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Seismic Performance Assessment of Highway Bridges According to Method D2 of FHWA 2006 Manual

Shahidi, Golnaz | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40038 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Maleki, Shervin
  7. Abstract:
  8. Following inadequate performance of bridges during the past earthquakes, serious attention has been drawn to evaluation of seismic vulnerability of existing bridges and retrofit measures. This research surveys seismic performance of existing bridges according to the latest manual for seismic rehabilitation of highway bridges in America (FHWA2006). This manual introduces six different methods which vary considerably in sophistication, rigor and applicability. This research is based on method D2 (Nonlinear Static Procedure or Pushover Method) in which the seismic demands are determined by elastic methods such as multi-mode response spectrum, or elastic time history method and capacity assessment is based on the displacement capacity of individual piers as determined by a pushover analysis. In this research a new parametric study has been done in order to assess the seismic performance of highway bridges according to method D2. Therefore, a number of typical concrete highway bridges were chosen and modeled using SAP2000ver14 software, then their seismic vulnerability were checked using method D2 in 2D and 3D pushover analyses. Subsequently, the results were compared to the requirements of AASHTO-LRFD design specifications, and finally, the effects of parameters like: the number and length of spans, foundation and abutment modeling and P-Δ effects were investigated.
  9. Keywords:
  10. Pushover Analysis ; Seismic Performance ; Seismic Rehabilitation ; Bridges ; Federal Highway Administration (FHWA) ; D2 Method

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