Division and constraint system of the bridge deck system of long-span deck CFST arch bridges in high-intensity seismic regions
This study explores the reasonable division and constraint system of the bridge deck for deck concrete-filled steel tubular arch bridges in high-intensity seismic regions using a highway bridge with a net span of 400 meters.A nonlinear time-history analysis method was applied to compare and analyze the structural responses under various deck systems and bearing systems.The findings reveal that the bridge deck system with one continuous unit significantly reduces the displacement of the unit end and the bending moment of the juncture pier,and the bending mo-ment of columns is uniform.The shear forces at the vault section and unit end of the steel bearing system significantly increase,and the bending moments at the juncture pier and column are large and very uneven.The bending moments at the juncture pier and column of the high-damping rub-ber bearing system are significantly reduced and tend to be uniform.By using the bridge deck sys-tem with one continuous unit and the high-damping rubber bearing constraint system,the col-umn,bearing,and juncture pier have good cooperative force,and the mean value and standard deviation of internal forces for each component are significantly decreased,showing that the structural design is reasonable.
high-intensity seismic regionsdeck CFST arch bridgedivision of bridge deckingconstraint systemnonlinear time historymean value and standard deviation
万方数据
维普
