大跨度门式刚架屋面梁平面外稳定的研究

RESEARCH ON ROOF BEAM STABILITY OF LARGE SPAN GABLED FRAMES

近年来,门式刚架在工业厂房的设计中得到广泛的应用。对于一般的轻型门式刚架,通过设置隅撑来保证屋面梁受压下翼缘的平面外稳定,经多年的工程实践已经被证明是一种行之有效的构造措施。但对于大跨度、屋面荷载比较大的建筑物,经实例分析,如果仍采用这一措施则很难达到预期的效果。为保证结构的安全性和可靠性,探讨了一种行之有效的解决方案———摇摆支撑的设置。

Nowdays,gabled frames are widely applied in designs for industrial mill buildings.For normal gabled frames,construction scheme of flage bracing to ensure stability is proved to be effective.But for buildings of large span and great roof loads, anticipated effect is not be achieved by the same scheme.To ensure security and reliability of construction,sway bracing is introduced.