Effects of Geometrical Parameters on Extreme Uplift Force Coefficients on Gableroofs of New Rural Lowrise Buildings

Abstract:

By investigating into the areas in Zhejiang Province of China where wind disaster happens frequently, the geometrical parameters of the new rural lowrise buildings are obtained comprehensively. Based on the information, the windtunnel pressure tests for rigid models of such buildings are done. The law of the extreme uplift force coefficients on the roofs is studied. The effects of geometrical parameters on the most unfavorable uplift force coefficients on the gable roofs are given and then fitted as a function of roof pitches, aspect ratios and side ratios with the multiparametrical leastsquares method. The error analysis is made to assess the rationality of the result. These conclusions and the fitted function are useful references for wind loads standards and structure design of new rural lowrise buildings.

Key words:lowrise building; wind tunnel test; uplift force coefficients; extreme; error analysis