In order to study the creep effect of concrete-filled steel tube tied arch bridge, taking 1-128 m concrete-filled steel tube arch bridge as an example, a three-dimensional finite element calculation model was established. According to the creep model of concrete-filled steel tube under the action of steel content, core concrete strength and temperature proposed by Jung Ling Chang, the influence of creep on the long-term deformation and internal force of concrete-filled steel tube tied arch bridge was analyzed. The results show that the arch rib creep will cause the arch rib and tie beam of the concrete-filled steel tube tie arch bridge to produce flexural deformation, and the arch rib stress will redistribute, resulting in the arch rib stress increasing and the core concrete stress decreasing. The stress redistribution of arch rib, girder and arch rib caused by the creep of arch rib under the consideration of temperature is greater than that without the consideration of temperature. The influence of temperature on creep should be considered in bridge design, construction monitoring and later use stage, so as to reasonably predict long-term creep deformation and stress redistribution during operation stage.

concrete-filled steel tube  /  creep  /  temperature  /  steel content