桥梁健康监测技术的适用性

为了掌握桥梁在各种工作环境下的结构行为和状态,并利用监测信息及早发现桥梁的异常或损伤,在总结了多座斜拉桥病害特点的基础上,以1座典型斜拉桥的有限元模型模拟了多种可能的损伤情形,并通过计算得到各种损伤情况下的结构动、静力反应及其变化。通过对损伤引起的结构变化和现代监测技术的工作性能及环境对结构行为影响的比较,调查典型桥梁健康监测方法的适用性。结果表明:以目前的监测手段获得的数据难以用来实现桥梁的损伤预警。

Applicability of Bridge Health Monitoring Technology

In order to investigate the structural behavior and status of bridges in various working conditions,and to know the abnormality or damage of bridges by using detection information,a finite element model of a classical cable-stayed bridge was used to simulate the possible damage scenarios.The changes in the static deformation and stress distribution as well as the dynamic characteristics of the bridge model due to damage were analyzed.By the comparison of the damage-caused structural changes working behavior of modern monitoring techniques and the influence of environment on structure,the applicability of typical bridge health monitoring system was revealed.Results show that using datum acquired with current monitoring techniques can hardly realize alarming of bridge damage.