Space truss light steel walking bridge connected through disc nodes and construction method thereof

Abstract

The invention discloses a space truss light steel walking bridge connected through disc nodes and a construction method thereof. The space truss light steel walking bridge comprises a footpath structure and handrail structures. The handrail structures are arranged on the two sides of the upper portion of the footpath structure, and the footpath structure is formed by arranging a plurality of trussstructures. Each truss structure is a cubic or cuboid structure composed of twelve rod pieces, eight vertexes are each connected with an inclined rod, and the eight inclined rods are connected at thecenter of the truss structure. And the rod pieces, the rod pieces and the inclined rods, and the inclined rods are connected through the disc nodes. By the adoption of the space truss structure, vertical and lateral bidirectional overall rigidity is improved, a problem of instability outside a pressed surface of each handrail structure is solved, the rod pieces are evenly stressed, the rod piecesare connected through the disc nodes, and the strength of the nodes is effectively improved. 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 space grid light steel pedestrian bridge connected by disc nodes 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 allo...

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

(4) The connection strength of the nodes is weak, and uneven distribution of stiffness and uneven utilization of materials are prone to occur along the length direction of the bridge

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