Estimation of aerodynamic instability of building structures

摘要

The interaction of flexible structures with the wind flow and the possibility of the occurrence of so-called aerodynamics instability is an actual problem. The sad experience of different years has shown that the phenomenon of aerodynamics instability is characteristic for various types of structures, such as bridge structures, asymmetric and high structures. This experience gave impetus to the study and development of methods for predicting and preventing all possible resonant and unstable oscillations. To verify methods for estimating of the aerodynamic instability, following test problem was chosen - the interaction of the cross section of the bridge on the Tacoma River (Tacoma Narrows Bridge) with the air flow. This task was solved by a team of scientists from China and presented at the international conference (The Seventh International Colloquium on Bluff Body Aerodynamics and Applications (BBAA7) Shanghai, China; September 2-6, 2012) [1].