关键词: 简支钢管拱桥, 施工阶段, 有限元, 索力调整

Abstract: The whole construction process of a concrete filled steel tubular arch bridge was analyzed in detail and then the inner forces of critical stages were attained.The bridge is a structure which is multi-statically indeterminate inside but statically determinate outside,as a result,there will be many times of structure system transformation in the whole construction process; moreover,distribution of inner force and the line type criteria of the structure will be influenced by cable adjustment of every cable.Finally,cable adjustment was optimized using impact matrix method,in this way,distribution of inner force will be more reasonable when built up．

Key words: simply-supported steel tube arch bridge, construction stage, finite element, cable tension adjustment