客家土楼结构形式多样,因地处东南沿海地区,最近几年受强台风破坏严重。为研究其屋盖受台风破坏机理,本文基于著名的Reynolds时均N-S方程,湍流模型采用由k-ω湍流模型改进的SSTk-ω模型,建立有代表性的单体圆楼振福楼和方楼奎聚楼的数值风洞模型。根据对其屋盖挑檐风压分布和周围风流场的研究,表明其受风特性类似于敞开型的大跨悬挑结构,气流在屋盖前缘产生的漩涡作用是影响风荷载特性的主要因素,悬挑度过大,极易导致屋盖上下表面形成“上吸下顶”的叠加效应;同时木结构与夯土墙之间采用柔性连接,在台风作用下发生整体风致破坏。 Hakka Earth Building structure in various forms, because it is located in the southeast coastal areas, severe typhoon damage in recent years. Based on the well-known Reynolds time-averaged Navier-Stokes equations, the SSTk-ω model modified by the k-ω turbulence model is used to study the damage mechanism of roofs subjected to typhoon. A representative single circular building, Numerical Wind Tunnel Model for Building Kilju Building. According to the wind pressure distribution of the roof and the surrounding wind field, it is shown that the wind characteristics are similar to those of open-type long-span cantilevered structures. The swirling effect of airflow on the roof front is the main factor affecting the wind load characteristics Factors, overhang is too large, can easily lead to the formation of the upper and lower surface of the roof “on the suction under the top ” of the superposition effect; the same time the wooden structure and the ram wall with flexible connection between the typhoon occurred under the overall wind damage.