The time-varying reliability of existing bridge on bearing capacity was discussed based on fuzzy evaluation and Markov process.
基于模糊评价和马尔科夫过程，研究了在役桥梁承载力可靠度的时变规律。
Based on the practice, it presents the principles and calculations of the external prestressing applied to strengthen the existing bridge.
结合实践，介绍了体外预应力加固旧桥的原理及配筋计算方法。
On the basis of fuzzy failure criterion, model of reliability of concrete box-girder bridge is set up, and the reliability of existing bridge is calculated.
基于模糊失效准则建立了混凝土箱梁桥的可靠度计算模型，并计算了一座实桥基于模糊失效准则的可靠度。
In order to make the existing bridge safety operation and extending its safe service period, the bridge health monitoring and safety assessment should be done in a real-time way.
为了保证既有桥梁的安全运营和尽可能延长它的正常使用年限，应对其进行实时健康监测与安全性评估。
Software is studied and programed for analyzing the ultimate bearing capacity of the new and old bridge, and appraising the existing bridge.
该软件主要用于新、老桥的极限承载能力分析以及桥梁现状的识别鉴定。
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。
Through the monitoring example, to monitor and control the existing bridge was proved to be an effective means of guaranteeing its safety and performance when constructing the new trestle.
通过监测，说明对既有桥梁进行监控是保证既有桥梁安全性和使用性能的有效手段。
With the increase in speed for trains the existing bridge plate rubber support shows its shortcoming-its lateral displacement is considerable, which is a hidden danger for traveling trains.
随着列车的提速，现有桥梁平板橡胶支座暴露出“横向位移过大”之缺陷，对行车构成安全隐患。
The distributing vector of bridge condition on bearing capacity was predicted for new bridge, existing bridge and the bridge undergoing reinforcement. A new prediction index was put forward.
针对新建桥梁、在役桥梁以及考虑加固的桥梁分别给出其承载力可靠度分布向量预测公式，并提出承载力预测指标。
The method is proved feasible and practical through being applied to the practical project, with an intuitionist and simple result of evaluation reflecting the safety status of existing bridge.
通过实际工程检验，评价结果直观简单，较好地反映了在役桥梁结构的安全性状况，证明了该评价方法的可行性与实用性。
The method is proved feasible and practical through being applied to the practical project, with an intuitionist and simple result of evaluation reflecting the safety status of existing bridge.
通过实际工程检验，评价结果直观简单，较好地反映了在役桥梁结构的安全性状况，证明了该评价方法的可行性与实用性。
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