Numerical Simulation Of High-rise Steel Fluid - Structure Interaction Wind-induced Response Study

Wind load is a kind of important loads to the high-rise steel buildings, and it is indispensable in the structure design. It becomes very important to measure the distribution of the wind pressure exactly on the surface of the buildings. At present, field measurement, wind tunnel test, theoretically analysis and numerical simulation are the four major methods to study the distribution of the wind pressure on the buildings. The wind tunnel test is the most common one of them. With the development of computational technology, numerical simulation plays a more and more important role in the wind engineering community. At the same time, there are many difficulties in the process of computing the high turbulent flow field around the building being immersed in the lower atmosphere boundary layer. So it is significant to study wind loads and wind-induced dynamic response for high-rise steel buildings in the field of engineering and research.In this study, the governing equations of fluid in the FSI system using ALE (Arbitrary Lagrangian-Eulerian) description and the governing equations of structures using the total Lagrangian description (TL) are proposed.Based on the theory of Fluid-Structure Interaction, the Commonwealth Advisory Aeronautical Research Council (CAARC) standard tall building model immersed in air boundary layer is numerically simulated using ADINA. Detailed procedures for numerical simulation are introduced. The finite element model of standard k-ε two equations is used to describe the wind turbulence and the semi-implicit method for pressure-linked equation (SIMPLE) is employed. The results revealed that the behaviors of the 3-D flow pressure, velocity in the flow domain. It was also observed that typical features of the structure such as displacements and velocity. Furthermore, the node displacement wind-induced vibration coefficients are investigated. Finally, the distributed wind pressure coefficient is studied.Mean wind pressure distribution of some classic high-rise buildings in Technical specification for steel structure of tall building are computed. The obtained numerical results are compared with those in the code. The numerical simulation results are significative for engineering.