Method and system for testing bonded prestress in bridge body based on stress release

The invention relates to the technical field of bridge engineering detection, in particular to a method and a system for testing bonded prestress in a bridge body based on stress release. The method provided by the invention comprises the following steps: determining a target steel beam and a cutting position of the target steel beam; determining a first position and a second position according to the lay length of steel wires in the target steel bundle; respectively stripping the concrete at the cutting position, the first position and the second position until the target steel wire is exposed; installing a first strain sensing element and a second strain sensing element at the first position and the second position respectively; the target steel wire is cut at the cutting position, and first strain data and second strain data are obtained through the first strain sensing element and the second strain sensing element respectively; and the bonded prestress of the target steel wire is obtained through the firs