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首页> 外文期刊>Journal of aerospace engineering >Structural Health Monitoring and Model Updating of Aizhai Suspension Bridge
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Structural Health Monitoring and Model Updating of Aizhai Suspension Bridge

机译：艾寨悬索桥结构健康监测与模型更新。

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A complete structural health monitoring system has been implemented on Aizhai Suspension Bridge for monitoring its health status and assessing its safety for long-term services. This system consists of nearly 112 sensors of various types, including four subsystems: automatic data collection subsystem, artificial maintenance management subsystem, early safety warning and comprehensive assessment subsystem, and centralized database management subsystem. The deployments and functions of this structural health monitoring system are first introduced in this paper. Then, a finite-element model updating method, which combines the substructure method with the response surface model updating method, is proposed to reconstruct the actual working state of this suspension bridge in the early safety warning and comprehensive assessment subsystem. In the remaining part, the temperature fields, strain responses, tension forces of the hangers, longitudinal displacements of the stiffening girder, and the meteorological temperature are analyzed. Through the statistical analysis, the relationship between the temperature fields was found; the temperature fields induced strains of the stiffening girder satisfies the linear relationship. The cumulative probability distribution function of the cycle-index of the same daily stress amplitude follows a Weibull distribution. The monitored relative longitudinal displacements of the stiffening girder are linearly related with the meteorological temperatures. The monitored tension forces of the hangers verify the effects of the suspender-free zones of main cables on the normal hangers for this pylongirder detached suspension bridge. (C) 2016 American Society of Civil Engineers.
机译：在爱寨吊桥上已实施了完整的结构健康监控系统，以监控其健康状况并评估其长期服务安全性。该系统由近112种各种类型的传感器组成，包括四个子系统：自动数据收集子系统，人工维护管理子系统，早期安全预警和综合评估子系统以及集中式数据库管理子系统。本文首先介绍了该结构健康监视系统的部署和功能。然后，提出了一种将子结构方法与响应面模型更新方法相结合的有限元模型更新方法，以重构该悬索桥在安全预警与综合评估子系统中的实际工作状态。在其余部分中，分析了温度场，应变响应，吊架的拉力，加劲梁的纵向位移以及气象温度。通过统计分析，发现温度场之间的关系。温度场引起的加劲梁应变满足线性关系。相同日应力振幅的循环指数的累积概率分布函数遵循韦布尔分布。监测的加劲梁的相对纵向位移与气象温度成线性关系。吊架的受监控张力验证了该pyyrirder分离式吊桥在正常吊架上的主电缆无吊带区域的影响。 （C）2016年美国土木工程师学会。

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