【摘要】：為降低裝配式組合鋼箱梁橋結(jié)構(gòu)體系轉(zhuǎn)換時(shí)中支座處結(jié)合部的施工難度,提出一種鋼-混凝土結(jié)合部的構(gòu)造形式。應(yīng)用有限元分析軟件ANSYS,通過(guò)對(duì)某4跨連續(xù)梁橋的模擬計(jì)算,揭示了結(jié)合部各構(gòu)件傳力比例及鋼-混凝土界面滑移機(jī)理。進(jìn)一步變化連接件布置形式及抗剪剛度,研究不同參數(shù)對(duì)結(jié)合部受力性能的影響。結(jié)果表明,結(jié)合部通過(guò)橋面板及內(nèi)插開(kāi)孔鋼板的縱向力傳遞支點(diǎn)負(fù)彎矩,隔板焊釘及內(nèi)填充混凝土傳遞豎向支反力;隨著連接件布置方式及抗剪剛度的變化,不同參數(shù)對(duì)隔板焊釘受力影響較大,對(duì)其余構(gòu)件基本無(wú)影響;結(jié)合部混凝土絕大部分主拉應(yīng)力低于2.1 MPa,焊釘最大剪力為12.6 k N,鋼-混凝土結(jié)合面最大滑移為0.06 mm,結(jié)合部構(gòu)造形式安全、合理。
[Abstract]:In order to reduce the construction difficulty of the junction at the middle support of the assembled composite steel box girder bridge during the structural system transformation, a structural form of the steel-concrete joint is proposed. By using the finite element analysis software ANSYSand the simulation calculation of a 4-span continuous beam bridge, the force transfer ratio of each member in the joint and the slip mechanism of the steel-concrete interface are revealed. The influence of different parameters on the mechanical properties of the joint was studied by changing the joint layout and shear stiffness. The results show that the longitudinal force of the joint is transmitted by the longitudinal force of the bridge deck and the steel plate with inserted holes, and the negative bending moment is transmitted by the longitudinal force of the steel plate, and the vertical support reaction is transmitted by the welded nail and the inner filled concrete, and with the change of the arrangement of the connection and the shear stiffness, Different parameters have great influence on the force of the welded nail, but have no effect on the rest of the components. Most of the main tensile stress of the combined concrete is less than 2.1 MPA, the maximum shear force of the welded nail is 12.6kN, and the maximum slip of the steel-concrete joint is 0.06 mm. The structure of the joint is safe and reasonable.
【作者單位】： 同濟(jì)大學(xué)橋梁工程系;
【分類(lèi)號(hào)】：U441

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本文編號(hào)：2169602