大跨度平屋面结构风洞试验研究

Study on Wind Tunnel Tests for Large-span Flat Roof Structures

本文对大跨度平屋面结构在四周封闭、四周敞开、有女儿墙、无女儿墙、墙体突然开孔各种不同情况下的刚性模型和气动弹性模型进行了风洞试验研究 ,提出了考虑弗劳德数等一系列相似参数模拟的大跨度平屋面气动弹性模型的设计制作方法 ,获得了大跨度平屋面结构在各种不同情况下的屋面风压分布规律及加速度风振响应特性。

This paper presents the wind tunnel tests for rigid and aeroelastic models of large span flat roof structures in the following cases: with or without parapets, four sides closed or unclosed, and a suddenly opened hole. The method to simulate the aeroelastic properties of prototype in consideration of a series of analogy coefficients including Froude number has been established. The characteristics of the wind pressure distribution on large span flat roof structures under different conditions and the dynamic responses have been obtained through these wind tunnel tests of rigid models and aeroelastic models.