Wind-Induced Aerodynamic Responses of Triangular High-Rise Buildings with Varying Cross-Section Areas
Abstract
:1. Introduction
2. Numerical Methodologies
2.1. Fluid–Solid Load Transfer
2.2. Mesh Sensitivity Analysis and Estimation of Discretization Error
- Step 1
- For three-dimensional calculations, define the representative cell size h as
- Step 2
- Choose three significantly different sets of grids. For this analysis, use coarse, medium, and fine meshes. Ensure the grid refinement factor
- Step 3
- Calculate the extrapolated values:
- Step 4
- Calculate and report the error estimates:
2.3. Turbulence Modeling and Analysis
3. Validation
4. Aerodynamic Flow Analysis
5. Results and Discussion
5.1. Dynamic Analyses
5.2. Variation in Forces and Moments
5.3. Displacement and Stresses
6. Conclusions
- The use of unsteady Computational Fluid Dynamics (CFD) techniques combined with modal analysis constitutes a pragmatic approach for evaluating wind-induced vibrations in tall buildings during the initial design phase. Flow solutions were computed once and then subsequently iteratively employed in the structural dynamics analysis. This investigation completed the structural dynamic analysis, comprising 26,000 iterations, in approximately 72 h.
- The study demonstrated that the wind angle significantly influences the aerodynamic forces acting on the building models. At a 60° wind angle, the maximum drag coefficient was observed to be 3.2 × 103, while at 30°, the drag coefficient decreased to 2.1 × 103. This reduction in drag coefficient at higher wind angles indicates the effectiveness of building orientation in reducing wind-induced loads, which is crucial for optimizing the structural design of high-rise buildings.
- The impact of aerodynamic damping on wind-induced vibrations in slender buildings cannot be overstated, especially when motion is considerable. The findings of this study indicate that the aerodynamic damping experienced a significant peak in the across-wind direction, while increasing linearly in the along-wind direction. However, it had minimal effects on mean along-wind responses and determining aerodynamic damping presents a challenge, particularly for structurally complex buildings with irregular appearances.
- The conclusions drawn in this study suggest that a thorough analysis of slender buildings featuring non-regular cross-sections, like triangular shapes, is advisable. Such an analysis should encompass the dynamic effects of wind loads to accurately determine the structure’s behavior. This recommendation aims to enhance the assurance of achieving a well-balanced compromise between safety and economic considerations in the design and construction of such buildings.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Ref. | Short Description |
---|---|
[12] | This experimental study was carried out to determine the “optimal” aerodynamic force coefficients by applying the probabilistic method on tall buildings. |
[13] | The purpose of this study was to investigate the effect of interference between two C-shaped high-rise buildings using computational fluid dynamics. |
[1] | This study was carried out to determine the dynamic behavior of H-shape tall buildings subjected to wind loading using stochastic and CFD methodologies. |
[14] | In this study, rigid modeling and aeroelastic model tests of a proposed steel super-high-rise building with a height of 838 m and a facade that changes along the height were carried out in two typical wind fields. |
[15] | This paper proposed a computational approach for aerodynamic shape optimization of a high-rise rectangular building with wings. |
[16] | This study aimed to assess the aerodynamic behavior of supertall buildings with three-fold rotational symmetric plan shapes. |
[17] | This study computed the wind-induced response of corner modified ‘U’-shaped tall buildings. |
[18] | This study examined the wind-induced vibration and dynamic response of a pentagonal high-rise building model. |
[19] | This paper evaluated CFD turbulence models that simulated the external airflow around different building roofs using wind tunnel experiments. |
[20] | This study was carried out to determine the wind-induced vibrations of high-rise buildings using unsteady CFD and modal analyses. |
[21] | This study determined the aerodynamic forces and wind pressures acting on square-plan tall building models with various configurations: corner cut, setbacks, helical, and so on. |
Symbol | = Dimensionless Reattachment Length |
---|---|
N1, N2, N3 | 158,010, 286,730, 564,778 |
1.98 | |
1.87 | |
−1.43 | |
−1.41 | |
−1.40 | |
0.90 | |
−1.47 | |
1.45% | |
1.38% | |
1.73% |
Face | CFD RMS Cp | IS 875(Part-3)-2015 Cp |
---|---|---|
A | 0.99 | 0.80 |
B | −0.40 | −0.50 |
C | −0.88 | −0.70 |
D | −0.40 | −0.50 |
Structural Type | Fundamental Natural Period | Structural Damping Ratio | Ref. |
---|---|---|---|
RC Buildings | T = 0.05 H + 0.015 H | 2.00% | [51] |
RC Buildings | 0.0672 H0.75 | 2% | [52] |
RC Buildings | T = 0.022 H = H/46 | 1.57% | [53] |
RC moment frame | Ta = 0.0488 h0.75 | 2.00% | [54] |
RC Buildings | T = 0.0196 H = H/51 | 0.2467/H + 0.0067 | [55] |
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Yadav, H.; Roy, A.K. Wind-Induced Aerodynamic Responses of Triangular High-Rise Buildings with Varying Cross-Section Areas. Buildings 2024, 14, 2722. https://doi.org/10.3390/buildings14092722
Yadav H, Roy AK. Wind-Induced Aerodynamic Responses of Triangular High-Rise Buildings with Varying Cross-Section Areas. Buildings. 2024; 14(9):2722. https://doi.org/10.3390/buildings14092722
Chicago/Turabian StyleYadav, Himanshu, and Amrit Kumar Roy. 2024. "Wind-Induced Aerodynamic Responses of Triangular High-Rise Buildings with Varying Cross-Section Areas" Buildings 14, no. 9: 2722. https://doi.org/10.3390/buildings14092722