Control effect analysis for arch auxiliary system on long term deflection of long span prestressed concrete continuous beam bridge

Key Laboratory for Bridge and Tunnel of Shannxi Province, Chang’an University, Xi’an, PR China

^* 2019121003@chd.edu.cn

Abstract

In order to explore the control effect of arch assisted system on long-term deflection of long-span PC continuous girder bridge, an evaluation framework of long-term deflection control effect is proposed. Firstly, the functional relationship between long-term deflection and structural parameters is fitted based on the measured data, and the deflection prediction model is established; Secondly, based on the calculation method of bending stiffness of inversion theory, the evaluation framework of long-term deflection control effect based on the analogy stiffness method is proposed; Finally, based on the engineering example, under the premise of equal load sharing ratio, the above frame is applied to carry out parameter analysis. The results show that the deflection prediction model based on the measured data has good correlation, and the established evaluation framework can quantitatively evaluate the control effect of arch auxiliary system on long-term deflection.