Investigation and comparison of bearing devices used in high-speed railway bridges under earthquake impact

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2019

Author

Aşcı, Uğur

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This study covers the investigation of behavior and comparison of two bearing types (elastomeric and pot bearings) under earthquake effects. Real earthquake records are used in this study. Earthquake selection is an important process. The plan behind the selection process is to cover the earthquakes with high occurrence rates in real life and to gain more realistic results. Magnitudes of selected earthquakes are 6.0, 6.5 or 7.0. The location assumed at which the effects of earthquakes investigated is 15 to 30 km away from the fault. Soil class of the assumed location is either C or D. Depending on earthquake magnitude and soil properties, 6 data groups are formed. In each group, 7 different earthquake data are taken into consideration. To make a comparison between the behavior of different bearing types, elastomeric and pot bearings are chosen since they are the most widely used bearing types. For elastomeric bearing used cases; case 1 is using elastomeric bearing under each beam and case 2 is using less elastomeric bearing under the cross beam. In pot bearing case, say case 3, the same amount of bearings is taken into the account as in case 2 of elastomeric bearing is used. This study has been done for the bridge which is 95-meter-long with 3 spans and 2 piers. Each pier has a height of 15 meters. For the analytic model and structural analysis finite element program, SAP2000 v.14.2.2 has been used. Within this study behavior of bearings under real earthquake effect depending upon magnitude and soil properties are investigated.

Subject Keywords

Railroad bridges., High-Speed Railway Bridges, Bearing Devices, Elastomeric Bearing, Pot Bearing, Earthquake Effects on Bearings.

URI

http://etd.lib.metu.edu.tr/upload/12624782/index.pdf
https://hdl.handle.net/11511/46111

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

U. Aşcı, “Investigation and comparison of bearing devices used in high-speed railway bridges under earthquake impact,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences . Earthquake Studies., Middle East Technical University, 2019.