用模态参数估计剪切型建筑的损伤

Eualuation of Damage to building Using Model Parameters

提出了一种利用不完整模态多数估计结构损伤的方法。不完整模态体现在模态数少于自由度数，测点数少于自由度数。通过不完整模态参数建立了完整的剪切型模型，然后利用结构变化后产生的广义残余力来估计结构的损伤。该方法的优点：（１）不仅可以估计刚度损伤还可以估计质量的变＊化；（２）利用的是不完整模态。最后用该方法对一个结构模型的振动台试验的结果做了分析。

A structural damage evaluation method is presented and an uncompleted model is used in this method. A shear model of builiding is evaluated using the uncompleted modes and structural damage is evaluated using residual forces caused by structural changes. This method has advantages: (1)Changes in stiffness and mass can be evaluated at the same time; (2)Uncompleted modes are used in this method.*