基于磁流变阻尼器与弹性基础隔震耦合建筑的地震响应分析

Seismic Response of a Coupled Building with MagnetoRheological Damper and Elastic Base Isolation

摘要:

为了减少地震时相邻建筑间相互撞击造成严重的结构损坏，运用Lyapunov法作为控制算法进行稳定性分析和控制器设计，对半主动控制以及两种混合控制方案性能进行了对比分析，经过研究发现，混合控制策略在缓解地震响应方面比半主动控制更有效。选取适当的混合控制能够减少支座位移，从而有效防止冲击。另外，通过参数学习发现增加隔震阻尼和强度会导致基础剪力增加和支座位移减小，选择适当的参数值，能够保证响应限定在一定范围内。

Abstract:

To reduce the severe structural damage caused by the collision of adjacent buildings during an earthquake, in this study, we applied the Lyapunov method as a control algorithm to conduct a stability analysis to determine the best controller design. Here, we compare and analyze the performances of semi-active and two types of hybrid control schemes. The results reveal that a hybrid control strategy is more effective than semi-active control in mitigating the seismic response. The selection of an appropriate hybrid control scheme can reduce the bearing displacement, and thus effectively prevent impact. In addition, we found that an increase in the damping and strength of the isolation leads to an increase in the base shear force and reduces the bearing displacement. The selection of an appropriate parameter value can ensure that the resulting response is within a limited range.