3 0 0 0 加速度センサー搭載タブレットを用いためおと橋の振動特性評価
- 著者
- 及川 大輔 岩崎 圭音 後藤 文彦 青木 由香利
- 出版者
- 公益社団法人 土木学会
- 雑誌
- 土木学会論文集 (ISSN:24366021)
- 巻号頁・発行日
- vol.79, no.7, pp.22-00348, 2023 (Released:2023-07-20)
- 参考文献数
- 22
橋梁の振動特性を把握することは,橋梁全体の剛性の評価などの観点から重要である.しかし,橋梁の振動測定で用いられるサーボ型速度計などの測定機器は高価なものが多く,点検目的や研究目的で誰もが容易に入手して使用できるものではない.そこで,本研究では加速度計が搭載されている安価なタブレット端末を用いて,木歩道橋に対して十分な精度の振動測定が行えるかどうかを検討した.最も卓越する鉛直逆対称モードに関しては,雑音の影響も少くタブレット端末による測定値と数値解析との誤差は−4.0%程度となり,加速度計を搭載したタブレット端末による振動測定の有用性が確認された.また,固有振動数や減衰定数の値を,鋼・コンクリート橋に対する概算式から得られる値と比較することで,測定した木歩道橋の振動特性について考察した.
2 0 0 0 OA CLT 床版を用いた小規模橋梁の補修設計と施工
- 著者
- 豊田 淳 佐々木 貴信 荒木 昇吾 林 知行 有山 裕亮 後藤 文彦
- 出版者
- 公益社団法人 土木学会
- 雑誌
- 構造工学論文集 A (ISSN:1881820X)
- 巻号頁・発行日
- vol.65A, pp.799-806, 2019-03-15 (Released:2020-01-27)
- 参考文献数
- 14
Cross laminated timber (CLT) is a new type of engineered wood panel consist of several layers of structural lumber boards stacked crosswise at 90° angles and glued together on their faces. It is possible to produce CLT panels of 3 m wide, 12 m long, and 270 mm thick. CLT is light-weight material which the unit weight of CLT made of Japanese cedar is about 1/6 of reinforced concrete, therefore it's has advantage in terms of the transport and construction works. The authors consider using CLT elements for bridge deck replacement instead of a concrete deck slab. The overview of the design and construction of the bridge deck replacement of an existing bridge using CLT srlabs is reported herein.
1 0 0 0 OA 地域在住高齢者におけるリズムシンクロエクササイズの心理効果 特に楽しさに着目して
- 著者
- 松村 亜矢子 後藤 文彦 尾方 寿好
- 出版者
- 日本健康支援学会
- 雑誌
- 健康支援 (ISSN:13450174)
- 巻号頁・発行日
- vol.24, no.1, pp.1-11, 2022-02-01 (Released:2022-12-13)
- 参考文献数
- 38
BACKGROUND:Multimodal exercise programs are often used to improve the cognitive, physical, and psychological functions of the elderly, and it is believed that the effects of these programs are sustained by continued use. Although it is said that an element of fun is necessary for a person to continue exercising, there are very few reports that have examined the effects of such programs. OBJECTIVE:The purpose of this study was to clarify the effect of Rhythm Synchro Exercise, a multimodal aquatic exercise program, on psychology and especially on enjoyment. METHODS:A comparative study was conducted between 20 elderly subjects who participated in a Rhythm Synchro Exercise class for once a week, 60 minutes, 12 times in total and 17 elderly subjects who participated in a land-based exercise class for once a week, 90 minutes, 12 times in total. Subject demographics and exercise status were obtained by the interview, and questionnaires were administered before and after classes to assess exercise self-efficacy and subjective health perception. In addition, the degree of enjoyment of each program was evaluated in the middle of the classes (20 subjects for rhythm exercise, 15 subjects for land-based exercise) and at the end of the classes (20 subjects for rhythm exercise, 17 subjects for land-based exercise). RESULTS:In both groups, there was a main effect of time on subjective health feeling. The Rhythm Synchro Exercise group showed a tendency to maintain and improve their exercise self-efficacy in bad weather. It was also found that its members were able to be more enthusiastic about the program compared with the land-based exercise group, and it was recognized that the program could provide enjoyment. CONCLUSION:It was suggested that the provision of Rhythm Synchro Exercise could provide enjoyment, which is one of the factors necessary for improving psychological function and especially for continuing exercise, and can be expected to be effective as a new aquatic exercise.