Seismic response control effects for reinforced-concrete buildings incorporating a passive variable friction device
Seismic response control effects for reinforced-concrete buildings incorporating a passive variable friction device
复制标题
DOI：
10.1016/j.jobe.2022.105388
复制
发表时间：
2022-10
影响因子：
6.4
通讯作者：
K. Shirai;Tomoaki Ito;M. Kikuchi
中科院分区：
文献类型：
--
作者：
K. Shirai;Tomoaki Ito;M. Kikuchi
本文对钢筋混凝土结构在地震作用下的反应特性和控制效果进行了数值研究。所考虑的阻尼器是一个被动的位移相关的可变摩擦装置（VFD），其滑动力随着装置位移的增加而减小。采用单自由度系统模型，在各种输入运动下进行了非线性响应仿真。结果表明，VFD对控制结构的反应是有效的，不仅可以减少位移，而且可以减轻层间剪力和加速度的增加。此外，非线性地震反应的三维框架模型，代表一个历史悠久的钢筋混凝土寺庙建筑与VFD改造进行了评估。结果表明，VFD明显减轻了峰值层剪力的装置安装层，相比被动的传统摩擦装置（CFD）。与无控制情况相比，VFD显著降低了装置安装层的峰值层间位移。此外，与CFD相比，VFD的底部层处的峰值层间位移减小。VFD有助于提高钢筋混凝土上部结构的抗震性能，同时抑制应力增加的基础。
The seismic response behavior and control effects of reinforced concrete (RC) structures incorporating 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 acceleration. Also, the nonlinear earthquake response of a three-dimensional frame model representing 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.