不规则体型高层钢结构模拟地震振动台试验研究  

Shaking table test of a high-rise steel structure model with irregular type

作　　者：张举兵[1] 牟在根[1] 孙杰[1,2] 邓新穗[3] 赵鹏飞[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国建筑科学研究院,北京100013 [3]广州市市政工程设计研究院,广州510060

出　　处：《北京科技大学学报》2008年第11期1230-1235,共6页Journal of University of Science and Technology Beijing

基　　金：北京自然科学基金资助项目(No.8082017);北京市重点实验室开放基金资助项目

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.In order to study the aseismie 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 E1 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 di- rectional 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.

关 键 词：高层钢结构 振动台试验 地震反应 阻尼比 不规则体型 

分 类 号：TU317.1[建筑科学—结构工程]