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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    Title :

    Damage Identification of Truss Bridge under Normal Traffic Loads


    Contributors:
    Wang, Ying (author) / Zhao, Renda (author)

    Conference:

    First International Conference on Transportation Engineering ; 2007 ; Southwest Jiaotong University, Chengdu, China



    Publication date :

    2007-07-09




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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