# 하중(荷重) 변화(變化)가 적층목질재(積層木質材)(Glulam)의 중립축(中立軸)의 위치변이(位置變移)에 미치는 영향(影響)

• Park, Heon (College of Natural Science, Konkuk University) ;
• An, Tae-Hwan (Chungju Technical Junior College)
• 박헌 (건국대학교 자연과학대학) ;
• 안치환 (충주공업전문대학)
In this study, thickness 40mm glulams were composed of thickness 5mm, 10mm Quercus laminas and Pinus koraiensis laminas to study on the effect of load variation on transition of neutral axis of laminated veneer lumber(LVL). The transition of neutral axis was examined by strain variation, which was checked by strain gauge. amplifier, recorder, and strain meter. The elasticity of glulam was estimated by E = $\Sigma(E_i\;I_ i)$/I and this estimated elasticity values were compared with the elasticity values of glulam in bending. The result obtained can be summarized as follows: 1. The location of neutral axis of glulam was effected by glulam composition methods 2. The neutral axis did not shift by load variation within proportional limit. 3. The estimated elasticity of glulam by E = $\Sigma(E_i\;I_ i)$/I showed much lower value than the elasticity of glulam in bending.