Study Of Wind Pressure Interference Effects On The Roof Of Fujian Earth Buildings

The World Cultural Heritage Fujian Earth Building is the unique large rammed earth folk houses in mountainous area, which has absorbed the attentions from the whole world by its magical inhabited environment, special space organization, excellent guarding system, skillful building technology as well as profound earth building culture. Fujian located in the southeast coastal regions of China, and typhoon frequently visits, and the roof of Earth Buildings is timber structure, to protect the rammed earth wall away from rain, the eaves cantilever is significant large which cause higher peak pressure, not benefit for wind-resistant, and always result wind-induced damage. Earth Building is most constructed in form of groups, for wind load of Earth Building which arrangement in groups, the interference effects should be considered. Fujian Earth Building is typical low-rise irregular building, the interference of low-rise irregular buildings have not been studied at home and abroad so far. So it is of great significance to investigate the wind-load interference characteristics of Earth Buildings. On the basis of the existing research achievements, the windinterference characteristic of typical circular Earth Buildings was studied systematically by using numerical simulation techniques in this dissertation. Firstly, the numerical simulation was performed to determine the wind pressure distributions and flow field of two circular Earth Buildings of the same geometrical shape but with different distance in different wind directions. Compared with the single Earth Building, the change law of wind pressure coefficients interference factors of each zone and the wind characteristics of the characteristic profile were obtained. Secondly, on the basis of the research of two Earth Buildings, one moreEarth Building was added in, the changes of wind flow field and wind pressure coefficients interference factors of each zone were discussed, influence degree of the Earth Buildings quantity was analyzed. Finally, the interference of TianLuoKeng Earth Buildings was studied by using numerical simulation technology. With the meteorological data, TianLuoKeng Earth Buildings was simulated in the most common wind direction-northeast wind, so the changes of wind flow field and wind pressure coefficient interference factors of each zone were obtained. The capability of wind resistance was evaluated, and same solutions were proposed combining the actual situation of architectural features of Earth Buildings.Numerical simulation techniques were adopted to analyze and discuss the interference of typical low-rise irregular buildings, the changes of the wind pressure coefficient interference factors of each zone with different distance in different wind directions were obtained. The results can provide the reference for wind-resisting protection of Earth Buildings.