4th International Conference on Urban Earthquake Engineering
巻, 号, ページ
pp. 459-466
出版年月
2007年3月
出版者
和文:
英文:
TIME-HISTORY ANALYSIS MODEL FOR VISCOELASTIC DAMPER Under Long Duration Load
会議名称
和文:
英文:
4th International Conference on Urban Earthquake Engineering
開催地
和文:
英文:
Yokohama
ファイル
アブストラクト
Viscoelastic damper dissipates energy through shear deformation of the viscoelastic 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 analysis method proposed: The combines one-dimensional heat transfer analysis and viscoelastic 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, this paper proposes a fast and sufficiently accurate algorithm for calculating fractional time-derivatives of stress and strain in the viscoelastic damper. The algorithm also has an advantage of requiring substantially smaller memory space. At every step, numerical integration using past stress and strain data is required, but the proposed algorithm needs only a small portion of such data: it selects and stores the data at much longer interval than the original algorithm.
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