Abstract:

For the analysis of structural performance on friction of bearing of the bridge, this paper adopts different longitudinal restraint conditions simulating longitudinal friction of bearing by setting different longitudinal rigidity, in different conditions of dead load and live load, such as the internal force of the control section of the main beam and the bottom of the bridge tower, thelongitudinal displacement of the top of the bridge tower, and the cable-stayed cable force. The changing rule of bridge stress performance under different longitudinal restraint conditions was summerized. Then, according to the result of the bridge’s loading test, the relatively reasonable longitudinal restraint conditions of this bridge were determined. Finally, according to the actual situation of this bridge bearing,  the question that needed to be paid attention to whenwe design this type bearing was proposed. This research can provide technical reference for calculation and analysis of  a bridge by  using the type of bearing.

Key words: the third bridge of Jinan Yellow River, friction of bearing, longitudinal restraint conditions, stress performance