Universal equivalent static wind load distributions reproducing maximum load effects for all structural members

通用等效静态风荷载分布再现所有结构构件的最大荷载效应

基本信息

批准号：
17360277
负责人：
TAMURA Yukio
金额：
$ 9.54万
依托单位：
Tokyo Polytechnic University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360277/
关键词：
maximum load effect quasi-static wind load wind tunnel proper orthogonal decomposition FEM analysis time-domain response analysis tall building low-rise building

项目摘要

The universal equivalent static wind load that reproduces the maximum wind load effects of all structural members was studied. Multi-channel simultaneous fluctuating pressure measurements were made for various types of structures such as long-span cantilevered roofs, dome roofs, high-rise buildings and so on in a boundary-layer wind tunnel. Time-domain response analyses were conducted based on the FEM models of structures, and the maximum wind load effects such as axial forces, shear forces or bending moments in all members were extracted. The universal equivalent static wind load distribution was derived using the eigenvectors of the POD analysis of the fluctuating pressure field and coefficients obtained by a singular value decomposition. The method was then applied to a long-span cantilevered roof structures and others, and some examples of the universal equivalent static wind load distributions were obtained and stored as a database. The method was extended to apply to the cases of … More the maximum wind load effects including a resonant component. One of the difficult problems to solve was the combination of the signs of the maximum and minimum load effects. In some cases, the obtained universal equivalent static wind load distributions could be irregular and unnatural, which seemed to be inappropriate for general application. It was found that the signs of the largest load effects could be determined from the POD eigen-modes of the internal forces and that the obtained universal equivalent static wind load distributions were smooth and natural. Largest load effects estimated by the time history response analyses were compared with those reproduced by the GLF method, the LRC method and the universal equivalent static wind load method. The largest load effects estimated by the GLF method and the LRC method vary widely from the actual largest load effects, but those reproduced by the universal equivalent static wind load method showed good agreement with the actual largest load effects in all cases. Less

研究了再现所有结构构件最大风荷载效应的通用等效静风荷载，对大跨度悬挑屋面、穹顶屋面、高层建筑等各类结构进行了多通道同步脉动压力测量。基于结构的有限元模型进行了边界层风洞中的时域响应分析，并提取了所有构件中的最大风荷载效应，例如轴力、剪力或弯矩。静止的利用脉动压力场POD分析的特征向量和奇异值分解得到的系数推导了风荷载分布，然后将该方法应用于大跨悬臂屋盖结构等，以及通用等效静力的一些例子。获得风荷载分布并将其存储为数据库。该方法扩展到适用于包括共振分量的最大风荷载效应的情况。要解决的难题之一是最大风荷载的符号组合。在某些情况下，通用等效静风荷载分布可能是不规则且不自然的，这似乎不适合一般应用。将时程响应分析估计的最大荷载效应与 GLF 方法、LRC 方法和通用等效静风荷载再现的结果进行比较。最大负载效应的方法。 GLF 法和 LRC 法估计的最大荷载效应与实际最大荷载效应相差很大，但通用等效静风荷载法再现的结果在所有情况下都与实际最大荷载效应吻合良好。