Two structural systems for a 350-meter-tall multifunctional TV tower based on architectural re-quirements 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 is-sues,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
Key words
TV tower/Inclined structure/Asymmetric cantilever/Eccentric moment/Structural design
维普
万方数据