潮洲韩江北桥斜靠拱桥稳定性分析

以韩江北桥主桥主跨斜靠式钢管混凝土拱桥为研究对象,采用ANSYS有限元程序,建立了该拱桥的空间有限元计算模型,分12种工况计算了该桥的稳定安全系数,并对桥梁的失稳特征进行了分析。计算结果表明,外拱拱脚加宽对桥梁的稳定性影响程度最大,稳定系数明显提高,其他情况对桥梁稳定系数的影响都不明显。文章计算结果已用来评估该桥初步设计方案的合理性,为该方案修改提供了参考。

Stability Analysis of the Chaozhou Hanjiang River Northen Double X-shape Arch Bridge

The main span of the main bridge,the Hanjiang River Northen Bridge,is double X-shape concrete filled steel tubular arch bridge. By adopting ANSYS finite element procedure,the authors set up the space finite element calculating model of the arch bridge,based on 12 operating mode to calculate steady safety factor of the bridge,and to analyse the unstable characteristic.The result indicates that widening the near-side arch foot would have greatest impact on the bridge stability,with obvious increase of the bridge stability coefficient and the other factors have no obvious impact.The result has already been used for assessing the rationality of preliminary design plan of this bridge and has offered reference for the modification of the preliminary design plan of this bridge.