A laser scanning-based method for fast estimation of seismic-induced building deformations

Abstract Monitoring damaged buildings in an area where an earthquake has occurred requires the use of techniques which provide rapid and safe measurements even in emergency conditions. In particular, remote sensing techniques like terrestrial laser scanning (TLS) can satisfy these requirements, since they produce very dense point clouds in little time and also allow an accurate geometric modeling of observed buildings. Nevertheless, strong constraints on TLS data acquisition geometry, such as acquisition distance and incidence angles, typically characterize an area in seismic emergency conditions. In order to correctly interpret the data, it is necessary to estimate errors affecting TLS measurements in these critical conditions. A reliable estimation can be achieved by means of experiments and numerical simulations aimed at quantifying a realistic noise level, with emphasis on reduction of artifacts due to data acquisition, registration and modeling. This paper proposes a data analysis strategy in which TLS-based morphological maps computed as point-to-primitive differences are created. The method can be easily used for accurate surveying in emergency conditions. In order to demonstrate the proposed method in very diverse situations, it was applied to rapidly detect deformation traces in the San Giacomo Roncole Campanile (Modena), the Asinelli tower (Bologna) and the Cantalovo Church (Verona), three buildings damaged by the Mw 5.9 Emilia Romagna 2012 earthquake (Italy).

[1]  N. Yastikli Documentation of cultural heritage using digital photogrammetry and laser scanning , 2007 .

[2]  Maurice Murphy,et al.  Historic Building Information Modelling (HBIM) , 2019, Architecture and Design.

[3]  P. Arias,et al.  Historic bridge modelling using laser scanning, ground penetrating radar and finite element methods in the context of structural dynamics , 2009 .

[4]  Anttoni Jaakkola,et al.  Analysis of Incidence Angle and Distance Effects on Terrestrial Laser Scanner Intensity: Search for Correction Methods , 2011, Remote. Sens..

[5]  Giordano Teza,et al.  Effects of surface irregularities on intensity data from laser scanning: an experimental approach , 2008 .

[6]  Michael Forde,et al.  Application of infrared thermography to the non-destructive testing of concrete and masonry bridges , 2003 .

[7]  Enzo Boschi,et al.  I terremoti a Bologna e nel suo territorio dal XII al XX secolo , 2003 .

[8]  Giordano Teza,et al.  Terrestrial Laser Scanner Resolution: Numerical Simulations and Experiments on Spatial Sampling Optimization , 2011, Remote. Sens..

[9]  Carlo Atzeni,et al.  Integration of Radar Interferometry and Laser Scanning for Remote Monitoring of an Urban Site Built on a Sliding Slope , 2006, IEEE Transactions on Geoscience and Remote Sensing.

[10]  Enzo Boschi,et al.  Laser scanning the Garisenda and Asinelli towers in Bologna (Italy): Detailed deformation patterns of two ancient leaning buildings , 2011 .

[11]  Luc Schueremans,et al.  TERRESTRIAL LASER SCANNING IN ARCHITECTURAL HERITAGE – DEFORMATION ANALYSIS AND THE AUTOMATIC GENERATION OF 2D CROSS-SECTIONS , 2009 .

[12]  Carlo Atzeni,et al.  Dynamic Monitoring of Bridges Using a High-Speed Coherent Radar , 2006, IEEE Transactions on Geoscience and Remote Sensing.

[13]  A. Emin Aktan,et al.  Use of Modal Flexibility for Damage Detection and Condition Assessment: Case Studies and Demonstrations on Large Structures , 2006 .

[14]  Diego González-Aguilera,et al.  Terrestrial laser scanning intensity data applied to damage detection for historical buildings , 2010 .

[15]  Mª Amparo Núñez Andrés,et al.  Evolution of the architectural and heritage representation , 2009 .

[16]  Luigia Binda,et al.  Experimental and numerical study on the application of the flat jack tests to masonry walls , 2008 .

[17]  Stefano Girardi,et al.  Discrimination between marls and limestones using intensity data from terrestrial laser scanner , 2009 .

[18]  Carmelo Gentile,et al.  Ambient vibration testing of historic masonry towers for structural identification and damage assessment , 2007 .