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Table of contents
1 Introduction
1.1 Soil-steel composite bridges
1.2 Design and dynamics
1.3 Previous studies
1.4 Aim and scope
1.5 Structure of the thesis
2 The soil-steel composite bridge in Märsta
2.1 Bridge location and traffic
2.2 Bridge specifications
2.3 Instrumentation and measurement
3 FE- modelling in Plaxis
3.1 About Plaxis
3.2 Model properties
3.3 Creating soil layers
3.3.1 Soil materials
3.3.2 Boreholes
3.4 Creating plates and beams
3.4.1 Creating plates in 3D
3.4.2 Creating beams in 3D
3.4.3 Creating plates in 2D
3.5 Creating interfaces
3.6 Creating point loads and load multipliers
3.6.1 3D
3.6.2 2D
3.7 Mesh
3.7.1 3D
3.7.2 2D
3.8 Staged construction
4 Results and discussion
4.1 Results from 3D-modelling
4.1.1 Influence lines
4.1.2 3D-results versus measurement data
4.1.3 The effect of soil stiffness on pipe behaviour
4.1.4 The effect of friction on pipe behaviour
4.2 Results from 2D-modelling
4.2.1 Influence lines
4.2.2 2D-results versus measurement data
4.2.3 The effect of soil stiffness on pipe behaviour, model 1
4.2.4 The effect of friction on pipe behaviour, model 1
4.2.5 The effect of load on pipe behaviour, model 2
4.3 Comparison of results from 3D and 2D-modelling
5 Conclusions and future research
5.1 Conclusions
5.2 Future research
Bibliography
