大型桥梁健康监测概念与监测系统设计

Conception of Long-span Bridge Health Monitoring and Monitoring System Design

大型桥梁健康监测力求对结构整体行为的实时监控和对结构状态的智能化评估 ,同时 ,对大跨度桥梁设计理论与力学模型的验证以及对结构和结构环境中未知或不确定性问题的调查与研究也正融入桥梁健康监测的内涵 .据此首先简要地总结 10多年来桥梁健康监测的研究状况 ,然后较系统地阐述桥梁结构健康监测的新概念 ,并从桥梁工程发展的角度探讨大型桥梁监测系统设计的有关问题 。

A primary objective of long-span bridge health monitoring is to obtain the information on bridge condition through online monitoring of the structural performance.Also,health monitoring helps to verify the design approaches and to validate the analytical models of bridge structures.In addition,the unknown issues and the uncertainties involved in the structural mechanics and the environmental condition of a long span bridge may be studied through health monitoring.In this paper,after a brief overview of the development of bridge health monitoring,the connotation of bridge health monitoring is pointed out in an extended sense.Related issues on the design of monitoring system,including the principles of system design and the monitoring items for long span bridges are discussed.