- 摘 要
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陳麗華1 婁 宇2 李培彬2 李愛群3
（1 合肥工業(yè)大學(xué)土木建筑學(xué)院 合肥 230009； 2 中國電子工程設(shè)計院 北京 100840； 3 東南大學(xué) 南京 210096）[摘要] 為探討外包鋼-混凝土組合梁在負彎矩作用下的工作性能，對兩根外包鋼-混凝土連續(xù)梁試件進行了靜力加載試驗研究。試驗結(jié)果表明：外包鋼-混凝土組合梁負彎矩區(qū)鋼筋和外包鋼梁通過抗剪連接措施能有效地共同工作，整體工作性能良好。配筋率是影響梁塑性轉(zhuǎn)動能力和彎矩重分布程度的一個重要參數(shù)。通過控制配筋率，在承載能力極限狀態(tài)，外包鋼-混凝土組合梁在負彎矩及正彎矩最大截面的塑性變形均充分發(fā)展，具有較好的轉(zhuǎn)動能力和延性，能夠保證連續(xù)梁形成充分的塑性內(nèi)力重分布。
[關(guān)鍵詞] 外包鋼-混凝土組合梁；連續(xù)梁；配筋率；內(nèi)力重分布Experimental Research on the Internal Moment Redistribution of
Outer-plated Steel-concrete Continuous Composite Beams
Chen Lihua1, Lou Yu2, Li Peibin2, Li Aiqun3
(1 College of Civil and Arch Eng, Hefei University of Technology, Hefei 230009, China; 2 China Electronics Engineering Design Institute, Beijing 100840, China; 3 College of Civil Eng, Southeast University, Nanjing 210096, China)Abstract: The outerplated steel-concrete composite beam is a new type of coruposite beam. To evaluate its perfonuance under negative bending ruoment, static load tests of two beams were conducted. Test results indicated that effective cooperation could be achieved by the shear resistant connection between the reinforcement iIl the negative moment area and the outer plated steel beam, thus favorable entire performance could be achieved. The reinforcement ratio of the steel bars is a main parameter which affects the degree of rotation capability and moment redistribution of plastic hinge. At the loacFbearing limiting state, plastic strain on sections of both the negative and positive ruaxuuLuu ruoruent got fully developed by controlling the parameter of reinforcement ratio, and the continuous composite beams have sufficient plastic rotation ability and ductility to develop full moment redistribution.
Keywords: outer-plated steel-concrete coruposite beam; continuous beam; reinforceruent ratio; moment redistribution
