FUNDAMENTAL STUDY OF DAMPING MODELS WITH ENHANCED FREQUENCY INDEPENDENCE IN NONLINEAR SEISMIC RESPONSE ANALYSIS

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Other Title
  • 非線形地震応答解析における振動数非依存性を高めた減衰モデルの基礎的検討
  • Comparison of causality-based damping and uniform damping models
  • 因果性に基づく減衰モデルとUniform減衰モデルの比較

Abstract

<p>Causal hysteretic damping, extended Rayleigh damping, and uniform damping are models with frequency-independent damping ratios over a wide frequency range. However, there are many unclear points about its applicability to inelastic problems. Therefore, in this study, in order to compare the vibration characteristics of these damping models, analyses were performed by inputting white noise to multiple 1-degree-of-freedom model with different natural frequencies. As a result, it was confirmed that these damping models are frequency-independent even under inelastic conditions. Furthermore, causal hysteretic damping and extended Rayleigh damping can compute in the same computation time as conventional Rayleigh damping.</p>

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