移动贝雷梁柱支架空间稳定性研究

Study on Spatial Stability of Mobile Bailey Truss Structure

结合鱼洞长江大桥南引桥采用的贝雷梁柱式支架进行连续箱梁现浇的施工工艺,从贝雷梁柱式支架的受力分析入手,通过桥梁博士3.0计算得到不同工况下现浇箱梁贝雷梁柱支架的受力,然后采用ANSYS 9.0有限元分析软件建立的贝雷梁柱支架模型,对贝雷梁柱支架施工过程的空间稳定性进行了计算,得到了相关稳定系数及对应的失稳模态,最后给出了防止此类贝雷梁柱支架失稳的相关建议。

Taking the southern approach bridge of Yudong Yangtze River Bridge as the research object, which applies the cast-in-place construction technology to continuous box girder on Bailey beams stent, the stent-reaction forces under different conditions of cast-in-place box girder are obtained through Dr 3.0 bridge finite element analysis software. Then Bailey truss structure model established by ANSYS 9.0 finite element analysis software is applied to check the spatial stability in the construction of Bailey truss structure. The relevant stability coefficients and the corresponding instability modes are obtained. Eventually, relevant recommendations to prevent such instability of Bailey stent are given.