著者

宋 成彬 曽田 五月也

出版者

日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」

雑誌

理論応用力学講演会 講演論文集 第64回理論応用力学講演会

巻号頁・発行日

pp.OS1-01-02, 2017 (Released:2018-11-13)

---

In recent years, the Institution of the Long-Life quality housing for Wooden structure house is needed proper maintenance and evaluation of seismic performance. And the application of the vibration control structure for Wooden structure is also increasing. In order to evaluate seismic performance of wooden structure directly, it is useful that time-history earthquake response analysis is useful to evaluate the response about input energy of earthquake. In this report, we analyzed damping of wooden structure from the measured vibration data, and propose the damping model for Wooden structure. We compare response analytical result with experiment.

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

---

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

---

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。

著者

曽田 五月也 和田 純一 平田 裕一 山中 久幸

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.59, no.457, pp.29-36, 1994

被引用文献数

10 6

---

The damper investigated is an assemblage of a couple of units composed of two parallel steel plates and a layer of epoxy visco-elastic material (VEM) between them. When subjected to shear deformation, the VEM exhibits a hysteretic property or an energy absorbing capacity. The purpose of this paper is to present a method to construct a mechanical model to exactly simulate the dynamic behaviors of this damper, paving the way to putting it to practical use in the passive vibration-control design of buildings. A series of cyclic loading tests on the damper reveals that an equivalent stiffness and an equivalent damping coefficient, representing the hysteretic properties of the damper, are mainly dependent on the loading frequency and the current temperature. A linear three-element dashpot-spring model proposed has been confirmed capable of simulating these properties exactly .