Research Of The Inner Force Of Rigid-Frame Tied Arch Bridge Taking Displacement Of Arch-Pier Connection Into Account

For rigid—frame tied arch bridge reducing the requirement of foundation, the applicable range of arch bridge is expanded from mountain area to plain area and cities. The development of this type bridge is aimed at long-span and light-weight. At present time, the trinity study ( arch, pier and tie-bar) of this type bridge is insufficient, so the study has great significance.By changing rigid—frame tied arch bridge into multiple arch bridge, this paper analyzes the relationship of the displacement of arch-pier connection and inner force of arch, pier and tie-bar with the theory of multiple arch, and gets the influence lines of rigid—frame tied arch bridge. Comparing with numerical value of finite-element method, this paper demonstrates the reasonableness of assumptions, and studies the influence of trinity relationship take stiffness ration of arch, pier and tie-bar into account . For multiple arch calculation applying schedule method, rigid—frame tied arch can be calculated by look-up table also, this makes it easy to practical apply in engineering.Base on finite element analytical software (ANSYS), this paper puts forward a bridge modeling technology using array method which directs toward the model analysis of construction process, and simplify simulate the interaction relationship of arch , pier and tie-bar, this paper preliminary studies the control of stretching tie-bar in construction process and generalizes the principle and optimization of stretching tie-bar.The research has been applied in project item, and gets good effect.