End effect on determining shear modulus of timber beams in torsion tests

Gharavi, Niaz; Zhang, Hexin; Xie, Yanjun; He, Tao

doi:10.1016/j.conbuildmat.2017.12.191

Cited by 12 publications

(17 citation statements)

References 11 publications

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“…The density, MOE and MOR results for the C24 timber are within the range of the previous studies. The shear modulus matches the previous study [15] but is significantly different from the values specified in EN 338 [21] and EN 14080 [22]. The C24 timber lumbers were purchased from a commercial supplier.…”

Section: Four-point Bending Test Resultssupporting

confidence: 68%

“…The shear modulus is measured by the shear field test [14] enhanced by the photogrammetry method. Due to the multi-point/region measuring capacity, the photogrammetry method is widely used in the surface displacement measuring for timber structures [15][16][17]. Furthermore, three-point bending tests were conducted with smaller VLHBs made from offcuts of the LBL, without any butt-joints, to compare against the hybrid beams with butt-joints.…”

Section: Introductionmentioning

confidence: 99%

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The Impact and Modelling of Concentrated Butt-Joints on Vertically Laminated Bamboo-Timber Hybrid Bio-Flitch Beams

Zhang

Gharavi

Wong

et al. 2021

Preprint

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This paper presents the experimental and analytical studies to investigate the impact of concentrated laminated bamboo butt-joints on the flexural properties of vertically laminated bamboo-timber hybrid beams (VLHBs, or flitch beam). The experimental results reveal that the concentrated butt-joints significantly reduce the flexural strength of the VLHB. They also suggest that the failure mechanism of the VLHBs with or without concentrated butt-joints are completely different. In addition, laminated bamboo lumber with concentrated butt-joints was found to be unsuitable for structural applications. The analytical estimations show close agreement with the experimental results. However, due to the layout of the sample VLHB, the experimental study cannot confirm the impact of the butt-joints on the modulus of elasticity in bending.

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Section: Four-point Bending Test Resultssupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

The Impact and Modelling of Concentrated Butt-Joints on Vertically Laminated Bamboo-Timber Hybrid Bio-Flitch Beams

Zhang

Gharavi

Wong

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The system works by taking two images of a scene of interest simultaneously from di_erent positions and angles. The employed system has described in details in Gharavi et al [4].…”

Section: Stereo Vision Systemmentioning

confidence: 99%

“…The diagonals deformation is defined as the shear deformation of the beam. The shear field test method was included in BS EN 408 [1] following Brandner et al [3,4] recommendations for determining the shear modulus of structural timber and glue laminated timber. It has been instructed to measure the shear distortion of the beam at the middle of the constant shear span by measuring the changes in diagonals of the marked square ( Figure 1) when subjected to flexural loading.…”

Section: Introductionmentioning

confidence: 99%

Shear Field Size Effect on Determining the Shear Modulus of Glulam beam

Gharavi¹

2018

RDMS

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“…The shear modulus is measured by the shear field test [14] enhanced by the photogrammetry method. Due to the multi-point/region measuring capacity, the photogrammetry method is widely used in the surface displacement measuring for timber structures [15][16][17]. Furthermore, three-point bending tests were conducted with smaller BTFB made from offcuts of the LBL, without any butt-joints, to compare against the hybrid beams with butt-joints.…”

mentioning

confidence: 99%

Effect of concentrated Butt-Joints on flexural properties of laminated Bamboo-Timber flitch beams

Zhang

Gharavi

Wong

et al. 2021

Jnl of Sandwich Structures & Materials

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This paper presents the experimental and analytical studies to investigate the effect of concentrated butt-joints on the flexural properties of laminated bamboo-timber flitch beam (BTFB, or bio-flitch beam). The experimental results reveal that the concentrated butt-joints significantly reduce the flexural strength of the BTFB. They also suggest that the failure mechanism of the BTFB with or without concentrated butt-joints are completely different but less evidence shows an obvious effect of the butt-joints on the modulus of elasticity in bending. In addition, laminated bamboo lumber with concentrated butt-joints is found to be unsuitable for structural applications. The analytical predictions are in close agreement with the experimental results that demonstrate the potentials of the proposed analytical model as a forensic investigation instrument to estimate the strength reduction of the structure, if the butt-jointed laminated bamboo was, unfortunately, used in construction.

show abstract

End effect on determining shear modulus of timber beams in torsion tests

Cited by 12 publications

References 11 publications

The Impact and Modelling of Concentrated Butt-Joints on Vertically Laminated Bamboo-Timber Hybrid Bio-Flitch Beams

The Impact and Modelling of Concentrated Butt-Joints on Vertically Laminated Bamboo-Timber Hybrid Bio-Flitch Beams

Shear Field Size Effect on Determining the Shear Modulus of Glulam beam

Effect of concentrated Butt-Joints on flexural properties of laminated Bamboo-Timber flitch beams

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