DOIONLINE 
DOIONLINE Publish In |
International Journal of Advances in Mechanical and Civil Engineering (IJAMCE)-IJAMCE |
 Journal Home Volume Issue |
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Issue |
Volume-6,Issue-1 ( Feb, 2019 ) | |||||||||
Paper Title |
An Efficient Horizontal Stiffness Solution for Unbonded-Frebs | |||||||||
Author Name |
Hamid Toopchi-Nezhad, Majid Karaji, Mohammad Reza Ghotb | |||||||||
Affilition |
Department of Civil Engineering, Razi University, Kermanshah, 67149-67346, Iran | |||||||||
Pages |
25-30 | |||||||||
Abstract |
Unbonded-Fiber Reinforced Elastomeric Bearings (U-FREBs) area new type of elastomeric bearings that are placed between their top and bottom supports without any bonding. When subjected to lateral loads, U-FREBs exhibit rollover deformation which means that their top and bottom faces roll off the contact supports. As such, the lateral response characteristics of U-FREBs is different than conventional steel reinforced elastomeric bearings that are fixed to their top and bottom supports. The literature includes a set of analytical models for horizontal stiffness evaluation of U-FREBs. However, these models are not so effective to provide accurate estimation for a wide range of bearing physical dimensions. This paper presents a finite element analysis calibrated analytical model for horizontal stiffness evaluation of U-FREBs. The model has been calibrated based on the results of finite element analysis of a large group of bearings of different physical dimensions . The accuracy of the presented model is preserved for bearings of different shape factors. Keywords- seismic isolators; fiber reinforced elastomeric bearing; unbounded application; horizontal stiffness; finite element analysis; shape factor; aspect ratio | |||||||||
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