DEVELOPMENT OF INTELLIGENT SENSING AND SMART MONITORING TECHNIQUE FOR SEISMIC SAFETY OF BRIDGE

桥梁抗震安全智能传感与智能监测技术开发

• 批准号: 13650516
• 负责人: OSHIMA Toshiyuki
• 金额: $ 2.18万
• 依托单位: KITAMI INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650516/
• 关键词: bridge maintenance management; structural integrity monitoring; seismic safety; intelligent sensing; 構造健全度モニタリング; 構造ヘルスモニタリング

In order to make bridge structure intelligent, while having arranged the optical fiber sensor (FBG) and the strain gage inside structure, the sensor that can measure displacement and acceleration on a bridge has been arranged, and it was proved that data could be acquired by wireless remote control.A base-isolated bridge may carry out the design that forms a long cycle and suppresses action of seismic force.If superstructure movement of a bridge exceeds a laying gap between structure and abutment in case of a big earthquake, it will collide with a parapet wall. When structure does not have falling prevention system of bridge, falling is inevitable. In order to secure seismic safety, examination of the shock absorbing material in a bridge end and the real bridge design which has arranged perfect quake-absorbing LRB (the seismic isolation bearing containing a lead plug, Lead Rubber Bearing) for two directions on the continuous curvilinear bridge were done, and the good result was obtained.In order to prove the health monitoring of the bridge using a GPS sensor, the GPS sensor was installed on the sidewalk suspension bridge and the continuous girder bridge, and the influence of measurement accuracy by an obstacle etc. was verified.The defect detection system of bridge structure using a piezoelectric actuator was developed. Local vibration of the structure can be introduced by the piezoelectric actuator, the acceleration response can be measured. A structural defect can be detected from change of an oscillating response, and it can apply to the monitoring of structure health.The monitoring technology by remote control was developed for the bridge inspection support system which utilized the mobile terminal.

为了使桥梁结构智能化，在结构内部布置光纤传感器（FBG）和应变片的同时，还布置了能测量桥梁位移和加速度的传感器，并通过无线遥控进行了数据采集。基础隔震桥可以进行形成长周期、抑制地震力作用的设计。在大地震时，如果桥梁上部结构的移动超过结构与桥台之间的铺设间隙，就会与护墙发生碰撞。当结构不具备桥梁防坠系统时，垮塌是不可避免的。为保证地震安全，对桥端减震材料进行了校核，并在连续曲线桥上布置了两个方向的完美减震LRB（含铅塞隔震支座，铅橡胶支座）的实际桥梁设计，取得了良好的效果。为了验证GPS传感器对桥梁健康监测的有效性，将GPS传感器安装在人行悬索桥和连续梁桥上，验证障碍物等因素对测量精度的影响。研制了基于压电致动器的桥梁结构缺陷检测系统。压电驱动器可以引入结构的局部振动，测量结构的加速度响应。该方法可以通过振动响应的变化来检测结构缺陷，并应用于结构健康监测。开发了基于移动终端的桥梁检测支撑系统远程监控技术。

项目成果

T.Oshima, et al.: "Application of Intelligent Monitoring System to Bridge Health Diagnosis"Structural Health Monitoring Workshop, ISIS2002. 309-317 (2002)

T.Oshima 等：“应用智能监测系统桥接健康诊断”结构健康监测研讨会，ISIS2002。

大島俊之: "橋梁健全度評価に用いる評価方法の検討と影響要因の解析"土木学会論文集. No.675/I-55. 201-217 (2001)

Toshiyuki Oshima：“用于桥梁健全性评估的评估方法的研究和影响因素分析”，日本土木工程师学会学报第 675/I-55 号（2001 年）。

大島俊之: "橋梁各部材の資産的評価と橋梁健全度指数の解析"土木学会論文集. No.703/I-59. 53-65 (2002)

Toshiyuki Oshima：“桥梁各构件的资产评估和桥梁健康指数分析”日本土木工程师学会汇刊第 703/I-59（2002 年）。

T. Oshima, etc.: "Application of Intelligent Monitoring System to Bridge Health Diagnosis"Structural Health Monitoring Workshop. ISIS2002. 309-317 (2002)

T. Oshima等：“应用智能监测系统桥接健康诊断”结构健康监测研讨会。

大島俊之他: "局部振動による鋼材接合部の損傷評価に関する研究"応用力学論文集. 5. 837-846 (2002)

Toshiyuki Oshima 等：“局部振动引起的钢接头损伤评估研究”应用力学杂志 5. 837-846 (2002)。