A super-span multi-order prestressed steel truss structure and its construction method

Abstract

The invention relates to a steel truss structure, in particular to a super-large span multi-order prestressed steel truss structure and a construction method thereof, belonging to the field of steel structures. It includes a steel truss and a double-cable lower chord node fastening device, the bottoms of the two ends of the steel truss are respectively provided with universal spherical hinge nodes, and a number of continuously distributed double-cable lower chord node fastening devices are arranged below the steel truss. The steel truss and the double-cable lower chord node fastening device are positioned by V-shaped struts, and the two ends below the steel truss are respectively provided with multi-directional cable cross fixing nodes. The steel truss and the multi-directional cable The cross-fixed nodes are positioned by the multi-chord support rods, the double-cable lower chord node fastening device, the steel truss and the multi-directional cable cross-fixed nodes are positioned by the front chord double-stayed cables, and the multi-directional cable cross-fixed nodes are connected to the steel truss. The trusses are positioned by stay cables. A super-large-span multi-order prestressed steel truss structure and a construction method thereof are compact in structure and scientific and reasonable in construction method.

Description

technical field [0001] The invention relates to a steel truss structure, in particular to a super-large span multi-order prestressed steel truss structure and a construction method thereof, belonging to the field of steel structures. Background technique [0002] The closed coal shed generally adopts the middle column-free large-span space structure, of which the multi-order prestressed steel truss structure is one of them. The span of the coal shed using this structure can reach 200m, and the structure height can reach more than 60m. The multi-order prestressed structure is equipped with double prestressed tension cables and stay cables at the lower part of the truss, which are connected to each other through V-shaped struts. The tension cables, stay cables and steel trusses work together to form a multi-order prestressed structural system. In the middle of the main truss, the ends on both sides of the main chord double stay cable are rooted on the main truss. The chord is...

AI Technical Summary

Problems solved by technology

[0003] During the construction of the prestressed structure, the geometric relationship between the cable and the vertical strut, the friction properties between the two, and the tension sequence will inevitably affect the loss of the prestress, and eventually lead to the loss of the chord support after the prestress construction is completed. The actual internal force size and distribution of the cables, struts, and reticulated shell members of the grid structure are inconsistent with the design, which will have an adverse effect on the mechanical properties of the entire suspensive structure

This structure is relatively complicated, and the use effect is not good

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