Stresses in and Tensile Strength of the Historical Arches at Mount Khajeh under the Sarpol-e Zahab Earthquake: An Analysis
الموضوعات :
1 - گروه مهندسی عمران، شعبه زاهدان، دانشگاه آزا اسلامی، زاهدان، ایران
الکلمات المفتاحية: Tensile strength, Reinforcement, Historical arches, Archaeological site, Mount Khajeh,
ملخص المقالة :
Masonry arches are among the most significant and foundational elements of traditional Iranian architecture. Arches have been used in Iran for millennia and are the origin of other curved structures such as vaults and domes. The Mount Khajeh archaeological site — which includes the Mount Khajeh Palace and the Kafar Castle and dates back to the Parthian and Sassanid periods — is located in the Mount Khajeh rural district, Timurabad district, Hamun county, Sistan and Baluchestan province, Iran. The arches at this site rank among the most outstanding structures in traditional Iranian architecture. Given the historical, cultural and touristic significance of the arches as well as their fragility, it is crucial to determine their current condition as the first step in strengthening and restoring them. We modeled the arches in Abaqus using the finite element method (FEM) and ensured the method’s efficacy through validation in the software. We then evaluated the time-history analysis of the arches under the Sarpol-e Zahab earthquake accelerogram and represented the results as hysteresis graphs. Modeling and analyzing the arches in reinforced and unreinforced scenarios showed that reinforcing with FRP rebars substantially improves the seismic behavior, cracking pattern and lateral resistance of the arches. The study also found that the NSM FRP technique is least harmful to the arches’ appearance.
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