Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/nhess-2017-168
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
17 May 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Seismic Assessment Of Multi-Span Steel Railway Bridge In Turkey Base On The Nonlinear Time History Analyses
Mehmet F. Yilmaz1,2 and Barlas Ö. Çağlayan1 1Department of Civil Engineering, Istanbul Technical University, Maslak 34469, Istanbul, Turkey
2Department of Civil Engineering, Ondokuz Mayıs University, Kurupelit 55139, Samsun, Turkey
Abstract. It has been seen that bridges are vulnerable to earthquakes by the research studies after important earthquakes like the San Fernando earthquake (1971 USA), the Northridge earthquake (1994 USA), Great Hanshin earthquake (1995 Japan), and Chi-Chi earthquake (1999 Taiwan). These studies show that to do the seismic risk assessments for bridges, fragility curves are useful tools. There are the most used two ways to generate the fragility curves; empirically or analytically. If the damage reports from past earthquakes are available then empirical fragility curves may be developed but otherwise seismic response analysis of structures may be used to develop analytical fragility curves. In Turkey, earthquake damage data are very limited so to develop the fragility curves for the Alasehir bridge, the analytical method is used in this study. The bridge that is studied on is lying on the Manisa-Afyon railway line that is very important for both transportation and freightage. As the most of the country land covers the seismically active zones it is a necessity to find out the vulnerability of the Alasehir bridge. The Alasehir bridge is consists of six 30 m length truss system span with a total span length of 189.43 m supported by 2 abutments and 5 truss piers with height of 12.5 m, 19 m, 26 m, 33 m and 40 m. Sap2000 is used for computer model of the Alaşehir bridge and the model is refined by using field measurements. Then selected 60 different real earthquake data are used for the analysis by using the refined model. Both material nonlinearity and Δ-δ are considered during the analysis. With this study, seismic behavior of Alasehir steel railway bridge is determined. Truss piers reaction and displacements are used to determine the seismic performance of the Alasehir bridge. Different IMs are compared in terms of efficiency, practicality, and sufficiency. Component and system fragility curve are derived for most proper IMs.

Citation: Yilmaz, M. F. and Çağlayan, B. Ö.: Seismic Assessment Of Multi-Span Steel Railway Bridge In Turkey Base On The Nonlinear Time History Analyses, Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2017-168, in review, 2017.
Mehmet F. Yilmaz and Barlas Ö. Çağlayan
Mehmet F. Yilmaz and Barlas Ö. Çağlayan
Mehmet F. Yilmaz and Barlas Ö. Çağlayan

Viewed

Total article views: 470 (including HTML, PDF, and XML)

HTML PDF XML Total BibTeX EndNote
392 65 13 470 1 10

Views and downloads (calculated since 17 May 2017)

Cumulative views and downloads (calculated since 17 May 2017)

Viewed (geographical distribution)

Total article views: 470 (including HTML, PDF, and XML)

Thereof 468 with geography defined and 2 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 17 Oct 2017
Publications Copernicus
Download
Short summary
The main idea of the study is determining seismic behavior and safety of specific bridge under seismic condition. One of the nine Intensity measure is selected considering practicality, efficiency, and proficiency. Component and system fragility curves are derived considering serviceability limits and component capacity. The results show that serves velocity limits has important effects on fragility curve of bridges and truss piers elements are most vulnerable elements in the system.
The main idea of the study is determining seismic behavior and safety of specific bridge under...
Share