Dynamic characteristics of combined isolation systems using rubber and wire isolators
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The present study aims to investigate the dynamic properties of a novel isolation system composed ofseparate rubber and wire isolators. The testing program comprised pure compressive, pure-shear,compressive-stress dependence, and shear-strain dependence tests that used full-scale test specimensaccording to ISO 22762-1. A total of 22 test specimens were fabricated and investigated. Among the tests,the pure compressive test was a destructive test that reached up to the failure stage, whereas the otherswere nondestructive tests before the failure stage. Similar to the pure-shear test, at each compressivestresslevel in the compressive dependence test or at each shear-strain level in the shear-straindependence test, the cyclic loading was conducted for three cycles. In the nondestructive tests, examinationof the dynamic shear properties in the X-direction was independent of the Y-direction. The testresults revealed that the increase in the shear strain increased the energy dissipation but decreased thedamping ratio, whereas the increase in the compressive stress increased the damping ratio. In addition, amacro model was developed to simulate the load-displacement response of the isolation systems, andthe prediction results were consistent with the experimental results.
Abstract
The present study aims to investigate the dynamic properties of a novel isolation system composed ofseparate rubber and wire isolators. The testing program comprised pure compressive, pure-shear,compressive-stress dependence, and shear-strain dependence tests that used full-scale test specimensaccording to ISO 22762-1. A total of 22 test specimens were fabricated and investigated. Among the tests,the pure compressive test was a destructive test that reached up to the failure stage, whereas the otherswere nondestructive tests before the failure stage. Similar to the pure-shear test, at each compressivestresslevel in the compressive dependence test or at each shear-strain level in the shear-straindependence test, the cyclic loading was conducted for three cycles. In the nondestructive tests, examinationof the dynamic shear properties in the X-direction was independent of the Y-direction. The testresults revealed that the increase in the shear strain increased the energy dissipation but decreased thedamping ratio, whereas the increase in the compressive stress increased the damping ratio. In addition, amacro model was developed to simulate the load-displacement response of the isolation systems, andthe prediction results were consistent with the experimental results.
참고문헌 (21)
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