Once some bridge particularly the essential one expires, it can cause city paralysis and creates huge direct and the indirect economic loss, so the damage identification on the bridge structure is essential. 一旦某一座桥梁失效,尤其是关键桥梁,可能导致城市市区交通的瘫痪,并且造成巨大的直接和间接经济损失。因此,对于桥梁结构进行实时的健康检测和损伤识别十分必要。