Typical earthquake damage extraction and three-dimensional modeling analysis based on terrestrial laser scanning: A case study of Bailu middle school of Pengzhou city

doi:10.6046/gtzyyg.2016.01.24

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Abstract

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 205cm and 231cm respectively. This was consistent with the GPS measurements.

Keywords road intersection autoextraction high resolution remote sensing image mathematical morphology multi-scale angular texture signature valley finding

TP79

Issue Date: 27 November 2015

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	CAI Hongyue
	YAO Guoqing

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CAI Hongyue,YAO Guoqing. Typical earthquake damage extraction and three-dimensional modeling analysis based on terrestrial laser scanning: A case study of Bailu middle school of Pengzhou city[J]. REMOTE SENSING FOR LAND & RESOURCES, 2016, 28(1): 166-171.

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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2016.01.24 OR https://www.gtzyyg.com/EN/Y2016/V28/I1/166

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