Abstract

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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

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.