350m复杂形体电视塔结构方案设计  

Structural Design of a 350m Complex-shaped TV Tower

作　　者：包联进[1,2] 邱介尧 孙战金 何梦杰[1,2] Bao Lianjin;Qiu Jieyao;Sun Zhanjin;He Mengjie(East China Architectural Design&Research Institute Co.,Ltd.,Shanghai 200002,China;Shanghai Engineering Research Center of Super High-Rise Building Design,200002,China)

机构地区：[1]华东建筑设计研究院有限公司,上海200002 [2]上海超高层建筑设计工程技术研究中心,200002

出　　处：《特种结构》2024年第6期49-56,共8页Special Structures

基　　金：上海市社会发展科技攻关项目(20DZ1202002);华东建筑设计研究院有限公司科研项目(K2224S30101)。

摘　　要：某多功能电视塔高度350m,结合建筑要求,提出塔身采用混凝土外筒+混凝土内筒和钢结构外筒+钢结构内筒两种结构体系。介绍电视塔的荷载取值、控制指标、结构布置,以及模态振型、倾覆弯矩、水平变形的分析结果。结果表明,需注意结构在竖向荷载下存在着显著的倾覆力矩和水平变形。针对塔身偏置倾斜、塔楼不对称的特点,提出了减轻塔楼重量、优化外筒墙厚、施加不对称预应力等措施减小偏心弯矩;在筒体内设置竖向预应力,改善外筒受力性能、控制受拉裂缝;扩大底板区域、调整桩位布置、设置抗拔桩等方法应对基础受拉的问题。利用参数化方法对开洞混凝土筒进行分析,得到随着开洞率的增加,结构的水平变形明显增大,且有非线性增大的趋势,但较小的开洞率对结构刚度的影响不大。Two structural systems for a 350-meter-tall multifunctional TV tower based on architectural requirements are proposed:a concrete outer tube with a concrete inner tube,and a steel outer tube with a steel inner tube.This paper introduces the load values,control indicators,and structural layout of the TV tower,and discusses the analysis results of the modal vibration modes,overturning moments,and horizontal deformations.The analysis indicate that significant overturning moments and horizontal deformations exist under vertical loads,which require attention.To address the characteristics of tower tilt and asymmetry,measures such as reducing the tower weight,optimizing the outer tube wall thickness,and applying asymmetric prestressed reinforcement are proposed to reduce the eccentric bending moments.To improve the stress performance of the outer tube and control tensile cracks,vertical prestressed reinforcement can be set in the tube.To address foundation tensile issues,expanding the base area,adjusting pile positions,and setting up uplift piles are suggested.Analyzing the concrete tube with openings using a parametric method,the results indicate that as the opening rate increases,the horizontal deformation of the structure significantly increases and follows a nonlinear growth trend.However,a small opening rate has little impact on structural stiffness.

关 键 词：电视塔 倾斜结构 不对称悬挑 偏心弯矩 结构设计 

分 类 号：TU318[建筑科学—结构工程]