43 狭小間口に建つ木造住宅用の半剛接ラーメン軸組みに関する開発研究 : (その1)繰り返し水平加力実験の結果

概要

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Three types of earthquake resistant shear frames with semirigid joints are designed for timber structures standing at narrow sites. These frames are: panelled beam and column (type A); reinforced by diagonal members at joints of beam and column (type B); and reinforced by horizontal beam at bottom of frame (type C). Cyclic horizontal loading tests of these frames were carried out. The main results are as follows; The ultimate strength of type A is 4.0tf, type B is 6.8tf and type C is 8.6tf. The shear resistance factor of type A is 2.80, type B is 5.88 and type C is 7.31. When the relative shear angle of the frame is 1/120, the stiffness of type A is 212tf/rad., type B is 445tf/rad. and type C is 553tf/rad. and rapidly decreases with the increase of relative shear angle of the frame. The damping constants of all frames are about 15% and decrease gently with the increase of relative shear angle of the frame. Judging from the results of the loading tests, it becomes clear that it is sufficiently possible to use these frames practically.
一般社団法人日本建築学会の論文
1997-03-20