Nonlinear seismic analysis of a super 13-element reinforced concrete beam-column joint model

Adom-Asamoah, Mark; Osei, Jack Banahene

doi:10.12989/eas.2016.11.5.905

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…The compressive arch action and catenary action were clearly observed in the experiments. Due to exorbitant cost and safety issues, numerical simulations are preferred for studying the progressive collapse resistance of structures [18][19][20][21][22][23], in which nonlinear static and dynamic analyses had been conducted [24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Progressive Collapse Analysis of SRC Frame-RC Core Tube Hybrid Structure

et al. 2018

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Steel reinforced concrete (SRC) frame-reinforced concrete (RC) core tube hybrid structures are widely used in high-rise buildings. Focusing on the progressive collapse behavior of this structural system, this paper presents an experiment and analysis on a 1/5 scaled, 10-story SRC frame-RC core tube structural model. The finite element (FE) model developed for the purpose of progressive collapse analysis was validated by comparing the test results and simulation results. The alternate load path method (APM) was applied in conducting nonlinear static and dynamic analyses, in which key components including columns and shear walls were removed. The stress state of the beams adjacent to the removed component, the structural behavior including inter-story drift ratio and shear distribution between frame and tube were investigated. The demand capacity ratio (DCR) was applied to evaluate the progressive collapse resistance under loss of key components scenarios. The results indicate that the frame and the tube cooperate in a certain way to resist progressive collapse. The core tube plays a role as the first line of defense against progressive collapse, and the frame plays a role as the second line of defense against progressive collapse. It is also found that the shear distribution is related to the location of the component removed, especially the corner column and shear walls.

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Section: Introductionmentioning

confidence: 99%

Progressive Collapse Analysis of SRC Frame-RC Core Tube Hybrid Structure

et al. 2018

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“…Given their highly uncertain nature, many experts (seismologists, engineers and researchers) have adopted and advocated the use of the probabilistic approach in quantifying the seismic hazard to be expected for a particular region. Once the hazard is quantified, the vulnerability of buildings [1][2][3], particular older-type reinforced concrete structures can be confidently assessed. Currently, the development of hazard maps has been crucial, and plays a fundamental role in hazard mitigation.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo Based Seismic Hazard Model for Southern Ghana

et al. 2018

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Seismic hazard assessment involves quantifying the likely ground motion intensities to be expected at a particular site or region. It is a crucial aspect of any seismic hazard mitigation program. The conventional probabilistic seismic hazard assessment is highly reliant on the past seismic activities in a particular region. However, for regions with lower rates of seismicity, where seismological data is scanty, it would seem desirable to use a stochastic modelling (Monte Carlo based) approach. This study presents a Monte Carlo simulation hazard model for Southern Ghana. Six sites are selected in order to determine their expected ground motion intensities (peak ground acceleration and spectral acceleration). Results revealed that Accra and Tema as the highly seismic cities in Southern Ghana, with Ho and Cape Coast having relatively lower seismicities. The expected peak ground acceleration corresponding to a 10% probability of exceedance in 50 years for the proposed seismic hazard model was as high as 0.06 g for the cities considered. However, at the rather extreme 2% probability of exceedance in 50 years, a PGA of 0.5 g can be anticipated. Evidently, the 2% in 50 years uniform hazard spectrum for the highly seismic cities recorded high spectral accelerations, at a natural vibrational period within the ranges of about 0.1-0.3 sec. This indicates that low-rise structures in these cities may be exposed to high seismic risk.

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