Power monitoring method and system for bridge support damage

The invention provides a power monitoring method and system for bridge support damage, and belongs to the technical field of engineering monitoring. The method comprises the following steps: installing a strain sensor at a beam bottom near a bridge support; measuring the dynamic strain response under the vehicle-mounted action; calculating a first-order strain modal transverse distribution shape of the beam bottom according to Fourier transform; and judging whether the support is damaged or not according to the change of the shape of the strain mode, and quantifying the damage according to the change quantity of the shape of the strain mode. The bridge support damage monitoring is converted into beam bottom transverse dynamic strain monitoring, the damage can be accurately and timely identified, the damage degree can be quantified, a new method is provided for bridge support damage monitoring, and the structure is simple, the cost is low and the market competitiveness is high. 本发明提供了一种桥梁支座损伤的动力监测方法及系统，属于工程监测技