Abstract
Abstract. A method integrating terrestrial laser scanning (TLS) and finite element modelling (FEM) is proposed in this study. It aims at assessing the structural deformation of a historic brick-masonry building, the Beamless Hall at Linggu Temple in Nanjing, China. The building was composed of a series of vaults and arches, the largest among whom spans over 11m. TLS (Z+F Imager5010X) was used to collect 3D point cloud with high density. Point slices and geometric feature computation (verticality) were employed to detect geometric displacement quantitatively and intuitively. FEM-simulation was based on an ideal 3D model ignoring geometric anomalies. Results show that the Beamless Hall has inherent structural defect owing to its asymmetric layout along the transverse axis. Computing geometric feature of point cloud is fast and intuitive to detect and show geometric deviation. Inferred by FEM-simulated results and TLS-based deviation analysis, the building’s asymmetrical layout under self-weight is probably the main reason causing its structural deformation. Further developments include FEM based on as-built geometry, corrected materials parameters, and a comprehensive geometric deviation analysis.
Highlights
Introduction1.1 Structural deformation analysis on historic masonry buildings
1.1 Structural deformation analysis on historic masonry buildingsMasonry structures are widespread over the world
finite element modelling (FEM)-simulated results show that the stress distribution and structural deformation pattern of the Beamless Hall under self-weight is not symmetrical along the transverse axis
Summary
1.1 Structural deformation analysis on historic masonry buildings. Masonry structures are widespread over the world. Most historic structures are made of unreinforced materials such as stones, bricks and mortar. Masonry vaults and arches are typical to such structure. Assessing their structural behavior is crucial for preventive conservation and technical intervention. Multi-source information is needed and non-invasive methodology is favored. A lot of research efforts have been devoted to this field, among which accurate geometric survey, numerical modeling and non-destructive testing (NDT) are employed owing to their non-invasive attributes (Maione et al, 2018)
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