嘉峪关柔远楼风载体型系数研究

Research on Wind Load Shape Coefficient of Rouyuan Building in Jiayuguan

为了更加科学地保护我国木结构古建筑遗存,有必要借助现代技术手段研究其在风荷载作用下的受力情况,尤其是矗立在风速较大的西北地区的古建筑。本文选择典型高台楼阁三檐歇山式木结构古建筑--嘉峪关柔远楼为研究对象,借助三维激光扫描、计算流体力学等技术,建立数值风洞试验,针对窗棂的开闭情况展开分析,并求解其风载体型系数。得到窗棂封闭会减小迎风面墙体和顶层屋檐的受力,增大侧面、背风面墙体以及一二层屋檐受力等结果,为今后古建筑保护与研究提供一定帮助。

In order to protect the remains of ancient wooden buildings scientifically in China,it is necessary to study their stress under wind load with the help of modern technology,especially in Northwest China with high wind speed.In this paper,Jiayuguan Rouyuan building which has the typical three eaves Xieshan wooden structure was selected as the research object.Based on three-dimensional laser scanning and computational fluid dynamics,the numerical wind tunnel test was established.The two working conditions of window lattice opening and closing were analyzed,and their wind load shape coefficients were got.The results showed that the closing of window lattice would reduce the stress of windward wall and roof eaves,and increase the stress of side wall,leeward wall and roof eaves on the first and second floors.It would provide some help for the protection and research of ancient buildings in the future.