近场地震下层间隔震偏心结构的减震控制

PDF(3614 KB)

振动与冲击 ›› 2011, Vol. 30 ›› Issue (11) : 281-286.

论文

近场地震下层间隔震偏心结构的减震控制

谭平1; 殷伟希2; 张颖1

作者信息 +

Seismic control of inter-story isolated eccentric structure subjected to near-field ground motions

Tan Ping1; Ying Wei-xi2; Zhang Ying1

Author information +

文章历史 +

摘要

提出了近场地震分析模型，建立了层间隔震偏心结构平-扭耦联运动方程。基于三刚片系简化模型分析了偏心参数对层间隔震偏心结构的影响规律，定量分析了近场地震中脉冲分量对层间隔震偏心结构地震反应的作用效应。研究了在隔震层附设黏滞阻尼器的参数优化规律并对某典型算例进行了仿真分析。结果表明，在层间隔震体系隔震层处设置参数合适的黏滞阻尼器可有效地控制上部结构、隔震层与下部结构结构的地震响应，减小结构的基底剪力，对改善层间隔震偏心结构的地震安全性具有非常重要的作用。

Abstract

This paper proposes a near-field ground model. Motion equation of an inter-story isolated eccentric structure is formulated. Based on three-rigid panel model of the inter-story isolated eccentric structure, influence of eccentric parameters on the inter-story isolated structure is investigated. Near-field effect on the inter-story-isolated eccentric structure is analyzed by adjusting the pulse period and proportion of pulse component. Optimization law of viscous dampers, which are installed on the isolation story, are developed in this paper. Numerical simulation is conducted to verify the control effectiveness of nonlinear viscous dampers. Results show that the optimal viscous damper can reduce the responses of the substructure, isolation level and superstructure of the inter-story isolation system significantly and greatly enhance the safety of inter-story isolated eccentric structure subjected to near-field ground motions.

导出引用

谭平;殷伟希;张颖 . 近场地震下层间隔震偏心结构的减震控制[J]. 振动与冲击, 2011, 30(11): 281-286

Tan Ping;Ying Wei-xi;Zhang Ying. Seismic control of inter-story isolated eccentric structure subjected to near-field ground motions[J]. Journal of Vibration and Shock, 2011, 30(11): 281-286