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首页> 外文会议>3rd International Workshop on Structural Health Monitoring, Sep 12-14, 2001, Stanford University >Field Instrumentation of Highway Bridges
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Field Instrumentation of Highway Bridges

机译：公路桥梁现场仪表

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Field instrumentation has been carried out successfully on highway bridges to monitor the short-term and long-term performance of structures. Properly designed and strategically placed instruments can help collect valuable data regarding the condition, the stress and strain, deflection, temperature gradients, and the time-dependent properties, such as creep and shrinkage in a structure. The data may be used to verify the design assumptions, to make modifications, to improve on future designs, to assess the general health of bridges, and to provide valuable information for the bridge management system. This paper describes the instrumentation of two highway bridges. The first bridge is a three-span continuous prestressed concrete I-girder bridge in Washington State. The bridge is constructed of high performance concrete. Five of the girders are instrumented. The instrumentation is intended to evaluate internal concrete temperature during curing, creep and shrinkage of the concrete, prestress losses, camber and deflection. The second bridge is the North Halawa Valley Viaduct in Oahu, Hawaii. The viaduct is over 5,500 feet long. Seven sections of the bridge are instrumented to provide a good representation of bridge behavior. The paper concludes by identifying potential applications of field instrumentation and structural health monitoring techniques to assess the performance and condition of major bridges.
机译：已经成功地在公路桥梁上进行了现场检测，以监测结构的短期和长期性能。设计合理且位置合理的仪器可以帮助收集有关条件，应力和应变，挠度，温度梯度以及随时间变化的特性（例如结构的蠕变和收缩）的有价值的数据。数据可用于验证设计假设，进行修改，改进未来的设计，评估桥梁的总体运行状况以及为桥梁管理系统提供有价值的信息。本文描述了两个公路桥梁的仪器。第一座桥是华盛顿州的三跨连续预应力混凝土工字形桥。这座桥是用高性能混凝土建造的。五个大梁已安装。该仪器旨在评估固化过程中混凝土的内部温度，混凝土的蠕变和收缩，预应力损失，外倾角和挠度。第二座桥梁是夏威夷瓦胡岛的北哈拉瓦山谷高架桥。高架桥超过5500英尺长。对桥的七个部分进行了检测，以很好地表示桥的行为。本文通过确定现场仪器和结构健康监测技术在评估主要桥梁的性能和状况方面的潜在应用来结束。

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