【摘要】 在建筑结构中较小的层间位移常限制阻尼器性能的充分发挥，为改善此问题，研究一种新型肘节式支撑阻尼器系统。针对一栋12层钢筋混凝土框架结构，建立四种工况模型:未安装阻尼器、安装人字形支撑阻尼器、安装剪刀型支撑阻尼器以及安装肘节式支撑阻尼器系统。采用有限元方法建模，并选取两组分别对应基本烈度和罕遇烈度水准的地震动记录，对各工况模型进行弹塑性时程分析。分析结果表明:安装阻尼器后，结构的层间位移角、楼层最大位移、楼层最大剪力及楼层最大加速度均有不同程度降低，其中对位移的控制效果优于对加速度的控制;肘节式支撑阻尼器系统对结构的减震控制效果最佳;其余阻尼器布置方式的结构减震控制效果从优到劣依次为剪刀型支撑阻尼器结构、人字型支撑阻尼器结构、无阻尼器结构。更多还原

【Abstract】 In building structures,small inter-story drifts often restrict the full exertion of damper performance. To address this issue,a new elbow-type braced damper system is studied. For a 12-story reinforced concrete( RC) frame structure,four working condition models are established: without dampers,with chevron braced dampers,with scissors-type braced dampers,and with the toggle-braced damper system. The finite element method is used for modeling,and two sets of ground motion records corresponding to basic intensity and rare intensity seismic levels,respectively,are selected to conduct elastic-plastic time-history analysis on the models under each working condition. The analysis results show that after installing dampers,the inter-story drift ratio,maximum story displacement,maximum story shear force,and maximum story acceleration of the structure all decrease to varying degrees,and the control effect on displacement is better than that on story acceleration. The toggle-braced damper system achieves the best vibration reduction control effect on the structure. The vibration reduction control effects of the structures with other configurations,in descending order of effectiveness,are structures with scissors-type braced dampers,structures with chevron braced dampers,and structures without dampers,respectively.更多还原