Analysis Of Continuous Beam Bridge Constructed From Simple Supported Structure System

In recent years, highway has gotten an unprecedented development in our country. The features of highway are fast, safe and comfortable. In order to provide fastly reposeful and comfortable driving condition, high quality bridges are required among the high qualities,are better continuous performance and less expansion joints etc, therefore, medium-small span bridges get more attension construction in construction highway of bridges. Because the continuous beam bridges constructed form simply supported girders combines the advantages of the continuous beam bridges as well as the precast beams'batch production, it has gotten wide application and development.The following four aspects on simple-supported-continuous girder bridge are introducedj in this thesis:1) Overview of development and reseach status of simple-supported-continuous system are emphasized, and the advantages and disadvantages are summarized, and the system theory and methods are introduced.2) Aimed at the 5×25m continuous beam bridges with single or double bearings constructed form simply supported girders, the deformation and inter force and stress in main sections, under the actions of dead load and dead load+live load and dead load+live load+additional load, are discussed with bridge special analysis program, to seek for 5×25m continuous beam bridges constructed form simply supported girders'bearings.3) The 5×25m continuous beam bridges constructed form simply supported girders of the concrete pouring sequence of continuous ends and the applying sequence of pretensioned force and the removal of the temporary supports are discussed with bridge special analysis program. The structure of deformation and stress are analysised in every construction sequence about the advantages and disadvantages, to find out for 5×25m continuous beam bridges constructed form simply supported girders of construction sequence.4) Aimed at the 5×25m continuous beam bridges's pier top units constructed form simply supported girders, the stress of continuous ends is discussed with space finite element software-Midas civil and Plate/Shell FEM. The calculation results and bar FEM calculation results are compared.