学位专题

封面
声明
中文摘要
英文摘要
目录
Chapter 1 – Introduction
1.1 Background
1.2 Fatigue damage in orthotropic steel decks and pavements
1.2.1 Concept of the orthotropic steel bridge deck
1.2.2 Fatigue cracks in orthotropic steel deck bridge
1.2.3 Pathologies of asphalt surfacing
1.2.4 Maintenance of orthotropic steel deck bridge overlay
1.3 UHPFRC-steel composite bridge decks
1.3.1 Background of UHPFRC
1.3.2 Shear connectors in UHPFRC-steel composite bridge decks
1.3.3 Concept of the cold bonding connectors
1.4 Objectives and methodology
Chapter 2 – Analysis methodology for UHPFRC-steel composite bridge deck
2.1 Simulation methods for interface contact interaction
2.1.1 Fictional behavior (Surface-to-surface interaction)
2.1.2 Surface-based Cohesive behavior and cohesive zone model
2.2 Numerical fracture mechanics
2.2.1 Theory of fracture mechanics
2.2.2 Theory of fracture crack growth
2.2.3 Fracture criterion: Stress intensity factor evaluation
2.2.4 Theory of extended finite element method (XFEM)
2.2.5 Level set method
2.2.6 Simulation of fatigue crack propagation using ABAQUS
2.3 Numerical simulation models for welding residual stress
2.4 Summary
Chapter 3 – Experimental and analytical study of UHPFRC-steel composite bridge decks
3.1 Introduction
3.2 Experimental specimen design and fabrication
3.2.1 Simplified UHPFRC-steel composite bridge decks
3.2.2 Specimen fabrication
3.2.3 Material properties
3.3 Loading and test instrumentations
3.3.1 Loading procedure
3.3.2 Test instrumentation
3.4 Test results and discussions
3.4.1 Sagging bending moment
3.4.2 Hogging bending moment
3.4.3 Analytical approach to bending performance
3.5 Summary
Chapter 4 – Numerical simulation for test models of composite bridge decks
4.1 Introduction
4.2 FE models of test specimens
4.2.1 Basic information
4.2.2 Finite element models
4.2.3 Interaction and boundary conditions of the specimens
4.2.4 Constitutional laws and material properties
4.3 Numerical simulation results and discussion
4.3.1 Sagging bending moment
4.3.2 Hogging bending moment
4.3.3 Interface force transfer mechanism
4.4 Parameters analysis
4.4.1 Influence of UHPFRC thickness
4.4.2 Influence of UHPFRC compressive and tensile strength
4.4.3 Influence of steel plate thickness
4.4.4 Influence of cold bonding corrugated steel plate shear connector
4.4.5 Shear stud connectors and CSPC arrangement
4.5 Summary
Chapter 5 –Numerical fatigue simulation of composite bridge decks with cold-connectors for a cable-stayed bridge
5.1 Engineering introduction
5.1.1 Geometric description
5.1.2 Cracks location at fatigue details
5.2 Numerical fatigue simulation models for composite bridge decks with cold-connectors
5.2.1 Finite element modeling
5.2.2 Loading case
5.2.3 Prediction of welding residual stress
5.3 Numerical fatigue simulation results and discussions
5.3.1 Interface behavior and bending performance of UHPFRC-steel composite bridge deck
5.3.2 Prediction of fatigue crack growth
5.3.3 Fatigue crack propagation
5.4 Summary
Chapter 6 – Design criteria of UHPFRC-steel composite bridge decks with cold-connectors
6.1 Introduction
6.2 Materials
6.3 Structural design
6.3.1 Philosophy of design criteria
6.3.2 Composite bridge deck and cold bonding connectors design
6.4 Design deformation criteria for composite bridge decks
6.5 Design criteria of interface shear strength for composite bridge decks
Conclusions, Perspectives and Recommendations
Main research conclusions
The main innovation of this paper
Future researches
参考文献
攻读博士学位期间取得的研究成果
致谢