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(1 北京工業(yè)大學(xué)城市建設(shè)學(xué)部, 北京 100124; 2 河北省建筑科學(xué)研究院有限公司, 石家莊 050021)
摘要: 研發(fā)了裝配式 π 形連接件和雙 L 形帶斜向加勁肋連接件輕鋼框架梁柱節(jié)點,進(jìn)行了 10 個足尺輕鋼框架梁柱節(jié)點的低周反復(fù)荷載試驗,包括 7 個 π 形連接件節(jié)點、2 個雙 L 形帶斜向加勁肋連接件節(jié)點以及 1 個普通 H 型鋼梁腹板栓接、翼緣焊接節(jié)點。 設(shè)計參數(shù)包括節(jié)點構(gòu)造,π 肢長度以及框架柱的截面類型,比較了不同節(jié)點的破壞形態(tài)、滯回特性、承載力、剛度退化、耗能能力及應(yīng)變特征。 結(jié)果表明:π 形連接件節(jié)點與普通 H 型鋼梁腹板栓接、翼緣焊接節(jié)點相比,初始剛度和承載力顯著提高;π 形連接件節(jié)點與雙 L 形帶斜向加勁肋連接件節(jié)點相比,初始剛度和承載力明顯提高;增大 π 肢長度可提高節(jié)點初始剛度及承載力;鋼管混凝土柱節(jié)點比鋼管柱節(jié)點的剛度及耗能能力明顯提高;H 型鋼柱節(jié)點剛度低于鋼管混凝土柱節(jié)點。 π 形連接件節(jié)點和雙 L 形帶斜向加勁肋連接件節(jié)點構(gòu)造簡單、便于裝配、抗震性能優(yōu)越,可用于低多層裝配式輕鋼框架結(jié)構(gòu),其設(shè)計思路也可用于其他裝配式鋼框架結(jié)構(gòu)。
關(guān)鍵詞: 裝配式輕鋼框架; π 形連接件; 雙 L 形帶斜向加勁肋連接件; 梁柱節(jié)點; 抗震性能
中圖分類號:TU398 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2022)23-0046-10
DOI:10. 19701 / j. jzjg. HJZL2207
Experimental investigation on seismic behavior of prefabricated lightweight steel composite structure beam-column joints
CAO Wanlin1, YANG Zhaoyuan1, ZHAO Shiyong2
(1 Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing100124, China; 2 Hebei Academy of Building Research Co. , Ltd. , Shijiazhuang 050021, China)
Abstract: The prefabricated π-shaped connectors and double L-band oblique stiffening rib connector lightweight steelcomposite structure beam-column joints have been developed. The low-week repeated load tests of ten full scaleprefabricated lightweight steel composite structure beam-column joints have been carried out, included seven jointspecimens with π-shaped connector joints, two L-band oblique stiffening rib connector joints, and one ordinary H-shapedsteel beam web bolt and flange welding joint. The experimental variables include the joint construction, length of π-shapedconnector, and the frame column section types. The failure characteristic, hysteretic property, bear capacity, stiffnessdegradation, energy dissipation and strain characteristics of different joints were analyzed. The results show that the initialstiffness and bearing capacity of π-shaped connector joints are significantly higher than those of H-shaped steel beam webbolt and flange welding joint. The initial stiffness and bearing capacity of π-shaped connector joints are obviously increasedcompared with those of double L-band oblique stiffening rib connector joints. Increasing length of π-shaped connector canimprove initial stiffness and bearing capacity of joints. The stiffness and energy dissipation capacity of concrete filled steeltubular column joints are obviously higher than those of steel tubular column joints. The stiffness of H-shaped steel columnjoints is lower than the joints with concrete filled steel tubular column. The π-shaped joint and double L-band obliquestiffening rib connector joints have the advantages of simple structure, high assembly rate, and high seismic performance.The π-shaped connector joints can be used in low multi-storey prefabricated lightweight steel composite structures anddesign idea can also be used for some other prefabricated steel frame structures.
Keywords:prefabricated lightweight steel frame; π-shaped connector joint; double L-band oblique stiffening rib connectorjoint; beam-column joint; seismic performance
∗“十三五”國家重點研發(fā)計劃( 2018YFD1100903)。
第一作者:曹萬林,博士,教授,主要從事工程抗震研究,Email: wlcao@ bjut. edu. cn。
[引用本文] 曹萬林,楊兆源,趙士永. 裝配式高性能輕鋼框架梁柱節(jié)點抗震性能試驗[ J]. 建筑結(jié)構(gòu),2022,52(23 ): 46-55. CAO Wanlin, YANG Zhaoyuan, ZHAO Shiyong. Experimental investigation on seismic behavior ofprefabricated lightweight steel composite structure beam-column joints[J]. Building Structure,2022,52(23):46-55.
