Abstract
High‐rise buildings are very sensitive to wind excitations, and wind‐induced responses have always been the key factors for structural design. Facade openings have often been used as aerodynamic measures for wind‐resistant design of high‐rise buildings to meet the requirement of structural safety and comfort. Obvious wind speed amplifications can also be observed inside the openings. Therefore, implementing wind turbines in the openings is of great importance for the utilization of abundant wind energy resources in high‐rise buildings and the development of green buildings. Based on numerical simulation and wind tunnel testing, the wind loads and wind speed amplifications on high‐rise buildings with openings are investigated in detail. The three‐dimensional numerical simulation for wind effects on high‐rise building with openings was firstly carried out on FLUENT 15.0 platform by SST k − ε model. The mean wind pressure coefficients and the wind flow characteristics were obtained. The wind speed amplifications at the opening were analyzed, and the distribution law of wind speed in the openings is presented. Meanwhile, a series of wind tunnel tests were conducted to assess the mean and fluctuating wind pressure coefficients in high‐rise building models with various opening rates. The variation of wind pressure distribution at typical measuring layers with wind direction was analyzed. Finally, the wind speed amplifications in the openings were studied and verified by the numerical simulation results.
Highlights
With the development of science and technology, new materials with light weight and high strength have been emerged.is promotes to the high-rise buildings in the trend of light weight, high flexibility, and low damping
Wang et al analyzed the surface pressure contour and wind pressure coefficients of high-rise building with openings [24]. Both numerical simulation and wind tunnel testing are adopted in this study to evaluate the effects of opening on high-rise building. e mean wind pressure coefficients and the wind flow characteristics are discussed. e distribution law of wind speed in the openings is presented
It can be clearly seen that this variation has not been changed. e fluctuating wind pressure coefficients of all the measuring points are significantly reduced. e measuring points S1 and S5 at the edge are obviously reduced at the wind direction of 0°∼15°. e maximum reduction of S1 at the wind direction of 0° is up to 25%. e fluctuating wind pressure coefficients of the measurement points S2 and S3 are reduced at all wind directions. e maximum reduction and the occurrence angles were 27% for 30° and 16% for 0°, respectively
Summary
With the development of science and technology, new materials with light weight and high strength have been emerged. Openings have been adopted for wind loads reduction of high-rise buildings [12,13,14]. Li et al investigated wind load characteristics of high-rise buildings with opening. Zhang et al indicated that the primary factor for the reduction of overall wind load on building models was the decrease of surface area due to opening [19]. Wang et al analyzed the surface pressure contour and wind pressure coefficients of high-rise building with openings [24]. Both numerical simulation and wind tunnel testing are adopted in this study to evaluate the effects of opening on high-rise building. The wind speed amplifications at the opening are analyzed and comparatively studied. is study aims to provide useful information for wind-resistant design and wind energy utilization of high-rise building with openings
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