高强钢组合K形偏心支撑框架结构振动台试验研究  

Shake table test of high-strength steel composite K-eccentrically braced frames

作　　者：田小红[1,2] 苏明周[1] 连鸣[1] 李慎[1] 王凤[1] 

机构地区：[1]西安建筑科技大学,陕西西安710055 [2]西安理工大学,陕西西安710048

出　　处：《土木工程学报》2016年第3期56-63,共8页China Civil Engineering Journal

基　　金：国家自然科学基金(51178382)

摘　　要：为研究高强钢组合K形偏心支撑框架的抗震性能,推动高强钢在我国建筑领域的应用,对一个单跨两榀三层高强钢组合K形偏心支撑钢框架进行缩尺比例为1/2的振动台试验,得到不同工况下的自振频率、阻尼比、加速度反应、位移反应及耗能梁段的应变。研究表明:随地震波峰值加速度的增大,结构的自振频率降低,阻尼比增大,加速度反应增大,动力放大系数减小。按照动力相似关系推导出原型结构的地震反应,多遇地震作用下结构最大层间位移角为1/1667,罕遇地震作用下结构最大层间位移角为1/237,均满足抗震规范变形验算的规定。综上,高强钢组合K形偏心支撑框架具有良好的抗震性能,满足"三水准"抗震设防准则。A shaking table test of a 1 /2 scaled model was carried out to study the seismic behavior of high-strength steel composite K-eccentrically braced frames（ K-HSS-EBF） and to promote the application of high-strength steel to the construction industry of China. The experimental results of the strain of beam section with energy dissipation,natural frequency,damping ratio,acceleration response and displacement response were presented. The results show that,with the increase of peak ground acceleration,the natural frequency decreases,the damping ratio increases,the acceleration response increases,and the acceleration dynamic magnification factors decreases. The seismic response of prototype structure was deduced from model response according to the dynamic similarity relation. The maximum interstory drift of the structure was 1 /1667 in the frequent earthquakes and the maximum interstory drift was 1 /237 in the rare earthquakes,which met the demands of the seismic design code of buildings. The K-HSS-EBFs have good seismic performance and can meet the 3-level seismic design demands.

关 键 词：高强钢 偏心支撑 振动台试验 抗震性能 

分 类 号：TU392[建筑科学—结构工程] TU317.1