Multi-Factor Analysis of Along-wind Loads of High-Rise Buildings Between Chinese Taiwan and Mainland Areas Based on Uniform Design

Abstract:

In order to determine the difference and similarity of along-wind loads of high-rise buildings between Chinese Taiwan and Chinese mainland areas， benchmarking analysis was used to compare the wind load code for buildings on both sides of the Taiwan strait， and multi-factor analysis of along-wind loads of high-rise buildings was conducted using the uniform design method. The results show that there are significant differences in the basic wind speed sample method and extreme distribution parameter estimation methods. The wind pressure height coefficient distribution and conversion coefficient of design wind speed in different return periods for the two standards are roughly the same； The turbulence intensity values of the Taiwan code is significantly larger than that of the mainland code； For the wind pressure calculation of main wind-force resisting system and cladding， Taiwan wind load code adopts classification method， while the Mainland wind load code adopts a unified expression. There are significant differences between the two standards in the combination of design wind loads of along-wind， cross-wind， and torsional directions. Taking the base shear and base bending moment as evaluation indexes， the influence of aspect ratio H/BL， exposure factor α， gust effect factor C_g， wind load shape coefficient C_p ， and turbulence intensity I_z on the along-wind loads of high-rise buildings gradually decreases， and the aspect ratio and exposure factor are the main influencing factors. The influence of gust effect factor on along-wind load increases with the increase of the aspect ratio of the structure， and when the aspect ratio increases to a certain value， it becomes the main factor that dominates the along-wind loads of the both sides.