open access

https://hdl.handle.net/2115/87531

Seismic response control effects for reinforced-concrete buildings incorporating a passive variable friction device

英語

Reinforced concrete structure

2022-12-15

Elsevier

Journal of Building Engineering

62

105388

The seismic response behavior and control effects of reinforced concrete (RC) structures incor-porating a variable friction damper were numerically investigated in this study. The damper considered was a passive displacement-dependent variable friction device (VFD), whose sliding force decreases as the device displacement increases. A nonlinear response simulation was carried out using a single-degree-of-freedom system model under various input motions. The results showed that the VFD was effective for controlling the response of the RC structure, not only for reducing the displacement but also for mitigating the increase in the story shear force and ac-celeration. Also, the nonlinear earthquake response of a three-dimensional frame model repre-senting a historic RC temple building retrofitted with VFDs was assessed. The results showed that the VFDs clearly mitigated the peak story shear of the device-installed story, compared with a passive conventional friction device (CFD). The VFD significantly reduced the peak story drift of the device-installed story compared with the uncontrolled case. Moreover, the peak story drift at the base story for the VFD was decreased compared to the CFD. The VFD contributes to enhancing the aseismic performance of RC superstructures while suppressing the stress increase in the foundation.

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© 2022 The Authors. Published by Elsevier Ltd.

2352-7102