Long-span Suspension Bridge Liang Jiankang Monitoring Study

The long span bridge monitoring system can provide a series scientific accordance and guidance for bridge supervision and maintenance .It contributes to prove the new craft, the new material and design .In addition, it plays an important role in prolong -ing the life period and ensuring the safety of the bridge. Based on the present state of bridge monitor, the study of suspension bridge monitor was applied to Yichang Bridge in this paper.First, the design of bridge monitoring system was commented ,including the main content and instrument of bridge monitoring system . How to choose and install the sensing device in the bridge was introduced in the paper .Some methods of nondestrct -ive examination and health diagnose were put forward .Second, the bridge monitor -ing system was practiced in Yichang Bridge for experiment .The practical formula derivation and its error analysis was deduced in the 4th part of this paper.According to the actual statistic data ,contrasted analysis shows the health state of the bridge . Finally, the paper introduced the study of fuzzy theory in the experiment bridge ,and created a set of evaluation theory about the suspension bridge's health state .