大跨度桥梁变形三维激光扫描结果与有限元模拟对比分析
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摘要
传统的桥梁变形监测方法只能把握数个独立点的观测形变数据,不能全面控制大跨度桥梁各部分的变形数据。现提出将车载三维激光扫描技术用于桥面几何形态数据采集的方法,将其应用于结构物的三维重建工作中,直接对结构物表面进行三维测量,采用三维阵列点云的方式来生成结构物表面的三维形态并记录点位坐标,打破了传统的桥梁变形监测方法仅有数个独立点的局限性,扩大了桥面变形监测范围,提高了结构物的观测精度,并能快速、完整地进行量测。采用有限元分析软件MIDAS CIVIL对该特大桥主桥进行建模,得到各温差下结构的理论变形数据,与车载三维激光扫描得到的实际测量结果进行对比,发现实测值具有较高的精度和可靠性。车载三维激光扫描技术可得到桥梁点-线-面的整体变形监测结果,相较传统的桥面变形监测而言,该方法则侧重结构整体变形特征,并消除了在测量过程中对交通运营的不利性,有较好的工程应用前景。
A geometrical data acquisition method is proposed to monitoring bridge deck with Mobile Laser Scanning equipment( MLS). The general bridge deformation monitoring based on contactingsensors fails in extracting full-span bridge deformation due to the number limit of the sensors. We applied Mobile Laser Scanning technology to bridge three-dimensional reconstruction. The three-dimensional model can be accurately and directly generated through the three-dimensional array points cloud with the point coordinates recording after the structure is fully and detailedly scanned. Our research is background on large-span steel truss upper-bearing arch bridge. We conduct repetitive geometrical data acquisition to get temperature deformation. Two types of temperature deformation are obtained from actual measurement with MLS and theoretical calculation by MIDAS CIVIL. Two kinds of outcome agree with each other well,which verified the proposed geometrical data acquisition method. With its own advantage such as free of traffic-interference and entirety of measurement, wild application of the new method can been look forward.
A geometrical data acquisition method is proposed to monitoring bridge deck with Mobile Laser Scanning equipment( MLS). The general bridge deformation monitoring based on contactingsensors fails in extracting full-span bridge deformation due to the number limit of the sensors. We applied Mobile Laser Scanning technology to bridge three-dimensional reconstruction. The three-dimensional model can be accurately and directly generated through the three-dimensional array points cloud with the point coordinates recording after the structure is fully and detailedly scanned. Our research is background on large-span steel truss upper-bearing arch bridge. We conduct repetitive geometrical data acquisition to get temperature deformation. Two types of temperature deformation are obtained from actual measurement with MLS and theoretical calculation by MIDAS CIVIL. Two kinds of outcome agree with each other well,which verified the proposed geometrical data acquisition method. With its own advantage such as free of traffic-interference and entirety of measurement, wild application of the new method can been look forward.
引文
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[3]栾元重,栾亨宣,李伟,等.桥梁变形监测数据小波去噪与Kalman滤波研究[J].大地测量与地球动力学,2015,35(06):1041-1045.
[4] Soni A,Robson S,Gleeson B. Structural monitoring for the rail industry using conventional survey,laser scanning and photogrammetry[J]. Applied Geomatics,2015,7(2):123-138.
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[6] Chen M G,Chen C S,Wu C T,et al. Monitoring of Sag Deformation in Suspension Bridges Using a 3D Laser Scanner[J]. Circulation Research,2010,115(5):475.
[7]王震,陈仕刚,刘亚军.应用Midas进行桥梁加固承载力的分析[J].四川建筑科学研究,2015(02).
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[9]王红霞.三维激光扫描技术在桥梁监测中的应用[D].兰州:兰州理工大学,2012.
[10]吴向男,徐岳,梁鹏.桥梁结构损伤识别研究现状与展望[J].长安大学学报(自然科学版),2013,33(6):49-58.
[11]谢雄耀,卢晓智,田海洋,等.基于地面三维激光扫描技术的隧道全断面变形测量方法[J].岩石力学与工程学报,2013,32(11):2214-2224.
