摘要
实腹式高填背异形腹拱拱桥的受力具有特殊性,为研究异形腹拱及拱上填料对拱桥性能的影响,以釜溪河高填背异形腹拱拱桥为背景,利用有限元软件建立实桥模型,对各施工阶段进行受力分析,并对计算结果进行分析。结果表明:异形腹拱对主拱结构受力存在异化作用;拱上填料砌筑前、后主拱受力变化显著;墩顶、腹拱拱脚及主拱拱顶位置存在弯矩峰值,相对位移较大;拱上填料对异形腹拱异化作用的弱化效应方面有利,但在经济性方面有弊;该桥设置变形缝是必要的;该桥具有足够的承载力。
The mechanical behavior of irregular shape spandrel arch bridge with high filled arch back has specialty of its own. To study the influence of the spandrel arch and the filling materials on the arch back on the performance of the bridge, the Fuxi River Bridge of the same kind was cited as an example, the model for the actual bridge was established by the finite element software, the mechanical behavior of various construction stages of the bridge was calculated and analyzed and the results of the calculation were analyzed in further details. The results of the analysis show that the irregular shape spandrel arch has alienation action on the mechanical behavior of the main arch structure, the mechanical behavior of the main arch before and after the ma- terials are filled on the arch back varies significantly, the bending moment peak values exist in the pier tops, spandrel arch springs and main arch top and the relative displacement there is great. The filling material is advantageous to the weakening of the alienation action effect of the irregular shape spandrel, however it is not advantageous in view of economy. The setting of deformation joints on the bridge is necessary and the bridge has adequate carrying capacity.
出处
《桥梁建设》
EI
CSCD
北大核心
2011年第6期46-49,共4页
Bridge Construction
关键词
拱桥
有限元法
结构分析
arch bridge finite element method structural analysis
