Development of bridge maintenance technique by intelligent system and practical use of smart monitoring

(1)为了利用能连续扫频振动的压电致动器检测结构缺陷，研制了螺栓松动和钢结构构件焊接缺陷检测系统。在桥端安装了测斜仪，并开发了可进行远程控制的挠度角监测系统。(3)对北海道东海道的萨祖奈大桥进行了远程控制振动监测。并与2003年东京近海地震的破坏情况进行了比较。(4)研究了腐蚀传感器等可对桥梁进行智能化监测的系统。(5)对桥梁完整性评估系统BMS(Bridge Management System)或桥梁健康指标的影响因素进行了考察。

(1)In order to detect a structure defect using the piezoelectric actuator which can carry out sweep vibration continuously, the system which can detect looseness of a bolt part and the welding defect of a steel structural element was developed. Furthermore, it was shown that detection of very small damage, a cross-sectional deficit, etc. can do this system.(2)The inclinometer was installed on the bridge end and the system which can carry out the monitoring of the angle of deflection in remote control was developed.(3)Remote control vibration monitoring was started operation about Satsunai Seiryu Ohashi, Tokachi Hokkaido. And it compared with damage of the Tokachi offshore earthquake in 2003. The construction of a system which performs the continuous monitoring for two years and can carry out structure monitoring at the time of the occurrence of an earthquake was developed, and data is acquired continuously.(4)The system which can carry out the intelligent monitoring of the bridges, such as a corrosion sensor, was examined.(5)Examination of the influence factor on the bridge integrity evaluation system BMS (Bridge Management System) or the bridge health index was performed.