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Towards a tsunami nonlinear static analysis procedure for the ASCE 7 standard

Baiguera, M; Rossetto, T; Robertson, IN; Petrone, C; (2019) Towards a tsunami nonlinear static analysis procedure for the ASCE 7 standard. In: Proceedings of the 2nd International Conference on Natural Hazards & Infrastructure 2019. National Technical University of Athens: Chania, Greece. Green open access

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Abstract

Tsunami design provisions for coastal structures are now included in a new chapter of ASCE 7-16 Standard. The provisions provide prescriptive tsunami loading and design requirements, and they allow for the use of alternative performance-based criteria, including nonlinear static analysis. However, no guidance is provided as to how the performance-based analysis should be performed. This paper presents an improved nonlinear static pushover procedure for the assessment of the nonlinear capacity of structures to tsunami, within the framework of the ASCE 7-16 provisions. For this purpose, a prototypical reinforced concrete multi-storey building exposed to high seismic and tsunami hazards along the Northwest Pacific coast of the USA is assessed. Two different tsunami load discretisation methods are applied to investigate the structural capacity under tsunami systemic and component loading, respectively. The results of the nonlinear static pushover analyses show that the structural system has sufficient lateral strength to resist ASCE 7-16 prescribed tsunami loads. However, when component-based loading is considered, the seaward ground storey columns are observed to fail in shear, precipitating structural failure. Overall, the nonlinear static pushover analysis, considering component behaviour, provide the same result as the ASCE 7-16 simplified systemic acceptance criteria, i.e. that the structure is unsafe for use as a refuge, and that it would require significant strengthening.

Type: Proceedings paper
Title: Towards a tsunami nonlinear static analysis procedure for the ASCE 7 standard
Event: 2nd International Conference on Natural Hazards & Infrastructure 2019
Location: Crete, Greece
Dates: 23 June 2019 - 26 June 2019
Open access status: An open access version is available from UCL Discovery
Publisher version: https://iconhic.com/2019/
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 Engineering, Concrete frames, Tsunami Pushover, ASCE 7 Standard
UCL classification: UCL
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/10078809
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