摘要
为避免在多高层钢结构建筑中柱凸出填充墙,提出了设置约束拉杆的截面高宽比为3.0的壁式钢管混凝土柱,通过2个带约束拉杆壁式钢管混凝土柱足尺试件的拟静力试验,研究其抗震性能。试验结果表明:约束拉杆可以有效抑制两侧柱壁局部屈曲;试件破坏模式为柱底四周钢板受压鼓曲、钢板间纵向焊缝撕裂;滞回曲线较为饱满,无明显的捏拢现象;屈服位移角在1/147 rad~1/121 rad,极限位移角在1/51 rad~1/41 rad,位移延性系数在2.61~3.11,承载力退化系数在0.86~1.04,破坏时的等效粘滞阻尼系数在0.3以上。在试验研究的基础上,建立了该类试件的精细化有限元模型,对比可知有限元结果与试验结果吻合较好,验证了模型的正确性,可为此类构件的数值模拟提供参考。研究成果丰富了矩形钢管混凝土组合构件的类型,促进装配式钢结构建筑的发展。
To avoid column protruding from the infill wall in multi-story steel structure buildings,a walled concrete-filled steel tube column with binding bars and with a section height-to-width ratio of 3.0 is proposed.To study the seismic behavior of the walled concrete-filled steel tubular column with binding bars(WCFT-B Column),the quasi-static experiments were conducted on two full-scale specimens.The test results show that:the binding bars can effectively restrain the local buckling of the column walls on both sides;the specimens fail in the local buckling of steel plates,and the longitudinal welds tear between steel plates at the bottom of the column;the hysteresis curves of the specimen are relatively plump without significant pinching effects;the yield drift ratios of the specimens vary 1/147 rad to 1/121 rad and the ultimate drift ratios are between 1/51 rad and 1/41 rad;the displacement ductility coefficient is about 2.61 to 3.11 and the bearing capacity degradation coefficients of the specimens are between 0.86 and 1.04;upon the failure of the specimens,the equivalent viscous damping coefficients are above 0.3.Based on the quasi-static experiments,the finite element(FE)model of the specimens was developed;The FE results are in a good agreement with the test ones,which verify the correctness of the FE model and provide a reference for the numerical simulation of such components.The research results enriched the types of rectangular concrete-filled steel tube composite components and promoted the development of fabricated steel structure buildings 。
作者
郝际平
黄育琪
樊春雷
薛强
HAO Ji-ping;HUANG Yu-qi;FAN Chun-lei;XUE Qiang(School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China;Key Lab of Structural Engineering and Earthquake resistance,Ministry of Education(XAUAT),Xi’an 710055,China;Prefabricated Steel Structure Research Institute Company Limited of Xi’an University of Architecture&Technology,Xi’an 710055,China)
出处
《工程力学》
EI
CSCD
北大核心
2021年第12期39-48,共10页
Engineering Mechanics
基金
国家重点研发计划项目(2017YFC0703806)。
关键词
壁式钢管混凝土柱
约束拉杆
拟静力试验
有限元分析
抗震性能
walled concrete-filled steel tubular column
binding bar
quasi-static test
finite element analysis
seismic behavior
