In-service Vibration Monitoring of a Tall Building Structure using Wireless Sensor Networks

摘要

Advancements in sensing and data acquisition technology have made monitoring of infrastructure more affordable and at the same time more comprehensive. Examples of such advancements are application of wireless technology for communication, automated systems for long-term monitoring, and remote control of the sensing networks. These advancements have assisted in alleviating many challenges in application of traditional structural health monitoring (SHM) systems. As a result, with minimal efforts, reliability of existing structures can be achieved through measurement and assessment of the structure's response. This paper presents application of combined wired and wireless sensor networks, which benefits from advantages of both systems, in performance evaluation of an in-service 16-story building structure that is suffering from perceptible vibration in different directions and different locations. Broad range of structural responses including acceleration, displacement, strain, wind speed and wind direction are measured/recorded in this work, and the dynamic behaviour of the structure is investigated. This investigation includes identification of the vibration propagation in the building (its path and attenuation trend) along with development of the finite element model of the building structure for prediction of the structure's response at different locations. The obtained information in this study is used to evaluate potential mitigation strategies for maintenance and serviceability of the building in its future operation.