Parameter Analysis Of Continuous Mechanical Performance Of Steel Fiber Reinforced Concrete Deck

Simply-supported concrete bridges are usually equiped with simply-supported girderstructure and continuous bridge deck. But transverse cracks and damages are likely to occur atcontinuous concrete deck located at the ends of the girder, and coupled with poor maintenanceand repair. Driving condition of considerable bridge decks are very poor. Due to the diseaseof continuous concrete bridge deck in Simply-supported concrete bridge, this paper studiedthe steel-fiber reinforced concrete bridge deck and reinforcement method.With a large number of research and based on the basic principle of structural mechanics,and according to the structure characteristics of continuous concrete bridge deck inSimply-supported concrete bridge. This paper established structural mechanics analysismethod in continuous concrete deck. According to the small and medium-span concretehollow board with the standard span of10m,13m,16m and20m, concrete T-beam with thestandard span of10m、13m、16m、20m、30m and40m, and concrete box beam with thestandard span of20m,30m and40m which are simply supported and with continuousconcrete deck. This paper establish fine and3D block numerical model of continuousconcrete deck with different span, girder height and the length of steel-fiber which isdesigned particularly(5,25~200cm, with increment of25cm) and the thickness of steel-fiber(8cm,10cm,12cm). This paper made analysis of the stress station of continuous concretedeck under the combination effect of second phase of dead load and live load with differentcombinations of parameters. According to the analysis, this paper provided the variationpattern of the tensile stress of steel-fiber reinforced concrete deck along with the standardspan, height of girder, the le3ngth of steel-fiber reinforced concrete deck, and put forward thesuggestions on the reasonable design length and thickness corresponding to the span andheight of girder of concrete hollow plate, concrete T-beam and concrete box girder.The conclusion of this paper is available for the design of reinforcement on the old concretesimply-supported girder bridge with middle and small span.