The objective of this assignment is to take wind tunnel pressure data and develop ASCE-‐7-‐equivalent external pressure coefficients, and then to compare the results with those in ASCE 7-‐10. The steps to achieve this, and the data to be used, are described below.
Two spreadsheets are relevant for this assignment: “RoofCornerCpTTU.xlsx” and
“WindSpeedProfile.xlsx”. The first contains pressure data from the roof of a wind tunnel model replicating the TTU-‐WERFL building at a scale of 1/50. This building has an eave height of 13 ft and a gable roof slope of 1/48, which can be considered as flat. Time histories of pressure coefficients for 16 taps located near the corner of the roof are included for each of 3 wind directions, viz., 0o, 45o and 90o. The time history data for each pressure tap are provided as a column of data in the sheets, so there are 16 columns in each sheet. The tap numbers and tap locations are provided on another sheet within the file and are given in full-‐scale dimensions. The pressure coefficients are referenced to the mean wind speed at the roof height. The second file provides the mean wind speed and turbulence intensities, with the elevation, z, given in full-‐scale dimensions.
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