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首页> 外文会议>3rd International Workshop on Structural Health Monitoring, Sep 12-14, 2001, Stanford University >Life Time Assessment of Exisiting Bridges
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Life Time Assessment of Exisiting Bridges

机译：现有桥梁的寿命评估

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摘要

The prediction of a realistic lifetime and the prolongation of the service life of a structure is an important task to reduce costs. The usual theoretical predictions are not very reliable. The prediction model used consists of a load model, a system-transfer model and a damage model. The results of these sequentially coupled models are usually unreliable, especially the influence of the uncertain load and damage models controls the reliability of the result. A method based on monitoring strategies is presented, which avoids these problems. Expected trends of future traffic, are considered. If the remaining life time of existing structures should be assessed, information about the strain time history of the past is needed. It is shown how these data can be generated taking into account the estimated statistics of the load in the past, the dynamic behaviour and the bumpiness of the road. Synthetic time series of the local strains are generated which include the real statistics of the process and cluster effects induced by truck convoys.
机译：预测实际寿命和延长结构使用寿命是降低成本的重要任务。通常的理论预测不是很可靠。所使用的预测模型包括负载模型，系统转移模型和损坏模型。这些顺序耦合模型的结果通常是不可靠的，尤其是不确定载荷和损坏模型的影响控制了结果的可靠性。提出了一种基于监控策略的方法，避免了这些问题。考虑了未来流量的预期趋势。如果应评估现有结构的剩余寿命，则需要有关过去应变时间历史的信息。显示了如何根据过去的负荷，道路的动态行为和崎iness不平的估计统计信息生成这些数据。生成了本地应变的合成时间序列，其中包括卡车车队引起的过程和簇效应的真实统计数据。

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