Method to Evaluate Remaining Prestress in Damaged Prestressed Bridge Girders

摘要

In assessing damage to a prestressed bridge girder, it is often necessary todetermine the prestress remaining in the strands. A device was developed to estimate stress level in strands in damaged bridges. A lateral load is applied to a strand exposed by virtue of damage to the concrete and the resulting displacement is measured. A series of tests were performed to calibrate the devices available commercially or developed by other researchers. The special features of the device developed in the project are its simplicity, portability, and versatility.