Determination of Pressure Coefficients for High Rise Buildings of Different Aspect Ratios
American Society of Civil Engineers/Structural Engineering Institute (ASCE-SEI)
May 2019-October 2019
Don Scott, P.E., S.E., F.SEI, F.ASCE
ASCE 7‐22 Wind Loads Sub‐Committee
CPP Wind Engineering & Air Quality Consultants; Degenkolb Engineers; Gilsanz Murray Steficek LLP; Hatfield Group; KPFF; LERA Consulting Structural Engineers; Magnusson Klemencic Associates Foundation; Nabih Youssef Associates Structural Engineers; National Council of Structural Engineers Associations; Odeh Engineers, Inc.; PCS Structural Solutions; Peter A. Irwin, Ph.D., P.Eng.; Silman; Glenn and Judy Bell; Skidmore, Owings & Merrill; Structural Focus; Walter P Moore and Associates, Inc.
The Structural Engineering Institute (SEI) of ASCE is pursuing the update and simplification of the 2016 edition of ASCE 7 Minimum Design Loads and Associated Criteria for Buildings and Other Structures approach to wind design. The pressure coefficients for the Main Wind‐Force Resisting System (MWFRS) in chapter 27 of ASCE 7‐16 for buildings above 60 ft date from the mid‐1970s. While tweaks have been made over the years, a systematic study using modern wind tunnel test methods for code-based design has not been conducted in over 40 years. In particular, our knowledge of both the role of turbulence on aerodynamic loading and the turbulence levels in the atmospheric boundary layer have evolved considerably over this time period. As a result of these factors, the ASCE 7‐22 Wind Loads Sub‐Committee wishes to review and possibly update the chapter 27 MWFRS wind load coefficients. This research is to obtain additional test data so as to provide information for other height aspect ratios, where the height ratio is defined as the height of the building to the least horizontal dimension.
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