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Finite Element Study of the Bending and Compression Behavior of Modified Steel-Reinforced Elastomeric Isolators
One of the most popular technologies in seismic protection is base isolation—the separation of a structure from the ground with a flexible layer that increases the lateral period of the structure in the event of an earthquake. Steel-reinforced elastomeric isolators, one of the most popular bearings in base isolation practice, are often too heavy and costly to use in residential, commercial, and developing world projects. In this paper, the bending and compression behavior of infinite strip-shape bearings with steel removed from the center of each reinforcement layer is studied. The bending and compression moduli, and shear and normal stress distributions of each case were analyzed using finite element modeling. Under compression, the compression modulus decreased, maximum normal stress decreased, and maximum shear stress increased with increasing area removed. Under rotation, the bending modulus decreased, and normal and shear stresses normalized by the moment generally increase with increasing area removed. In every case, reducing the area of the reinforcement caused concentrations of stress under the remaining reinforcement that may require special consideration in bearing design.
Finite Element Study of the Bending and Compression Behavior of Modified Steel-Reinforced Elastomeric Isolators
One of the most popular technologies in seismic protection is base isolation—the separation of a structure from the ground with a flexible layer that increases the lateral period of the structure in the event of an earthquake. Steel-reinforced elastomeric isolators, one of the most popular bearings in base isolation practice, are often too heavy and costly to use in residential, commercial, and developing world projects. In this paper, the bending and compression behavior of infinite strip-shape bearings with steel removed from the center of each reinforcement layer is studied. The bending and compression moduli, and shear and normal stress distributions of each case were analyzed using finite element modeling. Under compression, the compression modulus decreased, maximum normal stress decreased, and maximum shear stress increased with increasing area removed. Under rotation, the bending modulus decreased, and normal and shear stresses normalized by the moment generally increase with increasing area removed. In every case, reducing the area of the reinforcement caused concentrations of stress under the remaining reinforcement that may require special consideration in bearing design.
Finite Element Study of the Bending and Compression Behavior of Modified Steel-Reinforced Elastomeric Isolators
Lecture Notes in Civil Engineering
Gupta, Rishi (editor) / Sun, Min (editor) / Brzev, Svetlana (editor) / Alam, M. Shahria (editor) / Ng, Kelvin Tsun Wai (editor) / Li, Jianbing (editor) / El Damatty, Ashraf (editor) / Lim, Clark (editor) / Noggle, Rose (author) / Van Engelen, Niel (author)
Canadian Society of Civil Engineering Annual Conference ; 2022 ; Whistler, BC, BC, Canada
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2022 ; Chapter: 33 ; 483-495
2023-08-06
13 pages
Article/Chapter (Book)
Electronic Resource
English