.2 The energy absorption behaviour of novel foam-filled sandwich composite panels reinforced by trapezoidal latticed webs 252
6.2.1 Experimental program 252
6.2.2 Experimental results and discussion 255
6.2.3 Finite element modelling 262
6.2.4 Parametric study 271
6.2.5 Finite element analysis of composite anti-collision device for Wuhu Yangtze River Bridge 273
6.2.6 Summary 277
References 277
7 Engineering application of composite sandwich structures 279
7.1 Frame assemblies in port regions 279
7.2 FRP composite bumper systems for bridge piers 282
7.2.1 Fixed composite bumper system 282
7.2.2 Floating composite bumper system 284
7.2.3 Large-scale floating composite bumper system 285
7.3 Floating FRP structures for supporting solar panels 288
7.4 Pavement mats for emergency 289
7.5 Building floor 290
7.6 Summary 291
References 291
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