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Non-Linear Analysis and Remaining Fatigue Life of Reinforced Concrete Bridges: Sustainable Bridges Background document D4.5
Chalmers University of Technology, Göteborg, Sweden.
Chalmers University of Technology, Göteborg, Sweden.
Chalmers University of Technology, Göteborg, Sweden.
Chalmers University of Technology.
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2007 (English)Report (Refereed)
Abstract [en]

The work provides methods for non-linear structural analysis and fatigue safety evaluation in assessment of existing railway bridges. The use of non-linear analysis leads to higher load carrying capacities, but also to improved understanding of the structural response, forming a better basis for decisions in the assessment. The methods for fatigue assessment lead to increased remaining service life of reinforced concrete railway bridges.

The achievements of the work are:

• Models for assessment of concrete bridges by non-linear analysis are described, and examples and general recommendations for practical application of the methods aregiven.

• An overview of the effect of corrosion on the bond properties has been developed through non-linear analyses and tests found in literature. Recommendations for practical assessment of anchorage capacity in corroded railway concrete bridges are presented.

• The determination of reliable in-situ material properties in old concrete bridges is described,including properties for fully probabilistic analysis. A particular aim was to develop better methods to describe development of concrete properties with age and degree of hydration.

• Recommendations are given regarding re-distribution of sectional forces and moments, obtained through linear structural analysis (with FEM). In a case study, a typical slab bridge was designed using different methods, and its response evaluated through nonlinearanalyses.

• A good understanding of the load-carrying mechanisms in combined bending-shear-torsion gives a possibility to make more accurate assessments than with standard code methods. Methods and examples are presented.

• A state-of-the-art review of fatigue behaviour of reinforced concrete railway bridges is presented and a methodology to assess the remaining fatigue life of existing reinforced concrete bridges subjected to railway traffic is developed.

Place, publisher, year, edition, pages
2007. , p. 192
Keywords [en]
Non-linear analysis of bridges, Fatigue of concrete bridges
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-75316OAI: oai:DiVA.org:ltu-75316DiVA, id: diva2:1337427
Note

EC Sixth Framework Program

Sustainable Bridges – Assessment for Future Traffic Demands and Longer Lives

TIP3-CT-2003-001653

Available from: 2019-07-14 Created: 2019-07-14 Last updated: 2019-08-14

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SB 4.5(6877 kB)7 downloads
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