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Appl. Sci. 2018, 8(4), 479; doi:10.3390/app8040479

Seismic Response of a Three-Dimensional Asymmetric Multi-Storey Reinforced Concrete Structure

1
Department of Civil Engineering, Hongik University, Seoul 04066, Korea
2
Department of Structural Systems & Site Safety Evaluation, Korea Institute of Nuclear Safety, Daejeon 34142, Korea
3
Daelim Industrial Corporation Ltd., Seoul 03152, Korea
*
Author to whom correspondence should be addressed.
Received: 28 January 2018 / Revised: 12 March 2018 / Accepted: 19 March 2018 / Published: 22 March 2018
(This article belongs to the Section Mechanical Engineering)

Abstract

This study discusses the seismic behavior of a geometrically asymmetric three-storey reinforced concrete (RC) building, considering torsional effect and material nonlinearity. The building is a test structure that was used for seismic performance evaluation in the SMART 2013 (Seismic design and best-estimate Methods Assessment for Reinforced concrete buildings subjected to Torsion and nonlinear effects) international benchmark. To begin with, nonlinear stress–strain relationships that were set up for concrete and reinforcing steel are validated by finite element local tests with a representative volume element. A modal analysis shows that the first three calculated natural frequencies are close to the ones that are obtained by modal experiments. The finite element modeling is further validated by comparing the calculated displacement and acceleration due to a low-intensity ground motion with the responses from the corresponding shaking table test. Using the validated model, a blind nonlinear seismic analysis is performed for a series of Northridge earthquakes in order to estimate the behavior of the asymmetric RC structure to high-intensity ground motions. The calculated displacement and acceleration, as well as their response spectra at various sampling points, agree well with the results of a three-dimensional benchmark shaking table test. By investigating the seismic torsional behavior of the asymmetric RC structure, it is shown that the seismic response of an asymmetric structure is larger than that of a hypothetical symmetric structure. The result indicates that a larger seismic response should be considered in the seismic design of an asymmetric structure compared to a symmetric structure with similar design conditions. View Full-Text
Keywords: asymmetric reinforced concrete structure; SMART 2013 international benchmark; finite element model; nonlinear seismic analysis; seismic torsional behavior asymmetric reinforced concrete structure; SMART 2013 international benchmark; finite element model; nonlinear seismic analysis; seismic torsional behavior
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Lim, H.-K.; Kang, J.W.; Pak, H.; Chi, H.-S.; Lee, Y.-G.; Kim, J. Seismic Response of a Three-Dimensional Asymmetric Multi-Storey Reinforced Concrete Structure. Appl. Sci. 2018, 8, 479.

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