Load distribution factors for horizontally curved concrete box girder bridges
Dissertant
Thesis advisor
Khalil, Raid I.
Sayhood, Iyad K.
University
University of Technology
Faculty
-
Department
Department of Building and Construction Engineering
University Country
Iraq
Degree
Master
Degree Date
2013
English Abstract
Curved reinforced concrete box girder bridges have become an important component in highway systems.
A simplified analysis method is needed for analyzing new bridges.
If appropriate simplified formulas for load distribution factors exist, there is no need for complex analysis.
In this study, a 3-D finite element model was used for the analysis of the curved slab built monolithically with box girders.
A parametric study was carried out to calculate the load distribution factors for curved reinforced concrete box girder bridges based on (AASHTO 1996) live loads by using F.E.M by SAP 2000 (Structural Analysis Program).
The parameters considered in this study were: span-to-radius of curvature ratio, span length, number of longitudinal girders, girder spacing and number of lanes.
The analysis of the bridge was done for the case of full live load and partial live loads.
The results using developed empirical equations as compared with the moment distribution factor of AASHTO are between (0.9-1.26) for interior girder of two boxes bridge, (0.76-0.9) for exterior girder of two boxes bridge, (1.08-1.38) for interior girder of three boxes bridge and between (0.420.8) for exterior girder of three boxes bridge; these values are reasonably close to AASHTO 1996.
The full data are given together with AASHTO 1996 calculations of L/R ratio in range (0-0.9).
The results of the present study show the moment distribution factor and deflection distribution factor for curved bridge if compared to the straight bridge (L/R=0) decrease as the curvature ratio increases in most cases.
^DF percentage of curvature is between (28% - 281%).
The DDF percentage of curvature is between (21% - 277%).
Main Subjects
Engineering & Technology Sciences (Multidisciplinary)
American Psychological Association (APA)
Hasan, Hashim Muhammad. (2013). Load distribution factors for horizontally curved concrete box girder bridges. (Doctoral dissertations Theses and Dissertations Master). University of Technology, Iraq
https://search.emarefa.net/detail/BIM-417701
Modern Language Association (MLA)
Hasan, Hashim Muhammad. Load distribution factors for horizontally curved concrete box girder bridges. (Doctoral dissertations Theses and Dissertations Master). University of Technology. (2013).
https://search.emarefa.net/detail/BIM-417701
American Medical Association (AMA)
Hasan, Hashim Muhammad. (2013). Load distribution factors for horizontally curved concrete box girder bridges. (Doctoral dissertations Theses and Dissertations Master). University of Technology, Iraq
https://search.emarefa.net/detail/BIM-417701
Language
English
Data Type
Arab Theses
Record ID
BIM-417701
