TY - JOUR
T1 - Spectrum-based response prediction of asymmetric structure with supplemental viscous damping
AU - Kasai, Kazuhiko
AU - Yamashita, Tadamichi
AU - Yamazaki, Yoshihiro
AU - Igusa, Takeru
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2009/2
Y1 - 2009/2
N2 - Seismic response of one-story structure with the significant stiffness eccentricity, developing a torsional mode, is studied in this paper. Viscous damping is added to reduce both the translational and torsional vibration of the structure. The structure in such a case possesses the so-called non-proportional damping, which makes the conventional modal analysis using undamped vibration mode more inaccurate. On the other hand, more accurate method using the complex-valued mode is not easy for practical analysis, and is not very effective to understand dynamic response characteristics of the structure. Hence, this paper proposes a new modal analysis which uses the real-valued mode and yet treats the non-proportional damping effect with a unique correction process. Many cases of non-proportional damping are examined, and the reasonable accuracy of the proposed method is demonstrated through comparison with the other existing methods.
AB - Seismic response of one-story structure with the significant stiffness eccentricity, developing a torsional mode, is studied in this paper. Viscous damping is added to reduce both the translational and torsional vibration of the structure. The structure in such a case possesses the so-called non-proportional damping, which makes the conventional modal analysis using undamped vibration mode more inaccurate. On the other hand, more accurate method using the complex-valued mode is not easy for practical analysis, and is not very effective to understand dynamic response characteristics of the structure. Hence, this paper proposes a new modal analysis which uses the real-valued mode and yet treats the non-proportional damping effect with a unique correction process. Many cases of non-proportional damping are examined, and the reasonable accuracy of the proposed method is demonstrated through comparison with the other existing methods.
KW - Asymmetric frame structure
KW - Complete-Quadratic-Combination rules
KW - High viscous damping
KW - Non-proportional damping
KW - Response spectral method
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U2 - 10.3130/aijs.74.225
DO - 10.3130/aijs.74.225
M3 - Article
AN - SCOPUS:79954560992
VL - 74
SP - 225
EP - 234
JO - Journal of Structural and Construction Engineering
JF - Journal of Structural and Construction Engineering
SN - 1340-4202
IS - 636
ER -