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Experimental study on bending behavior of glulam beams strengthened with bamboo scrimber

Tong Wang (School of Civil Engineering, Northeast Forestry University, Harbin, China)
Jing Di (School of Civil Engineering, Northeast Forestry University, Harbin, China)
Hongliang Zuo (School of Civil Engineering, Northeast Forestry University, Harbin, China)

International Journal of Structural Integrity

ISSN: 1757-9864

Article publication date: 19 October 2021

Issue publication date: 12 January 2022

97

Abstract

Purpose

In view of the defects of glued wood beams, a new composite member – reconstituted bamboo board reinforced glued wood beams is proposed to improve the bearing capacity of glued wood beams.

Design/methodology/approach

The bending test studied the ordinary glulam beams and the reinforced glulam beams with different layer numbers and different layer thicknesses by comparing with six kinds of glulam beams strengthened with bamboo scrimber and one kind of ordinary glulam beams and used the method of third-point stepwise loading on the glulam beams strengthened with bamboo scrimber.

Findings

The bamboo scrimber improved the bending behavior of the ordinary glulam beams. The 10 mm bamboo scrimber layer can meet the requirements of the maximum ultimate bending capacity and minimize the defects. So 10 mm bamboo scrimber layer was the optimal thickness. During the loading process, the strain change of the normal section of the reconstituted bamboo board reinforced glued wood beam basically conforms to the plane section assumption.

Originality/value

The bending rigidities of the glulam beams strengthened with bamboo scrimber increased up to 28.25%, 8.53% and 76.67%, and the ultimate bending capacity increased from 83.44% to 99.34% with the increase of the bamboo scrimber plate layers (the replacement rate). The ultimate bending capacities and the bending rigidities of the glulam beams strengthened with bamboo scrimber increased to 52.32%∼60.18% and 90.07%∼99.34% with the changing of the bamboo scrimber thicknesses from 7.1 mm to 25 mm.

Keywords

Acknowledgements

The authors gratefully acknowledge the financial support provided by the Science Foundation of Heilongjiang Province (LH2020E009).

Citation

Wang, T., Di, J. and Zuo, H. (2022), "Experimental study on bending behavior of glulam beams strengthened with bamboo scrimber", International Journal of Structural Integrity, Vol. 13 No. 1, pp. 44-56. https://doi.org/10.1108/IJSI-03-2021-0037

Publisher

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Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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