某张弦结构大直径钢棒拉应力计算探讨

CALCULATED DISCUSSION OF TENSILE STRESS OF BIG DIAMETER STEEL BAR OF A BEAM STRING STRUCTURE

以珠海保税工业园区中心展厅的主刚架下弦钢棒为例,通过考虑杆件内力和杆件二阶变形效应,推导出跨高比较大的张弦结构大直径钢棒的变形和内力计算方法。理论与有限元分析结果表明:该计算方法是正确的,可以为类似结构钢棒应力的设计和施工分析提供参考。

Take the lower boom steel bar of the main frame in Zhuhai Industrial Park as an example,it deducted the calculated method of the big diameter deformation and the internal force in the beam string structure with big span-depth ratio,by means of considering the internal force of the member bar and the effect of the second-order of the deformation of the member bar.Theoretical and finite element analysis show that this method is correct and can be used as reference for designing similar steel bar stress and construction analysis.