Journal
ENGINEERING STRUCTURES
Volume 278, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2022.115422
Keywords
Recycled rubber; End-of-life tires (ELTs); Base isolator; Unbonded fiber-reinforced elastomeric; isolators (U-FREIs); Seismic risk mitigation
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Seismic isolators are passive control devices that reduce the energy transferred from an earthquake to the building. This paper presents a cost-effective method for seismic force mitigation in low-rise buildings using unbonded fiber-reinforced elastomeric isolators. The prototypes showed good behavior in shear and compression tests, meeting the standards and design requirements.
Seismic isolators are passive control devices that reduce the energy transferred from an earthquake to the superstructure, this avoiding damage to building elements. Seismic isolators are classified according to their connection to the structure; for example, unbonded isolators lack mechanical connections with the building. Unbonded fiber-reinforced elastomeric isolators (U-FREIs) are formed of intercalated layers of bidirectional polyester mesh used as reinforcement and agglomerated ground rubber from end-of-life tires (ELTs) as an elastomeric matrix. This paper presents the mechanical behavior of U-FREIs built at a reduced scale to provide an affordable alternative for the mitigation of seismic forces that affect low-rise buildings. The isolators were designed for a low-rise residential frame structure located in an area of high seismic hazard and were subjected to shear and compression tests to characterize their mechanical behavior. The experimental results show good behavior of the prototypes with respect to standards and design requirements.
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