Seismic assessment of steel frame subjected to simulated directivity earthquakes: The unilaterality of fault normal component at various rupture distances

Saha, Sumit and Karthik Reddy, K.S.K. and Somala, S N (2022) Seismic assessment of steel frame subjected to simulated directivity earthquakes: The unilaterality of fault normal component at various rupture distances. Journal of Building Engineering, 47. pp. 1-30. ISSN 2352-7102

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Abstract

Directionality is prominent in the fault normal component of ground motion. It has a different effect on stations in the rupture direction on the tectonic fault than it does on stations in the opposite direction. Such pulse-like features observed in forward and backward directivity stations affect both low-rise and high-rise structures, depending on their fundamental period and the pulse period of ground motion. However, systematic availability of both forward and backward directivity ground motion for unilateral and bilateral earthquakes of the same magnitude at a similar rupture distance for a given fault is rare. So, multiple directivity scenarios are simulated using fracture mechanics-based principles. Using OpenSees, steel moment-resisting frames of 1, 5, and 9 stories, well designed according to building codes, are modeled, and their non-linear response is evaluated. Stations at constant rupture distances are used to compute fragility for each scenario separately. Variation inter-storey drift and peak floor acceleration, along with the hysteretic behavior of panel-zone springs, have also been studied for each of the directivity scenarios. Finally, the results obtained are compared to what is expected by HAZUS. © 2021 Elsevier Ltd

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IITH Creators:

IITH Creators	ORCiD
Somala, S N	https://orcid.org/0000-0003-2663-3351

Item Type:

Article

Additional Information:

The authors thank the two anonymous reviewers, whose comments and suggestions have significantly improved the manuscript. Funding from the Ministry of Earth Sciences through grant number MoES/P.O.(Seismo)/1(304)/2016 is greatly acknowledged.

Uncontrolled Keywords:

Directivity; Dynamic rupture; Fragility; HAZUS; Near-field

Subjects:

Civil Engineering
Civil Engineering > Earthquake Engineering

Divisions:

Department of Civil Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

02 Jul 2022 06:26

Last Modified:

13 Jul 2022 10:38