Abstract:Based on an engineering case, the stress state of a concrete-filled steel tube arch bridge after reinforcement and reconstruction is analyzed. the analysis shows that the stress state of this bridge after reinforced meets the standard requirements, but its safety reserves are insufficient, which should be paid more attention. At the same time, on the basis of the static analysis, the stability and the dynamic performance of this bridge are analyzed. The analysis result shows that the whole stability of the bridge is relatively good.