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论文类型：会议论文

发表时间：2013-12-09

收录刊物：EI、Scopus

页面范围：36-53

摘要：Life-cycle performance evaluation is the basis of the life-cycle management of a civil structure. Structural health monitoring (SHM) is an in situ test technique used to evaluate the life-cycle performance of a civil structure. Unlike small-scale laboratory tests, SHM can provide comprehensive insight into the real spatial behaviors and performance of real full-scale civil structures under real actions on a real-time scale throughout the operational life. The large amount of civil infrastructure construction provides an opportunity to develop the SHM technique in mainland China. A number of sophisticated SHM systems have been implemented in civil structures in mainland China. Novel scientific research has been conducted based on monitoring data, while practical experience has revealed several challenges when implementing SHM. This paper first introduces two representative SHM systems for full-scale bridges. The framework of SHM and SHM-based life-cycle performance evaluation and control are then defined. Novel data acquisition, transmission and management techniques are proposed, which include the compressive sampling (CS)-based data acquisition technique for the reduction of mega data in SHM and the CS-based recovery approach for data loss in wireless sensor networks. Furthermore, the modeling approaches of monitored loads, environmental actions and their combination, as well as the response of the structure, are presented, including extreme value distribution and the accumulative fatigue damage model. The performance degradation models of some key structural elements were obtained by considering corrosion and fatigue-coupled effects. A time-variant safety evaluation was also conducted. Additionally, two disaster actions, SHM applications in wind engineering and earthquake engineering, are also described in this paper. Finally, the challenges in the SHM field are discussed.