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Dive into the research topics where Hajime Okada is active.

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Featured researches published by Hajime Okada.


Journal of Wind Engineering and Industrial Aerodynamics | 2003

Wind response analysis of a transmission tower in a mountainous area

Toshinaga Okamura; Takeshi Ohkuma; Eijiro Hongo; Hajime Okada

Since 1991, the authors have been observing wind in a mountainous area and wind responses of a large power transmission tower constructed in this area. The purpose of these observation is to clarify the wind characteristics and wind responses of power transmission towers. This paper describes the wind characteristics and the wind responses of this transmission tower obtained from full-scale measurements. A wind tunnel test was also conducted on a two-dimensional mountain to investigate the flow around it. Finally, a wind response analysis was conducted on the transmission tower on the basis of these examinations. The wind response analysis results for the blow-down flow on the leeward slope of the mountain corresponded closely with the measurements. This shows that the evaluation of the blow-down angle is also important in the wind response analysis of the transmission tower in the mountainous area.


Journal of Structural and Construction Engineering (transactions of Aij) | 2008

STUDY ON ESTIMATION OF WIND PRESSURE UNDER ROOF TILES

Hajime Okada; Takeshi Ohkuma; Junji Katagiri


Journal of Wind and Engineering | 2014

Recommendation of Gust Factor for Assessment of Pedestrian Wind Environment Based on Probability of Exceedance of Daily Maximum Gust Wind Speed

Ryuichiro Yoshie; Yoshihide Tominaga; Shinji Ito; Hajime Okada; Hiroto Kataoka; Hitomitsu Kikitsu; Kiyoshi Sasaki; Hiroaki Nishimura; Hiroshi Noda; Koji Hayashida; Koichi Miyashita; T. Yamanaka; Masaru Yoshikawa


日本建築学会大会学術講演梗概集(中国) 2008年9月 | 2008

20116 屋根瓦の内圧予測に関する研究 -その2 内圧の推定方法に関する検討-

創 岡田; Hajime Okada; 武司 大熊; Takeshi Ohkuma; 比佐夫 丸川; Hisao Marukawa; 純治 片桐; Junji Katagiri


日本建築学会大会学術講演梗概集(中国) 2008年9月 | 2008

20115 屋根瓦の内圧予測に関する研究 -その1 部分モデルによる内圧測定実験-

純治 片桐; Junji Katagiri; 創 岡田; Hajime Okada; 武司 大熊; Takeshi Ohkuma; 比佐夫 丸川; Hisao Marukawa


Wind Engineers, JAWE | 2007

Effects of Transient Wind on Man

Katsuji Tanemoto; Koji Omino; Hiroaki Shiroto; Hiroharu Endo; Keisuke Ishii; Taisuke Shimamura; Takaaki Fukuhara; Hiroaki Nishimura; Ryuichiro Yoshie; Yoshihide Tominaga; Hajime Okada; Hiroto Kataoka; Kiyoshi Sasaki; Koichi Miyashita; Hitomitsu Kikitsu; Hironori Hayashi; Hiroshi Noda; Koji Hayashida; Masaru Yoshikawa; Shinji Ito; Hideyuki Tanaka; Taichi Shirasawa; Yoshihiro Ishida; Shinsuke Kato; Zhen Bu; Hong Huang; Tsuyoshi Kobayashi


Journal of Wind and Engineering | 2005

セッシュン9 (8編) 建築物の風圧・風力

Hajime Okada; Takeshi Ohkuma; Junji Katagiri; Shuntaro Naga; Yasushi Uematsu; Theodore Stothopoulos; Eri Iizumi; Toshihide Kanaya; Kengo Masuda; Hiromasa Kawai; Hidekazu Nishizawa; Eisuke Nishikawa; Yusuke Maruyama; Ran Wei; Yukio Tamura; Ryuichiro Yoshie; Daisuke Somekawa; Akihisa Kawaguchi


Journal of Structural and Construction Engineering (transactions of Aij) | 2005

浮上りが生じていない瓦に作用する風圧力の性状 : 実大建物による屋根瓦に作用する風力に関する研究 その1

Hajime Okada; Takeshi Ohkuma; Junji Katagiri


Wind Engineers, JAWE | 2001

Cable (Transmisson Line)& CFD (Environment)

Chandra B Gurungi; Hiroki Yamaguchi; Teruhiro Yukino; Naoshi Kikuchi; Yutaka Matuzaki; Hirotaka Ishida; Takayuki Kuze; Toshinaga Okamura; Takeshi Ohkuma; Eijiro Hongo; Hajime Okada; Takanori Uchida; Yuji Ohya; Yu Fat Lun; Akashi Mochida; Hiroshi Yoshino; Taichi Shirasawa; Atsushi Yamaguchi; Takeshi Ishihara; Yozo Fujino


Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-1, Structures I, Loads, reliability stress analyses foundation structures shell structures, space frames and membrane structures | 2000

Study on Wind Induced Response of Transmission Line System : Part3 Examination of Wind Resistance Design on Steel Tower for Large Transmission Line

Hajime Okada; Takeshi Ohkuma; Eijiro Hongo; Hisao Marukawa; Toshinaga Okamura

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Eijiro Hongo

Tokyo Electric Power Company

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Ryuichiro Yoshie

Tokyo Polytechnic University

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Hiroaki Nishimura

Tokyo Polytechnic University

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Hiroshi Noda

Jichi Medical University

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