Gust Response of a Box Type Stiffening Girder under the Action of Random Wind Force

随机风力作用下箱型加劲梁的阵风响应

• 批准号: 62460151
• 负责人: KOBAYASHI Hiroshi
• 金额: $ 1.86万
• 依托单位: Ritsumeikan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62460151/
• 关键词: Active simulation; Wind turbulence; Aerodynamic admittance; Gust response; Suspension bridge; Field measurement; Fatigue failure; Wind tunnel test; 風洞実態; 強風; 橋梁振動

(1) ACTIVE SIMULATION OF TURBULENCESimulation of a natural wind is an important problem for a wind tunnel investigation of gust response of a bridge deck. In the two dimensional wind tunnel simulation of wind turbulence was carried out. The random servo-control of a cascade could produce an arbitrary given turbulence.(2) WIND TUNNEL MODEL TESTS FOR AERODYNAMIC ADMITTANCENumerical treatment of a gust response requires an aerodynamic admittance to be assessed through wind tunnel test. Time series of the random response of bridge models were obtained. Through the time series, random aerodynamic force was analyzed and aerodynamic admittance was obtained.(3) GUST RESPONSE OF SUSPENSION BRIDGEThe gust response of the suspension bridge as well as wind speed was measured at the site in a strong wind up to 23m/s.(4) SAFETY OF A SUSPENSION BRIDGE AGAINST GUST LOADThe amplitude and the number of the stress cycles caused by gust response during the service time were calculated considering the probability of wind speed and direction. Safety of a bridge member against gust load was checked concerning fatigue failure.

(1)湍流的主动模拟自然风的模拟是桥梁风振响应风洞研究的一个重要问题。在二维风洞中进行了风湍流的数值模拟。叶栅的随机伺服控制可以产生任意给定的湍流。(2)气动导纳的风洞模型试验阵风响应的数值处理需要通过风洞试验来评估气动导纳。得到了桥梁模型随机响应的时间序列。通过时间序列对随机气动力进行了分析，得到了气动导纳。(3)悬索桥的阵风响应悬索桥的阵风响应以及风速是在现场测量的，风速高达23米/秒。(4)悬索桥在阵风作用下的安全性考虑风速和风向的可能性，计算了悬索桥在使用过程中由阵风引起的应力循环幅值和循环次数。针对疲劳破坏问题，对某桥梁构件在阵风荷载作用下的安全性进行了校核。

项目成果

小林紘士,川谷充郎,中出収,野村浩史,太田圭,畑中章秀: "2次元風洞におけるスケ-ルの大きい乱流の発生" 第10回風工学シンポジウム論文集. 163-168 (1988)

Hiroshi Kobayashi、Mitsuro Kawatani、Tsuyoshi Nakaide、Hiroshi Nomura、Kei Ota、Akihide Hatanaka：“二维风洞中大规模湍流的产生”第十届风工程研讨会论文集 163-168（1988）。

H.Kobayashi,M.Kawatani,O.Nakade: "Vortex-Induced Oscillation of Two-Dimensional Rectangular Cylinders in Large Scale Turbulence" Jour.Wind Engineering. No.37. 19-24 (1988)

H.Kobayashi、M.Kawatani、O.Nakade：“大规模湍流中二维矩形圆柱体的涡激振荡”Jour.Wind Engineering。

H.Kobayashi,S.Komatsu,S.Takei: "Aerodynamic Response of a Mono-Cable Suspension Bridge" Jour.Wind Engneering. No.37. 529-535 (1988)

H.Kobayashi、S.Komatsu、S.Takei：“单缆悬索桥的空气动力学响应”Jour.Wind Engineering。

小林紘士;川谷充郎;中出収;太田圭;畑中章秀: 土木学会関西支部 年次学術講演会. (1988)

Hiroshi Kobayashi；Mitsuro Kawatani；Kei Ota；Akihide Hatanaka：日本土木工程师学会关西分会年度学术讲座。

H. Kobayashi, S. Komatsu and S. Takei: "Aerodynamic Response of a Mono-Cable Suspension Bridge" Jour. of Wind Engineering. No. 37. 529-535 (1988)

H. Kobayashi、S. Komatsu 和 S. Takei：“单缆悬索桥的空气动力学响应”Jour。