平屋面结构风致响应的多参数对比试验

对大跨度平屋面气弹模型的风致响应特性进行了多参数对比的风洞试验研究。采用预张力索网结构体系设计制作了可调刚度的大跨度平屋盖结构的气弹模型,在大气边界层风洞中对来流风速、屋盖刚度和墙面开孔等参数的影响进行屋盖风致响应对比试验。试验研究结果表明,屋盖风致加速度响应随着来流风速或墙面开孔面积的增大而增大,随着屋盖刚度或墙面孔隙率的增大而减小,屋盖与内压的耦合效应对屋盖响应的影响较大。

Multiparameter Comparison Tests for Wind-induced Response of Flat Roof Structures

Multiparameter comparison wind tunnel tests were conducted to study wind-induced response characteristics for long-span flat roof structure aeroelastic models.Pre-stressed stretching architecture was applied to design the aerodynamic model for long-span flat roof structure with adjustable stiffness.The wind-tunnel tests were conducted to study the influence of wind speed,roof stiffness and wall opening to wind-induced dynamic response of the roof.It was shown that wind-induced acceleration response increased when the wind speed or the opening area increased,while it decreased when the roof stiffness or the wall porosity increased.The coupling effect of the roof and the internal pressure had great impact on the wind-induced response of the roof.