Volume 15, Issue 4 (11-2025)                   IJOCE 2025, 15(4): 557-571 | Back to browse issues page

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Kamgar R, Pooladi Baghbadorani H, Heidarzadeh H. SEISMIC IMPROVEMENT OF LOW-RISE BUILDINGS USING OPTIMUM VARIABLE AND FIXED RADIUS FRICTION PENDULUM ISOLATOR. IJOCE 2025; 15 (4) :557-571
URL: http://ijoce.iust.ac.ir/article-1-655-en.html
SEISMIC IMPROVEMENT OF LOW-RISE BUILDINGS USING OPTIMUM VARIABLE AND FIXED RADIUS FRICTION PENDULUM ISOLATOR
R. Kamgar1 , H. Pooladi Baghbadorani1 , H. Heidarzadeh *1
1- Department of Civil Engineering, Shahrekord University, Shahrekord, Iran
Abstract:   (634 Views)
Controlling vibrations in short-period structures subjected to seismic loading is crucial for improving the seismic performance of the structure. This paper investigates friction pendulum isolators with both constant and variable radius as a means to enhance the seismic behavior of structures. Friction pendulum isolators with a constant radius are susceptible to intensification phenomena in near-field earthquakes. Modifying the isolator radius leads to changes in its period and stiffness, thereby mitigating the amplification effect. The study first models and validates the friction pendulum isolator with a constant radius using ABAQUS software. Subsequently, the performance of these isolators, both with constant and variable radius, is examined under harmonic loading to improve structural behavior. The results show that variable radius pendulum friction isolators have been able to increase energy absorption by an average of 25%, 41%, and 14%, respectively, in response to near- and far-field earthquakes such as the Manjil, Loma Prieta, and Northridge earthquakes. This reduces the transfer of earthquake forces to the structure and maintains the integrity of the structure during an earthquake.
Keywords: Seismic performance, Friction pendulum isolators, Fixed and variable radius, Lateral loading
Full-Text [PDF 523 kb]   (285 Downloads)    
Type of Study: Research | Subject: Applications
Received: 2025/09/28 | Accepted: 2025/11/13 | Published: 2025/11/15
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