著者

曽田 五月也 宮津 裕次 松永 裕樹

出版者

日本建築学会

雑誌

日本建築学会構造系論文集 (ISSN:13404202)

巻号頁・発行日

vol.75, no.649, pp.559-566, 2010-03-30 (Released:2010-06-09)

参考文献数

12

被引用文献数

2 1

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This study proposes a structural system which aims at improving the seismic performance of new and existing wooden houses making use of oil dampers. Problems to install any special damping devices into wooden structures are known, for one thing to be the wood being brittle in bending and the other the strength of the joint between the device and wood being relatively low. Therefore, to get rid of these problems, we developed an oil damper which works only when subject to compression and is provided with relief valves to limit the maximum resistance. First part of the study deals with a series of harmonic loading tests to see if the damper exhibits the same properties as designed beforehand. Then, the dampers are mounted as knee braces at the corners of wood panels which is subject to dynamic loading tests in two ways. First one is a test to apply sinusoidal inertial force to an isolated panel. Second one is a shaking table test on full scale single-story wood frames. From these tests, we confirmed that the damper can absorb as much as nearly 60% of seismic input energy. It is also confirmed that the installment of the damper makes it possible for wooden frames that collapses at the first strike of strong ground motion to withstand the same ground motion several times with no significant damage accumulation to main structures. Lastly, these test results are compared to analytical results and it is concluded that the proposed structural system do work to improve seismic safety of wooden houses.

著者

曽田 五月也 宮津 裕次 脇田 健裕 松永 裕樹 宋 成彬

出版者

早稲田大学

雑誌

基盤研究(B)

巻号頁・発行日

2010

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軽量低層建築物を対象として、地盤上のべた基礎上面に超高分子量ポリエチレンシートを敷き、その上に上部構造用基礎を設置する事で、大地震時には基礎の滑りにより免震に準じた効果を発揮する一方で、小地震時や強風時には、上部構造内に設置するオイルダンパによる制振効果を活用する構造システムを考案した。実験的・解析的な検討を通じて、過酷な地震動の作用に対しても上部構造の変形・加速度を地震直後から建築物の継続使用を可能とする範囲に収めることが可能なことを実証した。