Experimental study of compressive properties parallel to grain of glulam

Abstract This paper describes results and analysis of experiment compression behavior parallel to grain glulam (Norway Spruce, Japanese cedar, cypress), especially in damage zones near loading plates joints. To investigate the influence factors physical properties mechanism zone or joints, tests on 90 specimens surface-measurement 48 were performed. As a result, it was observed that existed The lengths wood–wood joints are larger than wood–steel length independent load height specimens. However, its scatter increase as width cross-section increases, does roughness contact surface. It considered cause is surface depends Therefore, processing accuracy has an increasing trend contact-surface area increases. There size effect compressive strength because knots.