| With the development of concrete filled steel tubular technology, which has been widely used in arch bridge. Because concrete filled steel tube structure is characteristic of high compressive performance, bearing capacity and easy construction. Concrete filled steel tubular successfully helps us to solve the problem of material strength and the construction difficult. Because concrete filled steel tube arch bridge with advantages of light self-weight and modeling beautiful. This type of bridge is applied to more and more the city bridge. What is more, it has become an icon of city’s architectural ambitions. Therefore, the research for concrete filled steel tube becomes more and more important.This paper takes steel concrete tubular tie-bar arch bridge as the background project. During the course of construction, concrete pouring construction, construct line-type control, shrinkage and creep effects of concrete filled steel tube arch bridge is researched. The suspender tension sequence would optimize. The thesis makes an analysis from the following four aspects:i. Using of software ANSYS to analysis steel tube concrete pouring process, it helps us understand pouring concrete section of stress, also find reasonable process of pouring concrete.ii. Establish different concrete filled steel tube arch finite element model, then using beam-bar model is compared with not using beam-bar mode. Finally, respectively obtain pumping concrete design pressure value.iii. Long-March bridge’s finite element model is established by using of software MIDAS, and then simulate construction procedure, analysis the results of static characteristic calculation. The suspender tension sequence would optimize.iv. Shrinkage and creep characteristics of concrete filled steel tube arch bridge were studied. The effect of shrinkage and creep on arch bridge was analyzed. General principles of arch bridge’s the inner force, stress and deflection under effect of shrinkage and creep is obtained. |
