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Investigation of the role of Ductility in the Assessment of Structures Under Tsunami Loading

Macabuag, J; Petrone, C; Rossetto, T; (2018) Investigation of the role of Ductility in the Assessment of Structures Under Tsunami Loading. In: Proceedings of the 16th European Conference on Earthquake Engineering 2018. (pp. p. 11141). The European Association for Earthquake Engineering: 16th European Conference on Earthquake Engineering.

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Abstract

This paper investigates the fundamental principle of whether ductility and dynamic effects are significant in determining structural performance under tsunami loading. It is first shown analytically that an Elastic-PerfectlyPlastic (EPP) Single Degree of Freedom (SDoF) can maintain a load (F) greater than its yield load (Fy) for a duration of time. For an idealised triangular load, the overstrength factor ( ) scales with the displacement ductility demand according to dimensionless parameters of (a) ratio of Fy to the peak applied load, and (b) the ratio of natural period to the duration for which the load exceeds yield. Finally, it is shown that for realistic tsunami load time-histories that the structure will collapse if the applied loads exceed Fy for any significant time. The implications for tsunami-resistant design are that structures must be designed to withstand the full tsunami load elastically and therefore that static procedures could be sufficient for their assessment. The implication for catastrophe modelling is that analytical fragility and vulnerability functions may also be derived using static procedures.

Type: Proceedings paper
Title: Investigation of the role of Ductility in the Assessment of Structures Under Tsunami Loading
Event: 16th European Conference on Earthquake Engineering
Location: Thessaloniki, Greece
Dates: 18 June 2018 - 21 June 2018
Publisher version: http://papers.16ecee.org/files/11141%20final%20cor...
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Tsunami; Ductility; Structural Dynamics
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10069015
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