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《Remote Sensing for Land & Resources》 2016-01
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Typical earthquake damage extraction and three- dimensional modeling analysis based on terrestrial laser scanning: A case study of Bailu middle school of Pengzhou city

JIAO Qisong;ZHANG Jingfa;JIANG Hongbo;SU Yuanyuan;WANG Xu;Institute of Engineering Mechanics,CEA;Institute of Crustal Dynamics,CEA;  
Traditional optical and Radar remote sensing technology fails to acquire the building facade damage in the case of earthquake damage assessment. The capability of identifying the buildings whose structure has been destroyed and whose roof top is basically complete is poor. This reduces the assessment accuracy. However,terrestrial laser scanning could acquire the high precision 3D information of the damaged structure. Using RIEGL VZ- 1000 laser scanner,the authors collected laser point clouds data of Bailu middle school on October 23,2013.The point clouds were used to conduct 3D modeling and analysis through triangular irregular network modeling and texture mapping. On such a basis,a detailed modeling study was carried out on the typical architectural damage characteristics and surface rupture destruction. The authors achieved damaged buildings surface observation at any angle and quantitative measurement of the surface rupture through point clouds 3D modeling. The results truly reproduced the current scene of Bailu middle school after earthquake and permanently preserved the damage information. The results showed that the Qinxue building located on the hanging wall had no significant damage,whereas the Qiuzhi building located on the heading wall was seriously damaged. "X"- shaped conjugate shear fracture,structural column fracture,rebar exposure and other phenomena were widespread. The earthquake scarp settlement was small and the scarp elevation profile showed that the minimum and maximum height was 205 cm and231cm respectively. This was consistent with the GPS measurements.
【Fund】: 中央级公益性科研院所基本科研业务专项(编号:J2213802);; 国家高技术研究发展计划(编号:2012AA121304)共同资助
【CateGory Index】: TU198
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