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Seismic response of non-structural components attached to reinforced concrete structures with different eccentricity ratios

Citation

Aldeka, AB and Dirar, S and Chan, AHC and Martinez-Vazquez, P, Seismic response of non-structural components attached to reinforced concrete structures with different eccentricity ratios, Earthquakes and Structures, 8, (5) pp. 1069-1089. ISSN 2092-7614 (2015) [Refereed Article]


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Copyright Statement

Copyright 2015 Earthquakes and Structures

DOI: doi:10.12989/eas.2015.8.5.1069

Abstract

This paper presents average numerical results of 2128 nonlinear dynamic finite element (FE) analyses of lightweight acceleration-sensitive non-structural components (NSCs) attached to the floors of one-bay three-storey reinforced concrete (RC) primary structures (P-structures) with different eccentricity ratios. The investigated parameters include the NSC to P-structure vibration period ratio, peak ground acceleration, P-structure eccentricity ratio, and NSC damping ratio. Appropriate constitutive relationships were used to model the behaviour of the RC P-structures. The NSCs were modelled as vertical cantilevers fixed at their bases with masses on the free ends and varying lengths so as to match the vibration periods of the P-structures. Full dynamic interaction was considered between the NSCs and P-structures. A set of seven natural bi-directional ground motions were used to evaluate the seismic response of the NSCs. The numerical results show that the acceleration response of the NSCs depends on the investigated parameters. The accelerations of the NSCs attached to the flexible sides of the P-structures increased with the increase in peak ground acceleration and P-structure eccentricity ratio but decreased with the increase in NSC damping ratio. Comparison between the FE results and Eurocode 8 (EC8) predictions suggests that, under tuned conditions, EC8 provisions underestimate the seismic response of the NSCs mounted on the flexible sides of the plan-irregular RC P-structures.

Item Details

Item Type:Refereed Article
Keywords:dynamic analysis, eccentricity ratio, Eurocode 8, finite element, irregular RC buildings, nonstructural components, torsion
Research Division:Engineering
Research Group:Civil Engineering
Research Field:Earthquake Engineering
Objective Division:Construction
Objective Group:Construction Design
Objective Field:Civil Construction Design
Author:Chan, AHC (Professor Andrew Chan)
ID Code:100992
Year Published:2015
Deposited By:Office of the School of Engineering
Deposited On:2015-06-04
Last Modified:2015-06-10
Downloads:0

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