

Modal Identification of Steel Truss Bridges Using Wireless Sensor Network
Abstract
Concerns regarding the functionality of existing infrastructure have motivated researchers to pursue efficient ways of structural health monitoring. Application of wireless sensor network (WSN) in health monitoring of infrastructure has presented exciting potentials in this area over the past few years. Using a WSN as a cost-efficient and easy to install tool, measurement of the dynamic response of infrastructure has become more convenient. Integrating the dynamic test of in-service bridge structures into their health monitoring provides considerable information about their global behavior which can help with their maintenance and management. A critical step toward the broad application of WSN in monitoring of infrastructure is their experimental validation. In this paper the deployment of wireless sensor networks (WSNs) on two different steel bridge structures is discussed. The responses of these bridges under their daily traffic and other ambient loads are measured and used for structural identification and evaluation of the bridge.