Comparison Of Classical And Voxel Model Analyses Of The Gaziantep Hüseyin Paşa Mosque Observed During The February 2023 Earthquake

Comparison Of Classical And Voxel Model Analyses Of The Gaziantep Hüseyin Paşa Mosque Observed During The February 2023 Earthquake

Journal of Brilliant Engineering (BEN)
Volume 5 - Issue 4 - October 2024

Yusuf Demirel

Abstract

In order to examine the structural behavior of the Gaziantep Hüseyin Pasha Mosque, whose behavior was observed in the February 6, 2023 earthquake, point cloud readings were taken for survey purposes and core samples were taken from the masonry stone elements to determine the material axial load capacity and shear strength. Earthquake spectra were taken from the nearest earthquake station, station TK0723, from AFAD data, and the structure was modeled and analyzed using classical and voxel model methods. In the classical modeling method, the structure is measured with traditional methods and the internal and external dimensions and element thicknesses are determined. Then, these elements are defined in the 3D model, material properties and element definitions, geometric shapes of the elements are made with the engineer's prediction, and the structural relationship and load transfer definitions between the dome, pendentive, arch, load-bearing wall and column elements are left to the engineer's interpretation. In voxel modeling, the structure is transferred to the 3D model as a whole by means of auxiliary programs and methods due to the photographic scanning of the structure as a whole. In this way, the structure is directly modeled as a whole without any element definition, dimensioning or element load transfer relationship acceptance in the 3D model. In this way, the structure and structural element behavior during the construction phase and the entire structure load transfer are not interfered with during the analysis phase. By comparing the behavior and damages of Gaziantep Hüseyin Pasha Mosque under the detected earthquake with the results of the two analytical methods obtained, the realism of both models and their behavior under the earthquake were examined. In both modeling methods, stress concentrations are observed in the arches and the dome-arch-over-arch connections, but in the classical modeling, it was determined that these concentrations were more intense and the resulting damages were less than the stress concentrations obtained in the classical model. In the voxel model, it was observed that there were similar stress concentrations, but the stresses were more distributed as a result of the voxel model analysis. It was determined that the damages that occurred after the earthquake behavior of the mosque overlapped with the scattered stress concentrations in the voxel model. As a result of the comparison of both models, it was concluded that the results obtained with the element definition in the classical modeling did not overlap with the structural behavior, and the behavior obtained by modeling the structure as a whole overlapped more with the earthquake behavior of the structure.

Keywords

Historical building earthquake behavior, Point cloud, Classical structural model, Voxel structural model, 6th February earthquake.
https://doi.org/10.36937/ben.2024.4961