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

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