吴淞瞭望塔结构设计与分析

Structural Design and Analysis of Wusong Watchtower

本瞭望塔为钢筋混凝土筒体高耸结构,基础采用钢管桩水上高桩承台,上部结构采用抗震性能设计方法并选用适宜的抗震性能目标。结构进行下部塔基平台与上部塔体的整体抗风及抗震分析计算,尤其针对高耸结构特点,采用MIDASGEN程序对塔体的重力二阶效应、温度作用(日照温差及季节温差)及型钢布置原则进行专项补充分析,同时进行了塔体的风洞试验数值模拟,以满足承载力极限状态和正常使用极限状态的结构设计要求。

The watchtower is a high-rise reinforced concrete tube structure with steel pipe pile cap on water as its foundation.The design method of seismic performance is adopted and the appropriate seismic performance target is selected.The overall wind and seismic analysis and calculation of the lower tower foundation platform and the upper tower body are carried out,especially for the characteristics of high-rise structures.The MIDAS GEN program is used to supplement the analysis of the second-order gravity effect,temperature effect (sunshine temperature difference and seasonal temperature difference) and the layout principle of section steel.At the same time,the numerical simulation of the wind tunnel test of the tower body is carried out to meet the bearing capacity and normal service limit state for structural design requirements.