Energy-based time equivalent method for evaluating the fire resistance of timber–concrete composite structures exposed to travelling fires

Zhang, Yongwang; Wang, Lu

doi:10.1080/15732479.2022.2127795

Cited by 8 publications

(2 citation statements)

References 36 publications

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“…Most of the existing studies on the fire performance of timber structures focus on determining the effective carbonization rate [8][9][10][11][12][13][14][15][16][17]. A charring layer formed after hightemperature pyrolysis of wood can prevent heat transfer to the interior of the wood.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on Progressive Collapse of the Midcolumn in a Glulam Timber Frame Exposed to Fire

Huang,

Wang

2023

Fire

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This paper presents experimental and numerical investigations on the progressive collapse behavior of a two-story glulam frame when the middle column is exposed to ISO834 standard fire. The stress characteristics, temperature distributions, and deformation relationship curves of the bottom middle column after a fire are obtained. The collapse resistance performance and the mechanism of the glulam structure under local fire are studied in combination with the failure mode of the frame. The experimental results show that the failure time of the middle column in fire is 16.8 min, and the time to determine the progressive collapse of the structure is 17.17 min when the rotation angle exceeds the limit. The structure can remain stable for some time after the failure of the fire column, but as the fire continues to spread, the structure will collapse further. In addition, a temperature-field analysis model with the grid element type of DC3D8 and a structural field analysis model with the grid element type of C3D8R was established by using ABAQUS software under the experimental conditions. The numerical simulation is carried out by means of thermal–mechanical sequential coupling. The numerical simulation results show that the temperature of the beam end rose to more than 300 °C in about 15 min although it was not directly exposed to fire. The temperature of the whole connector at the pillar foot in the bottom column reached more than 700 °C when the fire time reached 60 min. The numerical simulation results agree well with the experimental results. The analysis results show that, in the failure process of the fire column, the junction of beam ends begins to produce stretching force to form a catenary effect. As the fire time increases, the catenary effect eventually fails. The stretching force at the beam end rapidly decreases and withdraws from the work, causing the progressive collapse of the frame.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on Progressive Collapse of the Midcolumn in a Glulam Timber Frame Exposed to Fire

Huang,

Wang

2023

Fire

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“…Liu et al [12] conducted a research study which presents temperature resistance test results of three large-scale TCC floor specimens and the development of a finite element modeling methodology for TCC floors under temperature-mechanical coupling effects. Zhang and Wang [13] proposed an energy-based time equivalent method and validated its effectiveness via experiments. This method can be used to evaluate the fire resistance of TCC structures under the improved travelling fires methodology's fire conditions.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis on Thermo-Mechanical Bending Behavior of Timber–Concrete Composite Beams

Guan,

Dai,

Zhang

et al. 2023

Buildings

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In this study, an analytical approach is introduced for predicting the bending behavior of a timber–concrete composite (TCC) beam subjected to a mechanical load and a non-uniform temperature field, in which the orthotropy of timber as well as interfacial slip are taken into consideration. The analytical model addresses the non-uniform temperature field using Fourier series expansion based on the heat transport theory. The stresses and displacements of the TCC beam under the thermo-mechanical condition are governed by the thermo-elasticity theory, and the corresponding solution is derived analytically by solving a group of non-homogeneous partial differential equations. The proposed solution is in good agreement with the finite element solution and exhibits higher accuracy compared to the Euler–Bernoulli beam solution that relies on the assumption of transverse shear deformation and isotropy. An extensive investigation is carried out to analyze how the bending behavior of TCC beams is influenced by variations in interfacial shear stiffness and temperature field.

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Experimental and theoretical study of fire resistance of steel slag powder concrete beams

Zhang,

Yuan,

Zhang

et al. 2025

Engineering Structures

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Energy-based time equivalent method for evaluating the fire resistance of timber–concrete composite structures exposed to travelling fires

Cited by 8 publications

References 36 publications

Experimental and Numerical Study on Progressive Collapse of the Midcolumn in a Glulam Timber Frame Exposed to Fire

Experimental and Numerical Study on Progressive Collapse of the Midcolumn in a Glulam Timber Frame Exposed to Fire

Theoretical Analysis on Thermo-Mechanical Bending Behavior of Timber–Concrete Composite Beams

Experimental and theoretical study of fire resistance of steel slag powder concrete beams

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