K型偏心支撑耗能梁段开孔形式对支撑滞回性能影响分析  

mpact Analysis on the Hysteretic Performance of Opening Form of Dissipation Beam of Eccentrically Supported K-type Link

作　　者：严子宁 YAN Zining(Institute of Construction Engineering Technology,Changzhou Vocational Institute of Engineering,Changzhou Jiangsu 213164 China)

机构地区：[1]常州工程职业技术学院建筑工程学院,江苏常州213164

出　　处：《江苏建筑》2023年第6期38-43,共6页Jiangsu Construction

基　　金：常州工程职业技术学院科研基金项目(11130300122004)。

摘　　要：K型偏心支撑刚度大、塑性好,在实际工程中具有较好的应用。耗能梁段开孔的偏心支撑,有效避免了腹板的面外屈曲,同时具有更好的变形能力,为了研究耗能梁段腹板的合理开孔形式,文章利用有限元软件对比分析了长圆孔、椭圆孔和菱形孔试件的滞回性能,同时研究腹板开孔长度、开孔宽度以及腹板厚度对椭圆孔试件的影响。分析结果表明:腹板开椭圆孔的K型偏心支撑变形均匀,应力大致分布整个腹板,滞回曲线饱满,水平承载力与刚度较高,耗能能力优于其它两种开孔腹板,是K型偏心支撑耗能梁段的合理开孔形式。开孔宽度对于偏心支撑滞回性能影响不大,开孔长度越短、腹板越厚,框架的水平力与刚度越大,腹板较厚的框架,后期的耗能能力也更为优秀。K-type Link has good application in practical engineering due to its large stiffness and good plasticity.The K-type link which dissipated beam have holes effectively avoids the out-of-plane buckling and has better deformation ability.In order to study the reasonable opening form of the web of the energy-dissipated beam,the hysteretic properties of the specimens with elongated holes,elliptic holes and diamond holes were compared and analyzed by the finite element software.Also,the effects of web opening length,opening width and web thickness on elliptic holes specimens are studied.The analysis result shows that the K-type link with elliptic holes in the web has uniform deformation and stress is distributed roughly throughout the web.The hysteresis curve is full,the horizontal bearing capacity and stiffness are higher,and the energy dissipation capacity is better than the other two kinds of webs with opening holes.It is a reasonable opening form of K-type Link.The opening width has little effect on the hysteretic performance of K-type Link.The shorter the opening length and the thicker the web,the greater the horizontal force and stiffness of the frame.Frames with thicker webs also have better energy dissipation capacity in later stages.

关 键 词：偏心支撑 腹板开孔 滞回性能 参数分析 

分 类 号：TU323.3[建筑科学—结构工程]