粘弾性体の温度・振動数・振幅依存を考慮した構成則 : その2 温度上昇および歪・歪速度がもたらす非線形性のモデル化

概要

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Part 2 proposes nonlinear constitutive rule for the viscoelastic material subjected to the earthquake-like short-duration loading. It is based on the fractional time-derivatives of the stress and strain, and is an extension of the linear rule proposed in Part 1. In order to model the complex interactions among temperature, frequency, and strain sensitivities, the rule considers both heat-oriented nonlinearity and strain-oriented nonlinearity: It updates stiffness and damping step-by-step according to the material temperature-rise caused by energy dissipation, as well as maximum strain and maximum strain-rate developed in the previous steps. The rule is reasonably accurate over the wide ranges of temperature 0℃ to 40℃, frequency 0.1 Hz to 3 Hz, and peak shear strain 10% to 300%.
社団法人日本建築学会の論文
2002-11-30