| Summary: | 碩士 === 國立中央大學 === 土木工程研究所 === 94 === The objective of the present study is to investigate the nonlinear responses and the damage state of the RC building to the ground motions. In addition, the effectiveness of the vibration reductions in terms of the maximum story drifts and the story shear force for a RC building with displacement-depended type damping system is also analyzed numerically.
The contents of the studies are（1）the analysis of the nonlinear responses of a RC building to the earthquake records,（2）the analysis of nonlinear responses and the damages states of a RC building with the displacement-depended type efficiency-enhanced damping system to earthquakes and（3）the influence on nonlinear responses due to the different values of the strength reduction coefficient and the post-yielding stiffness of the damping system used. Furthermore, the effect of two models of different nonlinear characteristics, kinematic model and Taketa model, on structural responses is also analyzed.
It is found that（1）the results of the nonlinear analysis present the unique damage conditions under the different types of earthquakes,（2）the maximum story drifts and shear in columns could effectively be reduced by using D-type damping systems, （3）the maximum story drifts could be reduced effectively but the maximum story shear could not be reduced effectively by using D-type damping system in the cases of the near-field earthquake excitations,（4）better quakeproof results can be achieved if proper values of the strength reduction coefficient and the post-yielding stiffness of the damping system are chosen in analysis and (5) the results of analysis are closed to each other for the kinematic model and the Taketa model. But the displacement responses resulting from the later model are a little bit larger than that of the former one.
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