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Earthquakes and Structures
  Volume 19, Number 4, October 2020 , pages 261-272
DOI: https://doi.org/10.12989/eas.2020.19.4.261
 


Rubber bearing isolation for structures prone to earthquake - a cost effectiveness analysis
A.B.M. Saiful Islam and Mahmoud Sodangi

 
Abstract
    Recent severe earthquakes in and around the vital public places worldwide indicate the severe vulnerability of ground excitation to be assailed. Reducing the effect of seismic lateral load in structural design is an important conception. Essentially, seismic isolation is required to shield the superstructure in such a way that the building superstructure would not move when the ground is shaking. This study explores the effectiveness, design, and practical feasibility of base isolation systems to reduce seismic demands on buildings of varying elevations. Thus, static and dynamic analyses were conducted based on site-specific bi-directional earthquakes for base-isolated as well as fixed-based buildings. Remarkably, it was discovered that isolators used in low-rise to high-rise structures tend to significantly decrease the structural responses of seismic prone buildings. The higher allowable horizontal displacement induces structural flexibility and ensure good structural health of the building stories. Reinforcement from vertical and horizontal members can be reduced in significant amounts for BI buildings. Thus, although incorporating base isolators increases the initial outlay, it considerably diminishes the total structural cost.
 
Key Words
    seismic prone building; dynamic analysis; economic feasibility; nonlinear behavior; rubber bearing; seismic isolation; structural feasibility
 
Address
A.B.M. Saiful Islam and Mahmoud Sodangi:Department of Civil & Construction Engineering, College of Engineering,
Imam Abdulrahman Bin Faisal University, Dammam 31451, Saudi Arabia
 

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