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Wireless Monitoring of a Multispan Bridge Superstructure for Diagnostic Load Testing and System Identification

机译：多跨桥上部结构的无线监控，用于诊断负载测试和系统识别

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This article focuses on the deployment of a wireless sensor system (WSS) developed at Clarkson University for structural monitoring purposes. The WSS is designed specifically for diagnostic bridge monitoring, providing independent conditioning for accelerom-eters, strain transducers, and temperature sensors in addition to high-rate wireless data transmission and is capable of supporting large-scale sensor arrays. A three-span simply supported structure was subjected to diagnostic load testing as well as ambient vibration monitoring. A total of 90 wireless and several wired sensors, including accelerometers and strain transducers were used in the deployment. Strain measurements provided capacity and demand characteristics of the structure in the form of neutral axis locations, load distributions, and dynamic allowances which ultimately produced an inventory and operating load rating for the structure. Additionally, modal characteristics of the structure, including natural frequencies and mode shapes, were derived from measured accelerations and discussed briefly.
机译：本文重点介绍在克拉克森大学开发的用于结构监视目的的无线传感器系统（WSS）的部署。 WSS专为诊断桥监控而设计，除提供高速无线数据传输外，还为加速器，应变传感器和温度传感器提供独立的条件，并能够支持大型传感器阵列。对三跨简单支撑结构进行了诊断负载测试以及环境振动监测。部署中总共使用了90个无线传感器和几个有线传感器，包括加速度计和应变传感器。应变测量以中性轴位置，载荷分布和动态余量的形式提供了结构的承载能力和需求特征，最终产生了该结构的清单和运行额定载荷。此外，结构的模态特征（包括固有频率和模态形状）是从测得的加速度得出的，并进行了简要讨论。

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    Michael V. Gangone; Matthew J. Whelan; Kerop D. Janoyan;

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    Graduate Research Assistant, Civil and Environmental Engineering, Clarkson University, 8 Clarkson Avenue Box 5712,Potsdam, NY 13699, USA;

    Assistant Professor, Department of Civil and Environmental Engineering, University of North Carolina at Charlotte,9201 University City Boulevard, Charlotte, NC 28223, USA;

    Associate Professor, Civil and Environmental Engineering, Clarkson University, 8 Clarkson Avenue Box 5710, Potsdam,NY 13699, USA;

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