摘要
双曲拱桥拱上建筑结构在一定程度上要参与拱圈受力,在以往设计这类拱桥时,限于计算手段,未做空间结构分析。对于在役的双曲拱桥,为客观评定其实际承载能力,合理计算拱上建筑的联合作用,具有现实意义。该文以拉林河双曲拱桥为依托,应用MIDAS有限元分析软件,采用梁格法建立了双曲拱桥的空间计算模型,分析了在拱桥矢跨比、腹拱矢跨比一定的条件下,腹拱圈刚度、立柱刚度以及拱圈截面纵桥向的位置对联合作用的影响。
The spandrel construction structure of double-curve arch bridge will be concerned with the stress of arch ring at a certain extent.The design of this arch bridge was limited in the calculation means and the space structure was not analyzed before.It is really significant to reasonably calculate the combined action of spandrel construction in order to objectively assess the actual carrying capacity of double-curve arch bridge under service.Taking the double-curve arch bridge of Lalin River as an example,the article uses MIDAS finite element analysis software and grillage method to set up the space calculation model of double-curve arch bridge,and analyzes the influence of web arch ring rigidity,column rigidity and sectional longitudinal bridge position of arch ring on the combined action under a certain condition of rise-span ratios of arch bridge and web arch.
出处
《城市道桥与防洪》
2010年第3期123-126,共4页
Urban Roads Bridges & Flood Control
关键词
双曲拱桥
拱上建筑联合作用
梁格法
内力折减
double-curve arch bridge
spandrel construction combined action
grillage method
inner force reduction
