Advantages and disadvantages of steel structure bridge

The structure of a steel bridge consists of the main bridge along its longitudinal direction. The span between the piers is called the span, the section of the main bridge spanning the main navigable hole is called the main span, and the span is the side span. The main materials used for steel structure Bridges are steel plate, section steel and high strength. The steel plate is mostly made of low alloy steel, and the parts are made of cast steel and high-quality carbon. The main types of steel beams are ribbed beams, box beams, truss beams and composite beams.

The advantage is that under vertical load, the bending moment of steel structure bridge is usually smaller than that of continuous beam or simply supported beam of the same span, and its crossing capacity is greater than that of beam bridge. The consolidation of pier and beam eliminates the need for large supports, which has strong structural integrity and good seismic performance. The bridge is beautiful, magnificent, and has large crossing capacity, which is suitable for canyon bridge and highway crossing bridge.

The disadvantage is that the steel structure of the bridge due to the use of high-strength materials, corrosion under the action of the atmosphere, easy to rust, high maintenance costs, compared with the price is more expensive.