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A roller type base isolation device with tensile strength

dc.contributor.authorMaureira-Carsalade N.
dc.contributor.authorPardo E.
dc.contributor.authorOyarzo-Vera C.
dc.contributor.authorRoco A.
dc.date.accessioned2020-09-02T22:22:52Z
dc.date.available2020-09-02T22:22:52Z
dc.date.issued2020
dc.identifier10.1016/j.engstruct.2020.111003
dc.identifier.citation221, , -
dc.identifier.issn01410296
dc.identifier.urihttps://hdl.handle.net/20.500.12728/5275
dc.descriptionBase isolation is an efficient strategy for protecting structures, especially in countries with high seismic risk, such as Chile. This paper presents the conceptual model, mathematical model, experimental validation and numerical analysis of a roller type base isolation device that aims to solve problems of limited tensile strength (compared to its compressive strength) and lateral instability of all types of rubber bearing isolators when faced with elevated axial load. The conceptual model describes the device's components and operation. The mathematical model establishes its constitutive law based on the equilibrium equations formulated considering large lateral displacements. Experimental tests were run on a shake-table with a load frame to simulate the isolator's interaction with the superstructure, considering a combination of the device's design parameters, in order to identify their effect. In the numerical analysis, six simple frame buildings were modelled and subjected to a seismic record using the proposed roller isolator. Error parameters were obtained between the numerical predictions and the experimental results in each loading and unloading cycle, varying between 1.6% and 5.1% for dissipated energy and 4.0% to 17.7% for the magnitude of force. The proposed device worked as a seismic isolator, reducing the structure's response in a magnitude order in relation to the building fixed on its base. © 2020
dc.language.isoen
dc.publisherElsevier Ltd
dc.subjectExperimental validation
dc.subjectFrictional damping
dc.subjectNon-linear mathematical model
dc.subjectTime-history analysis
dc.subjectCompressive strength
dc.subjectEnergy dissipation
dc.subjectNonmetallic bearings
dc.subjectNumerical analysis
dc.subjectRollers (machine components)
dc.subjectSeismology
dc.subjectTensile strength
dc.subjectUnloading
dc.subjectBase isolation devices
dc.subjectEfficient strategy
dc.subjectEquilibrium equation
dc.subjectExperimental validations
dc.subjectLateral displacements
dc.subjectLateral instability
dc.subjectLoading and unloading
dc.subjectNumerical predictions
dc.subjectStructural design
dc.subjectbuilding
dc.subjectcomputer simulation
dc.subjectdynamic response
dc.subjectefficiency measurement
dc.subjectnumerical model
dc.subjectstructural response
dc.subjecttensile strength
dc.subjectChile
dc.titleA roller type base isolation device with tensile strength
dc.typeArticle


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