Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Seismic performance of a truss bridge with different substructure configurations

Seismic performance of a truss bridge with different substructure configurations In the present study, the seismic responses of typical railway truss bridges have been investigated using different types of substructure configurations such as single-column bent, multi-column bent and linked-type column configurations. A nonlinear static pushover analysis method is employed to assess the performance of all three substructure configurations using yield strength, yield displacement and ductility capacity as parameters under design basis earthquake and maximum credible earthquake levels. In addition, to provide more comprehensive insights, the collapse margin ratio has been calculated and compared for all three substructure configurations. The results indicated that the performance level is immediate occupancy. For single-column bent configuration, it is elastic for multi-column and linked column bent configurations in transverse and longitudinal directions. Ductility capacity has been calculated and reported higher in single-column bent configuration and lower in multi-column bent configuration for the seismic force in the longitudinal direction. In the transverse direction, ductility is higher in linked column configuration and lower in a single-column bent configuration. The collapse margin ratio observed to be higher for the linked column configuration than the other two configurations. The result shows that the performance of linked column bent configuration is seismically safe and can be used as an effective substructure configuration for the bridge located in high seismic prone regions. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Innovative Infrastructure Solutions Springer Journals

Seismic performance of a truss bridge with different substructure configurations

Loading next page...
 
/lp/springer-journals/seismic-performance-of-a-truss-bridge-with-different-substructure-NRFFtTp3rC
Publisher
Springer Journals
Copyright
Copyright © Springer Nature Switzerland AG 2022
ISSN
2364-4176
eISSN
2364-4184
DOI
10.1007/s41062-022-00788-x
Publisher site
See Article on Publisher Site

Abstract

In the present study, the seismic responses of typical railway truss bridges have been investigated using different types of substructure configurations such as single-column bent, multi-column bent and linked-type column configurations. A nonlinear static pushover analysis method is employed to assess the performance of all three substructure configurations using yield strength, yield displacement and ductility capacity as parameters under design basis earthquake and maximum credible earthquake levels. In addition, to provide more comprehensive insights, the collapse margin ratio has been calculated and compared for all three substructure configurations. The results indicated that the performance level is immediate occupancy. For single-column bent configuration, it is elastic for multi-column and linked column bent configurations in transverse and longitudinal directions. Ductility capacity has been calculated and reported higher in single-column bent configuration and lower in multi-column bent configuration for the seismic force in the longitudinal direction. In the transverse direction, ductility is higher in linked column configuration and lower in a single-column bent configuration. The collapse margin ratio observed to be higher for the linked column configuration than the other two configurations. The result shows that the performance of linked column bent configuration is seismically safe and can be used as an effective substructure configuration for the bridge located in high seismic prone regions.

Journal

Innovative Infrastructure SolutionsSpringer Journals

Published: Apr 1, 2022

Keywords: Earthquakes; Bridges; Substructure configuration; Nonlinear static pushover; Performance level; Collapse margin ratio

References