| Summary: | 碩士 === 國立臺灣大學 === 土木工程學研究所 === 105 === Panel-type viscoelastic damper has been widely used to control seismic vibration for high-rise building in Taiwan. However, under DBE and MCE, the shear deformation of VE damper possibly exceeds the design deformation limit. In this situation, it’s necessary to clarify the behavior of VE damper and the effect on structure.
By three set of full-sacle viscoelastic damper experiment, the performance reduction of viscoelastic damper with different level of damage can be figure out. In the most serious condition of damage, because viscoelastic material is severely strained and brings with tearing which makes the steel plates partially detached from viscoelastic material, there is still 50% of damper performance left. Furthermore, a fractional derivative model for viscoelastic damper can be established from the experiment results.
For evaluating the performance of structure with viscoelastic damper, a stick model for 7-story building and a flexural-shear model for high-rise building are built respectively. After combine structure model with damper model, nonlinear dynamic analysis can be carried on. And it turned out that viscoelastic damper can reduce the story response effectively, and also be able to reduce the damage of structure. Even though damper damage occurs under MCE, it still has contribution in controling structure response. Especially when structure remains elastic or only exists slight plastic hinge, structure response can be reduced effectively by damaged viscoelastic damper during aftershock.
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