ACROSS-WIND DYNAMIC RESPONSE OF HIGH-RISE BUILDING UNDER WIND ACTION WITH INTERFERENCE EFFECTS FROM ONE AND TWO TALL BUILDINGS

摘要

Systematic studies on the across-wind dynamic interference effects on two and three tall buildings are presented in this paper. It is found that surrounding and upstream interfering building(s) can significantly affect the across-wind load on the interfered principal building. Generally speaking, two interfering buildings can cause more adverse dynamic effects on the principal building than a single one does. The results show that the maximum interference factor (IF) among three buildings increases 80% over that between two buildings in terrain category B which has been defined in Chinese load code for design of building structures; a noticeable difference of 29% of IF is also observed in terrain category D. Vortex shedding from the upstream buildings can lead to vortex-induced resonance, resulting in excessive across-wind loads on the downstream building. Although interference effects in terrain category D are much smaller than those in exposure category B, the maximum IF is found to be 1 -83 in the case of three buildings with the same size in terrain category D and 2·7 in other configurations.