Effect of Uncertainties in Material and Structural Detailing on the Seismic Vulnerability of RC Frames Considering Construction Quality Defects

Kim, Siyun; Moon, Taehwan; Kim, Sung Jig

doi:10.3390/app10248832

Cited by 10 publications

(6 citation statements)

References 20 publications

(23 reference statements)

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“…[8,9]) and Concrete02 (e.g. [8][9][10]) are also adopted here. The Steel02 is a bi-linear response envelope based on the Giuffré-Menegotto-Pinto [11] model, which accounts for the strain hardening and has three key properties: the yield strength, the modulus of elasticity and the strain hardening ratio.…”

Section: Seismic Analysismentioning

confidence: 99%

Simplified Model for Pre-Code RC Column exposed to Fire Followed by Earthquake

Ιωάννου

Rossetto

Rush

et al. 2022

Preprint

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The behaviour of pre-code RC columns in sequence of fire and earthquake is not well understood and can be critical in case of buildings which experienced fire and are either unrepaired or poorly repaired when exposed to an earthquake. This study proposes a framework on how to construct a simplified model to assess the post-fire cyclic behaviour of such columns. Emphasis is given to the development of simplified material models which can be used to describe the performance of the confined concrete, as its post-fire behaviour is not well studied. The model’s performance is validated against the experimental results of a square, non-seismically designed RC column. Three scenarios are considered. The reference scenario, where the column is exposed only to cyclic loading. In the other two, the column is firstly exposed to an ISO-834 time-temperature curves in a furnace of 30min and 90min duration and after it cooled down, it is then exposed to cyclic loading. The results showed that simplified material models can be used to capture the post-fire cyclic behaviour of an RC column, built without seismic design. It was also found that the confined model adopted played an important role after the peak strength is reached.

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Section: Seismic Analysismentioning

confidence: 99%

Simplified Model for Pre-Code RC Column exposed to Fire Followed by Earthquake

Ιωάννου

Rossetto

Rush

et al. 2022

Preprint

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show abstract

“… 13 , 14 ) and Concrete02 (e.g. 13 – 15 ) are also adopted here. The Steel02 is a bi-linear response envelope based on the Giuffré–Menegotto–Pinto 16 model, which accounts for the strain hardening and has three key properties: the yield strength, the modulus of elasticity and the strain hardening ratio.…”

Section: Framework For Modelling Post-fire Cyclic Behaviour Of Rc Columnmentioning

confidence: 99%

Simplified model for pre-code RC column exposed to fire followed by earthquake

Ιωάννου¹,

Rossetto²,

Rush

et al. 2022

Sci Rep

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The behaviour of pre-code reinforced concrete (RC) columns in sequence of fire and earthquake is not well understood and can be critical in case of buildings which experienced fire and are either unrepaired or poorly repaired when exposed to an earthquake. This study proposes a framework on how to construct a simplified model to assess the post-fire cyclic behaviour of such columns. Emphasis is given to the development of simplified material models which can be used to describe the performance of the confined concrete, as its post-fire behaviour is not well studied. The model’s performance is validated against the experimental results of a square, non-seismically designed RC column. Three scenarios are considered. The reference scenario, where the column is exposed only to cyclic loading. In the other two, the column is firstly exposed to an ISO-834 time–temperature curves in a furnace of 30 min and 90 min duration and after it cooled down, it is exposed to cyclic loading. The results showed that simplified material models can be used to capture the post-fire cyclic behaviour of an RC column, built without seismic design. It was also found that the confined model adopted played an important role after the peak strength is reached.

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“…The most recent research works can be mentioned like Vamvatsikos and Fragiadakis [8] who used Monte Carlo simulations with Latin-Hypercube sampling to assess the effects of uncertainties in model parameters on collapse response of structures. Na et al [9], Celik and Ellingwood [10], Celarec and Dolšek [11], Kim et al [12] studies reveal that uncertainties of the mass of the structure, the concrete strength, the columns yield rotation and the effective slab width have lesser importance.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Analysis of Uncertain Material RC Structure and Soil Parameters on Seismic Response of Soil-Structure Interaction Systems

Mekki

Zoutat

Elachachi

et al. 2022

Period. Polytech. Civil Eng.

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In seismic performance based design context, engineers are faced to a difficult task to estimate the response of soil-structure interaction (SSI) systems. To accomplish this task successfully, all sources of random and epistemic uncertainties should be taken into account. However, the uncertain parameters have not the same influence on the model response; a sensitivity analysis is therefore required. This article treats the two following aspects: the first one is to perform a sensitivity analysis on all the parameters in order to study their influence on the structural response. The uncertainties effect is done by studying the sensitivity of the maximum structure displacement towards the used materials parameters variation (fc’, εc0, εcu, Es, fsy, α, εsu, A, ξ) and soil properties (ξg, ν) on the SSI seismic response. This study consists of determining, quantifying and analyzing how the outputs of the N2-SSI model are affected by input variables fluctuations. The second aspect is analysing the SSI system response by considering the correlation between the parameters (shear wave velocity and soil damping) and the influence of the lack knowledge of the uncertainties due to this correlation. The results of the sensitivity analysis indicate that the response of the structure is very sensitive to the concrete and steel parameters for larger values of the shear wave velocity. While, the soil damping and Poisson's ratio in the case of soil with shear wave velocity of 90 m/s, are the main inputs with the greatest influence on the maximum displacement output.

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Effect of Uncertainties in Material and Structural Detailing on the Seismic Vulnerability of RC Frames Considering Construction Quality Defects

Cited by 10 publications

References 20 publications

Simplified Model for Pre-Code RC Column exposed to Fire Followed by Earthquake

Simplified Model for Pre-Code RC Column exposed to Fire Followed by Earthquake

Simplified model for pre-code RC column exposed to fire followed by earthquake

Sensitivity Analysis of Uncertain Material RC Structure and Soil Parameters on Seismic Response of Soil-Structure Interaction Systems

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