Dynamical behavior of a wooden beam under mechanical loading and fire

Nubissie, A.; Ngamie, A. Ndoukouo; Woafo, P.

doi:10.1016/j.matdes.2010.09.020

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…is model can predict the fire resistance of argillite rock compared with those results in other element structures such as wood beam [22], steel beam [23], granite rock [24], and sandstone rock [25], which are most adequate for engineering project in order to perform the safety time and avoid the damage of structure…”

Section: Case Of Rock Materials In Whichmentioning

confidence: 99%

“…However, few theoretical studies had been done and numerical results in this field were obtained. For instance, Nubissie et al [22] investigated the dynamic behavior of a wooden beam under mechanical loading and fire. e authors established one model that takes into account the variation of physicomechanical parameters of wooden beam as a function of temperature.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Numerical Analysis in 3D of Anisotropic and Nonlinear Mechanical Behavior of Tournemire Argillite under High Temperatures and Dynamic Loading

Marius

Leroy

Nicolas

2020

The Scientific World Journal

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This work proposes a model that takes into account the anisotropy of material with its inhomogeneity and geometrical and material nonlinearities. According to Newton’s second law, the investigations were carried out on the simultaneous effects of mechanical load and thermal treatment on the Tournemire argillite material. The finite difference method was used for the numerical resolution of the problem by the MATLAB 2015a software in order to determine the peak stress and strain of argillite as a function of material nonlinearity and demonstrated the inhomogeneity parameter Ω. The critical temperature from which the material damage was pronounced is 500°C. Indeed, above this temperature, the loss of rigidity of argillite reduced significantly the mechanical performance of this rock. Therefore, after 2.9 min, the stress reduction in X or Y direction was 75.5% with a peak stress value of 2500 MPa, whereas in Z direction, the stress reduction was 74.1% with a peak stress value of 1998 MPa. Meanwhile, knowing that the material inhomogeneity was between 2995 and 3256.010, there was an increase in peak stress of about 75%. However, the influence of the material nonlinearity was almost negligible. Thus, the geometrical nonlinearity allows having the maximal constant strain of about 1.25 in the direction of the applied dynamic mechanical force.

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Section: Case Of Rock Materials In Whichmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and Numerical Analysis in 3D of Anisotropic and Nonlinear Mechanical Behavior of Tournemire Argillite under High Temperatures and Dynamic Loading

Marius

Leroy

Nicolas

2020

The Scientific World Journal

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“…The center point starts to be deformed substantially until the strain reaches a maximum value of 0.013 m. The more the specimen is heated, the more the stress is transmitted irreversibly from the end towards the center. The rapid increase of the vertical strain can then indicate imminent collapse Nubissie et al, 2011).…”

Section: Numerical Analysismentioning

confidence: 99%

“…Recently, Nubissie et al (2011) numerically studied the mechanical properties of wooden and steel beams under fire and mechanical loading, respectively. They predicted the collapse time of wooden and steel structures.…”

Section: Introductionmentioning

confidence: 99%

“…Inspired by the works of Nubissie et al (2011) andNdoukouo et al (2011), we report numerical investigations of mechanical properties of granite rock specimen under combined effects of high temperature and mechanical loading. We choose the granite rock specimen due to the fact that it is largely used in civil engineering, for example, building of railway, road and tunnels.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and numerical analysis of granite rock specimen under mechanical loading and fire

Leroy

Ndop

Ndjaka

2015

Journal of Rock Mechanics and Geotechnical Engineering

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a b s t r a c tThe effect of ISO 834 fire on the mechanical properties of granite rock specimen submitted to uniaxial loading is numerically investigated. Based on Newton's second law, the rate-equation model of granite rock specimen under mechanical load and fire is established. The effect of heat treatment on the mechanical performance of granite is analyzed at the center and the ends of specimen. At the free end of granite rock specimen, it is shown that from 20 C to 500 C, the internal stress and internal strain are weak; whereas above 500 C, they start to increase rapidly, announcing the imminent collapse. At the center of specimen, the analysis of the internal stress and internal strain reveals that the fire reduces the mechanical performance of granite significantly. Moreover, it is found that after 3 min of exposure to fire, the mechanical energy necessary to fragment the granite can be reduced up to 80%.

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A review of structural, thermo-physical, acoustical, and environmental properties of wooden materials for building applications

Asdrubali

Ferracuti

Lombardi

et al. 2017

Building and Environment

231

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Dynamical behavior of a wooden beam under mechanical loading and fire

Cited by 6 publications

References 9 publications

Modeling and Numerical Analysis in 3D of Anisotropic and Nonlinear Mechanical Behavior of Tournemire Argillite under High Temperatures and Dynamic Loading

Modeling and Numerical Analysis in 3D of Anisotropic and Nonlinear Mechanical Behavior of Tournemire Argillite under High Temperatures and Dynamic Loading

Modeling and numerical analysis of granite rock specimen under mechanical loading and fire

A review of structural, thermo-physical, acoustical, and environmental properties of wooden materials for building applications

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