Affiliation:
1. Department of Civil & Environmental Engineering, Pusan National University, Busan 46241, Republic of Korea
Abstract
High-rise buildings in cities adversely affect wind regimes by changing the air currents in their surrounding areas. In particular, extreme climate phenomena caused by climate change are stronger and more frequent, causing damage in cities. To better understand skyscraper wind behaviors around high-rise buildings, actual measurements are necessary to determine the environmental assessment of the wind effect. In this study, field measurements were performed with five anemometers at five points in the vicinity of a skyscraper called the LCT residential complex (411.6 m tall) surrounded by high-rise buildings in the coastal city of Busan, South Korea during Typhoon Hinnamnor. The gust was 3.7 times stronger, while the maximum 1-min mean wind speed was 3.1 times stronger than those measured at a nearby reference weather station operated by the Korean Meteorological Administration. The characteristics of downward and canyon winds were shown to depend on the spatiotemporal characteristics of the five points. The turbulence intensity declined as the wind speed increased and converged to a certain value. The gust factor also dropped as the wind speed increased and converged to 2.0, and was considered to be the parameter that best represents the intensity of instantaneous gust caused by the skyscraper wind effect. These results suggest that high-rise buildings should be designed with the consideration of gusts twice as strong as the average wind speed. In addition, field measurements should be accompanied in order to respond to the skyscraper wind effect.
Reference25 articles.
1. Research on Optimum Design Method for Fire Protection System of Super Tall Building;Hwang;Korean Inst. Fire Sci. Eng.,2004
2. Pedestrian Wind Environment around Buildings: Literature Review and Practical Examples;Blocken;J. Build. Phys.,2004
3. Pedestrian-level Wind Conditions around Buildings: Review of Wind-tunnel and CFD Techniques and Their Accuracy for Wind Comfort Assessment;Blocken;Build. Environ.,2016
4. A Review on the Study of Urban Wind at the Pedestrian Level around Buildings;Mittal;J. Build. Eng.,2018
5. National Environmental Policy Act (NEPA) (1969). Environmental Impact Assessment (EIA) in the United States.