Design of smart composite material system for civil infrastructure retrofit

建议进行一项调查，以开发一种创新的内置诊断技术，以便在重大地震事件后或例行维护后对复合改造/修复的民用基础设施进行可靠和快速的初步评估。智能复合系统的主要组成部分包括用于结构加固的复合材料和用于评估改造完整性的诊断传感系统。该诊断传感系统由薄的诊断传感器薄膜、用于信号产生和处理的外部硬件以及用于信号解释的诊断软件组成。为了在大地震或常规检查后评估改造的完整性，预先确定的诊断信号将从薄膜内建的压电致动器自动生成到邻近的光纤传感器。诊断软件将传感器测量值与健康状态下的基线参考值进行比较，以快速可靠地确定三个可能级别的结构完整性状态：绿色-无损坏并继续使用，黄色-轻微损坏并谨慎继续使用，红色-严重损坏并立即修复。研究完成后，我们会开发建议系统的原型。随后将进行实地实施和测试，以进一步验证智能系统的效率和可靠性。该项目将与日本智能结构研究中心和加州交通部合作进行

An investigation is proposed to develop an innovative built-in diagnostic technique for a reliable and quick initial assessment of composite retrofitted/rehabilitated civil infrastructure upon inspection after a major seismic event or at a routine maintenance. The major components of the smart composite system consist of composite materials for structural reinforcement and a diagnostic sensing system for assessing the integrity of the retrofit. The diagnostic sensing system is made of thin diagnostic sensor films, external hardware far signal generation and processing, and diagnostic software for signal interpretation.To assess the integrity of the retrofit after a major earthquake or at routine inspections, pre-determined diagnostic signals will be generated automatically from piezo-actuators built in the film to neighboring optical fiber sensors. Diagnostic software will compare sensor measurement with a baseline reference taken at a healthy condition to determine quickly and reliably the status of the integrity of the structures in three possible levels: Green-no damage and continuing usage, Yellow-minor damage and continuing usage with caution, and Red-severe damage and no usage with immediate repair. Upon completion of the study, a prototype of the proposed system will developed. Field implementation and tests will be followed to further verify the efficiency and reliability of the smart systems. This project will be conducted in collaboration with the Smart Structure Research Center of Japan and the California Department of Transportation