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A Procedure for Performing Nonlinear Pushover Analysis for Tsunami Loading to ASCE 7

Baiguera, M; Rossetto, T; Robertson, IN; Petrone, C; (2022) A Procedure for Performing Nonlinear Pushover Analysis for Tsunami Loading to ASCE 7. Journal of Structural Engineering , 148 (2) , Article 04021270. 10.1061/(asce)st.1943-541x.0003256. Green open access

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Abstract

The new ASCE 7-16 Chapter 6 offers a comprehensive and practical methodology for the design of structures for tsunami loads and effects. While it provides prescriptive tsunami loading and design requirements, Chapter 6 also allows for the use of performance-based nonlinear analysis tools. However, the specifics of load application protocol and system and component evaluation for such a nonlinear approach are not provided. This paper presents a procedure for performing nonlinear static pushover analysis for tsunami loading within the framework of the ASCE 7-16 standard. Through this approach, the user can both estimate the effective systemic lateral load-resisting capacity of a building and the local component demand. This enables the identification of deficiencies in structural elements with respect to the ASCE 7-16 standard acceptance criteria. To demonstrate the procedure, a prototypical reinforced concrete multistory building exposed to high tsunami hazard on the US Northwest Pacific Coast is assessed. This is a building with sufficient height to provide last-resort refuge for people having insufficient time to evacuate outside the inundation zone. 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, but fails the checks for component-based loading, with the exterior ground-story columns observed to fail in flexure and shear. The example demonstrates that use of the tsunami nonlinear static analysis procedure allows the identification of structural deficiencies such that a targeted strengthening of the building can be conducted (i.e., flexural and shear strengthening of the seaward and inland columns for the case study building presented), leading to significantly reduced costs.

Type: Article
Title: A Procedure for Performing Nonlinear Pushover Analysis for Tsunami Loading to ASCE 7
Open access status: An open access version is available from UCL Discovery
DOI: 10.1061/(asce)st.1943-541x.0003256
Publisher version: https://doi.org/10.1061/(asce)st.1943-541x.0003256
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Tsunami; ASCE 7 standard; Nonlinear static analysis; Pushover analysis
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/10141458
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