Study on the Spatial Stress of the Chongqing Yangtze River Bridge in China

摘要: Continuous rigid-frame bridges are usually used in building with long span and high piers. It is characterized by the consolidation between piers beams middle of bridge flexible lower part. Among all factors, curvature has most obvious influence on stress curved continuous bridge, because which, beam produces coupling effect bending moment receives complicated stress, leading to deformation such as torsion displacement radial direction. No matter it castscaffold construction or cantilever construction, for bridges, considering that after term creep concrete, structure tends be a drop-frame state, so necessary know mechanical properties finished bridge. Taking Chongqing Yangtze River Bridge an example, this paper mainly analyzes internal forces deformations continuotus establishing spatial finite element model Midas Civil 2006 software changing model’s radius curvature. The results show increases, vertical angle long-span both reduced under dead load prestressed load, presenting namely, “coupling moment”. In analyzed, transverse direction also behaves trend gradual decrease increase range 500‐2000 m.