Model approach for Polymer Flexible Joints in precast elements joints of concrete pavements

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	Contents
	1. Introduction
	1.1. Outline of the problem 1.2. Genesis of the problem 1.4. Basic assumptions 1.5. Scientific thesis of the work
	2. The current state of knowledge
	2.1. General Polymer Flexible Joint information 2.2. Modelling of PFJ 2.2.1. Theoretical models 2.2.1.1. Linear elasticity 5.2. Medium-sized specimens 2.2.1.2. Hyperelasticity 2.2.2. Theoretical and empirical models 2.2.3. Empirical models 2.3. Factors influencing the polymer
	3. Empirical tests research
	3.1. Objectives 3.2. Methodology 3.3. Experimental test results of small-sized specimens 3.3.1. Shear 3.3.2. Bending 3.3.3. Tension 3.3.4. Compression 3.4. Experimental test results of medium-sized specimens 3.4.1. Shear 3.4.2. Bending 3.4.3. Tension 3.4.4. Compression
	4. Numerical analysis of the Polymer Flexible Joint
	4.1. Objective of the numerical simulations 4.2. Methodology 4.3. Identification of hyperelastic material 4.4. Comparison of results calculated with new and previously known material parameters 4.5. Numerical models of variants tested experimentally
	5. Comparison analysis of the empirical and numerical results
	5.1. Small-sized specimens
	6. Test results for large-sized specimen
	7. Scale effect
	8. Average values of shear, flexural and elasticity modules
	9. Prediction of shear, flexural and elasticity modulus based on performed research
	10. The structural analysis of PFJ in practical applications
	10.1. Precast tram pavement – thermal analysis 10.1.1. Analysis description and assumptions 10.1.2. The influence of PFJ usage on stresses and displacements reduction 10.1.3. The influence of thickness of PFJ on stresses and displacements in the structure 10.1.4. The magnitude of displacement and stress reduction for different levels of thermal load 10.1.5. Conclusions 10.2. Analysis of a typical precast tram pavement subjected to a live load 10.2.1. Assumptions and methodology 10.2.2. Reduction of displacements of bottom surfaces of the slabs 10.2.3. Stress distribution and reduction 10.2.4. Conclusions 10.3. The influence of strips usage on stresses stiffness reduction in PFJ 10.3.1. Description of the analysis 10.3.2. Influence of strips on stiffness 10.3.3. Influence of strips on stresses 10.3.4. Conclusions
	11. Final conclusions
	11.1. Primary practical conclusions 11.2. Conclusions from experimental test results 11.2.1. Influence of analysed deformation range on PFJ stiffness 11.2.2. Stiffness of PFJ under various load types 11.2.3. Characteristics of stress-strain dependence 11.2.4. Scale effect 11.2.5. Impact of the PFJ width, height and thickness on its stiffness 11.2.6. Threshold PFJ load bearing 11.2.7. PFJ construcion 11.2.8. Estimation of PFJ stiffness of any shape based on empirical graphs 11.3. Conclusions from numerical and comparison analysis 11.3.1. Polymer material identification 11.3.2. Rules of numerical modelling of PFJ 11.3.3. Influence of choice of hyperelastic model 11.3.4. Comparison analysis of numerical and empirical results 11.3.5. Stress distribution in PFJ cross-section 11.3.6. Validation of numerical models in a qualitative sense 11.3.7. Compressibility of polymer 11.3.8. Structural analysis of PFJ in typical engineering structures 11.7. Directions for further research 11.4. Completion of research objectives – conclusions 11.5. Research thesis proofs – conclusions 11.6. Dissertation's original elements
	12. Bibliography