A Procedure for performing nonlinear pushover analysis for Tsunami loading to ASCE 7
A Procedure for performing nonlinear pushover analysis for Tsunami loading to ASCE 7
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.
ASCE 7 standard, Nonlinear static analysis, Pushover analysis, Tsunami
Baiguera, Marco
8d832edf-e16f-426a-be38-6bcdc7b83545
Rossetto, Tiziana
5bd69a09-5cac-4eaf-b22a-948d07f3e058
Robertson, Ian N.
76c80101-2484-4b36-96be-1dbcd4ddc83d
Petrone, Crescenzo
661c12d1-d9bd-4aee-b15a-23d5c09d9dd2
Baiguera, Marco
8d832edf-e16f-426a-be38-6bcdc7b83545
Rossetto, Tiziana
5bd69a09-5cac-4eaf-b22a-948d07f3e058
Robertson, Ian N.
76c80101-2484-4b36-96be-1dbcd4ddc83d
Petrone, Crescenzo
661c12d1-d9bd-4aee-b15a-23d5c09d9dd2
Baiguera, Marco, Rossetto, Tiziana, Robertson, Ian N. and Petrone, Crescenzo
(2021)
A Procedure for performing nonlinear pushover analysis for Tsunami loading to ASCE 7.
Journal of Structural Engineering, 148 (2), [04021270].
(doi:10.1061/(ASCE)ST.1943-541X.0003256).
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.
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(ASCE)ST.1943-541X.0003256
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Accepted/In Press date: 7 October 2021
e-pub ahead of print date: 26 November 2021
Additional Information:
Funding Information:
The research work presented in this paper was funded by the European Research Council, ERC Grant Agreement 336084 URBANWAVES, awarded to Professor Tiziana Rossetto. The authors are grateful to Mr. Jacob McKamey for his assistance in this research. The authors also acknowledge Willis Research Network for supporting the time of Dr. Crescenzo Petrone and Dr. Marco Baiguera.
Publisher Copyright:
© 2021 American Society of Civil Engineers.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
Keywords:
ASCE 7 standard, Nonlinear static analysis, Pushover analysis, Tsunami
Identifiers
Local EPrints ID: 456112
URI: http://eprints.soton.ac.uk/id/eprint/456112
ISSN: 0733-9445
PURE UUID: cb839997-3e57-48aa-b787-e8bf5bd52ecd
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Date deposited: 26 Apr 2022 14:52
Last modified: 17 Mar 2024 04:06
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Author:
Tiziana Rossetto
Author:
Ian N. Robertson
Author:
Crescenzo Petrone
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