CN103485479A - Assembly type prestress honeycombed web composite beam - Google Patents

Abstract

The invention relates to an assembled prestressed honeycomb web composite beam, which is formed by assembling two prestressed corrugated web channel steel composite beams through bolts. Prestressed corrugated web channel steel composite beam is composed of reinforced concrete flange, profiled steel plate, upper flange, web, lower flange, prestressed cable, anchorage and beam end plate; prestressed corrugated channel steel composite beam The cross-section mouth shape is composed of reinforced concrete flange, profiled steel plate, upper and lower flanges and web; the section of the web is uniform or uneven and periodically repeats the waveform; the prestressed cable passes through the web and the end plate of the beam , after being tensioned, it is fixed on the beam end plate by anchors. The planar layout of the web plate of the present invention is in a honeycomb shape, which can obtain the best result in terms of the overall bearing capacity of the component, and is suitable for the fabricated steel structure system, especially the innovative fabricated prestressed structure system of the large-span multi-high-rise fabricated steel structure system Composite beams, compared with traditional fabricated beams, have the advantages of light weight, high bearing capacity and large span.

Description

An Assembled Prestressed Honeycomb Web Composite Beam

technical field

The invention relates to an assembled prestressed honeycomb web composite beam, which belongs to the technical field of building profiles.

Background technique

The prefabricated steel structure system effectively overcomes the shortcomings of traditional steel structure housing, such as large amount of on-site welding, slow construction speed and difficult quality control, and is an important direction for the development of steel structure housing systems. In the prefabricated steel structure system, the on-site assembly of beams and beams is a problem that needs to be studied emphatically.

Compared with steel beams, composite beams have the following advantages: the compression effect of composite floor concrete on steel beams can be used to increase the effective height of beam sections and improve the bending stiffness and bearing capacity of steel structural beams, thereby saving steel and reducing construction costs ;Compared with reinforced concrete beam-slab structure, steel structure composite beam can save formwork, reduce embedded parts, reduce self-weight, lower floor height, facilitate construction, shorten construction period and facilitate installation of pipelines; composite beam can realize the full integration of high-rise steel structure system Assembled.

In the existing prefabricated steel structure system, traditional composite beams are usually assembled using two channel steel composite beams, and the webs of the two channel steels are butted and connected by bolts to form a prefabricated H-shaped steel. However, in this splicing method, the shear force is transmitted to the web through bolts, and the web is a flat steel plate. The number of bolts required and the amount of steel used for the web are large, and the shear bearing capacity needs to be improved. It can be seen that the effect of using traditional steel components in fabricated steel structures is not very satisfactory, which not only affects the mechanical performance of components, but also consumes a large amount of steel, resulting in unnecessary waste. The application of prestressing technology can not only save steel, but also promote the development of large-span, multi-story steel structure system. In order to solve the above problems, the present invention proposes an assembled prestressed honeycomb web composite beam, which can significantly improve the beam bearing capacity and save steel, and has a wider range of uses; at the same time, it can realize large-scale industrial production and promote Development of fully fabricated steel structure system.

Contents of the invention

The purpose of the present invention is to propose an assembled prestressed honeycomb web composite beam, which has low cost, superior mechanical performance and is suitable for assembly steel structure systems, especially large-span multi-story assembly steel structure systems. Assembled composite beams.

In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an assembled prestressed honeycomb web composite beam, the composite beam is butted by two prestressed honeycomb web channel steel composite beam webs, and on the web Bolts are used for assembly and connection at the bolt holes; prestressed corrugated web channel steel composite beams include reinforced concrete slabs, profiled steel plates, upper flanges, webs, lower flanges, prestressed cables, anchors and beam end plates ;The section shape of the composite beam is composed of reinforced concrete slab, profiled steel plate, upper flange, web and lower flange; the reinforced concrete flange, profiled steel plate, and upper flange are fixed by bolts; the upper flange Parallel to the lower flange, the web is vertically located between the upper flange and the lower flange; the section of the web shows uniform or uneven periodically repeated corrugations, and the corrugated sections are rectangular corrugated curves, trapezoidal corrugated curves, and wedge-shaped corrugated curves or sinusoidal curve; there are bolt holes and prestressed cable holes on the web; the upper and lower flanges are steel plates, the web is located between the upper and lower flanges as a whole, and the corrugation curve of the web along the length direction The outermost side is flush with the upper flange and the lower flange along a side line along the length direction; the beam end plate is a steel plate, perpendicular to the upper flange, web and lower flange, and located at the two ends of the prestressed corrugated web channel steel girder end, the beam end plate is welded to the upper flange, web and lower flange; prestressed cable holes are left on the beam end plate; prestressed cables pass through the prestressed cable holes reserved on the web and beam end plates, After being stretched, it is fixed on the beam end plates at both ends of the prestressed corrugated web channel steel beam by anchors.

