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Structural resistance of reinforced concrete buildings in areas of moderate seismicity and assessment of strategies for structural improvement

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journal contribution
posted on 27.04.2018, 08:21 by David Dominguez-Santos, Pablo Ballesteros-Perez, Daniel Mora-Melia
© 2017 by the authors. Moderate magnitude seismic events have occurred during the last decade in non-seismic areas and have highlighted that many existing buildings do not sufficiently resist these types of events. The objective of this work is to illustrate that most buildings dating from 2002-2010 constructed from wide beams, which were designed to previous earthquake resistance codes, do not offer a satisfactory seismic behaviour, and to identify which structural attributes can best help alleviate this problem. In this work the effect of a real earthquake of medium magnitude (Lorca, 2011) on buildings of three, five and eight stories with unidirectional frames of wide-beam concrete was assessed. The methodology included non-linear static (pushover) analyses and dynamic response simulations with the aim to understand the effect on the seismic performance of changing some of the geometrical and material parameters. Maximum displacements and capacity curves for the top floor of a set of representative buildings were evaluated and compared. In particular, capacity curves obtained from non-linear static (pushover) analysis are compared for different building configurations, as well as the maximum displacements obtained through non-linear dynamic analysis. This paper highlights the seismic vulnerability of buildings constructed between 2002 and 2010 and the results indicate that a higher density of infill walls (walls whose bricks are not part of the main structure) is the feature that most significantly improves the seismic behaviour of the structures analysed. Moreover, counterintuitively, incorporating stronger concrete and reinforcing steel and using alternative column arrangements only have a small positive effect on the seismic behaviour of these types of buildings.

Funding

This research was funded by the Chilean CONICYT grant under the program: FONDECYT Initiation for Research in 2014 (Project folio 11140128).

History

School

  • Architecture, Building and Civil Engineering

Published in

Buildings

Volume

7

Issue

4

Citation

DOMINGUEZ-SANTOS, D, BALLESTEROS-PEREZ, P. and MORA-MELIA, D., 2017. Structural resistance of reinforced concrete buildings in areas of moderate seismicity and assessment of strategies for structural improvement. Buildings, 7(4): 89.

Publisher

© The Authors. Published by MDPI

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/ by/4.0/

Acceptance date

03/10/2017

Publication date

2017

Notes

This is an Open Access Article. It is published by MDPI under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

eISSN

2075-5309

Language

en

Licence

Exports