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A platform for research: civil engineering, architecture and urbanism
Computational Wind Load Evaluation and Aerodynamic Mitigation of Low-Rise Building with Complex Roof Geometry
Climate change is the leading cause of the increasing intensity and occurrence frequency of wind events, inducing significant environmental, and economic consequences on communities and cities. A significant wind-induced load is initiated during a windstorm, mainly impacting the roof, leading to extensive roof damages or even roof total failure. Typical roof shapes (i.e., gable/hip) are generally designed using provision codes and standards. The wind tunnel test is required when designing complex roofs of low-rise buildings, as it experiences complex loading patterns attributed to the various possible roofing shapes and turbulent characteristics within the atmospheric boundary layer. This roof can be efficiently improved using computational modeling, including high-fidelity large eddy simulation (LES) to provide quantitative assessment for wind load in the primary stage of the design process to narrow down the design alternatives. The current study targets an isolated complex roof shape and utilizes LES and consistent discrete random flow generator (CDRFG) technique to simulate a model size of 1:50 to assess numerically wind load prediction by validating it with wind tunnel results. The current study aims to numerically (i) evaluate wind load on an isolated low-rise building with complex roof geometry for various angles of attack and (ii) mitigate the roof aerodynamically using parapets added corners to reduce the wind impact on the roof. The validation shows that both the mean and RMS pressure coefficients agree with the wind tunnel. The latter is evident for the effectiveness of that numerical evaluations as a precautionary method for the preliminary stage of the design of buildings. It was found that roof surfaces with solid parapets added to the corners can effectively reduce wind uplift forces on average by 15%.
Computational Wind Load Evaluation and Aerodynamic Mitigation of Low-Rise Building with Complex Roof Geometry
Climate change is the leading cause of the increasing intensity and occurrence frequency of wind events, inducing significant environmental, and economic consequences on communities and cities. A significant wind-induced load is initiated during a windstorm, mainly impacting the roof, leading to extensive roof damages or even roof total failure. Typical roof shapes (i.e., gable/hip) are generally designed using provision codes and standards. The wind tunnel test is required when designing complex roofs of low-rise buildings, as it experiences complex loading patterns attributed to the various possible roofing shapes and turbulent characteristics within the atmospheric boundary layer. This roof can be efficiently improved using computational modeling, including high-fidelity large eddy simulation (LES) to provide quantitative assessment for wind load in the primary stage of the design process to narrow down the design alternatives. The current study targets an isolated complex roof shape and utilizes LES and consistent discrete random flow generator (CDRFG) technique to simulate a model size of 1:50 to assess numerically wind load prediction by validating it with wind tunnel results. The current study aims to numerically (i) evaluate wind load on an isolated low-rise building with complex roof geometry for various angles of attack and (ii) mitigate the roof aerodynamically using parapets added corners to reduce the wind impact on the roof. The validation shows that both the mean and RMS pressure coefficients agree with the wind tunnel. The latter is evident for the effectiveness of that numerical evaluations as a precautionary method for the preliminary stage of the design of buildings. It was found that roof surfaces with solid parapets added to the corners can effectively reduce wind uplift forces on average by 15%.
Computational Wind Load Evaluation and Aerodynamic Mitigation of Low-Rise Building with Complex Roof Geometry
Lecture Notes in Civil Engineering
Gupta, Rishi (editor) / Sun, Min (editor) / Brzev, Svetlana (editor) / Alam, M. Shahria (editor) / Ng, Kelvin Tsun Wai (editor) / Li, Jianbing (editor) / El Damatty, Ashraf (editor) / Lim, Clark (editor) / Al-Chalabi, Raghdah (author) / Ibrahim, Muhammad (author)
Canadian Society of Civil Engineering Annual Conference ; 2022 ; Whistler, BC, BC, Canada
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2022 ; Chapter: 16 ; 247-260
2024-02-06
14 pages
Article/Chapter (Book)
Electronic Resource
English
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