摘要
针对地震时周期比超限偏心结构的扭转破坏具有突发性的问题,为了研究粘滞阻尼器和普通工字型钢支撑对周期比超限偏心结构扭转耦联振动的控制效果,通过理论分析和有限元数值计算,对比分析了粘滞阻尼器及普通工字型钢支撑共同控制地震作用下不规则建筑结构的自振特性、层间位移、层间位移角、层间扭转角及其内力变化等动力响应。结果表明:设置粘滞阻尼器控制结构,层间位移角最大降低21%,顶层位移峰值最大降低32%,加速度峰值最大降低28%,扭转角最大降低31%;设置粘滞阻尼器与普通钢支撑联合控制后,层间位移角最大降低26%,顶层位移峰值最大降低41%,加速度峰值最大降低38%,扭转角最大降低45%,说明粘滞阻尼器与普通钢支撑结合对偏心结构的控制效果好于粘滞阻尼器控制结构。
Aiming at the paroxysmal destruction of eccentric structures caused by torsion under the action of earthquake, in order to analyze the vibration control effect of viscous damper and steel sup- port on the lateral-torsion response of eccentric structures, based on theoretical analysis and numeri- cal calculation, the free vibration characteristics, interlayer displacement, interlayer displacement angle, interlayer torsion angle and internal force change of the irregular structures were comparative- ly analyzed. The results indicated that the control structure with viscous dampers reduced the maxi- mum value of some parameters of which the interlayer displacement angle was reduced by 21% , the topmost story displacement was reduced by 32% , the interlayer acceleration was reduced by 28% , and the interlayer torsion angle was reduced by 31%. Combined with the ordinary steel support, the interlayer displacement angle was reduced by 26% , the topmost story displacement was reduced by 41% , the acceleration was reduced by 38% , the interlayer torsion angle was reduced by 45% , showing that the control effect of viscous dampers and steel supports on eccentric structures is better than that of the viscous dampers only.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2013年第4期991-995,共5页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金资助项目(51008148,51274111)
关键词
偏心结构
粘滞阻尼器
周期比
平扭耦联反应
eccentric structure
viscous damper
cycle ratio
even translation-torsion coupling re- action
