佘广军，  孟昭沛，  吴  栋
    （南京市建筑设计研究院有限责任公司，南京 210005）

[摘要] 观光塔形式结构既具有高耸结构典型特征，又因顶部观光平台集中了较大的竖向和水平荷载，使其对重力二阶效应更加敏感。通过建立一系列不同结构形式和不同高宽比的观光塔简化模型，利用有限元分析软件，对风荷载作用下塔体的重力二阶效应进行计算分析。根据计算结果，分析对比不同形式塔体顶部最大位移和底部最大反力对重力二阶效应的敏感程度。
[关键词] 观光塔；高耸结构；几何非线性；重力二阶效应
中图分类号：TU398.7    文献标识码：A    文章编号：1002-848X(2012) Sl-0402-04

Analysis on gravity second-order effects of high-soft structures with sight-seeing tower
She Guangjun, Meng Zhaopei, Wu Dong
( Nanjing Architectural Design and Research Institute Co.,  Ltd.,  Nanjing 210005, China)

Abstract: The sight-seeing tower is more sensitive with gravity second-order effects, because not only it has the typical model characteristic of lugh-rise structures, but also its top sight-seeing trip bench concentrates much more vertical and horizontalloads. By building a series of simplified models with different structure types and different ratios of high to width, this paper makes calculation and analysis on the gravity second-order effects with the tower under the action of wind loads. According to the result of the calculation, it contrasts the gravity second-order effects sensitive degree of different tower's top biggest displacement and bottom biggest force.
Keywords: sight-seeing tower; lugh-rise structure; geometrical nonlinearity; gravity second-order effects