초록

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Abstract ▼ AI-Helper

In this study, changes of natural frequencies and damping ratios of structures which have various dynamic characteristics according to response level were identified using a shaking table and downsized shear structures. Changes of dynamic characteristics according to response level were analyzed th...

In this study, changes of natural frequencies and damping ratios of structures which have various dynamic characteristics according to response level were identified using a shaking table and downsized shear structures. Changes of dynamic characteristics according to response level were analyzed through transient vibration tests and vibration tests using white noise whose response level were controled. As a result of test, when response level of structures increased, natural frequencies of each mode of every experiment target were consistently decreased, and frequencies of upper mode decreased more rapidly than lower mode. in addition, when response level of structures increased, damping ratios increased and then they had constant values after the certain points and when natural frequency of structure increased angles of increasing area decreased.

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