| Combining Large-scale commercial finite element software, in the foundation of static analysis of cable-stayed bridge structure, carries on the statistical analysis of the load effect of constant load and live load in bridge, and calculates the statistical value of random variable in the systematic reliability computation of cable-stayed bridge, and then establish the failure limiting condition equation of each main member. After established limiting condition equation, calculate the reliability by JC method program that was edit by us in the MATLAB platform. The main research contents include the following:1. Simplify model. According existed data, adopt some simplifying principle, and simplify double-tower cable-stayed bridge structure. Finally, analyze a half of model followed along-bridge, then cable-stayed bridge would be simplified to the series-parallel connection mixture structure system that consist of power, girder, bank-cable and river-cable.2. Separately calculated the three reliabilities of cable tower, girder and cable. For cable tower, considered the across-bridge flectional failure pattern and the along-bridge intension destroy failure patter; for girder, considered the flectional intension failure pattern; for cable, considered the tension failure pattern.3. In order to calculating systematic reliability, carried on mathematics simplify to a half of cable-stayed bridge structure, then would have analyzed 8 kind of main failure patterns of cable-stayed bridge structure.4. Calculated the systematic reliability of cable-stayed bridge structure.5. Analyzed how sensitive parameter of each random variable influence reliability index.
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