震后桥梁挠度测量方法的设计与实现
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摘要
对震后桥梁稳定性与安全性检测过程中,挠度是一项重要检测指标,但是测量这一参数较为复杂,干扰较多,结果存在较大问题。设计一种震后桥梁挠度测量方法。根据实际桥梁设置相关参数,采用共轭梁法计算震后桥梁固定点的初始挠度,结合震后桥梁挠度曲线函数,获得欲求解的桥梁截面挠度值;修正桥梁截面挠度值时,将监测点高程差同基准点高程差间的差值问题替代挠度偏差问题,分析倾斜传感器获取维护点倾斜传感器的理论值和基准点倾斜传感器的理论值,确定挠度偏差,修正震后桥梁挠度测量值。通过简支梁与连续梁实验,验证测量震后桥梁挠度时,具有更高测量精度。
Deflection is an important index for determining bridge stability and safety after an earthquake, but the measurement of bridge deflection is complex and suffers a lot of interference, so the obtained results are problematic. In this study, we designed a method for measuring bridge deflection after an earthquake. Based on the relevant parameters of an actual bridge, we used the conjugate beam method to calculate the initial deflection of a fixed point on a bridge after earthquake. Combined with the deflection curve function of the post-earthquake bridge, we can determine the deflection of the bridge section. To determine the deflection error of a post-earthquake bridge and correct the measured bridge deflection, we replaced the deflection error problem with the difference between the elevations of the monitored and reference points. Experiments involving simply supported and continuous girders verified the accuracy of the proposed method for measuring the deflection of a bridge post-earthquake.
Deflection is an important index for determining bridge stability and safety after an earthquake, but the measurement of bridge deflection is complex and suffers a lot of interference, so the obtained results are problematic. In this study, we designed a method for measuring bridge deflection after an earthquake. Based on the relevant parameters of an actual bridge, we used the conjugate beam method to calculate the initial deflection of a fixed point on a bridge after earthquake. Combined with the deflection curve function of the post-earthquake bridge, we can determine the deflection of the bridge section. To determine the deflection error of a post-earthquake bridge and correct the measured bridge deflection, we replaced the deflection error problem with the difference between the elevations of the monitored and reference points. Experiments involving simply supported and continuous girders verified the accuracy of the proposed method for measuring the deflection of a bridge post-earthquake.
引文
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[12] 刘志壮,张文昭,薛晓铂,等.基于液体摆的柱面电容式倾角传感器[J].传感技术学报,2018,31(7):48-51.LIU Zhizhuang,ZHANG Wenzhao,XUE Xiaobo,et al.Liquid Pendulum Based Cylindrical Surface Capacitor Tilt Sensor[J].Chinese Journal of Sensors and Actuators,2018,31(7):48-51.
[13] 程辉.重载铁路连续刚构桥梁竖向共振监测分析[J].桥梁建设,2015,45(5):19-23.CHENG Hui.Monitoring and Analysis of Vertical Resonance of a Heavy Haul Railway Continuous Rigid-Frame Bridge[J].Bridge Construction,2015,45(5):19-23.
[2] 胡顺仁,赵宁博,张建科.基于残差分析的挠度传感器故障时间定位算法[J].仪器仪表学报,2016,37(9):2108-2114.HU Shunren,ZHAO Ningbo,ZHANG Jianke.Time Orientation Algorithm of Deflection Sensor Faults Based on Residual Analysis[J].Chinese Journal of Scientific Instrument,2016,37(9):2108-2114.
[3] 王翔,钟继卫,王波,等.桥梁动态挠度图像识别测试技术研究[J].世界桥梁,2015,43(3):59-62.WANG Xiang,ZHONG Jiwei,WANG Bo,et al.Study of Bridge Dynamic Deflection Identification and Testing Technique Based on Image Processing[J].World Bridges,2015,43(3):59-62.
