Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Evaluating the Effect of Using Lead Rubber Seismic Isolator System and Friction Pendulum System with Different Periods in Improving the Seismic Behavior of Steel Framed Buildings

Document Type : Original Article

Author
Houshyar Eimani kalehsar
Associate professor, Department of Civil Engineering, University of Mohaghegh Ardabili, Ardabil, Iran
10.22065/jsce.2023.382356.3017
Abstract
Abstract



In the present study, the evaluation of the seismic performance of steel framed buildings on two types of seismic isolation systems under far-fault earthquakes has been investigated. The isolator used are lead rubber bearing and single arc friction pendulum system. In order to compare the behavior of these isolators, the effective time period is considered as one of the most important properties of the isolator. The effective time period of the isolators is 2.5, 3.5 and 4.5. Three types of steel framed buildings with special moment resistant steel frames of 3, 7 and 12 stories are placed on these isolators. These three buildings represent low-rise, mid-rise and high-rise buildings. The effect of these two types of seismic isolators has been investigated in reducing the acceleration response and the relative displacement(drift) of the floors. The results show that the efficiency of both types of lead rubber bearing and single arc friction pendulum system decreases with the increase in the height of the building. The efficiency of the single arc friction pendulum system is 14% lower than that of the lead rubber bearing. Increasing the target natural period (decreasing the stiffness of the isolator) in reducing the response of the buildings in the lead rubber bearing has an average of 27% better performance than the single arc friction pendulum system.
Keywords
Keywords: Lead Rubber Bearing
Single Arc Friction Pendulum System
Far-Fault Earthquake
Special Moment Resistant Frame
Steel Framed Building

Subjects

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  • Receive Date 20 January 2023
  • Revise Date 07 April 2023
  • Accept Date 16 April 2023