BRIDGE TESTING AND EVALUATION METHOD AND APPARATUS BASED ON IMPACT VIBRATION

摘要

A bridge testing and evaluation method and apparatus based on impact vibration. The method comprises: a bridge back analysis step based on reference-free sub-block impacting, and a forward bridge analysis step based on incremental impact loading, wherein the bridge back analysis step based on reference-free sub-block impacting is used to rapidly find and screen small- to medium-scale bridges having greatly insufficient load carrying capacity in a road network, and the forward bridge analysis step based on incremental impact loading is used to evaluate actual load carrying capacity of those bridges passing the back analysis screening and having better safety. The apparatus integrates testing and analysis functions, and mainly comprises a vehicle-mounted hydraulic impact device (6), a mobile hydraulic impact device (9), a signal transmitting and acquisition system (3), a data analysis system (4), etc. The apparatus is applied to back and forward bridge analysis. The method of the present invention enables low-cost and highly efficient testing and evaluation of small- to medium-scale bridges in a road network.