【摘要】 为研究高柱支承框架结构的抗震性能,对一V形支撑立面不规则体型高层钢框架结构进行了1/12整体模型模拟地震振动台试验,以主要结构动力特性、基底反力、柱底反力为控制目标制作模型并测试了其振型、阻尼比及其在7度多遇、7度基本、7度罕遇烈度地震作用下的加速度和位移反应.模型总高4.65m,总质量59.2t,模拟地震波采用了ElCentro波和人工波.试验中结构表现出明显的扭转效应,悬挑部分的位移反应较大;地震波三向输入时,扭转反应比单向输入时大.根据试验结果和相似理论,推导、分析了原型结构的地震反应,并对原型结构薄弱环节的抗震设计提出了建议.更多还原

【Abstract】 In order to study the aseismic performance of long-strut-braced steel frames,a shaking table test was carried out for a vertical irregular high-rise steel structure model with a total height of 4.56 m.The 59.2 t 1/12-scale model structure,which is mainly supported by V-shaped concrete-filled steel tube struts,was built to obtain the dynamic characteristics,foundation and column-end reactions.The El Centro earthquake records and artificial waves were adopted to investigate the dynamic responses.Structure acceleration and displacement responses under the excitations of seven-degree frequent,basic,and rare earthquakes were tested.As a result,the model exhibits considerable torsional effects;the displacements of protrudent parts are relatively greater.Compared with single directional excitation,the torsional responses in three-dimensional exciting conditions are more intense.Based on the similitude theory and experimental results,the seismic responses of the prototype structure were deduced and some suggestions for improving aseismic vulnerabilities were proposed.更多还原