an Effect of Seismic Horizontal Loads on the Structure of the Taj al-Molk Dome in Jameh Mosque of Isfahan مقالة

مؤلف: Ashrafi، Alireza ؛ Karimnejad، Mohammad Mehdi ؛

كاتب مسؤول: Abouei، Reza ؛

International Journal of Applied Arts Studies Aug – Sep 2020, Volume 5 - Number 3 التصنيف A (Azad University (‎14 صفحة - من 53 إلی 66 )

الکلمات المفتاحية: Abacus Software Taj al Molk Dome Seismic Horizontal Loads Geometric Characteristics

خلاصة:

The external forces acting on the structures are divided into two categories based on the direction of application: a. Loads applied in the vertical direction or gravity loads such as: dead loads, live loads, snow load, etc. B. Loads applied in the horizontal direction or lateral loads such as: earthquake load, wind load, etc. Therefore, in this study, the behavior of the northern dome of Isfahan Jameh Mosque (Taj al-Molk dome) was examined under horizontal seismic loads using a finite element three-dimensional model (3D FE) (nonlinear dynamic analysis) with one level of numerical complexity with the aim to cover the structure of the dome, which has a medium to high complexity in operation. The results indicated that the structure of the Taj al-Molk dome is vulnerable to horizontal loads, so that if the residual deformation occurs in the range of 0.4% and 0.8%, it will cause the structure to collapse. On the other hand, geometric features (irregularity in the plan and height of the dome, the presence of large openings, height changes in the cross section as well as the presence of the dome or an internal inclined arch) play an essential role in the seismic performance of the building.

ملخص الجهاز:

Therefore, in this study, the behavior of the northern dome of Isfahan Jameh Mosque (Taj al-Molk dome) was examined under horizontal seismic loads using a finite element three-dimensional model (3D FE) (nonlinear dynamic analysis) with one level of numerical complexity with the aim to cover the structure of the dome, which has a medium to high complexity in operation. In the present study, the behavior of the historical dome of Taj al-Molk is analyzed under the horizontal seismic loads using a three-dimensional finite element (3D FE) model. In the following, the finite element method (numerical method of structural analysis) was implemented in Abaqus/Standard CAE software to investigate the horizontal seismic loads on the dome. Based on such an approach in analysis, and considering the geometric effects of large deformations and nonlinear behavior of materials, the Concrete Damage Plasticity (CDP) model, which is fully available in standard analysis and design packages in the software like Abacus is used for masonry structures. The resistance range of a standard Drucker-Prager level, modified by a concept called the Kc parameter, is equal to the ratio of yield stress in the three-axial tensile test to its corresponding value in compression mode (Figure below). Based on the general analysis and using the results obtained in this study, the following results were obtained: - The results of the nonlinear dynamic simulation of the structure revealed the high vulnerability of the Taj al-Molk dome structure under horizontal loads.

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