実大木造軸組の強度性能 : せん断耐力に及ぼす柱と横架材間の仕口の影響及び火打材を用いた床の剛性

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Japanese traditional frame construction has been modified due to new construction methods, especially the spread of the use of various kinds of metal fasteners. In this study, the stiffness and strength of wooden walls and floors was investigated. There were two themes : Series I : Effect of joint properties between columns and horizontal wood members on rigidity of wall frames. Series II : Rigidity of floor frames with horizontal angle braces or plywood gusset In series I, there were four kinds of specimens ; I-A, I-B, I-C1 and I-C2 （Figs. 1, 2, and 3） In series II, there were three kinds of specimens ; II-A, II-B, and II-C（Fig.4）. Horizontal shear force was applied to evaluate the rigidity and strength of these frames(Fig.5) The following conclusions were derived : 1） Strength of wall frames with columns of balloon framing was graater than that of wall frames with columns of platform framing by 30%～50% at 1/60 radian deformajtion. When columns of platform framing are substituted for those of balloon framing, it should be noted that rigid metal fasteners between the column on the first floor and that on the second floor are required. (2）Horizontal angle braces with bolt and nuts contribute most effectively to increasing the rigidity of floor frames. The next most effective was the use of horizontal braces with nails. The effect of plywood gussets was the least. The ratio of contribution to rigidity was 3 : 2 : 1 when increasing the corner angle and 4 : 2.5 : 1 when decreasing the corner angle at 1/100 radian deformation.
三重大学農学部の論文

著者

杉山英男
東大

実大木造軸組の強度性能 : せん断耐力に及ぼす柱と横架材間の仕口の影響及び火打材を用いた床の剛性

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