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Numerical Simulation and Analysis of Wind Load on Tall Buildings

Author: QuWenChao
Tutor: YuJingHai
School: Tianjin University
Course: Structural Engineering
Keywords: High-rise building Wind load Numerical Simulation Interference effects
CLC: TU312.1
Type: Master's thesis
Year: 2010
Downloads: 234
Quote: 0
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Abstract


With economic development, technological advances and urban construction land conservation into account the needs of high-rise buildings has been a great development. Because of its high-rise building structure, soft features, the impact of wind loads more prominent. Practical engineering analysis of the role of wind loads, wind tunnel test method used more often. However, there is experimental wind tunnel test cycle is long, costly, scale effect and other issues. As computers increase in speed capacity and computing, numerical simulation show the superiority gradually, and become a research hotspot. But the wind load numerical methods and practical application of technology is still not very mature, in practical engineering applications much. Therefore, wind loads on high-rise buildings systematic numerical simulation study has important practical value. In conclusion, this paper on the basis of previous results to Reynolds-averaged Navier - Stokes equation, derived commonly used two-equation turbulence model of the basic physics equations. And briefly describes the numerical simulation of the basic solution process, discrete equations, numerical method and boundary conditions settings. Establish a numerical simulation of the fluid domain model and structure model calculations were carried out single building and interference effects static and dynamic wind load simulation. The simulation results and the literature comparing the results of wind tunnel tests to verify the digital-analog simulation accuracy and reliability. Combined with wind tunnel test results of the two commonly used turbulence models: SST k-ω model and the RNG k-ε model simulation results were compared and analyzed, the analysis showed simulations for this article RNG k-ε model simulated the effect is more good. On this basis, using RNG k-ε model for the single building wind load transient analysis, detailed analysis of the flow field and structural response changes over time, the analysis shows the maximum dynamic response of the structure is greater than static response. Finally, an example of two adjacent buildings interference effects wind load static and dynamic wind loads simulation. Case study found that interference effects flow field flow separation, vortex shedding and other more monomers simulate a great change, causing the building surface wind load size and pulsations produce greater change, further causing significant changes in the structural response. Interference effect of the structure under the maximum response is significantly greater than the monomer simulations. Simulation results and analysis of tall building structure wind research and design have a high reference value.

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CLC: > Industrial Technology > Building Science > Building structure > Structure theory to calculate > Structural loads and structural capacity > Structural load analysis
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