Studies Of Wind Load Characteristics For Hakka Earth Building Of Wind Tunnel

Hakka Earth Buildings lie in the southeast of Fujian province and have wide distribution. In recent years, with the development of production and construction and the change of global climate, the Earth Buildings often suffered from typhoons because of the long pick eave which can induce the synergistic effect of wind on the roof. So far there are not enough researches about wind load characteristics on the eaves yet. For the unique shape, it is difficult to get the shape coefficients of upper and lower surfaces using the existing standard, so the wind tunnel experiments appear imperative.Firstly,this paper did some practical research to access the feature of structure and geographical environment of the Hakka Earth Building. Do a little revision to make the prototype has more universal and representative , then adopts the method of wind tunnel experiments and numerical simulation to get the wind load characteristics of that prototype. Through comparing the numerical simulation and experimental results, we can find that numerical simulation is credible. Therefore numerical simulation result is credible, and it is feasible to take CFD simulation technology used in the study of Hakka Earth Building wind load characteristics. This paper collect wind load characteristics research materials of low buildings at home and abroad in recent years, analysis wind load characteristics and wind-induced failure mechanism of low building's roof, do a comprehensive summary and analysis to the many factors affect low air pressure distribution characteristics, complete the corresponding numerical simulation, and forms strong added to the results of wind tunnel experiments.This paper got the roofing wind load of monomer round Earth Building (square Earth Building) changes with the roof pitch and ratio of height to diameter (height-width ratio), and summarize the shape coefficient of corresponding roofing zone for reference in design.