钢管混凝土拱桥预拱度的计算与设置
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摘要
钢管混凝土拱桥在成桥后通常需要对拱肋进行成桥预拱度的计算以使其达到设计的拱轴线。为了确定最适用于钢管混凝土拱桥成桥预拱度的分配方法 ,采用大型通用有限元软件Midas/civil对拱肋成桥预拱度进行初步计算,得出精确结果后,以拱顶预拱度值为基准,运用四种预拱度分配方法对拱肋其余各截面进行预拱度的分配,最后与有限元结果进行对比分析,实践证明二次抛物线分配法求解出的预拱度最精确,为钢管混凝土拱桥预拱度的设计方法提供了参考。
After the concrete filled steel tubular arch bridge is built, it is usually necessary to calculate the pre-camber of the arch rib to reach the designed arch axis. In order to determine the distribution method that is the most suitable for the precamber of the concrete filled steel tubular arch bridge, the large-scale general finite element software Midas/civil is used to calculate the pre-camber of the arch ribs. After obtaining the accurate results, based on the pre-camber value of the vault, four pre-camber distribution methods are used to distribute the pre-camber of the remaining sections of the rib. Finally, the results are compared with the finite element results. The results show that the quadratic parabolic distribution method solves the most accurate pre-camber. It provides a reference for the design method of pre-camber of concrete filled steel tubular arch bridges.
After the concrete filled steel tubular arch bridge is built, it is usually necessary to calculate the pre-camber of the arch rib to reach the designed arch axis. In order to determine the distribution method that is the most suitable for the precamber of the concrete filled steel tubular arch bridge, the large-scale general finite element software Midas/civil is used to calculate the pre-camber of the arch ribs. After obtaining the accurate results, based on the pre-camber value of the vault, four pre-camber distribution methods are used to distribute the pre-camber of the remaining sections of the rib. Finally, the results are compared with the finite element results. The results show that the quadratic parabolic distribution method solves the most accurate pre-camber. It provides a reference for the design method of pre-camber of concrete filled steel tubular arch bridges.
引文
[1]梁鹏.钢管混凝土拱桥拱肋预拱度的研究[D].武汉:武汉理工大学,2004.
[2]肖锐,宫金明.钢管混凝土拱桥预拱度的设置方法及影响因素[J].山西建筑.2010(5):316-317.
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[4]刘祖祥.钢管混凝土拱桥拱轴线线型的探讨[J].交通标准化,2003(10):72-75.
[5]段瑞芳.钢管混凝土拱桥拱肋缆索吊装施工预拱度设置研究[D].西安:长安大学,2006.
[6]孙志伟.钢管混凝土拱桥拱肋预拱度研究[D].西安:长安大学,2011.
[7]蔡泽.钢管混凝土拱桥拱肋预拱度设置与施工控制[J].现代工业经济和信息化,2015,5(11):65-67.
[8]许云山.CFST拱桥主拱肋预拱度设置方法优化研究[J].公路交通科技(应用技术版),2011,7(10):262-264.
[2]肖锐,宫金明.钢管混凝土拱桥预拱度的设置方法及影响因素[J].山西建筑.2010(5):316-317.
[3]赵义书,孙耀宗.钢管混凝土拱桥预拱度设置方法的探讨[J].国外建材科技,2007(1):67-69.
[4]刘祖祥.钢管混凝土拱桥拱轴线线型的探讨[J].交通标准化,2003(10):72-75.
[5]段瑞芳.钢管混凝土拱桥拱肋缆索吊装施工预拱度设置研究[D].西安:长安大学,2006.
[6]孙志伟.钢管混凝土拱桥拱肋预拱度研究[D].西安:长安大学,2011.
[7]蔡泽.钢管混凝土拱桥拱肋预拱度设置与施工控制[J].现代工业经济和信息化,2015,5(11):65-67.
[8]许云山.CFST拱桥主拱肋预拱度设置方法优化研究[J].公路交通科技(应用技术版),2011,7(10):262-264.