系统中的墙壁(垂直)和屋顶以及楼面横隔(水平)的一般都是简支，协调工作以抵抗横向和纵向荷载。
System of walls (vertical) and roof and floor diaphragms (horizontal) that are generally simply supported and work together to support both vertical and horizontal loads.
以杭州游泳馆膜结构屋顶为例，本文通过风洞模拟实验的方法研究了大坡度膜结构屋面的风荷载特性。
Taking the membrane structure roof of Hangzhou Swimming Stadium for example, wind load characters on large slope roof were studied by wind tunnel simulation.
研究表明，在均布荷载作用下，除了梁柱线刚度比，刚架高跨比及屋顶坡度对刚架的稳定性能影响很大。
It is indicated that apart from stiffness factor of beam to column, the ratio of depth to span and slop of roof greatly affect the stability performance of the portal frame under roof uniform loading.
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