拉索预应力巨型网格结构体系-《建筑科学与工程学报》

文章信息/Info

Author(s):: HE Yong-jun, ZHOU Xu-hong, WANG Ji-xin; College of Civil Engineering, Hunan University

Keywords:: super-span; prestressed reticulated megastructure; structure system; rigid-flexible combined structure; research status; prospect

摘要:: 阐述了拉索预应力巨型网格结构体系发展与研究的必然性和必要性；介绍了针对这一体系提出的各种结构形式中拉索预应力的布置原则、受力机理及具体形式；回顾了拉索预应力巨型网格结构体系的研究现状，包括静力及稳定性能、预应力索张力计算及其优化、张拉全过程分析、结构动力特性等。总结了该结构体系中各参数的合理取值，得到了较优的预应力大小及预应力分布比例，提出了针对静力性能的三级优化方法及预应力索张拉施工过程中索力的计算方法，得到了布索后结构的动力特性变化规律。最后对拉索预应力巨型网格结构体系研究的关键问题及发展方向进行了展望。

Abstract:: The necessity and inevitability of research and development on prestressed reticulated megastructure system were described. The cablestrut arrangement principle, force mechanism, and configuration of various prestressed reticulated mega-structures were summarized. The research status on prestressed reticulated mega-structure system was reviewed, including static performance and stability, pretension force of cables and their optimization, whole-process pretensioning analysis, and dynamic characteristics. Some reasonable parameters of the structure were summarized. The optimum values and distribution proportions of the cable pretensions were obtained. The three-grade optimization method for static performances and the method for calculating the required initial strains of cables in the tensioning construction were presented, the variation of the structural dynamic performances were obtained after the pretensioned cables were arranged. Finally, the key and prospect of the research on the prestressed reticulated mega-structure system were discussed.