The invention relates to a bridge reliability predicting method and a maintenance method of a bridge. The bridge reliability predicting method comprises the following steps: (1) monitoring the limit state of bearing capacity: (1-1) monitoring the limit state of bending bearing capacity of a mid-span front section; (1-2) monitoring the limit state of the shearing bearing capacity of a fulcrum oblique section; (2) monitoring a normal use limit state: (2-1) measuring bridge crack width; (2-2) monitoring a deflection limit state; (3) monitoring a limit state of reinforcement stress; (4) monitoring a limit state of concrete stress; (5) comparing monitoring data with preset data according to the monitoring data obtained in step (1) to step (4), thus obtaining bridge reliability. Through carrying out research on a bridge preventive maintenance model based on bridge material fatigue degradation and structure reliability decay prediction, a bridge material fatigue degradation rule and influence factors and an influence rule of the bridge structure reliability decay are explored, and a decay rule of the bridge material fatigue degradation along with time and a prediction method of the residual life of the bridge are summarized.

Bridge reliability predicting method and maintenance method of bridge

The invention discloses a maintenance measure decision method based on road disease causes. The method comprises the following steps: (1) calculating the distribution probability of the disease causes; (2) calculating the distribution probability of maintenance measures based on the disease causes; (3) according to the detection of the pavement performance, determining the POI (Pavement Quality Index), and calculating the application effect threshold value U of the maintenance measures; (4) selecting the maintenance measure with the maximal distribution probability of maintenance measures based on the disease causes, and judging the application effect of the maintenance measure on each disease cause: if the application effect is larger than or equal to the application effect threshold value U of the maintenance measures, selecting the maintenance measure as the maintenance measure of the corresponding disease cause. The method comprehensively considers the contribution of happend or unhappened disease phenomena to the road disease causes, comprehensively considers the applicability and pertinence of the maintenance measures, can quickly provide maintenance measure decision, and is convenient for late data extension and perfection.

Maintenance measure decision method based on road disease causes

The embodiment of the invention provides a road network level road infrastructure structure comprehensive maintenance decision-making method and system, and the method comprises the steps of determining an analysis object, obtaining the historical data of the analysis object, and forming an analysis data matrix based on a road network collection degree; performing classification and interval distribution statistics on the historical data of the analysis object to obtain a road network level road infrastructure structure overall technical condition evaluation target value; performing the comprehensive maintenance decision calculation according to the analysis data matrix, the global optimization objective function, the weight coefficient corresponding to the analysis object and the sub-item treatment cost corresponding to the analysis object to obtain a maintenance scheme and a maintenance opportunity; and carrying out the capital distribution, and inspecting the maintenance effects before and after maintenance. The embodiment of the invention is suitable for the comprehensive maintenance decision between different parameters of the road network level road infrastructure with the same road network collection degree, and is also suitable for the comprehensive maintenance decision between the same parameters of the road network level road infrastructure with different road network collection degrees.

Road network level road infrastructure structure comprehensive maintenance decision-making method and system

Decision-making method for maintaining middle and small span concrete bridges

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Decision-making method for maintaining middle and small span concrete bridges