CN101775876A - Spacial steel roof truss - Google Patents

Abstract

The invention discloses a spacial steel roof truss. The roof truss has a triangular section; upper and lower chords of the roof truss are not positioned in the same plane; and compared with a planar roof truss, the spacial steel roof truss can greatly reduce support systems of the roof truss and has higher stability than the planar roof truss system. The upper chord of the triangular spacial roof truss is made of H-shaped steel, and web members and the lower chord are made of steel pipes, so the spacial steel roof truss gives full play to good axial pressure and bending moment bearing performance of the H-shaped steel and the good mechanical property of members, and has the advantages of economic and reasonable structure, simple and convenient construction, and safety and reliability. Compared with the traditional roof truss, the spacial steel roof truss can save a great deal of investment, shorten site construction period and reduce steel consumption of the roof truss, the height of the roof truss and comprehensive cost, and has good safety performance. An electrolytic plant is a heat insulating plant; and because the height of the roof truss is reduced, the height of the plant can be reduced, the volume of the plant is decreased, and the energy can be saved after the plant is put into production and use.

Description

Space steel truss roof truss

technical field

The invention relates to a building structure roof truss form, in particular to a space steel truss roof truss used in the copper smelting industry.

Background technique

At present, the copper electrolysis workshop basically adopts flat trapezoidal steel pipe roof truss, and the roof adopts prefabricated reinforced concrete slabs. This roof structure system has a large roof self-weight load, a complex roof truss support system, a large amount of structural steel, and a long construction period.

Contents of the invention

The purpose of the present invention is to provide a space steel truss roof truss with a triangular cross-section, which can reduce the roof height, shorten the construction period, reduce the cost, save energy, and overcome the shortcomings of the original truss roof, long construction period and high structural cost.

A space steel truss roof truss, characterized in that: the roof truss adopts a triangular cross-section, the upper and lower chords of the roof truss are not on the same plane, and the upper and lower chords of the roof truss are stably supported by the web members, so that the roof truss itself forms a stable space structure system, which is consistent with the plane Compared with the roof truss, the support system of the roof truss can be greatly reduced, and the stability performance is far better than that of the flat roof truss system.

A space steel truss roof truss, characterized in that: the upper chord of the triangular space truss is made of H-shaped steel, the web and the lower chord are made of steel pipes, the H-shaped steel has good performance of bearing axial pressure and bending moment, and the steel pipe has good performance of bearing axial force Performance, the upper chord of the electrolytic roof truss bears the axial pressure and bending moment, the web and the lower chord bear the axial force, fully exerting the good mechanical performance of the rods, the structure is economical and reasonable, safe and reliable. Compared with traditional roof truss, it can save a lot of investment.

The positive effects of the present invention are: 1. Shorten the on-site construction period, reduce the comprehensive cost, the original plane roof truss has poor stability, many supports and long construction period. However, the roof truss of the present invention itself is a stable spatial structure system with few supports and short construction period. 2. Good safety performance. The original planar roof truss longitudinal tie bar spacing is generally about 6m, and the stability is poor. However, with the present invention, the roof chord bar node spacing is about 3m, the stability is greatly improved, the material strength is fully utilized, and the structural safety performance is improved. 3. The structural economic effect is obvious, the amount of steel used for the roof truss is reduced, and the height of the roof truss is reduced. The electrolysis plant is a thermal insulation plant. Due to the reduction of the height of the roof truss, the height of the plant can be reduced, and the volume of the plant can be reduced. The plant is put into production and use energy can be saved afterwards.

Description of drawings

Fig. 1 is the front view of the space steel truss roof truss structure of the present invention

Fig. 2 is a side view of the space steel truss roof truss structure of the present invention

Fig. 3 is the top view of the space steel truss roof truss structure of the present invention

Detailed ways

Embodiments of the present invention are described in detail below in conjunction with accompanying drawings:

The specific implementation of the present invention should be completed by the building steel structure construction and installation units with corresponding construction qualifications. The specific implementation is mainly divided into two stages: factory processing and on-site installation.

The processing of the steel truss roof truss is processed in the factory. Firstly, the raw materials and welding materials are purchased, and the welding equipment is prepared. The upper chord 2 is welded H-shaped steel, and the web 4 and lower chord 3 are finished high-frequency welded pipes. The manufacturing process of the welded H-shaped steel is: first cut the steel plate according to the cross-section requirements, and then fix the steel plates with spot welding. Then submerged arc welding machine is used to weld the weld seam of the whole component, and the finished steel pipe required by the design is purchased for the web 4 and the lower chord 3, and the steel pipe is cut according to the design requirements; the gusset plate is processed according to the design requirements. After the upper chord 2, the web 4, the lower chord 3, and the gusset plate are ready, they are assembled and welded. When welding, local electric welding is used for positioning first, and then automatic submerged arc welding is used to weld each weld seam. During the processing process, the external dimensions should be checked repeatedly to avoid excessive deviation. The steel truss roof truss roof chord node spacing of the invention is about 3m, the stability is greatly improved, the material strength is fully utilized, the structural safety performance is improved, and the roof slope is 1:10, which is convenient for roof drainage. After the welding is completed, sandblasting or shot blasting is carried out to remove rust, and finally a second coat of primer is sprayed. Before the on-site installation and construction, the positioning of the pre-embedded bolts at the top of the civil engineering column 1 should be reviewed, and the steel truss hoisting should be started after confirmation. After the steel truss is hoisted, it is slowly in place when it is 100mm from the column datum level. After the steel truss is hoisted in place, the butt joint adjustment and correction are performed, and then the connection is fixed. When the steel truss is hoisted, the theodolite is used to correct it when it is hoisted, and any deviation is corrected at any time. After the hoisting of the adjacent trusses is completed, install the support immediately, and finally hoist the roof purlin and roof panel system.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, several equivalent substitutions or obvious modifications can be made without departing from the concept of the present invention, and the performance or use is the same, then it should be regarded as belonging to the present invention by the submitted claims The scope of protection determined by the book.

Claims (2)

1. spacial steel roof truss is characterized in that: roof truss adopts section triangle, and the last lower edge of roof truss forms stable support by web member to lower chord on the roof truss not at grade, thus stable space structures system of roof truss self formation.

2. spacial steel roof truss according to claim 1 is characterized in that: triangle space roof truss steel truss winds up and adopts the H section steel manufacture, and lower chord and web member adopt steel pipe.

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