摘要
Abstract
Architectural shape of Nanchang Greenland main tower crown is quite complex;In addition,the height of the crown is 53 m,which locates above the main tower structure whose height is 250 m.The design of the crown structure is critical to the whole project which is complicated and difficult.Structural system of the crown structure and the structural member layout strategy for satisfying the architectural shape is proposed.Critical load value of the crown structure is discussed.Then,several specialized analyses and research are presented to tackle problems due tohigh location,special building shape and complicated relationship among members of the crown structure.Whiplash effect is evaluated,seismic force magnification factors due to the whiplash effect is calculated.Buckling analysisof the key columns isconducted,the effective length factors of these columns are obtained through elastic buckling theory.The key outer frame connection is analyzed using ANSYS software,and the stress state of the connection is still elastic under the critical loading case.Finally,based on these analyses,the design result of the crown is provided,and the overall indicator and structural member design result both satisfy the code requirements.The analysis and design strategy of the crown structure can provide benefit reference forsimilar projects.关键词
超高层结构/塔冠结构/鞭梢效应/屈曲分析/ANSYS节点分析Key words
high-rise building/crown structure/whiplash effect/buckling analysis/ANSYS joint analysis
