Wind-induced response and wind resistant design of long-span curved roofs considering the unsteady aerodynamic forces

考虑非定常气动力的大跨弧形屋顶风致响应及抗风设计

基本信息

批准号：
15560482
负责人：
UEMATSU Yasushi
金额：
$ 2.24万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560482/
关键词：
long-span roof aerodynamic damping load estimation curved roof wind-induced response wind resistant design wind tunnel experiment unsteady aerodynamic force 構造特性

项目摘要

First, a survey was made regarding the geometric and structural characteristics spatial structures constructed in Japan in the last quarter century. The wind resistant design methods used for realizing these structures were also investigated.Then, the wind-induced response and its load estimation of several spatial structures were investigated. The subjects of this study are as follows :1.Model of wind pressure field on circular flat roofs and its application to the estimation of wind loads for the design of structural frames and cladding.2.Model of wind pressure field on spherical dome and its application to the estimation of wind loads for the design of structural frames and cladding.3.Proposal of a new load estimation system using aerodynamic database, neural network and time-history simulation technique for the design of cladding of spherical domes.4.Load estimation for a long-span greenhouse with a wing-like cross section.The technique developed in 3. will be expanded to cylindrical roofs. With this technique, the design wind lads can be evaluated quite easily without making any wind-tunnel experiment.Finally, the aerodynamic damping of spatial structures was investigated. A review of previous studies on the aerodynamic damping, or the vibration-induced wind forces on long-span roofs was made. Consequently, an experimental apparatus for measuring the vibration-induced forces. on a cylindrical roof in a wind tunnel has been developed.

首先，对日本近二十五年来建造的空间结构的几何和结构特征进行了调查。还研究了用于实现这些结构的抗风设计方法。然后，研究了几种空间结构的风致响应及其荷载估计。本研究的课题如下：1.圆形平屋顶风压场模型及其在结构框架和覆层设计风荷载估算中的应用。2.球形穹顶风压场模型及其应用应用于结构框架和覆层设计的风荷载估计。3.提出一种使用空气动力学数据库、神经网络和时程模拟技术的新型载荷估计系统，用于球形覆层的设计圆顶。4.具有翼状横截面的大跨度温室的荷载估计。3.中开发的技术将扩展到圆柱形屋顶。利用这种技术，可以很容易地评估设计风洞，而无需进行任何风洞实验。最后，研究了空间结构的气动阻尼。对先前关于大跨度屋顶上的气动阻尼或振动引起的风力的研究进行了回顾。因此，需要一种用于测量振动引起的力的实验装置。已经开发出在风洞的圆柱形屋顶上的装置。