用连续振动阻抗法进行预应力钢筋混凝土梁桥的混合健康监测

提出连续振动阻抗法,对预应力钢筋混凝土桥梁的两种破坏形式(即预应力筋破坏或梁破坏)进行混合健康监测。监测包括3个步骤:第一步,通过监测加速信号的变化,对整体破坏进行预警。第二步,通过振动和阻抗识别模式,将破坏类型分为预应力筋破坏或梁破坏。第三,基于形状模式和频率方法,通过测量试验室中几个预应力筋和梁的加速响应和电子-机械阻抗,对所提系统的可行性进行评估。

Hybrid Health Monitoring of Prestressed Concrete Girder Bridges by Sequential Vibration-Impedance Approaches

A hybrid health monitoring system using sequential vibration-impedance approaches is newly proposed to detect two damage types in prestressed concrete(PSC) girder bridges,which are tendon damage and girder damage.It mainly consists of three sequential steps:global damage warning,damage classification,and damage estimation.In Step 1,a global occurrence of damage is warned by monitoring changes in acceleration features.In Step 2,damage-types are classified into either tendon damage or girder damage by recogni...