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Methodology for diagnosing crack patterns in masonry structures using photogrammetry and distinct element modeling
摘要： Understanding the causes of damages on existing structures can augment preservation, renovation, and rehabilitation efforts. The aim of this work is to outline a method for diagnosing the most probable causes of cracks on existing structures using a combination of photogrammetry and distinct element modeling (DEM). Five experimental, masonry walls were constructed and cracked; the state of the wall before and after cracking was recorded using photogrammetry. Using distinct element modeling, each test wall was subjected to a variety of loading conditions including the same load case which was used to crack the wall during experimental testing. The crack patterns in the simulations were compared to the experimental crack patterns using a combined qualitative and quantitative method. The simulation which most closely reflected the existing damage patterns was selected as the most probable cause of the damages. For each of the test walls, the real simulated load had the closest fractional distance to the existing damage patterns captured by photogrammetry. This method was then applied to diagnose possible causes of cracking on a foundation wall in the Baptistery of San Giovani in Florence, Italy.
关键词： Distinct element modeling,Masonry,Building pathology,Diagnosis,Crack propagation,Photogrammetry
更新于2025-09-23 15:23:52
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Close Range Photogrammetry and Constructive Characterization of Masonry Gothic Vaults
摘要： The representation of the plan of the roof in heritage buildings often raises the problem of direct measurement, since the points are not accessible. We currently have a wide range of indirect measurement techniques that solve this problem, and enable data to be captured on a massive scale with high levels of accuracy. The article discusses the use of Close Range Photogrammetry for the constructive analysis of gothic vaults in Tortosa Cathedral. The methodology and results of the campaign are explained below, which used technological resources that are available to any professional. The computerized processing of the 3D model generated makes possible to identify and analyze the geometric anomalies in the masonry vaults. Thereby it is obtained an unparalleled basis that enables us to undertake a detailed study of the vaulting, which was previously impossible. The geometrical deviation patterns can be related with the historical data available about the construction process of the gothic apse, fulfilling the lack of information from direct sources of some periods.
关键词： Photogrammetry,Masonry Vaults,Close Range Photogrammetry
更新于2025-09-04 15:30:14