Study on the strength of glued laminated timber beams with round holes: proposal of the design formula for the splitting strength, Journal of Wood Science

When a glued laminated timber (GLT) beam with a round hole is subjected to a shear force and bending moment, the hole will crack and fail due to a large tensile stress perpendicular to the grain and shear stresses. If the stresses acting on the hole are known, it is possible to estimate the fracture load. However, it is necessary to obtain the stresses acting on the hole by finite element analysis, which is very time consuming. In this study, to easily estimate the fracture load, we proposed a formula to estimate the bearing capacity at the time of a hole fracture by obtaining the stress acting on the hole through finite element analysis and an approximate formula. The validity of the proposed formula was verified using the existing experimental data of a GLT beam. As a result, it was confirmed that the proposed equation can estimate the fracture load of GLT beams in Japan and that the proposed equation can estimate the fracture load of GLT beams in countries other than Japan with some accuracy.

Experimental investigation of the axial strength of glued-in rods in cross laminated timber

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Glulam, Laminated Timber Wood Beams & Columns

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Study on the strength of glued laminated timber beams with round holes: proposal of the design formula for the splitting strength, Journal of Wood Science

International Council For Research and Innovation in Building and Construction Working Commission W18 - Timber Structures, PDF, Strength Of Materials

PDF] The strength of glulam beams with holes - A survey of tests and calculation methods

Experimental investigation of the axial strength of glued-in rods in cross laminated timber

Study on the strength of glued laminated timber beams with round holes: proposal of the design formula for the splitting strength, Journal of Wood Science

PDF] The strength of glulam beams with holes - A survey of tests and calculation methods