Mechanism and reduction for wind induced damage of buildings
建筑物风害机理及减灾措施
基本信息
- 批准号:14350302
- 负责人:
- 金额:$ 9.54万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2002
- 资助国家:日本
- 起止时间:2002 至 2004
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The aim of the research project is to find a rational wind resistant design measure for a reduction of damage of buildings and their claddings induced by strong winds. The several investigations were carried out for the project.The first research is to investigate characteristics of wind induced pressure fluctuation on a tall buildings in natural winds. It is often pointed that most of severe damages of claddings in typhoon winds were caused by a strong gust, of which characteristics is very non-stationary and can not be simulated in a wind tunnel. A large scale tall building model was set in the field in Shionomisaki Wind Effect Laboratory of Kyoto University and pressure fluctuations on walls were measured both in seasonal strong winds and typhoon winds. The analysis shows that the pressure coefficient should be evaluated in a proper time scale related with formation of a pattern of flow around the building instead of the ordinary 10 minute averaging period used in the analysis of a … More meteorological record. This short time pressure can be used for the evaluation of the peak wind loads combined with the non stationary wind data like in a typhoon wind, which can be obtained in wind tunnel experiment in the same time scale.The second research is related with the scattering of the roof tiles in strong wind. More than 80% of wind induced damages occurs at roofs. Particularly, the roof tiles can be easily scatted by strong winds. Pressures on a surface of a roof tile and in a batten space back of the tile were measured in natural winds, using an experimental house set in the field of the laboratory. The maximum peak lift force on the tile induced when wind attacks normal to the root, because of the large unbalance of pressures on the outside and the inside of the tile. On the other hands, the lift forces of the tile on the side and leeward roofs were not so large even when the large local peak suction acted on the surface of the tiles, because the large peak suction balanced to the back pressure of the tile. This findings agrees well with reports of damage observation by strong wind in which many tiles on the windward roof were scatted in strong winds.The third investigation is observations of damages by strong wind in typhoons. A large roof was blown off from a building and hanged on the overhead wire of New Tokaidou Line and Sinkansen stopped for 7 hours. The roof was a repaired roof covered on the old roof. It can be noticed that the type of the risk and the loss is fairly high. The cause of the blown off was investment in details. The other type of damage is the scattering of the long steel panel on the roof. This type of the damage is related with the internal pressure back the panel and the fatigue of the fixed volt. The historical structure were again suffered severe damages by typhoon wind, particularly the down flow from the valley. This type of the strong down flow were often observed in typhoons, and causes severe damage. One of the cause is a topological effect, which is convinced by the numerical simulation. Less
本研究的目的是寻求一种合理的抗风设计措施,以减少大风对建筑物及其覆层的破坏。本课题开展了以下几个方面的研究工作:第一,研究了自然风作用下高层建筑的风致压力脉动特性。人们经常指出,在台风作用下,覆层结构的严重破坏大多是由强风引起的,其特征具有很强的非平稳性,无法在风洞中模拟。在京都大学Shionomisaki风效应实验室建立了大比例尺高层建筑模型,测量了季节性强风和台风风作用下墙体上的压力波动。分析表明,压力系数应该在与建筑物周围流动模式的形成有关的适当时间尺度内进行评估,而不是在…分析中使用的普通10分钟平均周期更多气象记录。此短时间压力可用于评估峰值风荷载,结合类似于台风风的非平稳风数据,可在同一时间尺度的风洞试验中获得。第二个研究涉及大风中屋面瓦片的散布。80%以上的风灾发生在屋面。特别是,屋顶瓦片很容易被强风吹散。在自然风中,利用实验室田野中的实验房,测量了屋顶瓦片表面和瓦片背面板条空间内的压力。当风垂直于地砖根部时,由于地砖内外压力的巨大不平衡,在地砖上产生的最大峰值升力。另一方面,由于大的峰值吸力平衡了瓦片的背压,即使当局部峰值吸力较大时,瓦片在侧面和背风面上的升力也不是很大。这一发现与大风破坏观测的报告非常一致,在大风中迎风屋顶上的许多瓦片被大风吹散。第三项调查是台风大风破坏的观测。一栋建筑的大屋顶被刮掉,悬挂在新东海道线的架空电线上,新干线停了7个小时。屋顶是在旧屋顶上覆盖的修补过的屋顶。可以注意到,风险的类型和损失都是相当高的。失败的原因是细节上的投资。另一种类型的损坏是屋顶上的长钢板散落。这种类型的损坏与面板背面的内部压力和固定电压的疲劳有关。历史建筑再次受到台风风的严重破坏,特别是从山谷下来的水流。这类强下沉气流经常出现在台风中,造成严重的破坏。其中一个原因是拓扑效应,数值模拟证实了这一点。较少
项目成果
期刊论文数量(101)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Wind Force on Roof Tiles in Natural Wind
自然风中屋顶瓦上的风力
- DOI:
- 发表时间:2003
- 期刊:
- 影响因子:0
- 作者:田村昌仁ほか;5名;H.Kawai
- 通讯作者:H.Kawai
2003年台風14号(マエミー)による宮古列島での強風被害
2003 年第 14 号台风(美美)对宫古群岛造成强风破坏
- DOI:
- 发表时间:2003
- 期刊:
- 影响因子:0
- 作者:K.YAMADA;G.PEZZOTTI;奥田 泰雄
- 通讯作者:奥田 泰雄
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KAWAI Hiromasa其他文献
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{{ truncateString('KAWAI Hiromasa', 18)}}的其他基金
Impact ressitant performance of glasses against wind born debris
玻璃对风生碎片的抗冲击性能
- 批准号:
23360246 - 财政年份:2011
- 资助金额:
$ 9.54万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Study on the failure of cladding by flying debris under strong wind
强风作用下飞散碎片对包层破坏的研究
- 批准号:
20360255 - 财政年份:2008
- 资助金额:
$ 9.54万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Research on Mechanism of Collapse by Aero-elastic Instability of a Tall Building
高层建筑气弹性失稳倒塌机理研究
- 批准号:
12650586 - 财政年份:2000
- 资助金额:
$ 9.54万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Reponse of a building induced by an abrupt gust
突然阵风引起的建筑物的响应
- 批准号:
08650682 - 财政年份:1996
- 资助金额:
$ 9.54万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Charcteristics of wind load due to abrupt gust
突发阵风风荷载特征
- 批准号:
06650644 - 财政年份:1994
- 资助金额:
$ 9.54万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
Wind Induced Self-Excited Vibration of Tall Buildings and Its suppression
高层建筑风振自激振动及其抑制
- 批准号:
04805056 - 财政年份:1992
- 资助金额:
$ 9.54万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
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