Properties of 12th International Conference on Wind Engineering ICWE12
巻, 号, ページ
pp. 1263-1270
出版年月
2007年7月
出版者
和文:
英文:
会議名称
和文:
英文:
12th International Conference on Wind Engineering
開催地
和文:
英文:
"Cairns,Australia"
ファイル
アブストラクト
Viscoelastic damper dissipates energy through shear deformation of the viscoelas-tic material, and this causes temperature rise and softening of the material. Under long duration load, therefore significant heat conduction and transfer can occur and control the temperature-rise effects. These and frequency sensitivities are considered in the two analysis methods proposed: The first method combines three-dimensional heat transfer analysis and static analysis using a common finite element model of the damper, and it estimates damper dynamic properties under long duration load. The second combines one-dimensional heat transfer analysis and viscoelas-tic constitutive rule using fractional time-derivatives of stress and strain, and it calculates step-by-step the force-deformation time histories of the damper. In addition, a simplified evaluation method using sinusoidal-wave is proposed in this study, and the results obtained by this method show excellent accuracy the damper properties under long random loading.
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