Diagnostic Testing of a Vertical Lift Truss Bridge for Model Verification and Decision-Making Support
Diagnostic Testing of a Vertical Lift Truss Bridge for Model Verification and Decision-Making Support
复制标题
垂直升降桁架桥的诊断测试，用于模型验证和决策支持
DOI：
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发表时间：
2019
影响因子：
3
通讯作者：
Erin Santini
中科院分区：
文献类型：
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作者：
Vahid Shahsavari;Maryam Mashayekhi;Milad Mehrkash;Erin Santini
一个实用的长期结构健康监测计划必须基于合理的现场能力、桥梁业主的需求以及结构特有的预期结构行为。作为监测程序的一部分安装的每个传感器应直接提供信息，以响应与结构的短期和长期性能相关的操作需求。与桥梁设计师、桥梁管理者、桥梁维护运营商和学术研究人员合作开发的经过深思熟虑的仪器计划将提供数据，以提高桥梁结构设计、管理和维护的实践水平和最先进水平。监测桥梁的结构响应有可能a）检测结构变化的存在以进行状态评估，B）通知桥梁管理人员以协助日常运营决策，以及c）验证结构设计假设，以及（d）改进桥梁的结构模型以用于性能预测。这些响应的激励通常来自交通或环境需求。垂直升降桥提供了一个独特的机会，结构健康监测的基础上的动态响应，由于频繁和重复的影响，赋予结构每次升降跨度打开和关闭。在本文中，结构健康监测系统的设计提供有价值的信息，设计验证，结构模型校准，疲劳监测，运营决策支持的重建纪念桥承载美国1号公路之间的朴茨茅斯，新罕布什尔州和基特里，缅因州。本文将详细介绍传感器布局的发展，包括利益相关者的投入，可访问性问题以及互补和矛盾的目标。基于结构性能目标建立了一组复杂程度不同的结构模型。伪静态卡车荷载试验期间收集的数据用于校准桥梁的结构模型，并为与结构性能相关的每个后处理和决策工具选择合适的模型。
A practical long term structural health monitoring program must be based on reasonable field capabilities, the needs of the bridge owner, and the anticipated structural behavior unique to the structure. Each sensor installed as part of the monitoring program should provide information directly in response to an operational needs related to the structure’s short term and long term performance. A thoughtfully considered instrumentation plan developed in cooperation with the bridge designer, bridge manager, bridge maintenance operator and academic researchers will provide data to enhance both the state of the practice and state of the art for the bridge structural design, management and maintenance. Monitoring a bridge’s structural response has the potential to a) detect the presence of structural changes for condition assessment, b) inform the bridge manger to assist in daily operational decision-making and c) validate the structural design assumptions and (d) refine a structural model of the bridge to be used for performance prediction. The excitation for these responses typically comes from traffic or environmental demands. Vertical lift bridges provide a unique opportunity for structural health monitoring based on the dynamic response due to the frequent and repeated impact imparted on the structure each time the lift span open and closes. In this paper, a structural health monitoring system designed to provide valuable information for design verification, structural model calibration, fatigue monitoring, and operational decision-making support for the reconstructed Memorial Bridge carrying US Route 1 between Portsmouth, New Hampshire and Kittery, Maine. This paper will detail the development of the sensor layout including input from stakeholders, accessibility issues and complementary and contradicting objectives. A set of structural models with varying degrees on complexity were created based on the structural performance objectives. The data collected during a pseudo-static truck load test was used to calibrate the structural models of the bridge and to select the appropriate model for each post-processing and decision-making tools related to structural performance.