Paper Title :An Efficient Horizontal Stiffness Solution for Unbonded-Frebs
Author :Hamid Toopchi-Nezhad, Majid Karaji, Mohammad Reza Ghotb
Article Citation :Hamid Toopchi-Nezhad ,Majid Karaji ,Mohammad Reza Ghotb ,
(2019 ) " An Efficient Horizontal Stiffness Solution for Unbonded-Frebs " ,
International Journal of Advances in Mechanical and Civil Engineering (IJAMCE) ,
pp. 25-30,
Volume-6,Issue-1
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
Type : Research paper
Published : Volume-6,Issue-1
DOIONLINE NO - IJAMCE-IRAJ-DOIONLINE-14956
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Copyright: © Institute of Research and Journals
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Published on 2019-04-25 |
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