Analysis Of Structure Behavior And Construction Control Of Curved Continuous Frame Bridge

With the rapid development of scientific and industry, curved continous frame bridges have been widely used in bridge structure as they usually have small dimensions of outline, more spacious under-bridge clearance and the inherited advantage of continous beam brdige.Structure superioriry of the bridge can be omitted design of bearings placed on pier stud and temporary constraint during structure change because of the application of structural fixation between pier and girder.And difficulties of study on the bridges focus on different internal forces distribution.It is necessary that as-built bridge deflection curve satisfy design requirements while study on the bridge design and construction in combination with different boundary conditions and load cases in-site after structural optimum design by FEM.Attentioned questiones have been analysed and studied in this thesis in combination with construction control of Lushuihe large-span curved contionus frame bridge. These questiones include that bouandry condition state of consideration of side pier and without consideration of side pier,no prebuckling pier and prebuckling pier, structural calculation on the basis of whole erection process or whole bridge model at a time,along with effect on the bridge while variational temperature and curvature,etc.Factors above generally will form more internal forces and deformations.Coupling effect of bending-torsion on curved structure has been reduced means by pre-eccentric bearings and prebuckling pier,etc.Internal forces and deformations has been obtained through analysis and study of various factors effect on bridge structure in this article.The results will guide the process of construction, adjustment of formwork elevation setting with construction stage. It aims at that as-built bridge deflection curve meet the demand of design requirements by adjustment step by step.