Reliability assessment of a typical steel truss bridge
The paper presents the structural reliability analysis of a multilane steel truss bridge to assess the safety of the bridge, both in its current configuration and with the addition of a new lane. Probabilistic models of tensile and compressive resistance, as well as dead load, were obtained from existing literature. The probabilistic model of the peak 50-year live load was derived from traffic survey data obtained from the bridge site which enabled an extreme value type I distribution to be fitted to the upper tail of the distribution of load effects due to traffic loading. The reliability analysis found that the reliability index for the current bridge is 3.1. The reliability index for the new clip-on bus lane reduces to 2.9. The reliability indices are compared to the target reliabilities recommended in the Australian Standards. This paper aims to determine the realistic bridge load capacity and the appropriate strengthening to carry maximum traffic load without minimising risk. The structural reliability analysis provides very useful risk management tool for assessing the safety of existing bridges. (a) For the covering entry of this conference, please see IRRD abstract no. E218160.
- Record URL:
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Authors:
- SHAH, P M
- STEWART, M
- FOK, H
- Publication Date: 2009-5
Language
- English
Media Info
- Pagination: 14P
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Serial:
- AUSTROADS BRIDGE CONFERENCE, 7TH, 2009, AUCKLAND, NEW ZEALAND
- Publisher: CONVENTION MANAGEMENT
Subject/Index Terms
- TRT Terms: Bridges; Conferences; Loads; Management; Metal bridges; Multilane highways; Strength of materials
- ITRD Terms: 155: Administration; 3455: Bridge; 8525: Conference; 5567: Load; 3465: Metal bridge; 2838: Multilane; 5544: Strength (mater)
- Subject Areas: Administration and Management; Bridges and other structures; Highways; I24: Design of Bridges and Retaining Walls;
Filing Info
- Accession Number: 01143965
- Record Type: Publication
- Source Agency: TRL
- Files: ITRD, ATRI
- Created Date: Nov 16 2009 12:17PM