Serviceability and post-failure behaviour of laminated glass structural elements / / Lorenzo Ruggero Piscitelli.

• Superior document: Premio Tesi di Dottorato ; 80
• VerfasserIn: Piscitelli, Lorenzo Ruggero,
• Place / Publishing House: Firenze : : Firenze University Press,, 2019
• Year of Publication: 2019
• Language: English
• Series: Premio Tesi di Dottorato ; 80.
• Physical Description: 1 online resource (298 pages) :; illustrations; digital, PDF file(s).

Glass structures are being built ever more frequently all over the world, in a growing architectural trend towards light, transparency and sustainability. The engineering design of laminated glass elements being profoundly influenced by properties of interlayers, this multi-scale research highlights some among the key elements on the hyperelastic and viscoplastic response of such synthetic materials. Results and new discoveries are interpreted to better model and predict the response of laminated glass structures: examples are provided for design applications to post-failure safety assessments, structural design and cold-bending techniques. Still, in a vastly unknown field, a growing market and foggy regulatory framework, many challenges and research opportunities remain to be dealt with.

Table of Contents

Index iv -- Abstract (GER) vii -- Abstract ix -- Workflow of the thesis xi -- List of Acronyms xiii -- 1 Structural glass introduction 1 -- 1.1 Materials 5 -- 1.1.1 Glass 6 -- 1.1.2 Interlayer materials 10 -- 1.1.3 Adhesion between glass and interlayers 17 -- 2 State-of-the-art and aim of the research 19 -- 2.1 Shortcomings in the regulatory framework 20 -- 2.2 Scientific literature overview 23 -- 2.2.1 Properties of interlayers used for LG 23 -- 2.2.2 LG models and full-scale experimental analyses 30 -- 2.2.3 Reinforced LG 33 -- 2.2.4 Pre-stressed LG 36 -- 2.2.5 Post-failure LG performance 39 -- 2.3 Aim of the research 41 -- 3 Mechanics 43 -- 3.1 Elasticity 43 -- 3.1.1 Linear elasticity 44 -- 3.1.2 Non-linear elasticity (hyperelasticity) 44 -- 3.1.3 Time-dependent linear elasticity (linear viscoelasticity) 50 -- 3.2 Plasticity 58 -- 3.2.1 Viscoplasticity 59 -- 3.3 Adhesive bonds 60 -- 4 Experimental tests 63 -- 4.1 Short-term tensile properties of interlayers 63 -- 4.1.1 Design and aim of tensile tests 64 -- 4.1.2 Experimental results 65 -- 4.2 Long-term viscoelastic properties of interlayers 72 -- 4.2.1 Aim and design of tests 72 -- 4.2.2 Preliminary tests and highlights 76 -- 4.2.3 Performed tests 84 -- 4.2.4 Experimental results and first data analysis 86 -- 4.3 Progressive damage in Laminated Glass beams 93 -- 4.3.1 Purpose of tests 94 -- 4.3.2 Design and setup 95 -- 4.3.3 Experimental results 103 -- 4.3.4 Uniaxial tests on fully damaged LG specimens 113 -- 5 Critical analysis and discussion 117 -- 5.1 Interlayer properties 117 -- 5.1.1 Short-term properties of interlayers 117 -- 5.1.2 Viscoelastic properties of interlayers in LG 131 -- 5.1.3 Temperature-depentent adhesive properties 151 -- 5.2 Post-failure properties of LG 154 -- 5.2.1 Analysis of the tension-stiffening effect 154 -- 5.2.2 Dynamic tests 155 -- 5.2.3 Equivalent thermal expansion model 158 -- 5.2.4 Fully damaged LG models 162 -- 5.2.5 Delamination and TS effect 166 -- 5.2.6 Synthesis of post failure LG properties 167 -- 6 Applications 169 -- 6.1 Cold-bent glazing 169 -- 6.1.1 Design hypotheses and material properties 170 -- 6.1.2 Design procedure and verifications 172 -- 6.1.3 Results, design options and interlayers comparison 175 -- 6.2 Post-failure analysis of a LG element 177 -- 6.2.1 Data, constraints and parameters 178 -- 6.2.2 Validation of the numerical model 180 -- 6.2.3 Verifications and design 181 -- 7 Thesis and developments 185 -- 7.1 Conclusions of the research 185 -- 7.2 Open topics for future investigations 188 -- Appendix A 195 -- Appendix B 199 -- Appendix C 202 -- Appendix D 206 -- Appendix E 207 -- Appendix F 208 -- Appendix G 209 -- Appendix H 214 -- Appendix I 215 -- Index of figures 217 -- Index of tables 221 -- References 22.