一种新的预应力空间结构体系-弦支骨架结构

Cable-stayed skeleton structure-a new spatial prestressed structure

提出了一种新的预应力空间结构体系—弦支骨架结构,是由辐射状布置的骨架结构与一道或数道环向布置的弦支体系组成。利用弦支体系调整骨架部分的内力分布,大大降低主梁最大弯矩的峰值,减小主梁的挠度;同时,弦支体系部分对底环梁产生压力,与骨架部分对底环梁产生的拉力可以部分相抵消,大大降低了结构体系对下部结构的要求。采用参数分析法进行了应力优化。通过对弦支骨架结构的受力特性包括抗震特性及整体稳定性能的研究,验证了弦支骨架结构的可实现性。最后,提出了对弦支骨架结构进一步研究的方向。

Cable-stayed skeleton structure is a new type of spatial prestressed structure, which consists of a series of radial beams and stayed cables beneath. Compared with the normal beams, the cable-stayed skeleton structure has much higher rigidity and lighter self-weight. Stress optimization is provided by parameter analysis. Modal analysis, spectrum analysis and global stability analysis are carried out to ensure the reliability of cable-stayed skeleton structure. Based on the studies above, the principle of cable-stayed skeleton structure is developed and further studies about cable-stayed skeleton structure are predicted.