Development of the maintenance management technology of the bridges by intelligent and utilization of smart monitoring

1. 在实际桥梁中布置了2个叠层压电弹性致动器和6个加速度传感器，并制作桥梁构件产生螺栓松动。进行了损伤位置和损伤程度的检测实验，验证了微小怪的形状是可检测的。为了测量焊接缺陷的存在，建立了高精度激光位移系统。为T型钢梁焊接缺陷的检测提供了理论依据。采用关注功率谱密度或相位角变化的分析方法识别损伤位置，并将实验结果与分析结果进行对比检验，验证了分析方法的准确性。从伊利诺伊大学回国的研究团队Yasunori Miyamori助理教授利用网络建立了虚拟空间的临时动态实验系统和无线局域网，进行了信息交换和研究收集。验证了无线电遥控测量系统的实用性。将无线局域网测斜仪应用于某桥梁的振动试验。实用性也得到了检验。通过无线局域网对加速度计的测量结果与电缆布线加速度计的测量结果进行了比较，并对其实用性进行了检验。结果表明，基于无线局域网的加速度测量系统存在多点测量数据同步和数据丢失的问题。对桥梁维修管理所需的RC板退化预测方法进行了研究。

1. Two lamination piezo-elastic actuators and six acceleration sensors have been arranged in actual bridge, and the member of bridge was made to generate looseness of the bolts. The experiment which detects a damage position and its damage extent was conducted, and it verified that the shape of minute strange was detectable.2. The high precision laser displacement system was built for the purpose of measuring the existence of a welding defect. Consequently, detection of the welding defect of a T type steel girder was proved.3. The damage position was identified using the analysis approach which paid its attention to power-spectrum density or phase-angle change, comparison examination of an experimental result and an analysis result was performed, and the accuracy of the analysis approach was checked.4. Information exchange and collection of researches, such as remote monitoring using the temporary dynamic experiment system and wireless LAN which are built to the virtual space using a network from Assistant professor Yasunori Miyamori, the research consortium who went back from University of Illinois, were performed.5. It verified about the practicality of a radio system remote control measurement system.6. The inclinometer by wireless LAN was applied to the vibration test of a bridge. And practicality was checked.7. The measurement result of the accelerometer by wireless LAN and the accelerometer which carried out cable wiring was compared, and practicality was examined. As a result, it turned out that the acceleration measurement system by wireless LAN has the problem which the synchronous method of multi-point measurement data and data loss generate.8. Examination about the degradation prediction approach of the RC slab which is needed for the maintenance management of a bridge was performed.