Damage Identification of Truss Bridge under Normal Traffic Loads
Publication: International Conference on Transportation Engineering 2007
Abstract
A method for identifying damage in a truss bridge under normal traffic loads is developed. The static-based method uses only strain measurements at a few degrees of freedom as input to the identification procedure. In this paper, damage in the structure is modeled as a reduction in the cross-section area of the damaged element. The identification problem is formulated as a constrained optimization one, which is solved by using a genetic algorithm (GA). The objective function is defined as the difference between the measured static strains and the analytically predicted strains obtained from a finite element model. By minimizing the objective function, the damage location and damage severity can be successfully identified. The method is demonstrated by using a plane truss bridge model, and the results show that the procedure is a robust method.
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Copyright
© 2007 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Bridge engineering
- Bridges
- Bridges (by type)
- Continuum mechanics
- Degrees of freedom
- Design (by type)
- Displacement (mechanics)
- Engineering fundamentals
- Engineering mechanics
- Finite element method
- Infrastructure
- Load factors
- Material mechanics
- Materials engineering
- Methodology (by type)
- Models (by type)
- Numerical methods
- Solid mechanics
- Strain
- Structural design
- Structural engineering
- Structural mechanics
- Structural members
- Structural models
- Structural systems
- Traffic engineering
- Traffic management
- Transportation engineering
- Truss bridges
- Trusses
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