【正文】
hod for acrosswind loads for structural design of tall buildings. Nevertheless, the formula for PSD of the acrosswind force in the code can only be applied to tall buildings with aspect ratios of less than six, which seems difficult to meet the actual needs. In addition, the method takes acrosswind inertia load of fundamental mode as acrosswind equivalent static wind load including background and resonant ponents, making it seem questionable. Moreover, aerodynamic damping has not been considered in the method . In the present load code for the design of building structures (GB500092020) of world, only a simple method for calculating vortexinduced resonance of chimneylike tall structures with a circular section is provided, which is not applicable to the windresistant design for tall buildings and structures in general. In the design specification titled “ Specification for Steel Structure Design of Tall Buildings” , our related research results have been adopted. Concluding remarks With the continuing increase in the height of buildings, acrosswind loads and effects have bee increasingly important factors for the structural design of supertall buildings and structures. The current paper reviews researches on acrosswind loads and effects of supertall buildings and structures, including the mechanism of acrosswind loads and effects, acrosswind aerodynamic forces, acrosswind aerodynamic damping, and applications in the code. Consequently, some of our research achievements involving acrosswind forces on typical buildings, acrosswind aerodynamic damping of typical buildings, and applications to the Chinese Codes are presented. Finally, a case study of a real typical tower, where strong acrosswind loads and effects may be observed, is introduced. The recent trend in constructing higher buildings and structures implies that wind engineering researchers will be faced with more new challenges, even problems they are currently unaware of. Therefore, more efforts are necessary to resolve engineering design problems, as well as to further the development of wind engineering. 超高層建筑結(jié)構(gòu)橫向風(fēng)荷載效應(yīng) 摘要 隨著建筑高度的不斷增加,橫向風(fēng)荷載效應(yīng)已經(jīng)成為影響超高層建筑結(jié)構(gòu)設(shè)計越來越重要的因素。 obtaining acrosswind aerodynamic force through spatial integration of wind pressure on rigid models。 本科畢 業(yè)設(shè)計 外文翻譯 超高層建筑結(jié)構(gòu)橫向風(fēng)荷載效應(yīng) 院(系、部) 名 稱 : 城市建設(shè)學(xué)院 專 業(yè) 名 稱 : 土木工程 學(xué) 生 姓 名 : *** 學(xué) 生 學(xué) 號: ********** 指 導(dǎo) 教 師: 2020 年 12 月 25 日 Acrosswind loads and effects of supertall buildings and Structures Abstract Acrosswind loads and effects have bee increasingly important factors in the structural design of supertall buildings and structures with increasing height. Acrosswind loads and effects of tall buildings and structures are believed to be excited by inflow turbulence, wake, and inflowstructure interaction, which are very plicated. Although researchers have been focusing on the problem for over 30 years, the database of acrosswind loads and effects and the putation methods of equivalent static wind loads have not yet been developed, most countries having no related rules in the load codes. Research results on the acrosswind effects of tall buildings and structures mainly involve the determination of acrosswind aerodynamic forces and acrosswind aerodynamic damping, development of their databases, theoretical methods of equivalent static wind loads, and so on. In this paper we first review the current research on acrosswind loads and effects of supertall buildings and structures both at home and abroad. Then we present the results of our study. Finally, we illustrate a case study in which our research results are applied to a typical supertall structure. Introduction With the development of science and technology, structures are being larger, longer, taller, and more sensitive to strong wind. Thus, wind engineering researchers are facing with more new challenges, even problems they are currently unaware of. For example, the construction of super tall buildings is now prevalent around the world. The Chicago Sears Tower with a height of 443 m has kept the record of the world’s tallest building for 26 years now. Dozens of supertall buildings with heights of over 400 m are set to be constructed. Burj Dubai Tower with a height of 828 m has just been pleted. In developed countries, there are even proposals to build “cities in the air” with thousands of meters of magnitude. With the