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<p>Set-back modifications are a reliable approach for mitigating wind effects on high-rise buildings, but the aerodynamic mechanisms and responses of such structures have not been thoroughly studied. This research uses a square building as a reference model and evaluates three set-back building designs having a set-back ratio of 50 : 50 with various shapes, i.e. circular, octagon and hexagon, through computational fluid dynamics simulations. The study employs large eddy simulation to compare and analyse results including mean wind pressure, local wind force distribution, power spectral densities of base moments, flow fields and structural responses. Findings indicate that set-back tall buildings experience significantly improved aerodynamic performance. Generally, a single set-back feature proves to be more effective than a double set-back feature for enhancing aerodynamic performance. This research offers valuable guidance for the aerodynamic design of set-back tall buildings.</p>

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Effect of set-back ratio on wind pressure distribution of high-rise buildings with various shapes

  • 期刊论文

  • 发表日期：

    2025年10月25日

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  • Dharmendra Kumar,
  • Pradeep K Goyal,
  • Ritu Raj

摘要

Set-back modifications are a reliable approach for mitigating wind effects on high-rise buildings, but the aerodynamic mechanisms and responses of such structures have not been thoroughly studied. This research uses a square building as a reference model and evaluates three set-back building designs having a set-back ratio of 50 : 50 with various shapes, i.e. circular, octagon and hexagon, through computational fluid dynamics simulations. The study employs large eddy simulation to compare and analyse results including mean wind pressure, local wind force distribution, power spectral densities of base moments, flow fields and structural responses. Findings indicate that set-back tall buildings experience significantly improved aerodynamic performance. Generally, a single set-back feature proves to be more effective than a double set-back feature for enhancing aerodynamic performance. This research offers valuable guidance for the aerodynamic design of set-back tall buildings.