大跨度连续钢桁梁振动远程监测系统建立研究

首先阐述了振动监测在桥梁结构监测中的重要意义,并以某大跨度连续钢桁梁为工程实例,采用ANSYS有限元软件建立了有限元模型,并对其进行了详细的结构分析和传感器优化布置,对振动远程监测系统的监测内容、测点布置、传感器及二次仪表的选型、信号分析处理方法等内容进行了深入研究,设计了实时触发采集和周期性采集相结合的信号采集方式,...

On the Remote Monitoring System for the Vibration of Large-Span Continuous Steel Truss Bridges

The importance of vibration monitoring in monitoring the health of bridge structures is first briefly introduced in the paper.With a certain large-span steel truss bridge as a practical example,a finite element model is established with the help of the software of ANSYS,of which a detailed structural analysis is made,and for which the layout of sensors is optimized.A deep study is also made of the vibration monitoring subsystem,which includes the monitoring content,the layout of measuring points,transducers,amplifiers and methods of signal analysis and processing etc.,with a new acquisition mode designed,which includes both the real-time trigger acquisition,and the cyclical acquisition.A set of software,based on the advanced software platform-LabVIEW,which can realize the remote data acquisition,reception,analysis,real-time display,alarm and data save is developed,upon the basis of which a set of perfect vibration remote monitoring and state evaluation system is finally established,which realizes the monitoring of the structural responses and working conditions in real time,and can analyze the structural working state by means of the information obtained from the measured data and assess the reliability of large bridges.It may also provide the scientific grounds for the decision-making on the management and maintenance of bridges.