暗扣屋面体系对檩条的扭转约束及影响  

TORSIONAL RESTRAINT OF CONCEALED-FASTENER ROOF SYSTEM TO PURLINS AND THE INFLUENCE

作　　者：徐锃 童根树[1] 张磊[1] 

机构地区：[1]浙江大学建筑工程学院,杭州310058

出　　处：《工业建筑》2016年第5期171-179,共9页Industrial Construction

基　　金：国家自然科学基金项目(5147842)资助

摘　　要：檩条在风吸力作用下会发生弯扭失稳,而当檩条上翼缘受到扭转约束时,对于风吸力作用下的整体稳定会有一定程度的提升。通过试验分析得到KLIP-LOK 406暗扣屋面板体系对冷弯Z形檩条的扭转约束刚度,然后利用得到的扭转约束刚度,采用能量法,为此种约束时风吸力作用下冷弯Z形檩条的临界弯矩提供理论解,并将理论解与ANSYS有限元模型的计算结果进行对比,两者吻合很好。The wind uplift loading ean eause the flexural torsional buckling of the purlins. And the global stability of the purlins under wind uplift Ioadiug will have a certain degree of improvement due to the torsional constraint of the top flange. It was mainly analyzed the torsional rigidity of the KLIP-LOK 406 roof＇ system to the Z purlins through experiments. With the results of the torsional rigidity, a kind of theoretical resuh was proposed through energy methods, which analysed the critical moment under wind uplift loading of the Z-section euld-formed purlin on this constraint condition. Which was compared with the results of the FEM, and they coinc.ided well.

关 键 词：暗扣 檩条 扭转约束 临界弯矩 

分 类 号：TU392.5[建筑科学—结构工程]