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Extending the application of integral frame abutment bridges in earthquake prone areas by using novel isolators of recycled materials

Mitoulis, S, Palaiochorinou, A, Georgiadis, I and Argyroudis, S (2016) Extending the application of integral frame abutment bridges in earthquake prone areas by using novel isolators of recycled materials Earthquake Engineering and Structural Dynamics, 45 (14). pp. 2283-2301.

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Abstract

Integral Abutment Bridges (IABs) are jointless structures without bearings or expansion joints, which require minimum or zero maintenance. The barrier to the application of longspan IABs is the interaction of the abutment with the backfill soil during the thermal expansion and contraction of the bridge deck, i.e. serviceability, or when the bridge is subjected to dynamic loads, such as earthquakes. The interaction of the bridge with the backfill leads to settlements and ratcheting of the soil behind the abutment and, as a result, the soil pressures acting on the abutment build-up in the long-term. This paper provides a solution for the aforementioned challenges, by introducing a novel isolator that is a compressible inclusion (CI) of reused tyre derived aggregates (TDA) placed between the bridge abutment and the backfill. The compressibility of typical tyre derived aggregates was measured by laboratory tests and the compressible inclusion was designed accordingly. The CI was then applied to a typical integral frame abutment model, which was subjected to static and dynamic loads representing in-service and seismic loads correspondingly. The response of both the conventional and the isolated abutment was assessed based on the settlements of the backfill, the soil pressures and the actions of the abutment. The study of the isolated abutment showed that the achieved decoupling of the abutment from the backfill soil results in significant reductions of the settlements of the backfill and of the pressures acting on the abutment. Hence, the proposed research can be of use for extending the length limits of integral frame bridges subjected to earthquake excitations

Item Type: Article
Subjects : subj_Civil_Engineering
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
AuthorsEmailORCID
Mitoulis, SUNSPECIFIEDUNSPECIFIED
Palaiochorinou, AUNSPECIFIEDUNSPECIFIED
Georgiadis, IUNSPECIFIEDUNSPECIFIED
Argyroudis, SUNSPECIFIEDUNSPECIFIED
Date : November 2016
Identification Number : 10.1002/eqe.2760
Copyright Disclaimer : This is the peer reviewed version of the following article: Mitoulis, S, Palaiochorinou, A, Georgiadis, I and Argyroudis, S (2016) Extending the application of integral frame abutment bridges in earthquake prone areas by using novel isolators of recycled materials Earthquake Engineering and Structural Dynamics, which has been published in final form at http://dx.doi.org/10.1002/eqe.2760 This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 28 Apr 2016 13:25
Last Modified : 21 Oct 2016 12:02
URI: http://epubs.surrey.ac.uk/id/eprint/810563

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