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IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints


IASS Symposium 2014

SESSION: General 4: Structural Stability

Numerical analysis of mean wind pressureon large span free-form surface structure

< Table of Contents for General 4: Structural Stability
  • Proceedings Name: IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints
  • ISSN: (Electronic Version) 2518-6582
  • Session: General 4: Structural Stability
  • Title: Numerical analysis of mean wind pressureon large span free-form surface structure
  • Author(s): Ganping SHU, Lei DONG, Dajie WEI, Jinyu LUA, Ran LI
  • Keywords: large span, free-form surface structure, turbulence model, wind tunnel test
Abstract
In order to achieve graceful architectural shape, free-form surface structure springs up. However, it is quite difficult to determine the wind pressure distribution on complex surface. Based on FLUENT software, three commonly used turbulence models in wind projects were adopted respectively to the numerical simulation of the mean wind pressure distribution for a large span freeform surface structure with about 470 meters in the length direction and about 180 meters in the short direction. Meshing accuracy and wind directions were considered in the simulation. With the comparison of numerical results and experimental results by wind tunnel test, the results showed that the SSTk w turbulence model could provide the best simulation precision. Furthermore, by altering the relative position between free-form surface structure and tall building with large opening in upwind area, the wind-induced interference effects were investigated. The results indicated that the absolute value of local wind pressure on the free-form surface roof increased since the mutual interference between the airflow passing through the large opening and the airflow in the backward zone without any opening. The effect becomes weaker with the increasing of the distance between upwind tall building with large opening and the free-form surface structure.

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