北京工业大学学报
北京工業大學學報
북경공업대학학보
JOURNAL OF BEIJING POLYTECHNIC UNIVERSITY
2015年
6期
880-889
,共10页
刘学春%张爱林%黄欢%叶全喜%周湘江%谭永强
劉學春%張愛林%黃歡%葉全喜%週湘江%譚永彊
류학춘%장애림%황환%협전희%주상강%담영강
装配式钢结构%斜支撑节点钢框架%极限承载力%延性性能%破坏模式
裝配式鋼結構%斜支撐節點鋼框架%極限承載力%延性性能%破壞模式
장배식강결구%사지탱절점강광가%겁한승재력%연성성능%파배모식
prefabricated steel structure%lean-brace joint frame%ultimate bearing capacity%ductility%failure model
为了获得模块化装配式斜支撑节点钢框架结构中框架体系的受力性能、破坏模式及破坏机理,对4个原尺寸的一层两跨单榀框架进行了水平和竖向静力加载试验,研究了装配式斜支撑节点钢框架的承载能力、变形特性、传力机理、破坏形态和机理。通过不同斜撑布置和构件截面尺寸框架的受力性能对比分析,获得了影响其极限承载能力的规律。进行了4个一层两跨单榀框架的实体非线性有限元静力分析,并与试验结果对比。研究结果表明:装配式斜支撑节点钢框架抗侧刚度大,延性性能较好,抵抗水平荷载能力强;结构塑性变形均发生在桁架梁和斜支撑上,符合“强柱弱梁”的抗震设计原则;斜撑对抵抗水平荷载和变形至关重要;与桁架梁交汇处是斜支撑受力薄弱的区域,斜支撑槽形截面开口处最先屈服,但屈服后塑性变形没有进一步发展,斜支撑槽形截面的腹板受力较小。
為瞭穫得模塊化裝配式斜支撐節點鋼框架結構中框架體繫的受力性能、破壞模式及破壞機理,對4箇原呎吋的一層兩跨單榀框架進行瞭水平和豎嚮靜力加載試驗,研究瞭裝配式斜支撐節點鋼框架的承載能力、變形特性、傳力機理、破壞形態和機理。通過不同斜撐佈置和構件截麵呎吋框架的受力性能對比分析,穫得瞭影響其極限承載能力的規律。進行瞭4箇一層兩跨單榀框架的實體非線性有限元靜力分析,併與試驗結果對比。研究結果錶明:裝配式斜支撐節點鋼框架抗側剛度大,延性性能較好,牴抗水平荷載能力彊;結構塑性變形均髮生在桁架樑和斜支撐上,符閤“彊柱弱樑”的抗震設計原則;斜撐對牴抗水平荷載和變形至關重要;與桁架樑交彙處是斜支撐受力薄弱的區域,斜支撐槽形截麵開口處最先屈服,但屈服後塑性變形沒有進一步髮展,斜支撐槽形截麵的腹闆受力較小。
위료획득모괴화장배식사지탱절점강광가결구중광가체계적수력성능、파배모식급파배궤리,대4개원척촌적일층량과단품광가진행료수평화수향정력가재시험,연구료장배식사지탱절점강광가적승재능력、변형특성、전력궤리、파배형태화궤리。통과불동사탱포치화구건절면척촌광가적수력성능대비분석,획득료영향기겁한승재능력적규률。진행료4개일층량과단품광가적실체비선성유한원정력분석,병여시험결과대비。연구결과표명:장배식사지탱절점강광가항측강도대,연성성능교호,저항수평하재능력강;결구소성변형균발생재항가량화사지탱상,부합“강주약량”적항진설계원칙;사탱대저항수평하재화변형지관중요;여항가량교회처시사지탱수력박약적구역,사지탱조형절면개구처최선굴복,단굴복후소성변형몰유진일보발전,사지탱조형절면적복판수력교소。
To get the mechanical characteristics, failure mode and mechanism, the horizontal and vertical loading tests were performed on 4 full-size one-layer and two-span frames. Its mechanical characteristics, load-bearing capacity, deformation characteristics, failure model and mechanics were studied in the paper. The influence regulation of ultimate bearing capacity was obtained by contrasting analysis with frames having different thickness of components and different layout of lean braces. The finite element models of 4 full-size frames were analyzed, and the results were compared with those of model tests. Results show that the prefabricated steel frames have large lateral stiffness, good ductility, strong ability to resist horizontal load. And plastic deformations only occur on the truss beams and lean braces, which meets the seismic design principle of “strong column and weak beam”. The lean braces play significant roles for resisting horizontal loads and deformation. The junction area between lean brace and truss beam is the weak area, and the top point on flange of channel's cross section of lean brace yields firstly, but the plastic strain does not further develop, and the stress on the web of the cross section is relatively small.