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基于可靠度理论,在单梁失效概率基础上,通过分析计算得出了主梁体系可靠度。对于横向联系无损伤桥梁,采用失效指标法求取权值,进而加权得出体系可靠度。同时,对于横向连接有损伤的桥梁,以最大横向分布影响线为基础,把体系失效概率分离为失效系数和单梁名义失效率的乘积,并通过刚接状况的模型试验分析了失效系数的规律,推导出了计算公式,定量计算出了体系可靠度。
Based on the reliability theory, based on the single beam failure probability, the reliability of the main beam system is obtained through the analysis and calculation. For horizontal connection of bridge without damage, using the failure index method to get the weight, then we can obtain the system reliability by weighting. At the same time, based on the maximum transverse distribution influence line, the probability of system failure is separated into the product of the failure coefficient and the nominal failure rate of the single girder, and the law of the failure coefficient is analyzed through the model test of the newly connected condition. , Deduced the calculation formula, and calculated the system reliability quantitatively.