The University of Southampton
University of Southampton Institutional Repository

Influence of advanced structural modeling technique, mainshock-aftershock sequences, and ground-motion types on seismic fragility of low-rise RC structures

Influence of advanced structural modeling technique, mainshock-aftershock sequences, and ground-motion types on seismic fragility of low-rise RC structures
Influence of advanced structural modeling technique, mainshock-aftershock sequences, and ground-motion types on seismic fragility of low-rise RC structures
Large earthquakes are rare natural hazards, having catastrophic impact on societies due to loss of lives, damage to constructed facilities, and business interruption. Because of damage accumulation due to the main strong shaking, aftershocks potentially endanger the safety of residents and subsequently increase financial loss due to downtime and repair costs. Therefore, accurate prediction of the seismic performance of structures in the post-earthquake stage is critical for disaster risk mitigation. This paper proposes an advanced structural modeling technique, which can simulate various features of cyclic degradation in material and structural components using nonlinear fiber beam-column elements. The proposed model accounts for inelastic buckling and low-cycle fatigue degradation of longitudinal reinforcement, and can simulate multiple failure modes of reinforced concrete structures under dynamic loading. Furthermore, a comprehensive ground motion selection accounting for multiple types of ground motions, such as shallow crustal, deep inslab, and subduction earthquakes, is implemented. Finally, a new set of fragility curves has been developed for each ground motion type, which accounts for the aftershock effects and influence of ground motion types on cyclic degradation and failure modes of low-rise reinforced concrete structures. The proposed methodology significantly improves the accuracy of seismic risk and vulnerability assessment by reducing the uncertainties associated with structural modeling and variability of earthquake ground motions.
RC structures, Inelastic buckling, low-cycle fatigue, Real mainshock-aftershock sequence, Ground motion type
0267-7261
263-279
Salami, Mohammad Reza
db0a471b-65d9-45d6-973b-ae10a3e4febd
Kashani, Mohammad Mehdi
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Goda, Katsu
b3c2895d-7533-449d-b1cc-330218b6141a
Salami, Mohammad Reza
db0a471b-65d9-45d6-973b-ae10a3e4febd
Kashani, Mohammad Mehdi
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Goda, Katsu
b3c2895d-7533-449d-b1cc-330218b6141a

Salami, Mohammad Reza, Kashani, Mohammad Mehdi and Goda, Katsu (2019) Influence of advanced structural modeling technique, mainshock-aftershock sequences, and ground-motion types on seismic fragility of low-rise RC structures. Soil Dynamics and Earthquake Engineering, 117, 263-279. (doi:10.1016/j.soildyn.2018.10.036).

Record type: Article

Abstract

Large earthquakes are rare natural hazards, having catastrophic impact on societies due to loss of lives, damage to constructed facilities, and business interruption. Because of damage accumulation due to the main strong shaking, aftershocks potentially endanger the safety of residents and subsequently increase financial loss due to downtime and repair costs. Therefore, accurate prediction of the seismic performance of structures in the post-earthquake stage is critical for disaster risk mitigation. This paper proposes an advanced structural modeling technique, which can simulate various features of cyclic degradation in material and structural components using nonlinear fiber beam-column elements. The proposed model accounts for inelastic buckling and low-cycle fatigue degradation of longitudinal reinforcement, and can simulate multiple failure modes of reinforced concrete structures under dynamic loading. Furthermore, a comprehensive ground motion selection accounting for multiple types of ground motions, such as shallow crustal, deep inslab, and subduction earthquakes, is implemented. Finally, a new set of fragility curves has been developed for each ground motion type, which accounts for the aftershock effects and influence of ground motion types on cyclic degradation and failure modes of low-rise reinforced concrete structures. The proposed methodology significantly improves the accuracy of seismic risk and vulnerability assessment by reducing the uncertainties associated with structural modeling and variability of earthquake ground motions.

Text
SDEE_Salami_Kashani_Goda_2018 - Accepted Manuscript
Download (3MB)

More information

Accepted/In Press date: 26 October 2018
e-pub ahead of print date: 7 December 2018
Published date: February 2019
Keywords: RC structures, Inelastic buckling, low-cycle fatigue, Real mainshock-aftershock sequence, Ground motion type

Identifiers

Local EPrints ID: 426712
URI: http://eprints.soton.ac.uk/id/eprint/426712
ISSN: 0267-7261
PURE UUID: 7a7ed2e4-1863-4757-abca-489105b932fa
ORCID for Mohammad Mehdi Kashani: ORCID iD orcid.org/0000-0003-0008-0007

Catalogue record

Date deposited: 10 Dec 2018 17:32
Last modified: 07 Oct 2020 05:54

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×