[12]臧伟,钱林,孙宝军,等.地面三维激光扫描技术在工程测量中的应用[J].北京测绘,2015(3):130-135.
[13] Bergstr? m P. Evaluation of NURBS Surfaces for Regular Structured Parameter Values[J]. Journal of Computing&Information Science in Engineering,2016,15(1):011005.
[14]陈弘奕,胡晓斌,李崇瑞.地面三维激光扫描技术在变形监测中的应用[J].测绘通报,2014(12):74-77.
[15]吕翠华,陈秀萍,张东明.基于三维激光扫描技术的建筑物三维建模方法[J].科学技术与工程. 2012(10):2410-2414.
[16] Fleishman S,Cohen-Or D,Alexa M,et al. Progressive point set surfaces[J]. ACM Transactions on Graphics,2003,22(4):997-1011.
[17] Rudolf STAIGER. Terrestrial Laser Scanning Technology,Systems and Applications[C]. 2nd FIG Regional Conference. Marrakech,Morocco,December 2-5,2003.
[18]陈辉,袁海庆,李胜,等.温度作用对钢筒仓结构影响的有限元分析[J].四川建筑科学研究. 2006(06).
[2]袁万城,崔飞,张启伟.桥梁健康监测与状态评估的研究现状与发展[J].同济大学学报,1999,27(02):184-188.
[3]栾元重,栾亨宣,李伟,等.桥梁变形监测数据小波去噪与Kalman滤波研究[J].大地测量与地球动力学,2015,35(06):1041-1045.
[4] Soni A,Robson S,Gleeson B. Structural monitoring for the rail industry using conventional survey,laser scanning and photogrammetry[J]. Applied Geomatics,2015,7(2):123-138.
[5] Riveiro B,Morer P,Arias P,et al. Terrestrial laser scanning and limit analysis of masonry arch bridges[J]. Construction&Building Materials,2011,25(4):1726-1735.
[6] Chen M G,Chen C S,Wu C T,et al. Monitoring of Sag Deformation in Suspension Bridges Using a 3D Laser Scanner[J]. Circulation Research,2010,115(5):475.
[7]王震,陈仕刚,刘亚军.应用Midas进行桥梁加固承载力的分析[J].四川建筑科学研究,2015(02).
[8] Nassar S. Improving the Inertial Navigation System(INS)Error Model for INS and INS/DGPS Applications(Doctorate Dissertation)[D]. Calgary:University of Calgary,2003.
[9]王红霞.三维激光扫描技术在桥梁监测中的应用[D].兰州:兰州理工大学,2012.
[10]吴向男,徐岳,梁鹏.桥梁结构损伤识别研究现状与展望[J].长安大学学报(自然科学版),2013,33(6):49-58.
[11]谢雄耀,卢晓智,田海洋,等.基于地面三维激光扫描技术的隧道全断面变形测量方法[J].岩石力学与工程学报,2013,32(11):2214-2224.
[12]臧伟,钱林,孙宝军,等.地面三维激光扫描技术在工程测量中的应用[J].北京测绘,2015(3):130-135.
[13] Bergstr? m P. Evaluation of NURBS Surfaces for Regular Structured Parameter Values[J]. Journal of Computing&Information Science in Engineering,2016,15(1):011005.
[14]陈弘奕,胡晓斌,李崇瑞.地面三维激光扫描技术在变形监测中的应用[J].测绘通报,2014(12):74-77.
[15]吕翠华,陈秀萍,张东明.基于三维激光扫描技术的建筑物三维建模方法[J].科学技术与工程. 2012(10):2410-2414.
[16] Fleishman S,Cohen-Or D,Alexa M,et al. Progressive point set surfaces[J]. ACM Transactions on Graphics,2003,22(4):997-1011.
[17] Rudolf STAIGER. Terrestrial Laser Scanning Technology,Systems and Applications[C]. 2nd FIG Regional Conference. Marrakech,Morocco,December 2-5,2003.
[18]陈辉,袁海庆,李胜,等.温度作用对钢筒仓结构影响的有限元分析[J].四川建筑科学研究. 2006(06).