ABSTRACT
It has become a trend to solve the modern complex bridge structure by computer finite element analysis of the bridge. The continuous solution region is discretized into a set of entities consisting of a finite number of elements, which are connected in some way. According to the force and structure of the actual bridge structure, different shapes of elements, materials, and connection forms are adopted to simulate. The finite element analysis method has the advantages of high efficiency, quickness, and accuracy and can solve most structural analysis problems. In this paper, the geometric nonlinear finite element model of the construction process of the single-column pier is established, and the dynamic characteristics are analyzed. The instability forms of the bridge tower in the construction process are compared and analyzed. The change law of the instability forms in the construction process of the single-column pier is summarized. The main girder's section simulation model is established using the fluid simulation software. The three-component force coefficients of the main girder are simulated and calculated. The action forms of the wind load on the main girder under different wind attack angles are summarized, which provides the calculation basis for the static wind stability, galloping, and flutter stability of the single-column pier during construction. This study reflects the stability of the single-column pier bridge to a large extent, which is of great significance to the seismic and wind resistance of the bridge structure.
