Study on Mechanical Properties of Simply Supported Girder Bridge after Jointless

Abstract The jointless bridges includes integral bridges, semi-integral and extended deck bridges. adopts an abutment, its main girder, abutment pile under are fixed together to bear the force together. expansion joint device cancelled, integrity, durability driving comfort of bridge improved. In this paper, a simply supported girder in Fujian Province China is taken as research background, it transformed into bridge. Midas/Civil software used establish finite element models original bridge, mechanical properties combined action dead load overall temperature rise 25 °C analyzed. results show that due consolidation internal at end greater than beam deformation significant combination load. With increase height-to-thickness ratio bending moment mid-span increasing. Different has little influence on horizontal displacement decreases. flexible with large can improve achieve purpose protecting pile.