宿迁电视发射塔风致响应研究  

Study on Wind-induced Response of Suqian TV Tower

作　　者：付举宏 严亚林[2] 朱悦[1] 邱晖[1] 刘坤[1] 

机构地区：[1]中广电广播电影电视设计研究院,北京100045 [2]中国建筑科学研究院,北京100013

出　　处：《特种结构》2015年第3期38-43,共6页Special Structures

摘　　要：基于高频天平测力试验对宿迁电视发射塔进行了随机风致振动响应分析。"串联多质点系"力学模型被用来模拟电视塔结构,每层质点可考虑两个水平方向的平动位移和绕竖向参考轴的转动位移。通过计算确定了该电视塔不同高度上的风致振动位移响应、加速度响应。计算结果表明,电视发射塔天线部分鞭梢效应显著;采用不同的设计规范计算时,结构的加速度响应区别较大;对于上部质量集中的高耸结构直接按照规范计算底部倾覆弯矩偏小。Wind tunnel high frequency force balance test is applied for Suqian TV tower,and wind induced responses are computed based on test data.In analysis,the structure model is simplified to be multiple degrees of freedom system with lumped masses.In this model,each floor is assumed to undergo lateral and rotational movements with respect to the vertical reference axis.Displacements and accelerations in different heights are computed and results show that the whipping effect of the antenna affects the responses including acceleration and displacement at the top of the antenna.It is also found that for the difference of evaluation of comfort in different codes,the acceleration value has a great difference while the results are computed according to different codes.And it should be noted that for TV tower structure,while the mass of the structure is mainly concentrated to a high part of the structure,its base overturning moment caused by wind calculated by the code may be less than the value calculated from wind tunnel test.

关 键 词：电视发射塔 风致响应 随机振动 高频天平 等效静力风荷载 

分 类 号：TU347[建筑科学—结构工程] TU311.3