Evaluation of Out-of-plane Shear Strength of CLT made from Japanese Larch

Abstract

Three shear tests conducted on three-layer cross-laminated timber (CLT) of Japanese larch, and the effects of defects and edge-gluing of transverse layer laminae on shear strength were investigated. The shear strength obtained from three-point bending test was approximately the same as that obtained from asymmetric four-point bending test. The shear strength obtained from compression type tests was lower than that obtained from three-point bending tests, and the difference between those was significant at 5% level. The defects and edge-gluing of transverse layer laminae had no effect on the shear strength of CLT. The effects of failure process of transverse layer laminae on maximum shear load of CLT were investigated by Monte-Carlo simulation. The CLT reached the maximum shear load after some of laminae in transverse layer was failed.