Quickly-mounted space truss large-span light steel walking bridge and construction method thereof

Abstract

The invention discloses a quickly-mounted space truss large-span light steel walking bridge and a construction method thereof. The quickly-mounted space truss large-span light steel walking bridge comprises a footpath structure and a handrail structure. The footpath structure comprises a plurality of footpath trusses arranged at intervals. The handrail structure comprises a plurality of handrail trusses, the handrail trusses are arranged on the two sides of every two adjacent footpath trusses, the handrail trusses comprise XZ plane handrail trusses and YZ plane handrail trusses, and the two XZplane handrail trusses are arranged in parallel and are perpendicular to the two YZ plane handrail trusses respectively. By the adoption of a three-dimensional space truss structure, side surface supporting of the handrail trusses is increased, sectional dimensions, perpendicular to a span direction, of the handrail structure and the footpath structure are increased, vertical rigidity and lateralrigidity are improved, and a problem that a pressed surface of the handrail structure is unstable outside is solved. The invention relates to the technical field of bridge construction.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a rapidly installed space truss long-span light steel pedestrian bridge and a construction method thereof. Background technique [0002] Modern urban construction is accompanied by essential transportation facilities. For densely populated cities, pedestrian bridges and underground passages are usually used to connect both sides of the road to facilitate pedestrian travel. Compared with the underground passages built together with road facilities, the setting of pedestrian bridges is more flexible and convenient. [0003] Traditional pedestrian bridges such as concrete bridges and steel box girder bridges have mature technologies, but the construction period is long and the unit cost is high. After completion, they will be permanent facilities, and the maintenance and replacement costs are high. In recent years, new types of pedestrian bridges represented by aluminum...

AI Technical Summary

Problems solved by technology

In recent years, new types of pedestrian bridges represented by aluminum alloy bridges have emerged in my country. These bridges have the following problems: (1) The elastic modulus of aluminum alloy is only 1 / 3 of steel, and at the same time it is expensive. In order to ensure the structural rigidity, aluminum The wall thickness of alloy components usually reaches a few centimeters thick, which goes against the trend of simpler structures

(2) The connection technology of aluminum alloy structural components is not as skilled as that of steel structures, resulting in an increase in construction costs, and at the same time, the connection reliability is not as good as that of steel structures

[0005] For the current few light steel pedestrian bridge structures, there are the following deficiencies: (1) The span is limited, and the linear stiffness of light steel components is weaker than that of traditional steel structural components. However, light steel components have the advantages of flexible layout and convenient installation. The case for optimizing the structure itself

(2) In the rare light-steel pedestrian bridges, multiple supports are used to improve the vertical stiffness of the structure, but this cannot improve the lateral stiffness of the structure, which is likely to cause insufficient lateral comfort

(3) Steel structures are prone to instability, and there is no consideration for the instability of components, especially handrail structures that are susceptible to lateral loads

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