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Direct displacement-based seismic design of flexible-base structures subjected to pulse-like ground motions

Hajirasouliha, Iman; Marshall, Alec M.; Lu, Yang

Authors

Iman Hajirasouliha

Yang Lu



Abstract

In this paper, a practical displacement-based framework is presented for seismic design of flexible-base structures in near-fault regions. Particular attention is given to pulse-like motions that may cause significant damage to building structures. The proposed design methodology utilises displacement response spectra constructed using a new procedure, which takes into account the effect of pulse period. An equivalent fixed-base single-degree-of-freedom oscillator is adopted to capture the salient features of an actual soil-structure interaction (SSI) system in order to facilitate the design process. Two step-by-step direct-displacement based design (DDBD) procedures based on compatible inelastic spectra and equivalent linearisation are introduced. The effectiveness of the stated design procedures is examined using results of nonlinear response history analysis of two example SSI systems subjected to a set of sixteen spectrum-compatible near-fault pulse-like ground motions. The results of this study suggest that the procedure based on inelastic design spectra, in general, provides a better design solution than using an elastic linearisation method, especially when structures are designed with a higher ductility demand.

Citation

Hajirasouliha, I., Marshall, A. M., & Lu, Y. (2018). Direct displacement-based seismic design of flexible-base structures subjected to pulse-like ground motions. Engineering Structures, 168, 276-289. https://doi.org/10.1016/j.engstruct.2018.04.079

Journal Article Type Article
Acceptance Date Apr 23, 2018
Online Publication Date Apr 30, 2018
Publication Date Aug 1, 2018
Deposit Date Apr 30, 2018
Publicly Available Date May 1, 2019
Journal Engineering Structures
Print ISSN 0141-0296
Electronic ISSN 0141-0296
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 168
Pages 276-289
DOI https://doi.org/10.1016/j.engstruct.2018.04.079
Keywords Direct-displacement based design; Soil-structure interaction; Velocity pulse; Near-fault ground motion; Inelastic spectra
Public URL http://eprints.nottingham.ac.uk/id/eprint/51468
Publisher URL https://www.sciencedirect.com/science/article/pii/S0141029617311793
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0



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