木鋼ハイブリッドラチスシェル接合部の面外負方向および面内方向回転剛性

摘要

近年，建築分野において木材利用が促進され，単層ラチスシェル屋根構造に木質材を用いる事例も增加している。木質ラチスシェル構造においては接合部の回転剛性がその座屈荷重に及ぼす影響が大きいと考えられるが，その研究事例はまだ少ない。これらの接合部においては面外方向および面内方向の曲げに対する剛性および耐カがそれぞれ異なる場合が多く，各方向における接合部特性の把握およびそれぞれの座屈荷重への影響を確認する必要がある。%The authors have proposed effective steel connections achieving high bending stiffness and strength for timber grid-shell structures in the previous research. However, their performance against negative out-of-plane and in-plane directions which affect the shell buckling strength are not clear yet. In this research, the bending performance of the proposed connections against negative out-of-plane and in-plane directions are confirmed through real-size mock-up tests. They are compared to the performance against positive out-of-plane. Formulas for evaluating the stiffness and strength of the connections against these directions are proposed, and their validity are verified by comparing with the test results.