Investigating the Performance of Multi-Span Structures with Different Geometries and Heights under Near-Fault and Far-Fault Accelerations
نویسندگان
1 Assistant Professor, Department of Civil Engineering, Pooyesh Institute of Higher Education, Qom, Iran
2 Professor, Department of Civil Engineering, Kashan Branch, Islamic Azad University, Kashan /Isfahan, Iran
doi
10.48303/jsee.2024.2031074.1096چکیده
This study presents a seismic assessment of arched masonry structures through a detailed analysis of three existing multi-span structures. The three selected structures have vault-to-spring ratios (L/B) of 1.27, 2.25 and 3.3 and three different heights. The structures were subjected to six near-fault and far-fault ground motion accelerations. When the number of spans increases, the stiffness and strength increase two times in the structure with a square plan and three times in the rectangular plan. Also, from one span to two, about 75% and from two to three, about 30% increase in ductility is observed. In the narrower multi-span structure, with the possible movement of the spans together, longitudinal failures occur between the vaults. Increasing the height has little effect on the location of hinges but significantly increases displacements. In the narrower structure, with the increase in height, the difference in the displacement of the spring to the vault has increased significantly and has been reported up to five times. In the square structure, displacement increases by more than 50%, while in narrower structures, it increases by about three times.