[4] 徐进军,郭鑫伟,廖骅,等.基于地面三维激光扫描的桥梁挠度变形测量[J].大地测量与地球动力学,2017,37(6):609-613.XU Jinjun,GUO Xinwei ,LIAO Hua,et al.The Test on Bridge Deflection Deformation Monitoring by Terrestrial Laser Scanning[J].Journal of Geodesy and Geodynamics,2017,37(6):609-613.
[5] 刘智,张宿峰,蔡曙日,等.大坡度高落差桥梁挠度监测方案试验研究[J].公路交通科技,2015,32(11):88-93.LIU Zhi,ZHANG Sufeng,CAI Shuri,et al.Experimental Study on Deflection Monitoring Scheme of Steep Gradient and High Drop Bridge[J].Journal of Highway and Transportation Research and Development,2015,32(11):88-93.
[6] 周广东,操声浪,刘定坤.基于自适应动态惩罚遗传算法的桥梁监测无线测点优化研究[J].建筑科学与工程学报,2018,35(5):86-92.ZHOU Guangdong,CAO Shenglang,LIU Dingkun.Generalized Genetic Algorithm Integrating Self-adaptive Dynamic Penalty for Optimal Wireless Sensor Placement in Bridge Monitoring[J].Journal of Architecture and Civil Engineering,2018,35(5):86-92.
[7] 彭伟,刘云,张扬,等.微结构光纤表面等离子激元共振传感器的研究[J].应用科学学报,2017,35(4):434-459.PENG Wei,LIU Yun,ZHANG Yang,et al.Investigation of Microstructure Based Fiber Optic Surface Plasmon Resonance Sensor[J].Journal of Applied Sciences,2017,35(4):434-459.
[8] 覃荷瑛,沈全喜,钟英杰.基于光纤光栅传感器的大应变碳纤维板应力监测研究[J].铁道建筑,2018,58(4):53-56.QIN Heying,SHEN Quanxi,ZHONG Yingjie.Research on Stress Monitoring of Large-strain Carbon Fiber Plate Using Fiber Bragg Grating Sensor[J].Railway Engineering,2018,58(4):53-56.
[9] 史露强,何怡刚,罗旗舞,等.基于传感器数据融合的倾斜角度测量方法研究[J].仪器仪表学报,2017,38(7):1683-1689.SHI Luqiang,HE Yigang,LUO Qiwu,et al.Research on the Measurement Method of Tilt Angle Based on Sensor Data Fusion[J].Chinese Journal of Scientific Instrument,2017,38(7):1683-1689.
[10] 郭团,刘甫,邵理阳.倾斜光纤光栅传感器[J].应用科学学报,2018,36(1):75-103.GUO Tuan,LIU Fu,SHAO Liyang.Tilted Fiber Bragg Grating Sensors[J].Journal of Applied Sciences,2018,36(1):75-103.
[11] 赵国栋,耿亚明,柴宇,等.光纤位移传感器在断路器在线监测系统中的应用[J].电力工程技术,2017,36(4):98-102.ZHAO Guodong,GENG Yaming,CHAI Yu,et al.The Applications of the Optical Fiber Displacement Sensor in On-line Monitoring System of Circuit Breaker[J].Jiangsu Electrical Engineering,2017,36(4):98-102.
[12] 刘志壮,张文昭,薛晓铂,等.基于液体摆的柱面电容式倾角传感器[J].传感技术学报,2018,31(7):48-51.LIU Zhizhuang,ZHANG Wenzhao,XUE Xiaobo,et al.Liquid Pendulum Based Cylindrical Surface Capacitor Tilt Sensor[J].Chinese Journal of Sensors and Actuators,2018,31(7):48-51.
[13] 程辉.重载铁路连续刚构桥梁竖向共振监测分析[J].桥梁建设,2015,45(5):19-23.CHENG Hui.Monitoring and Analysis of Vertical Resonance of a Heavy Haul Railway Continuous Rigid-Frame Bridge[J].Bridge Construction,2015,45(5):19-23.