Composite-metal combined large-span bridge with lower chord reinforcing system

Abstract

The invention discloses a composite-metal combined large-span bridge with a lower chord reinforcing system. The bridge comprises intermediate bridge sections, edge bridge sections and the lower chordreinforcing system, wherein the intermediate bridge sections and the edge bridge sections are all in modularized design and each comprise two space trusses arranged in parallel, an aluminum alloy bridge deck slab fixed to the tops of the space trusses and a transverse connecting rod located at the bottoms of the space trusses and used for connecting the two space trusses; in the intermediate bridge sections and the edge bridge sections, fiber-reinforced resin-based pull extrusion section bars and truss structures are unitedly designed, the weight can be greatly reduced, and the use efficiencyof different materials can be brought into full play. In order to further improve the striding capacity of the bridge, a bridge body is externally reinforced through the lower chord reinforcing systembelow the bridge, so that the flexibility and quickness of emergency bridge equipment adapting to actual complex terrain tasks are improved. The combined large-span bridge is small in weight, quick and convenient to transport, assemble and erect, capable of adapting to obstacles of different spans and wide in application prospect in the emergency industry.

Description

technical field [0001] The invention relates to an emergency long-span bridge, in particular to a light-weight, high-load-bearing, long-span composite material-metal composite long-span bridge with a lower chord reinforcement system, which belongs to the engineering field. Background technique [0002] Most of the existing standard emergency bridge equipment are metal structures, including a large number of steel structures and a small number of aluminum alloy structures. Although steel has the advantages of high strength, good plasticity and toughness, uniform force in all directions, and mature design calculation theory, steel bridges have defects such as heavy weight, poor mobility, many transport vehicles, and high labor intensity, which are difficult to meet the current requirements. The ever-increasing demanding requirements of emergency support tasks. For example, the prefabricated highway steel bridge commonly used in emergency equipment is assembled from a series o...

AI Technical Summary

Problems solved by technology

Due to the large self-weight and the large number of assembled connectors, the maneuverability of the entire bridge is poor and the work tasks are large, which seriously reduces the efficiency of bridge assembly and erection, which is not conducive to the rapid guarantee of emergency repairs.

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