Lateral Impact Resilient double concave Friction Pendulum (LIR-DCFP) bearing: Formulation, parametric study of the slider and three-dimensional numerical example

•A new frictional isolator resilient to internal lateral impact was proposed.•A detailed three-dimensional formulation was developed.•A parametric analysis of the geometry of the inner slider was conducted.•The use of the proposed isolator improves the response of base-isolated structures. Seismic i...

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Veröffentlicht in:Engineering structures 2021-04, Vol.233, p.111892, Article 111892
Hauptverfasser: Auad, Gaspar, Almazán, José L.
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description •A new frictional isolator resilient to internal lateral impact was proposed.•A detailed three-dimensional formulation was developed.•A parametric analysis of the geometry of the inner slider was conducted.•The use of the proposed isolator improves the response of base-isolated structures. Seismic isolation has been one of the best alternatives in protecting structures, being frictional isolators one of the most used devices in constructing isolation systems. Under extreme seismic inputs, the impact between the inner slider and the restraining rims of the plates could occur. This internal impact has been indicated as one of the main contributors to the failure of frictional pendulum bearings. This paper presents a new type of frictional device, the Lateral Impact Resilient double concave Friction Pendulum (LIR-DCFP) bearing. This device has an improved inner slider that enhances the dynamic behavior if the lateral capacity of the isolator is overcome. The three-dimensional formulation of the LIR-DCFP bearing is presented and proposed to perform dynamics analyzes. A parametric analysis was performed to evaluate the influence of the geometry of the inner slider. Finally, a comparative three-dimensional analysis between the dynamic response of a structure isolated using LIR-DCFP bearings and double concave Friction Pendulum (DCFP) bearings is presented. Important reductions in the base shear, inter-story drifts, and absolute accelerations are achieved using LIR-DCFP bearings.
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Seismic isolation has been one of the best alternatives in protecting structures, being frictional isolators one of the most used devices in constructing isolation systems. Under extreme seismic inputs, the impact between the inner slider and the restraining rims of the plates could occur. This internal impact has been indicated as one of the main contributors to the failure of frictional pendulum bearings. This paper presents a new type of frictional device, the Lateral Impact Resilient double concave Friction Pendulum (LIR-DCFP) bearing. This device has an improved inner slider that enhances the dynamic behavior if the lateral capacity of the isolator is overcome. The three-dimensional formulation of the LIR-DCFP bearing is presented and proposed to perform dynamics analyzes. A parametric analysis was performed to evaluate the influence of the geometry of the inner slider. Finally, a comparative three-dimensional analysis between the dynamic response of a structure isolated using LIR-DCFP bearings and double concave Friction Pendulum (DCFP) bearings is presented. 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Finally, a comparative three-dimensional analysis between the dynamic response of a structure isolated using LIR-DCFP bearings and double concave Friction Pendulum (DCFP) bearings is presented. Important reductions in the base shear, inter-story drifts, and absolute accelerations are achieved using LIR-DCFP bearings.</description><subject>Bearings</subject><subject>Dimensional analysis</subject><subject>Dynamic response</subject><subject>Friction</subject><subject>Frictional isolator</subject><subject>Frictional pendulum system</subject><subject>High friction interface</subject><subject>Isolation systems</subject><subject>Isolators</subject><subject>Lateral impact</subject><subject>Mathematical analysis</subject><subject>Parametric analysis</subject><subject>Parametric statistics</subject><subject>Pendulums</subject><subject>Seismic isolation</subject><subject>Seismic response</subject><subject>Three dimensional analysis</subject><subject>Three-dimensional formulation</subject><issn>0141-0296</issn><issn>1873-7323</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqFkd1u1DAQhS0EEkvhGbDEDUhkO7Y3icNdtWVhpZVaVeXacuxJ8SqJg3-q9nF4U7xaxC1XMyOd72hmDiHvGawZsObyuMb5IaaQTVpz4GzNGJMdf0FWTLaiagUXL8kK2IZVwLvmNXkT4xEAuJSwIr8POmHQI91PizaJ3mF0o8M5UetzPyI1fjb6EekuOJOcn-ktzjaPeaIfD_u76nq7u_1Ee9TBzQ9f6M6HKY_6JPxMFx30hKmANKZsn6kfaPqJNI7OYqB6tmUMiJV1E86xMGWPOU9YiNLhk56WEd-SV4MeI777Wy_Ij93X--336nDzbb-9OlRGbESqNqbjfT000NnGAIK0IDfQt6ZrDetYjz2A7FoOw8CRo26hqQWTDYqmN7ptxAX5cPZdgv-VMSZ19DmUlaLiNci6E7w-qdqzygQfY8BBLcFNOjwrBuqUhzqqf3moUx7qnEchr84kliMeHQYVTXm0QesCFq317r8efwB3dJps</recordid><startdate>20210415</startdate><enddate>20210415</enddate><creator>Auad, Gaspar</creator><creator>Almazán, José L.</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7ST</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope><scope>SOI</scope></search><sort><creationdate>20210415</creationdate><title>Lateral Impact Resilient double concave Friction Pendulum (LIR-DCFP) bearing: Formulation, parametric study of the slider and three-dimensional numerical example</title><author>Auad, Gaspar ; Almazán, José L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c343t-4c92b5f609d6c0e08d0840b7c97c191beb0089720ff2e2ea70653186e36bca763</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Bearings</topic><topic>Dimensional analysis</topic><topic>Dynamic response</topic><topic>Friction</topic><topic>Frictional isolator</topic><topic>Frictional pendulum system</topic><topic>High friction interface</topic><topic>Isolation systems</topic><topic>Isolators</topic><topic>Lateral impact</topic><topic>Mathematical analysis</topic><topic>Parametric analysis</topic><topic>Parametric statistics</topic><topic>Pendulums</topic><topic>Seismic isolation</topic><topic>Seismic response</topic><topic>Three dimensional analysis</topic><topic>Three-dimensional formulation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Auad, Gaspar</creatorcontrib><creatorcontrib>Almazán, José L.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Environment Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Environment Abstracts</collection><jtitle>Engineering structures</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Auad, Gaspar</au><au>Almazán, José L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Lateral Impact Resilient double concave Friction Pendulum (LIR-DCFP) bearing: Formulation, parametric study of the slider and three-dimensional numerical example</atitle><jtitle>Engineering structures</jtitle><date>2021-04-15</date><risdate>2021</risdate><volume>233</volume><spage>111892</spage><pages>111892-</pages><artnum>111892</artnum><issn>0141-0296</issn><eissn>1873-7323</eissn><abstract>•A new frictional isolator resilient to internal lateral impact was proposed.•A detailed three-dimensional formulation was developed.•A parametric analysis of the geometry of the inner slider was conducted.•The use of the proposed isolator improves the response of base-isolated structures. 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source ScienceDirect Journals (5 years ago - present)
subjects Bearings
Dimensional analysis
Dynamic response
Friction
Frictional isolator
Frictional pendulum system
High friction interface
Isolation systems
Isolators
Lateral impact
Mathematical analysis
Parametric analysis
Parametric statistics
Pendulums
Seismic isolation
Seismic response
Three dimensional analysis
Three-dimensional formulation
title Lateral Impact Resilient double concave Friction Pendulum (LIR-DCFP) bearing: Formulation, parametric study of the slider and three-dimensional numerical example
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