- 摘 要
-
(1 河北工業(yè)大學(xué)土木與交通學(xué)院,天津 300401； 2 河北省土木工程技術(shù)研究中心,天津 300401；3 中土大地國際建筑設(shè)計有限公司,石家莊 050035)
摘要: 為了解決鋼結(jié)構(gòu)中鋼梁下翼緣焊縫根部易發(fā)生脆性斷裂的問題，提出一種兼有外環(huán)板和貫通隔板的新型栓焊混合裝配方鋼管混凝土柱-H 鋼梁連接節(jié)點。采用有限元 ABAQUS 對其進(jìn)行數(shù)值模擬，研究該節(jié)點的傳力機理、屈服機制、破壞模態(tài)和耗能性能。通過有限元參數(shù)分析，深入研究軸壓比、寬厚比以及外環(huán)板厚度對節(jié)點抗震性能的影響。結(jié)果表明:節(jié)點呈現(xiàn)典型彎曲破壞模式，塑性鉸發(fā)生在梁上翼緣與外環(huán)板連接處，節(jié)點屈服始于翼緣塑性鉸區(qū)，經(jīng)由翼緣擴展至腹板，繼而鋼管混凝土柱屈曲，最終上翼緣焊縫斷裂破壞，且節(jié)點表現(xiàn)出良好的轉(zhuǎn)動性能；增大鋼管寬厚比和外環(huán)板厚度均可提高節(jié)點承載力，建議鋼管寬厚比取值為 35 ~ 45，鋼梁翼緣與外環(huán)板厚度及鋼材強度一致。
關(guān)鍵詞: 上環(huán)下貫裝配式節(jié)點； 下栓上焊混合連接； 抗震性能； 屈服機制
中圖分類號:TU391 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2022)19-0118-06
DOI:10.19701 / j.jzjg.LS220162
Numerical simulation on seismic performance of concrete-filled square steel tubecolumn-H-steel beam bolt-welded hybrid joints with upper annular plate andlower through-diaphragm connection
SHI Xiaona1,RONG Xian1，2,HAO Guiqiang3,ZHANG Jianxin1，2
(1 School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China；2 Civil Engineering Technology Research Center of Hebei Province,Tianjin 300401,China； 3 Zhongtu InternationalArchitectural Design Co. ,Ltd. ,Shijiazhuang 050035,China)
Abstract: To solve brittle fracture at the welding root of the lower steel beam flange in steel structure,a new type ofconcrete-filled square steel tube column-H-steel beam bolt-welded hybrid joints with upper annular plate and lowerthrough-diaphragm connection was proposed. Finite element ABAQUS was used for numerical simulation to study the forcetransfer mechanism,yield mechanism,failure mode and energy dissipation performance of this joint. The effects of axialcompression ratio,width to thickness ratio and thickness of outer annular plate on the seismic performance of joints wereanalyzed by finite element parameter analysis. The results show that the joints exhibited a typical bending failure mode. Theplastic hinge occurred between the upper flange and the outer annular plate. The joint yielded at the plastic hinge area ofthe flange extending to the web through the flange,the concrete-filled square steel tube column buckled,and the weldingfractured at the upper flange. The joints shows good rotational performance. The bearing capacity could be improved byincreasing the width to thickness ratio of steel tube column and thickness of outer annular plate. It is suggested that thewidth to thickness ratio of steel tube column should be 35~ 45,and the steel beam flange has the same thickness and steelstrength with outer annular plate.
Keywords:upper annular plate and lower through-diaphragm precast joint； bottom bolted top welded hybrid connection；seismic performance； yield mechanism
∗河北省自然科學(xué)基金(E2017202278)，天津市自然科學(xué)基金(20JCZDJC00370)。
第一作者:石曉娜，博士研究生，正高級工程師，主要從事防災(zāi)減災(zāi)、結(jié)構(gòu)抗震方向的研究與工程實踐工作，Email: andysna@163. com。
[引用本文] 石曉娜，戎賢，郝貴強，等. 方鋼管混凝土柱-H 鋼梁上環(huán)下貫栓焊混合節(jié)點抗震性能數(shù)值模擬[ J]. 建筑結(jié)構(gòu),2022,52 ( 19): 118-123. SHI Xiaona,RONG Xian,HAO Guiqiang,et al. Numerical simulation on seismicperformance of concrete-filled square steel tube column-H-steel beam bolt-welded hybrid joints with upper annular plate andlower through-diaphragm connection[J]. Building Structure，2022，52(19):118-123.
