Design and Research of Large-span Curved Variable Height Steel Truss Pedestrian Overpass
Taking a large-span curved variable height steel truss pedestrian bridge as the design background,a spatial finite element model is established to compare and analyze the steel truss,equal height steel truss and steel pipe truss after the removal of vertical bars.The conclusion is that when the spacing between sections is small,the impact of vertical bars on the overall vertical stiffness is less than that on the overall structural quality,and the removal of vertical bars can increase the natural frequency of the structure.The arc-shaped steel truss can lead to a decrease in overall vertical stiffness.Under the conventional conditions,the equal height trusses should be selected to reduce the height of the truss and save the steel consumption.The steel pipe truss can better play the material characteristics and play the larger cross-sectional characteristics than the box truss,which can reduce the steel consumption and welding workload.The research results can provide some reference for similar pedestrian overpasses in the future.
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