A Time-domain Fusion Analysis Method of Bridge Structure Dead Load Response

Abstract

The invention relates to a bridge structure constant load response time domain fusion analysis method, and belongs to the field of bridge structures. The method comprises the following steps: S1, extracting and analyzing bridge monitoring data at the same temperature, and eliminating the influence of temperature effects; S2, reducing the influence of random interference utilizing a time domain averaging technique; S3, extracting a bridge constant load response characteristic quantity utilizing an autoregressive integrated moving average model; and S4, performing data fusion on the acquired bridge structure constant load response information through a fuzzy support vector machine to obtain a final TDFA(Thulium Doped Fiber Amplifier) analysis result. According to the bridge structure constant load response time domain fusion analysis method, on the premise that the influence of temperature factors is eliminated and the influence of random factors is reduced, the characteristic quantity representing the changing condition of a structure constant load response is directly extracted from complex bridge safety operation monitoring signals, the slow evolution process of variables in a whole monitoring period is deeply analyzed, and scientific reference bases are provided to the technicians for management and maintenance of in-service bridges.

Description

technical field [0001] The invention belongs to the field of bridge structures and relates to a time-domain fusion analysis method for dead load responses of bridge structures. Background technique [0002] Bridge safety operation monitoring generates a large amount of data every day. How to dig out bridge structure safety information from the massive monitoring data and give early warning of possible safety hazards is the focus and difficulty of technical personnel's research. At present, the technical accumulation in this field is still relatively weak, and the research results are relatively few. The most common method is limited to the real-time alarm method of setting the usage threshold of each monitoring variable. The setting of the usage threshold is generally based on the calculation results of the finite element model, supplemented by standards and norms for correction. However, when the boundary conditions of many models are difficult to define and the model stru...

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Problems solved by technology

It can be seen that during the whole monitoring period, the strain value of the measuring point fluctuates continuously with temperature fluctuations, and there is a strong correlation between the two. At this time, if the strain data is directly evaluated and judged, it is often impossible to obtain a more accurate analysis results

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