Methods Of Appraising The Existing Structural Reliability Basing On Own Information

Appraising the existing structural reliability is an important embranchment of the theory about reliability. Today, the methods of appraising the existing structural reliability that is used in our country generally belong to applied methods, but the expression about verifying the bearing capacity in this method is educed according as statistical information of future structures. Because the statistical property of existing structural loading and resistance is obvious different form the future structure, the methods can't reflect the statistical property of existing structural. The expression about verifying the bearing capacity should be found according as the statistical property of existing structural loading and resistance.It is the researchful purpose of this paper that the methods of appraising the existing structural reliability basing on own information are found, which will impel the methods of appraising the existing structural develop from applied methods to probability methods. The contents of this paper have mainly four, including: firstly, the normal value of permanent load in the existing structure is ascertained by the way that is called Bayes-small capacity, which considers the dates of design and the road-test dates. Secondly, by introducing the random variable that is statistical ambiguity, the statistics of loading and resistance of existing structure are researched. Thirdly, the factors of affecting the coefficient of variation of existing structural resistance are simply analyzed. Lastly, the expression about verifying the bearing capacity is studied according as the statistical property of existing structural loading and resistance, the advises ofmodifying the distribution coefficient of permanent load and resistance in the expression are put forward, and the methods of appraising the existing structural reliability basing on own information are found.The researchful progeny of this paper will help us to infer the statistical property of existing structural loading and resistance that answer to the existing structure and help us to reasonably estimate the existing structural reliability. In addition, the researchful progeny of this paper may help to develop the standard of appraising the existing structure that is used in our country, which will impel the methods of appraising the existing structural develop from applied methods to probability methods.