对金茂大厦“粗指纹”诊断初探

Preliminary Healthy Diagnosis on Jinmao Tall Building

金茂大厦是目前中国最高建筑之一,高达420.5m。本文采用自回归移动平均ARMA模型,利用大厦的随机振动得到其某些振型的频率及阻尼比,在地震、台风过后或经一长段时间之后,看其相应振型频率和阻尼比的变化,以达到健康诊断之目的。结果显示此法具有很好的可操作性,可用于大厦、大桥等的"粗指纹"健康诊断和维护。

Jinmao tall building is one of hightest building in China with height of 420.5 m.For diagnosing the building＇s healthy status,in other words,its safety,the frequencies of vibration types and damping are obtained from the building vibration by the Auto-regressive and Moving Average Model,and the fequencies and damping before and after earthquake or typhoon,or existing for a long peroid are compared.The result shows that this method is well manipulated and used in healthy diagnosis and maintenance for tall buildings and big bridges.