The evaluation of the large-scale bridge is complicated, and the evaluation methods are limited in theory, it is very difficult to ensure the reliability of the result.
由于大型桥梁评估的复杂性，目前各种评估方法在理论上均有一定的局限性，单纯应用某一种方法进行评估，很难保证评估结果的可靠性。
Models of reliability analysis were established and calculation methods of the models were discussed with consideration of load history for the evaluation of existing bridge structures.
针对既有桥梁结构的特点，建立了考虑荷载历史的可靠度分析模型，并讨论了其计算方法。
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