TLS-Fem Integrated Structural Deformation Analysis on the Beamless Hall at Nanjing, China

Fang, Jiaojiao; Sun, Zeqing; Zhang, Y. R.

doi:10.5194/isprs-archives-xlvi-m-1-2021-215-2021

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…The point cloud generated from 3D surveys can capture the detailed geometry of buildings, which can then be used to create an accurate FEM model. This approach enables engineers to identify potential structural issues, such as cracks, deformations, and settling of the foundation, to develop appropriate remedial measures to preserve the building's structural integrity and historical value [Fang et al 2021;Sacco et al 2023]. In most cases, the 3D survey data in the form of the point cloud can directly be used to create an accurate FEM model for complex buildings [Castellazzi et al 2015].…”

Section: D Tools For the Documentation And Analysis Of Cultural Heritagementioning

confidence: 99%

3D Heterogeneous Database for Structural Analysis of Historic Buildings. A Discussion on Process Pipelines

Malik,

Garzulino,

Del Curto

2023

SDH

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This paper presents a methodology for creating a comprehensive heterogeneous 3D database for the structural evaluation of a historic building by using both non-destructive and destructive surveys combined with historical information. The availability of adequate data on the actual conditions is crucial when assessing the seismic vulnerability and structural behavior of a historic building and validating the results. A reliable 3D database must accept different kinds of data, e.g., the results of destructive/non-destructive surveys, historical information, etc. It must also be interrogated and enriched at any time. Therefore, creating such a 3D database may present several challenges in terms of data-gathering pipeline, comprehensiveness/redundancy, interpretation, organization, and integration with other heterogeneous data. The methodology we present in this paper includes 3D laser scanning, thermal imaging, and endoscopy combined with information regarding the state of conservation, construction history, materials, and techniques. We tested such methodology to create a database that was later used for Finite Element Modeling (FEM) to assess the seismic vulnerability of Diotti Palace, a neoclassical building that has been the seat of the Prefect of Milan since 1859. The results are analytically presented here. In conclusion, we highlight the pros and cons of the proposed methodology by means of a comparative discussion with the state of the art about 3D documentation pipelines for historic buildings and sites.

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Section: D Tools For the Documentation And Analysis Of Cultural Heritagementioning

confidence: 99%

3D Heterogeneous Database for Structural Analysis of Historic Buildings. A Discussion on Process Pipelines

Malik,

Garzulino,

Del Curto

2023

SDH

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“…Moreover, many holes were identified in the building, especially inside, due to narrow spaces; in these cases, the more flexible SfM acquisitions could help to reduce the occlusions. Fang et al [32] integrated TLS and FE to assess the structural deformation of a historic brick masonry building, the Beamless Hall at Linggu Temple in Nanjing, China. They deduced that its asymmetrical layout under self-weight was likely the main reason for its structural deformation.…”

Section: Introductionmentioning

confidence: 99%

Expeditious Low-Cost SfM Photogrammetry and a TLS Survey for the Structural Analysis of Illasi Castle (Italy)

Fabris

Granotto

Monego

2023

Drones

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The structural analysis of degraded historical buildings requires an adequate 3D model of the object. Structure from motion (SfM) photogrammetry and laser scanning geomatics techniques can satisfy this request by providing geometrically affordable data. The accuracy and resolution depend on the instruments and procedures used to extract the 3D models. This work focused on a 3D survey of Illasi Castle, a strongly degraded historical building located in northern Italy, aimed at structural analysis in the prevision of a static recovery. A low-cost drone, a single-lens reflex (SLR) camera, and a smartphone were used in the survey. From each acquired dataset, using the integration between the images acquired by the drone and the SLR camera, a 3D model of the building was extracted by means of the SfM technique. The data were compared with high-precision and high-resolution terrestrial laser scanning (TLS) acquisitions to evaluate the accuracy and performance of the fast and low-cost SfM approach. The results showed a standard deviation value for the point cloud comparisons in the order of 2–3 cm for the best solution (integrating drone and SLR images) and 4–7 cm using smartphone images. Finally, the integration of the best SfM model of the external walls and the TLS model of the internal portion of the building was used in finite element (FE) analysis to provide a safety assessment of the structure.

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High-Definition Survey of Architectural Heritage Fusing Multisensors—The Case of Beamless Hall at Linggu Temple in Nanjing, China

Fang

Zhang

et al. 2022

Sensors

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Following the development of digital measurement technology in recent years, the information contained in the measurement outcomes have become increasingly rich. However, the traditional graphical representation method based on vector graph needs to be updated. In this study, we use the Beamless Hall of Linggu Temple as an example. Measurements are conducted by using digital techniques, including three-dimensional (3D) laser scanning, close-range photogrammetry, and infrared thermal imaging. The pseudocolours that express spatial information and moisture distribution are calculated and generated through point clouds, which are used to express the land subsidence, wall deformation, moisture distribution, and other effects of the Beamless Hall. Furthermore, combining it with two-dimensional (2D) graphical representation, such as the plan, elevation, and section, damage-related information can be expressed intuitively and efficiently. This method can combine the advantages of graphics and images to provide a comprehensive and intuitive representation of the digital measurement results of brick architecture heritage. It can also provide a reference for surveying similar monuments and buildings of our architectural heritage.

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TLS-Fem Integrated Structural Deformation Analysis on the Beamless Hall at Nanjing, China

Cited by 3 publications

References 8 publications

3D Heterogeneous Database for Structural Analysis of Historic Buildings. A Discussion on Process Pipelines

3D Heterogeneous Database for Structural Analysis of Historic Buildings. A Discussion on Process Pipelines

Expeditious Low-Cost SfM Photogrammetry and a TLS Survey for the Structural Analysis of Illasi Castle (Italy)

High-Definition Survey of Architectural Heritage Fusing Multisensors—The Case of Beamless Hall at Linggu Temple in Nanjing, China

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