Performance of Steel-Reinforced Concrete Column after Exposure to Fire: FEA Model and Experiments

Han, Lin-Hai; Zhou, Kan; Tan, Qing-Hua; Song, Tian-Yi

doi:10.1061/(asce)st.1943-541x.0001511

Cited by 28 publications

(18 citation statements)

References 13 publications

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“…Song et al [11] developed an FE model to predict the load versus deformation relationships of CFST stub columns subjected to a combination of temperature and axial compression. Han et al [12] developed an FE model to study the postfire performance of SRC columns subjected to both loading and fire phases. User-defined subroutines were adopted to automatically select the appropriate constitutive model during each of the four phases.…”

Section: Universitat Politècnica De Valènciamentioning

confidence: 99%

“…To fill this research gap, this paper focuses on the influence of combined fire and loading on the response of CFSST columns by FE modelling. In this paper, an entire time (t)-load (N)temperature (T) path including ambient temperature loading, heating and cooling under constant load, and post-fire loading stages, which has been adopted in previous research [10][11][12], is employed. The following approach is taken in this paper:…”

Section: Universitat Politècnica De Valènciamentioning

confidence: 99%

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Analysis of concrete-filled stainless steel tubular columns under combined fire and loading

Tan

Gardner

Han

et al. 2018

Proceedings 12th International Conference on Advances in Steel-Concrete Composite Structures - ASCCS 2018

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In fire scenarios, concrete-filled stainless steel tubular (CFSST) columns undergo initial loading at ambient temperature, loading during the heating phase as the fire develops, loading during the cooling phase as the fire dies out and continual loading after the fire. CFSST columns may fail some points during this process under combined fire and loading. In this paper, the failure modes and corresponding working mechanism of CFSST columns subjected to an entire loading and fire history are investigated. Sequentially coupled thermal-stress analyses in ABAQUS are employed to establish the temperature field and structural response of the CFSST column. To improve the precision of the finite element (FE) model, the influence of moisture on the thermal conductivity and specific heat of concrete during both the heating and cooling phases is considered using subroutines. Existing fire and post-fire test data of CFSST columns are used to validate the FE models. Comparisons between predicted and test results confirm that the accuracy of the FE models is acceptable; the FE models are then extended to simulate a typical CFSST column subjected to the entire loading and fire history. The behaviour of the CFSST column is explained by analysis of the temperature distribution, load versus axial deformation curves and failure response.

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Section: Universitat Politècnica De Valènciamentioning

confidence: 99%

Section: Universitat Politècnica De Valènciamentioning

confidence: 99%

Analysis of concrete-filled stainless steel tubular columns under combined fire and loading

Tan

Gardner

Han

et al. 2018

Proceedings 12th International Conference on Advances in Steel-Concrete Composite Structures - ASCCS 2018

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“…The study found that the composite columns without axial restraint showed a sudden collapse, unlike those with thermal restraint that presented in the "constraint force x time" graph, a softer drop. Han et al [16,17], through experimental tests and numerical analysis, described the behavior of encased composite columns under fire action. The first study [16] proposes a simplified method, based on parametric analysis performed by numerical modelling, to determine the columns fire resistance, while the second article [17] increased the knowledge regarding the post-fire behavior of these structural elements.…”

Section: Introductionmentioning

confidence: 99%

“…Han et al [16,17], through experimental tests and numerical analysis, described the behavior of encased composite columns under fire action. The first study [16] proposes a simplified method, based on parametric analysis performed by numerical modelling, to determine the columns fire resistance, while the second article [17] increased the knowledge regarding the post-fire behavior of these structural elements. The works presented above considered in its analysis the behavior of isolated steel columns and steel and concrete composite columns separately.…”

Section: Introductionmentioning

confidence: 99%

Numerical comparison between the thermo-structural behavior of steel and partially encased steel and concrete composite columns in fire

Simões

Rocha

Neto

2018

Rev. IBRACON Estrut. Mater.

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The bare steel structural members have a low fire resistance. However, in steel and concrete composite members, the concrete encasement, besides the contribution to the stiffness of the whole system, reduces the amount of heat that reaches the steel profile, increasing the its fire resistance. The aim of this paper is to conduct a numerical study on the behavior of steel and steel and concrete composite columns in fire, in order to compare their performance based on the variation of parameters such as the stiffness of the surrounding structure, geometric imperfection and load ratio. It has been found that, in general, the intensity of the geometric imperfection and stiffness of the surrounding structure does not affect the fire resistance of steel and composite columns. However, the stiffness of the surrounding structure raised the maximum value of the restraining forces generate throughout the heating. Regarding the load ratio, when increased, the fire resistance and critical temperature decreased.

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“…Além disso, foi utilizada a indicação ISO para o caso do pilar aquecido uniformemente em todas as faces. Características dos pilares mistos utilizados na modelagem numérica Análises Numéricas Realizadas em Contexto Térmico as armaduras foram modeladas com elementos de barra T3D2, truss elements, com dois nós em cada extremidade, de forma a seguir a mesma metodologia empregada emHan et al (2015Han et al ( , 2016) para modelagem numérica de pilares mistos.…”

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Análise numérica de pilares mistos de aço e concreto isolados e inseridos em paredes em situação de incêndio

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Performance of Steel-Reinforced Concrete Column after Exposure to Fire: FEA Model and Experiments

Cited by 28 publications

References 13 publications

Analysis of concrete-filled stainless steel tubular columns under combined fire and loading

Analysis of concrete-filled stainless steel tubular columns under combined fire and loading

Numerical comparison between the thermo-structural behavior of steel and partially encased steel and concrete composite columns in fire

Análise numérica de pilares mistos de aço e concreto isolados e inseridos em paredes em situação de incêndio

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