多层空腹钢桁架竖向承载受力机理研究

以新保利大厦工程实例为背景，通过算例，对多层空腹钢桁架竖向承载的受力机理进行了研究。分析了弦杆、腹杆的内力分布规律和受力机理，讨论了腹杆间距与弦杆截面尺寸的相关性，结果显示，腹杆间距与弦杆截面密切相关，腹杆对改善弦杆受力性能有重要作用。提出了弦杆、腹杆截面的简便估算方法，可为多层空腹钢桁架的推广应用提供参考。

Study on the Mechanism of Vertical Loads Bearing for Multi- storey Vierendeel Truss

Under the engineering background of the new Poly Plaza, through a lot of examples, the mechanical characteristics of vertical loads bearing were studied for multi - storey steel Vierendeel Truss. In this study, it was analyzed for the internal force distribution of the chord and abdominal bar. Then the relationship was discussed between abdominal bar spacing and chord section size. The results show that abdominal bar spacing and chord section size are closely related. And abdominal bars are important in the aspect of improving mechanical properties of the chord. On this basis, a simple method of estimating chord and abdominal bar section was proposed. This article provides a reference for the application of the multi -storey steel Vierendeel Truss.