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Wind Effects on a Tall Building with Square Cross-Section and Mid-Side Base Columns: Database-Assisted Design Approach
| 题名： | Wind Effects on a Tall Building with Square Cross-Section and Mid-Side Base Columns: Database-Assisted Design Approach |
| 正文语种： | 英文 |
| 作者： | Sejun Park1; Dat Duthinh, M.ASCE2; Emil Simiu, F.ASCE3; and DongHun Yeo, M.ASCE4 |
| 作者单位： | 1NIST Director’s Postdoctoral Research Associate, Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899. 2Research Engineer, Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899. (corresponding author). 3NIST Fellow, Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899. 4Research Engineer, Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899. |
| 关键词： | Aerodynamics; Citicorp building; Corner winds; Database-assisted design (DAD); Demand-to-capacity index (DCI); Face winds; High-rise building; Mid-side columns; Overturning moments. |
| 摘要： | This paper illustrates the application of the database-assisted design (DAD) method to the wind design of high-rise buildings. The paper uses publicly available wind tunnel data and DAD procedures to compare responses to (1) corner winds and (2) face winds of a high-rise building of square cross-section supported by a central core column and four mid-side legs. The responses being considered consist of overturning moments, and of demand-to-capacity indexes (DCIs) of selected members, including multistory chevron braces. The analysis accounts for structural dynamics and second-order load-deformation effects. The results show that corner winds are less demanding than face winds, both globally (overturning moments) and locally (DCIs). The along-wind and across-wind overturning moments in the corner wind case are about 20% and 50% lower, respectively, than their counterparts in the face-wind case. The peak axial forces in the legs (peak refers to absolute value) and the peak DCIs in the mid-side mast columns (continuation of the legs) induced by corner winds are lower by 20%–30% than their counterparts due to face winds. The investigation confirms that the building code of the City of New York in effect in the early 1970s can be interpreted as meaning that the design for wind of structures with a square shape in plan may be performed by assuming the wind loads to act normal to a face of the building. The building analyzed in this paper is similar to the Citicorp Building (completed in 1977, later renamed Citigroup Center, now called 601 Lexington) and the results of the analyses presented herein suggest that a re-examination of the history of the Citicorp Building design and retrofit may be warranted. |
| 出版年： | 2019 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | 145 |
| 期： | 5 |
| 页码： | 1-6 |
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