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Erschienen in:

2019 | OriginalPaper | Buchkapitel

10. Performance of Base Isolated Bridges in Recent South Iceland Earthquakes

verfasst von : Bjarni Bessason, Einar Hafliðason, Guðmundur Valur Guðmundsson

Erschienen in: Proceedings of the International Conference on Earthquake Engineering and Structural Dynamics

Verlag: Springer International Publishing

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Abstract

Since 1983, 15 Icelandic bridges have been base isolated for seismic protection. Lead-rubber bearings have been used in all cases. Nine of these bridges are located in the South Iceland Lowland, which is an active seismic zone where earthquakes of magnitude seven can be expected. In June 2000 two Mw6.5 earthquakes struck in the area and in May 2008 a Mw6.3 event hit the area again. Four of the base isolated bridges were located in the near-fault area of these earthquakes with a fault-to-site distance of less than 15 km, and most likely three of them were subjected to strong low-frequency near-fault velocity pulses. None of the bridges collapsed or were severely damaged and all of them were open for traffic immediately after these events. Post-earthquake response analysis has indicated that the base isolation was important for the performance of the bridges.

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Titel: Performance of Base Isolated Bridges in Recent South Iceland Earthquakes
verfasst von: Bjarni Bessason
Einar Hafliðason
Guðmundur Valur Guðmundsson
Verlag: Springer International Publishing
Buch: Proceedings of the International Conference on Earthquake Engineering and Structural Dynamics
Print ISBN: 978-3-319-78186-0

Electronic ISBN: 978-3-319-78187-7

Copyright-Jahr: 2019
DOI: https://doi.org/10.1007/978-3-319-78187-7_10

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