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改变屋面板厚度、檩条厚度、檩条腹板高度、立缝支架形式,对28组压型钢板屋面檩条体系进行足尺试验,研究体系总扭转刚度和影响总扭转刚度的因素。采用ANSYS有限元分析软件建模,分析屋面板、立缝支架和檩条三者的扭转刚度,分析结果与试验结果吻合较好。提出屋面板、立缝支架和檩条的扭转刚度的计算式。将试验结果和有限元分析结果进行对比,得到体系总扭转刚度由屋面板、支架和檩条三者的扭转刚度串联而成。试验和有限元分析结果均表明,影响总扭转刚度最主要的因素是檩条厚度。
Changing the thickness of the roof, the thickness of the purlin, the web height of the purlin and the form of standing seam support, the full-scale test was carried out on 28 sets of profiled roof slats. The total torsional stiffness and total torsional stiffness of the system were studied. The ANSYS finite element analysis software was used to analyze the torsional stiffness of the roof slab, standing seam support and purlins. The analysis results agree well with the experimental results. The calculation formula of torsional stiffness of roof slab, vertical seam support and purlins is proposed. The test results and the results of finite element analysis were compared to obtain the total torsional stiffness of the system by the roof panels, braces and purlin three in series torsion stiffness. The results of the experiment and finite element analysis show that the most important factor affecting the total torsional stiffness is the thickness of the purlin.