ABSTRACT
Development of on-site health monitoring system is in great demand for proper maintenance of concrete structures under severe chloride attack. Research Association for Infrastructure Monitoring System (RAIMS) has been engaged in establishment of the health monitoring system in bridges in service. Thus, many experiments on concrete bridges under severe environments are extensively conducted. As a preliminary research on an applicability of the health monitoring system to early detection of chloride penetration and rebar corrosion, on-site sensing devices have been applied to a prestressed concrete (PC) bridge. Three kinds of sensors are placed and monitoring has been continuously conducted for more than two years. Further a simple device for easy monitoring is applied to another bridge in service. All the results are comprehensively discussed.
