Constructional Monitoring And Structural Simulation Analysis Of Continuous Rigid Frame Bridge

In recent twenty years, with the fast development of prestressed concrete continues rigid frame bridge, which has a property of bond of beam and abutment, so not only maintain the advantage of comfort of continue girder, but also decrease maintenance cost because that there is no bearing of "T" beam. Continue rigid frame bridge is more and more widely used because of its high strength, lightful line type, convenient and fast construction, long-span ability.The prestressed concrete continuous rigid frame bridge often adopts the economical and reasonable segmental construction technique with cantilever installation. During the process of the balanced cantilever construction, the bridge structure is influenced by various factors, such as shrinkage, creep and temperature change of concrete, construction error, survey error, and so on. Such factors result in the complex change of the internal forces and displacements in the bridge. It is necessary to execute construction control effectively for bridge's construction, ensuring of smooth closing join at mid-span, meeting the need of design and keeping the ideal alignment after closing join.In this thesis, we base on the consruction control and monitor project of guan kou ya three bridge. In order to ensure the consistency of practical alignment of structure and ideal alignment, deflection and internal force within the allowable limit, we adopt reasonable computation to analyze the construction process in view of the practical construction of long-span continuous rigid frame bridge. The calculation of construction procedural is carried out, the analysis is made that the construction process of long span prestressed concrete continuous bridge constructed by cantilever erection method.The current finite element software DBRIDGE and MIDAS are adopted, according to the specific character of the bridge, the plane hanger finite element model is established by means of finite element method. This paper explain detailedly the concrete shrinkage, creep and temperature change mechanism, the calculation theories with methods. On the basis of these theories , the affection of the concrete shrinkage , creep and temperature change on the construction supervision is analyzed particularly, the results had been applied on the construction supervision of guan kou ya three Bridge and have the great value to the other similar bridge type.