Campus Units
Civil, Construction and Environmental Engineering
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
1-2015
Journal or Book Title
Journal of Bridge Engineering
Volume
20
Issue
1
First Page
04014055-1
Last Page
04014055-11
DOI
10.1061/(ASCE)BE.1943-5592.0000641
Abstract
Current seismic design practice related to integral bridge girder-to-cap beam connections allows little or no lateral seismic load to be distributed beyond the girders immediately adjacent to the column. However, distribution results from several large-scale tests have shown that the distribution of column seismic moment typically engages all the girders. An approach utilizing simple stiffness models to predict distribution in integral bridge structures is presented in detail; distribution predictions based on grillage analyses also are compared. The experimental results and the analytical results from the stiffness and grillage models show that current design methods related to vertical load distribution are sufficiently accurate. However, when applied to the distribution of lateral load, similarly obtained results reveal that current design practice does not appropriately account for the amount of load that is distributed beyond the girders adjacent to the column to the nonadjacent girders. The current practice leads to excessive girder-to-cap connection reinforcement, increased girder depth, unnecessarily high seismic mass, and increased construction cost. Finally, this paper makes recommendations for more appropriate distribution of seismic lateral load in integral bridge superstructures. D
Research Focus Area
Geotechnical/Materials Engineering
Copyright Owner
ASCE
Copyright Date
2014
Language
en
File Format
application/pdf
Recommended Citation
Vander Werff, Justin and Sritharan, Sri, "Girder Load Distribution for Seismic Design of Integral Bridges" (2015). Civil, Construction and Environmental Engineering Publications. 157.
https://lib.dr.iastate.edu/ccee_pubs/157
Included in
Civil Engineering Commons, Construction Engineering and Management Commons, Geotechnical Engineering Commons
Comments
This is a manuscript of an article published as Vander Werff, J., & Sritharan, S. (2014). Girder Load Distribution for Seismic Design of Integral Bridges. Journal of Bridge Engineering, 20(1), 04014055. doi: 10.1061/(ASCE)BE.1943-5592.0000641. Posted with permission.