本征自感知混凝土在高铁土建基础设施原位监测中的应用展望  

Prospects on Applications of Intrinsic Self-sensing Concrete in Infrastructures In-situ Monitoring for High Speed Railway Civil Engineering

作　　者：韩宝国[1] 丁思齐 董素芬[1] 倪一清[2] 欧进萍[1] HAN Baoguo;DING Siqi;DONG Sufen;NI Yiqing;OU Jinping(Dalian University of Technology,Dalian 116024,China;The Hong Kong Polytechnic University,Hong Kong,China)

机构地区：[1]大连理工大学,辽宁大连116024 [2]香港理工大学,中国香港

出　　处：《中国铁路》2019年第11期68-76,共9页China Railway

基　　金：国家自然科学基金项目（51901803、51578110）;中央高校基本科研业务费专项资金项目（DUT18GJ203）

摘　　要：本征自感知混凝土作为一种结构材料,具有感知自身的能力而无需布设额外的传感器。通过测试本征自感知混凝土电阻的变化,可实时监测其应力、应变和损伤。与已有传感器相比,本征自感知混凝土具有灵敏度高、力学性能好、与结构具有等同的服役寿命,以及易布设、易维护等优点。本征自感知混凝土集优异的结构和传感功能于一体,有望对具有造价高、服役长、分布广、荷载和环境作用复杂等特点的高铁土建基础设施实现原位监测,从而为保障高铁土建基础设施运营的安全性和交通运输的顺畅性提供新途径。Intrinsic self-sensing concrete(ISSC)refers to a structural material that can monitor itself without the need of embedded,attached or remote sensors.By measuring electrical resistance of the ISSC,the stress,strain and damage can be in-situ monitored simultaneously.Compared with the conventional structural materials which require additional sensors for monitoring or detection,the ISSC has advantages in its high sensitivity,good mechanical property,natural compatibility,identical lifespan with concrete,easy installation and maintenance.Owing to its excellent combination of mechanical and sensing functions,ISSC is expected to provide a new approach for in-situ monitoring of HSR civil engineering infrastructure that possess high cost,long service life as well as wide distribution and experience complex loading and environmental actions,thus guaranteeing the operation safety of HSR civil engineering infrastructure and the smooth traffic flow.

关 键 词：高速铁路 土建基础设施 本征自感知混凝土 智能材料 原位监测 结构监测 

分 类 号：U21[交通运输工程—道路与铁道工程] TU528[建筑科学—建筑技术科学]