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摘要:为准确掌握拱座的应力分布,指导结构设计,本文以一座中承式钢管混凝土拱桥为研究对象,针对中承式拱桥的特点,在建立全桥midas/civil整体性分析的基础上,使用midas/fea对拱座进行局部受力分析。对比分析c20、c25、c30、c35和c40五组不同标号混凝土拱座主应力分布的变化情况,分析结果表明,在进行结构设计过程中,注重局部受力分析并使之受力明确是必要的,可以确定经济合适的混凝土等级。本文研究成果对同类桥梁及其他类型桥梁有一定的参考意义。
关键词:桥梁工程;中承式钢管混凝土拱桥;拱座;拱脚;主拉应力;主压应力
abstract: in order to master the arch foot stress distribution accurately, guiding the structural design, taking a semi-supported cfst arch as the research object, according to the characteristics of the arch bridge, based on the full-bridge midas / civil integrity analysis, using the midas/ fea analyzed the local stress of the skewback. compared with the change of stress distribution of five groups of c20, c25, c30, c35 and c40 grade concrete arch-foot, the result showed that, during the structural design process, focusing on the local stress analysis and made it clearly was necessary, could determine the economic grade of concrete. the results of this paper have some reference significances to the similar and other types of bridges.
key words: bridge engineering; semi-supported cfst arch bridge; skewback; arch-foot; principal tensile stress; pressive stress