| The prestressed concrete continuous rigid frame bridge is widely used because of its high strength,lightful line type,convenient and fast construction,long-span ability. In the process of construction and working , the bridge structure is influenced by various factors,such as shrinkage,creep , temperature change of concrete,design parameter and actual difference,construction error,survey error,and so on.All the factors must result in very complicated change of the internal forces and displacements in the bridge. And during the cantilever construction of the prestressed concrete continuous rigid frame bridge,the beam axis shape of formed blocks can't be regulated during the subsequent constructions.To ensure the successful closure of the bridge,and make sure that the axis shape and the internal force of the bridge accord with the design request,dynamic construction control is of great importance during the bridge construction.On the basis of practical project,this thesis carried on some key researches on the pc continuous rigid frame bridge's simulation of foundation , designing parameters sensitivity , applications of gray theory , template adjustment of difference in temperature ,control of unbalanced weight, jacking force of closure and so on. By analyzing and contrasting models of Midas ,we can conclude that the specific value of pier and foundation's flexility is the domination factor on foundation simulation. We can adjust systematic error by parametric and forecast random error including constrution error and survey error by gray theroy .This method is proved of practical value. The method of relative coordinates adjustment of template successfully resolves conflicts on template adjustment time and construction schedule. Control of unbalanced weight and research of closure jacking force can help to enhance the level of construction control and ensure the qulity of bridge.These researches serve the needs of continuous rigid frame bridge construction control and have certain application value. |
