Restrain of a seismically isolated bridge by external stoppers

Mitoulis, SA and Tegos, IA (2010) Restrain of a seismically isolated bridge by external stoppers Bulletin of Earthquake Engineering, 8 (4). pp. 973-993.

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Abstract

The current design of seismically isolated bridges usually combines the use of bearings and stoppers, as a second line of defence. The stoppers allow the development of the in-service movements of the bridge deck, without transmitting significant loads to the piers and their foundations, while during earthquake they transmit the entire seismic action. Despite the fact that stoppers, which restrain the transverse seismic movements of the deck, are used frequently in seismically isolated bridges, the use of longitudinal stoppers is relatively rare, mainly due to the large in-service constraint movements of bridges. The present paper proposes a new type of external longitudinal stoppers, which are installed in stiff sub-structures-boundaries, aiming at limiting the bridge seismic movements. The parametric investigation, which was conducted in order to identify the seismic efficiency of the external stoppers, showed that the interaction of the bridge with the stiff boundaries can lead to significant reductions in the seismic movements of the bridge. Serviceability is appropriately arranged in the paper by expansion joints and approach slabs. © 2010 Springer Science+Business Media B.V.

Item Type:	Article
Authors :	Name Email ORCID Mitoulis, SA s.mitoulis@surrey.ac.uk Tegos, IA
Date :	22 January 2010
DOI :	10.1007/s10518-009-9172-z
Depositing User :	Symplectic Elements
Date Deposited :	17 May 2017 12:46
Last Modified :	16 Jan 2019 18:35
URI:	http://epubs.surrey.ac.uk/id/eprint/836677

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