Design and Analysis of Large-span Spatial Oblique Symmetrical Link Arch Bridge
The Xiaohe River Bridge on Dayun Road is the first large-span spatial oblique symmetrical link arch bridge in the world.Its layout of bridge span is(65+110+110+65)m=350 m.Its main arch and secondary arch are connected through the cross beam,and are formed the arch-beam consolidation with the main girder.The mechanical characteristics of the spatial oblique symmetrical link arch bridge are translated into an arch beam composite system with the self-balancing structure and without the horizontal thrust.The parabolic arch axis and box section are adopted for the arch ribs of the bridge.The inclined-span main arch span of 229 m is the largest span in China.The main girder is the semi-closed double-side steel box girder.The overall analysis of spatial static force,fatigue,stability and seismic performance of the bridge is conducted,as well as a local analysis of the arch foot.The results all meet the specification requirements.
arch bridgeoblique symmetrical link archinclined-span main archcamber secondary archarch beam compositionbridge design
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