Measurement method for testing incremental internal force of arch bridge suspension rod using inertia method

Provided are a measurement method for testing the incremental internal force of an arch bridge suspension rod using an inertia method, the measurement method comprising the following steps: (1) selecting a suspension rod which needs to be tested for incremental internal forces, and mounting an acceleration sensing apparatus or a velocity sensing apparatus on the lower edge of the suspension rod to be tested; (2) setting an appropriate sampling frequency, and beginning signal acquisition; (3) using a formula to process the information data collected in step (2); (4) recording the results of information data processing to obtain the suspension-rod internal force increment. In the present invention, an acceleration or velocity signal is acquired from the lower edge of the suspension rod, and the suspension-rod internal force increment can be obtained by means of simple calculation of said signal, and the invention has the advantages of easy operation, high reproducibility, and low testing cost.