Current ASCE Standard provisions on wind loads for low-rise building design are based on wind tunnel tests conducted at the University of Western Ontario in the 1970's. In spite of the advances they entailed at the time, those provisions are inadequate. UWO tests were conducted at low angular and spatial resolutions. Their results were then used to create drastically simplifying standard aerodynamic tables and plots designed for slide-rule era calculations and entailing errors that can be substantial. These errors can exceed 60 %.Significant improvements in main wind-load resisting system and component design can be achieved by using database-assisted design (DAD) and associated structural reliability tools, thus accounting realistically for the complexity of the wind loading as well as for the stochasticity and knowledge uncertainties affecting wind effects calculations. We illustrate DAD's capability to obtain, for the first time in a wind engineering context, realistic estimates of ultimate limit states due to local or global buckling failure. In the future other types of nonlinear behavior associated with ultimate limit states can be similarly dealt with. We note that DAD is ideally suited for use with data likely to be obtained in the future by Computational Fluid Dynamics methods.
Proceedings Title: Proceedings, Euro-SIBRAM '2002 International Colloquium on Simulation-Based Reliability Assessment Methods
Conference Dates: June 24-26, 2002
Conference Location: Prague, CR
Conference Title: International Colloquium on Simulation-Based Reliability Assessment Methods
Pub Type: Conferences
behavior, building technology, database-assisted design, dynamic response, low-rise buildings, nonlinear, purlins, structural reliability, ultimate limit states