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INVESTIGATION OF SEVERAL ISSUES RELATED TO THREE DIMENSIONAL FINITE ELEMENT BRIDGES CONDITION EVALUATION

LI, ZHENGSHENG
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1069770984

Abstract Details

2003, MS, University of Cincinnati, Engineering : Civil Engineering.
Three Dimensional (3D) Finite Element (FE) model analyses is a useful tool in bridge condition evaluation. One of the key points during this calibration process is to select parameters that are critical to the response of a bridge and calibrate them to match the actual situation. The first part of this thesis will address how to select the proper parameters in the calibration process and outline sensitivity study of the selected parameters that can be used during the FE model calibration. A zero skew, three span continuous steel girder bridge was selected as an example for this study. Different mode shapes will play different roles in the dynamic behavior of a structure. It is critical to identify the most important mode shapes in the calibration process of Finite Element (FE) models. The aim of the second part is to develop contribution coefficients for different modes based on the flexibility of the bridge. The modal flexibility of the structure can be directly calculated from the modal vectors. If unit load vectors are applied, the deflection of the structure can be obtained and will reflect the contribution of each mode. As for the steel stringer bridges, the Bridge Girder Condition Indicator (BGCI) will be introduced and used as an index for the condition of the bridges. The contribution coefficient of different modes can be calculated based on the BGCI of the bridge. For slab-on-steel-girder type bridges, link elements are used to simulate the composite action between the concrete slab and the steel girder. Studies show that the link elements play a critical role in the responses of bridges, especially in the tuning of the deformation of the girders. Research has also demonstrated that the coefficients of the link element between the steel girders and the concrete slab vary with locations. This paper addresses a matrix updating method between the coefficients of link elements and the deformations of the steel girders based on sensitivity analyses. The beauty of this method is that the updating process incorporates the interactions of link elements in an iterative process that can be very efficient.
Dr. James A. Swanson (Advisor)
142 p.
Engineering, Civil
bridge condition assessment; finite element model; modal analysis

Recommended Citations

Citations

  • LI, Z. (2003). INVESTIGATION OF SEVERAL ISSUES RELATED TO THREE DIMENSIONAL FINITE ELEMENT BRIDGES CONDITION EVALUATION [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1069770984

    APA Style (7th edition)

  • LI, ZHENGSHENG. INVESTIGATION OF SEVERAL ISSUES RELATED TO THREE DIMENSIONAL FINITE ELEMENT BRIDGES CONDITION EVALUATION. 2003. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1069770984.

    MLA Style (8th edition)

  • LI, ZHENGSHENG. "INVESTIGATION OF SEVERAL ISSUES RELATED TO THREE DIMENSIONAL FINITE ELEMENT BRIDGES CONDITION EVALUATION." Master's thesis, University of Cincinnati, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1069770984

    Chicago Manual of Style (17th edition)

ucin1069770984
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© 2003, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.