Adhesive free laminated beams (AFLB)

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Table of contents

Chapter 1: Introduction
1.1 Background and motivations
1.1.1 Multilayered timber structures
1.1.2 Towards Adhesive-Free Timber Buildings (AFTB) project
1.1.3 History of using wood dowel in timber structure
1.1.4 Performance of timber structures assembled by compressed wood dowels
1.1.5 Vibration performance of timber structures
1.2 Objective of the thesis
1.3 Outline
Chapter 2: Experimental modal analysis
2.1 Production of adhesive free laminated beams and adhesive free CLT panels
2.1.1 Compressed spruce dowels
2.1.2 Adhesive free laminated beams (AFLB) and adhesive free CLT (AFCLT) panels
2.2 Experimental set-up
2.2.1 Hammer impact excitation
2.2.2 Moisture content condition
2.2.3 Repeatability test
2.3 Characteristic of wood material
2.4 Single layer beams
2.5 Three-layer AFLBs
2.5.1 Effect of compressed wood dowels
2.5.2 Effect of the number of dowels
2.5.3 Effect of moisture content
2.6 AFCLT panels
2.7 Academic contribution
2.8 Conclusion
Chapter 3: Finite element models
3.1 Introduction
3.1.1 Existing finite element (FE) models
3.1.2 Verification and Validation methodology
3.2 FE model for single layer beam
3.2.1 Sensitivity analysis
3.2.2 Verification of the model
3.2.3 Validation of the model
3.2.4 Effect of homogeneous material assumption
3.3 FE model for three-layer AFLB
3.3.1 Sensitivity analysis
3.3.2 Verification of the model
3.3.3 Validation of the model
3.3.4 Effect of stiffness of CSD on frequencies of AFLB
3.4 FE model for AFCLT panel
3.4.1 Verification of the model
3.4.2 Validation of the model
3.5 FE model for full-size AFCLT panel
3.5.1 Prediction of frequencies and modal shapes
3.5.2 Comparison with EC5 requirements
3.5.3 Optimization for the first frequency
3.6 Simplified FE model
3.6.1 Simplifying dowels by beam elements
3.6.2 Simplifying layer by shell elements
3.6.3 Simplifying shape of dowel
3.6.4 Computational cost effect
3.7 Academic contribution
3.8 Conclusion
Chapter 4: Variability with MSP
4.1 Introduction
4.1.1 Short overview on non-deterministic methods
4.1.2 Presentation of the Modal Stability Procedure (MSP)
4.2 General MSP formulation
4.3 Development of MSP formulation for 20-node hexahedral solid element
4.3.1 MSP mesh convergence
4.3.2 Comparison between MSP and FE model in the nominal case
4.4 Uncertain parameters and distribution law
4.5 Assessment of the MSP to calculate variability
4.5.1 Error indicator
4.5.2 Comparison between MSP and direct MCS for single layer beam and AFLB
4.5.3 Error indicator for AFCLT panels
4.6 Influence of uncertain properties of compressed wood dowels
4.7 Comparison between MSP and experimental results
4.7.1 Comparison for single layer beam
4.7.2 Comparison for AFLB
4.7.3 Comparison for AFCLT panel
4.8 Prediction variability of full-size AFCLT panel
4.9 Computational cost
4.10 Academic contribution
4.11 Conclusion
Chapter 5: General conclusion and perspectives
5.1 General conclusion
5.2 Perspectives
Bibliography