A New System for Dynamic Deflection Measurement of Highway Bridge

Abstract

The bridge deflection measurement is an important component to the bridge examination and a important target to the security appraises. Using Slope sensor to test the Dynamic deflection is a good way for highway bridge deflection detection. In this paper, we develop a new slope sensor and new theory to fast calculate deflection from slope angle. It has been use to detect the dynamic deflections of songhuajiang bridge on Harbin-Changchuen highway when car cross at kinds of speed. The test result indicates: comparing with the measurement results of photoelectric deflection detection system, the dynamic deflection measurement results of slope sensors are much closed. Their deflection curves are also similar. The result also shows: Using our slope sensors to test highway bridge dynamic deflection can get precise results and can satisfy the highway bridge deflection testing request. It is also very easy to use. You can finish the testing easily and do not stop the traffic.