屋面风荷载及风致破坏机理

随着建筑科技和施工工艺的进步，大量形式新颖、质量轻、柔度大的大跨度屋面结构不断涌现，风荷载成为这类结构的重要荷载。本文通过综合大量风洞试验成果和灾后实地调查结果，研究了平屋面、坡屋面、弧状屋面、柱壳和球壳屋面等各种屋面形式的风压分布特征，给出了可供设计和研究参考的屋面风压系数，并对屋面风压分布及屋面结构的风致破坏机理作了较为详细的论述，得出对屋面抗风设计颇有指导意义的结论。

Wind Load on Roof Structures and Mechanism of Wind-induced Damages

With the development of architectural technique and its construction, a number of roof structures with new types, large spans and high flexibility have been emerged. wind loads become important to these structures. Through a review of the results of wind tunnel tests and post-disaster investigations, wind pressures distribution over roof structures with various types are studied in this paper. Wind pressure coefficients, which are helpful to design and research are given. Wind loads on roof structures and mechanism of wind-induced damage are described in detail. Finally, significant conclusions are obtained for roof structures design.