叶形屋面风致积雪重分布及干扰特性研究OA

Leaf-shaped roofs,known for their novel and varied forms,have been widely used in long-span spatial structures in recent years.However,their complex geometry poses certain challenges to the non-uniform distribution of snow loads.Using the Euler-Euler method and a single-phase wind-snow coupling approach,the wind-induced snow drift on multi-leaf building roofs under different wind directions was simulated with a numerical wind tunnel.The findings indicate that the wind-driven snow distribution on leaf-shaped roofs should consider not only the roof inclination but also the effect of roof surface irregularity.Snow on leaf-shaped roofs is predominantly subject to erosion,which is more pronounced on protruding portions and leaf tips.Meanwhile,concave areas may experience severe local snow accumulation;therefore,excessive concavity should be avoided in design.The snow distribution on multi-leaf roofs is significantly influenced by mutual interference among the leaf units.Such interference impacts snow accumulation patterns:interference from lower roofs mainly concentrates on the windward edge of the sheltered roof,whereas interference from higher roofs primarily affects the overall snow distribution coefficient,typically inducing variations of about 20%.