Abstract
The continuous rigid structure of prestressed concrete has been welcomed by many projects in recent years. Its structure has advantages that many other structures do not have. There was a lot of choice in engineering choices,It is suitable for the construction of large cross-diameter Bridges, and it has a lot of advantages. For example, shock effect is good,late maintenance is convenient. Because of the bridge pier and the main beam of the continuous bridge,cars will be more stable on the road. On the construction,the continuous rigid frame bridge also has the advantage of T-shaped rigid frame.
This design is (50 +2 × 75 +50) m prestressed concrete continuous rigid frame bridge design.The plane of the bridge is linear. Load rating of highway-I level. Beam cross section as a single box single room Cantilever construction method method of full support is adopted in this bridge construction. Structure calculation and analysis use Midas checking software to calculate. Including cross-section strength checking, cross-section stress checking, prestressed concrete crack test and so on.
The design of the program mainly includes the use of MADAS to establish a continuous box girder bridge model(Including dead load and live load). The internal force of the structure is analyzed and constructed by cantilever construction.
Keywords: Continuous rigid frame bridge ; prestressing force ; antilever construction- method ; finite element model ; Structural analysis ; Structural design