Seismic behavior of steel reinforced concrete cross-shaped columns after exposure to high temperatures

Wang, Yuzhuo; Xu, Tiangui; Liu, Ziqing; Li, Guoqiang; Jian, Jiang

doi:10.1016/j.engstruct.2020.111723

Cited by 14 publications

(6 citation statements)

References 20 publications

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“…Scholars have also introduced special-shaped columns made of steel tubes filled with concrete, aiming to further enhance the application of CFST columns in building structures. Extensive tests, theoretical studies and finite element analyses worldwide have explored the mechanical properties of L [ 10 , 11 ], T [ [12] , [13] , [14] ] and cross-shaped [ [15] , [16] , [17] , [18] , [19] ] CFST columns. These investigations consistently demonstrate the excellent load capacity and seismic performance of CFST special-shaped columns, with the cross section being particularly prevalent.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis and bearing capacity calculation of cross-shaped CFST columns under compressive load

Yang,

Yu,

Qiu

et al. 2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

Finite element analysis and bearing capacity calculation of cross-shaped CFST columns under compressive load

Yang,

Yu,

Qiu

et al. 2024

Heliyon

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“…Unfortunately, high-rise building fires are not uncommon, posing a serious threat to people's safety. After exposed to fire, the strength and rigidity of the steel-concrete composite members are lost, so it is essential to reevaluate the residual bearing capacity to take appropriate reinforcement measures to ensure that the structure can withstand the corresponding load [1][2][3][4] and continue to put into use. However, the core issue of repair assessment is how to determine the residual bearing capacity of the structure after fire, which has not been resolved yet.…”

Section: Introductionmentioning

confidence: 99%

Post-Fire Behavior of Cross-Shaped Steel Reinforced Concrete Columns: Simulation and Analytical Expressions

2023

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In order to explore the behavior of cross-shaped steel reinforced concrete (SRC) columns after fire, the heat transfer analysis model and structural analysis model were established by ABAQUS software. The simulation results of the cross-shaped column were compared with the existing test results, in the aspect of the temperature distribution, time-temperature curve, failure mode, and load-displacement relationship after fire exposure. The results show that the simulation results agree well with the experimental results. The influence of critical parameters on residual bearing capacity coefficient k was discussed, which including constant heating duration, maximum heating temperature, concrete strength, yield strength of section steel, yield strength of rebars, limb thickness, effective column length, rebar diameter, and steel content. Finally, a simplified formula was proposed to calculate the residual bearing capacity of cross-shaped SRC columns after fire.

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“…To determine the seismic resistance of reinforced-concrete structures, the tensile properties and low-cycle fatigue behaviour of steel bars exposed to high temperatures are crucial for their application in reinforced-concrete structures subjected to fire. Investigation of the post-fire mechanical properties, low-cycle properties, and seismic performance analysis of steel bars can provide an important theoretical basis and engineering guidance for anti-seismic design of reinforced-concrete structures after a fire [14][15][16][17]. Kodur and Alogla [18] investigated changes in the mechanical properties of steel bars exposed to high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Low-cycle fatigue mashing behaviours of HTRB630 high-strength steel exposed to high temperatures

Gao,

Zhuang,

Zuo

et al. 2023

Materials Science and Technology

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The tensile test and low-cycle fatigue test of HTRB630 high-strength steel bars after high-temperature exposure were investigated. Based on the plastic strain energy density theory of mashing behaviours, the values of parameters K and n in the Ramberg–Osgood stress–strain relationship were obtained. The Coffin–Manson model was modified for further modelling of specimens exposed to different temperatures. A fitted formula for the relationship between the plastic strain energy density and fatigue life of HTRB630 high-strength steel bar specimens was established. The parameters obtained in this study can provide a reference for further investigation of the seismic performance of HTRB630 steel bars reinforced concrete structures after exposure to high temperatures.

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Seismic behavior of steel reinforced concrete cross-shaped columns after exposure to high temperatures

Cited by 14 publications

References 20 publications

Finite element analysis and bearing capacity calculation of cross-shaped CFST columns under compressive load

Finite element analysis and bearing capacity calculation of cross-shaped CFST columns under compressive load

Post-Fire Behavior of Cross-Shaped Steel Reinforced Concrete Columns: Simulation and Analytical Expressions

Low-cycle fatigue mashing behaviours of HTRB630 high-strength steel exposed to high temperatures

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