高耸塔结构动力特性的监测与分析  

Measuring of environment vibration and analysis of dynamic characteristics for tall tower structures

作　　者：张晓志[1] 于双久[1] 

机构地区：[1]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《地震工程与工程振动》1999年第3期7-15,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金

摘　　要：使用适合于高柔结构的测试系统和测试技术， 监测了中央塔、陕西塔和天津塔在环境振动激励下不同高程的加速度反应。使用在ＭＡＴＬＡＢ 语言环境下编制的数据处理、分析、模态识别程序在微机上对各测点输出信号进行了处理、分析、识别得出了３ 座塔结构平动前１０ 阶模态频率和前３ 阶模态阻尼比，中央塔和陕西塔前７ 阶模态振型、天津塔前５ 阶模态振型； 识别得出了３ 座塔结构转动前２ 阶模态频率和阻尼比。通过对识别结果的讨论分析， 作者认为： 分析方法和程序成功、可靠； 得出的结果符合常规认识， 具有较好精度， 满足工程需要。高耸塔结构原型脉动测试与模型试验， 理论计算结果进行对比相互补充，The acceleration responses of Central, Shanxi and Tianjin television and broadcasting towers in environment vibration are measured The output signals are processed and analyzed in personal computer by using the programs in MATLAB language The first ten shear mode frequencies and the first three damping ratios of all three towers, the first seven shear vibration modes of Central and Shanxi towers, the first five shear vibration modes of Tianjin tower, and the first two torsional mode frequencies and damping ratios of all three towers are gotten by using the method of identification The methods and programs used in the paper are successful and reliable The results with important meaning for aseismic design and disaster reduction of television tower have fine precision and can meet the engineering needs

关 键 词：高耸塔结构 脉动测试 动力特性 抗震设计 

分 类 号：TU352.104[建筑科学—结构工程]