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

Liu, Ziqing; Wang, Yuzhuo; Li, Guoqiang; Jian, Jiang; Chen, Fu

doi:10.1016/j.firesaf.2019.102857

Cited by 16 publications

(10 citation statements)

References 3 publications

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“…To further evaluate the post-fire behavior of cross-shaped SRC columns, the test data published by Liu et al [29] was selected for comparison with the simulation results. Fig.…”

Section: Description Of Specimensmentioning

confidence: 99%

“…Liu et al [29] conducted mechanical property tests on materials of concrete and steel. Table 2 summarizes the compressive strength and Young's modulus of concrete, while Table 3 provides the detailed test results of steel.…”

Section: Materials Propertiesmentioning

confidence: 99%

“…A formula for calculating the remain bearing capacity of T-shaped columns after high temperature was proposed. Liu et al [29] completed the post-fire test of cross-shaped SRC columns. Due to the restriction of fire test cost and instrument, the parameter study of cross-shaped columns after exposure to high temperature was limited.…”

Section: Introductionmentioning

confidence: 99%

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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 further evaluate the post-fire behavior of cross-shaped SRC columns, the test data published by Liu et al [29] was selected for comparison with the simulation results. Fig.…”

Section: Description Of Specimensmentioning

confidence: 99%

Section: Materials Propertiesmentioning

confidence: 99%

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

2023

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“…Liu et al experimentally researched the characteristics of axially restrained steel beams in fire conditions (Liu et al , 2002). Ziqing Liu et al lead both experimental and analytical investigation on the enduring strength of steel-reinforced concrete cross-shaped columns in the cooling phase after exposing it to high temperature (Liu et al , 2019). Different fin plate connections are also experimented to study their behavior due to fire (Yu et al , 2011; Yu et al , 2009; Kim et al , 2019).…”

Section: Steel Structuresmentioning

confidence: 99%

A review on research of fire-induced progressive collapse on structures

Vishal

Satyanarayanan

2021

JSFE

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Purpose This paper delineates a literature review on fire-induced progressive collapse on structures and the effect of high temperature on structures and elements. After the occurrences of fire in the World Trade Center in the USA, the researchers started concentrating on the progressive collapse that happens due to high temperature. Currently, most of the researchers are working on fire-induced progressive collapse on structures using high-temperature behavior on materials which are used for construction. The researchers have been doing an intensive study to find a better strategy to prevent the building from structural fire damage or collapse with available codes and guidelines throughout the world. This paper aims to provide a better understanding and analytical solutions on the basis of the recent works done by researchers in fire-induced progressive collapse and methods adopted to find the collapse mechanism. Design/methodology/approach This paper is written by studying different literature papers of 109 related to progressive collapse on structures and fire-induced progressive collapse. Findings The behavior of structures due to high temperature and collapse conditions due to fire in different scenarios is identified. Originality/value This paper fulfills an identified need to study how the structure can withstand high-temperature conditions in our day-to-day lives.

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“…Reinforced concrete (RC) structures may suffer fire, earthquake [1][2][3][4], or dynamic loads during the life cycle. In case of fire, the mechanical properties of steel bars and concrete, which are the constituent materials of the RC structure, will degrade [5][6][7], the concrete may burst at high temperatures [8][9][10], and serious redistribution of internal forces will occur in the structures, resulting in a significant decline in the bearing capacity of RC structures [11][12][13]. It is common for earthquakes/dynamic loads to occur simultaneously or sequentially with fires, such as the Loma Prieta earthquake in 1989 [14], the Northridge earthquake in 1994 [15], and the Kobe earthquake in 1995 [16].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Reinforced Concrete Columns under Simultaneously Combined Fire and Cyclic Loads

Chen

Jiang

2022

Buildings

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Reinforced concrete (RC) structures could suffer from the combined action of fires, earthquakes, and other loads during their life cycle; more importantly, coupled disasters lead to further deterioration and damage to structural performance. This paper investigated the multiple performances and distinguished the safe working conditions of the RC column subjected to simultaneously combined fire and cyclic loads. The numerical model considered the degradation of the mechanical properties of steel and concrete and the bond-slip performance between steel and concrete at high temperatures. The results show that the performance of RC columns with different section sizes, longitudinal reinforcement ratios, cover thicknesses, axial load ratios, and cyclic loads differs greatly under simultaneously combined fire-cyclic loads. In specific, when the cyclic load application time is less than 2 h, the cyclic load has little effect on the response of the RC column. According to the different characteristics of RC columns when subjected to combined fire-cyclic loads, the firing process of RC columns is divided into four stages. To avoid the excessive performance degradation of RC columns, the minimum designed fire resistance time of RC columns is recommended to be 2.5 times the fire resistance time of the RC column under static loads.

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

Cited by 16 publications

References 3 publications

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

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

A review on research of fire-induced progressive collapse on structures

Performance Evaluation of Reinforced Concrete Columns under Simultaneously Combined Fire and Cyclic Loads

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