A Research About Early Warning Of Bridge Damage Based On Time Series Analysis

With the increases of the bridge span, the structural style become more and more complex, furthermore as a result of many uncertain element's influences, the structure extended active duty, ultra limit of service, corrosion, fatigue, even the earthquake, the collision of vehicle, ship and so on, beyond the scope of people's control. This request structure health monitor and the security evaluation system can discover the damage promptly and give early warning as quick as possible.Although many bridges of domestic and foreign have installed the bridge monitor system, but rarely has the researches proposed damage early warning of bridge structures, and how to realize early warning. The bridge damage early warning method should have the data processing, the damage early warning characteristic. To get this goal, this article has done some research to the bridge damage early warning theory, and the technology to realize it.Firstly, It introduced the Time Series analysis method to the analysis of bridge monitor data, and proposed analysis of the monitor data based on the Time Series data processing method (the ARIMA model); And take the actual bridge monitor data as a example, has proven the feasibility of Time Series analytic method (the ARIMA model) in the condition tendency forecast of the bridge.Secondly, It proposed bridge damage early warning method based on the Time Series analysis, and introduced the similar measure method of Time Series (Measure of Distance) to the bridge structure condition recognition field. This gave a new way for the bridge condition recognition and the damage early warning; meanwhile take the actual bridge monitor data as a example, proved the feasibility of the similar measure method of Time Series in the bridge damage early warning.The establishment of bridge damage early warning system has the great practical significance to the bridge structure security, the extension structure service life, the ahead of time discovery indefinite damage accumulates, and discover the real structure response between the bridge structure and the existing bridges in the natural environment to confirm bridge theories. This article has provided the new way for the bridge monitor data processing as well as the bridge damage early warning, and will have certain reference significance to present's research and practice.