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Experimental and numerical study of Persian brick masonry barrel vaults under probable structural hazards

  • Saeid Sinaei (Department of Civil Engineering, Najafabad Branch, Islamic Azad University) ;
  • Esmaeel Izadi Zaman Abadi (Department of Civil Engineering, Najafabad Branch, Islamic Azad University) ;
  • Seyed Jalil Hoseini (Department of Civil Engineering, Najafabad Branch, Islamic Azad University)
  • Received : 2023.04.19
  • Accepted : 2023.06.15
  • Published : 2023.08.25

Abstract

Understanding and analysing the behaviour and response of historical structures in the face of climate changes and environmental conditions is of utmost significance for their preservation. There are several structural hazards associated with climate and hydrology changes in the region, including the settlement of piers, the rotation of piers, and temperature changes. The present study investigates the experimental and numerical structural behaviour of skewed and non-skewed Persian brick masonry barrel vaults under various conditions. The external loading conditions included pier rotation in five modes, settlement, and temperature variations in four states. Initially, the experiments extracted the mechanical properties of the scaled materials. Then, three semi-circular brick barrel vaults were tested with gravitational loads. The outcomes were used to develop and validate the finite element model. Following the development of the finite element model, numerical and parametric studies were conducted on the effect of the aforementioned structural hazards on the response of brick masonry barrel vaults with various Persian geometries (semi-circular, drop pointed, and four-centred), angles of skew (0, 15, 30, and 45 degrees), and dimensional ratios. According to the findings, the fragility of masonry materials makes historical structures susceptible to failure under different loading. A brick barrel vault fails in the presence of minor rotation and settlement of the piers. The four-centred geometric shape has the lowest performance among the seven Persian geometries; therefore, its health monitoring and retrofitting should be prioritised. In Isfahan, Iran, temperature variations, particularly during the warm seasons, cause critical conditions in such structures.

Keywords

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