Comparison And Analytic Research On Long Span Continuous Rigid Frame Bridges With High Pier Between The Straight And The Curved Bridges

The paper which is a part of the western communication construction scientificand technical item, "The design and construction technology study of the long spancurved bridge with high pier". In this paper, the finite element method (FEM) isused. The paper compares the superstructure's inner force and deformation of thelong span straight continuous rigid-frame bridge with high pier with that of thecurved bridge. The major contents of this paper expatiates the rule of thesuperstructure's inner force and deformation varied with plane curve radius, span andpier height. The main conclusion of this paper is the vertical deformation difference of innerside and outer side of the long span curved continuous rigid-frame bridge with highpier. Because the boundary support condition is different, the rule is differ from theprevious rule that the outer side vertical displacement is larger than the inner side ofcurved continuous bridges. The vertical displacement anamorphic rule of the longspan curved continuous rigid-frame bridge with high pier is complex. It is affected bythe span and the plane curve radius. Generally trend is summarized as follows: To theside span, the vertical displacement of the inner side is larger than the outer side. Tothe middle span, the vertical displacement of the outer side is larger than the innerside. When the central angle is increased,the torsional effect and the transversaldisplacement is obvious.