| Reinforced concrete bridge in service stage,concrete carbonization, corrosion ofsteel, load of the uncertain factors, the reinforced concrete bridge structure stabilitygradually decreased, eventually leading to the bridge collapsed, and affect people’s lifeand property safety. So the bridge structure assessment and analysis of service life isvery meaningful.Existing reinforced concrete bridge structure stability assessment and service lifeprediction of the analysis of our country at this stage is urgently needed to solve theproblem in engineering field. Because of the existing problems, this paper uses thestructural reliability time-varying theory, the reinforced concrete bridge in service oftime-varying reliability research, and on the bridge structure of stage state evaluation,by the structure resistance attenuation model and the overall analysis on the bridge, thebridge specific use cases and the latter need reinforcement scheme. To ensure that thebridge can be safely. The following is the main content of this paper:1, according to the depth of carbonation of stochastic model for analysis ofconcrete carbonization on the structure resistance attenuation effects. According to thearea of steel bar corrosion on the changes of model analysis of structure resistanceattenuation effects. According to the concrete strength time-varying model analysisstrength time varying on the structure resistance attenuation effects. Set the limit stateequation and the reliability index calculation method.:2, the reinforced concrete bridge structure stability attenuation law, on the bridgelate life and strengthening scheme to provide advantageous basis.3, in reference to domestic and foreign literatures, this paper introduces a constantload normal distribution model and vehicle load of non normal distribution model, and according to the general operation and intensive operation in two states wereestablished service vehicle maximum value distribution function. |
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