The profiled steel plate is located above the upper flange, the transverse steel bar is welded to the upper part of the profiled steel plate, and the reinforced concrete wing plate is located above the profiled steel plate, wherein the profiled steel plate and a side line along the length direction of the reinforced concrete plate are along the corrugated curve of the web The outermost sidelines in the length direction are flush; the rectangular corrugated curve is an arc-angled rectangular corrugated curve, the trapezoidal corrugated curve is an arc-angled trapezoidal corrugated curve, and the wedge-shaped corrugated curve is an arc-angled wedge-shaped corrugated curve; trapezoidal corrugated curve, arc-angled trapezoidal The inclination angle of the trapezoidal oblique line section of the corrugated curve is 20°-90°, and the inclination angle of the wedge-shaped oblique line section of the wedge-shaped corrugated curve and arc angle wedge-shaped corrugated curve is 20°-90°; the web and the upper flange and the lower flange There are single-sided fillet welds in between; the corrugation density and height of the web can be changed according to the force requirements; the trapezoidal corrugation curve of the arc angle, the rectangular corrugation curve of the arc angle and the wedge-shaped corrugation curve of the arc angle are made by CNC bending technology. The sinusoidal curve is made by CNC rolling technology; the prestressed cable is a prestressed cable, or a prestressed tendon, and the prestressed cable passing through the prestressed cable hole reserved on the web and beam end plate is one or Multiple; the line shape of the prestressed cable is notched upward, and the line shape can be changed according to the force requirements.

Compared with the prefabricated composite beam in the traditional prefabricated steel structure system, the present invention has the following advantages:

1. The composite beam of the present invention adopts the symmetrical arrangement of two prestressed cables, which effectively improves the bearing capacity of the assembled composite beam, ensures the rationality of the force, and the reference of prestressing technology can ensure that the assembled composite beam Under the premise of bearing capacity, the self-weight of the assembled composite beam is effectively reduced, and the span of the beam is increased, so that the present invention is more suitable for large-span and multi-high-rise assembled steel structure systems.

2. The web of the composite beam presents a corrugated curve, which can effectively utilize the excellent out-of-plane rigidity, buckling resistance and high fatigue strength of the corrugated steel plate. Compared with the flat steel plate assembled from channel steel, the same thickness The lower shear bearing capacity and out-of-plane deformation resistance are significantly improved.

3. The composite beam web is assembled with two corrugated webs, which is equivalent to double corrugated webs, which can effectively improve the stability and bearing capacity of the member, especially the torsional bearing capacity. The plane layout of the web is honeycomb-shaped, which can be Optimal results were obtained in terms of the overall load-carrying capacity of the member.

Therefore, the assembled prestressed honeycomb web composite girder of the present invention can give full play to the above three technical advantages at the same time, and its mechanical properties are significantly improved compared with other similar products; Increase the span of prefabricated steel beams to effectively promote the development of large-span and multi-high-rise prefabricated steel structure systems in my country. At the same time, in the prefabricated prestressed honeycomb web composite beam proposed by the present invention, the biggest feature of the section combination is to optimize the relationship between the mechanical properties of the section and the amount of steel used in the product to a greater extent, making it more rational and scientific change. The introduction of prestressing technology can improve the bearing capacity of composite beams, reduce the self-weight of composite beams, and increase the span of beams. Therefore, the present invention has excellent mechanical properties such as high bearing capacity and high rigidity, and is a very ideal composite beam form. The invention adopts full-automatic welding technology and professional positioning fixtures, which can ensure accurate positioning between the web and the flange, consistent welding seam track, easy standardization, multi-scale production, and effectively improve production efficiency.

Description of drawings

Fig. 1 is the structural schematic diagram of the assembled prestressed honeycomb web composite beam;

Fig. 2 is the exploded view of the structural unit of the assembled prestressed honeycomb web composite beam;

Fig. 3 is the structural representation of the prestressed honeycomb web composite beam trapezoidal section web;

Fig. 4 is the structural representation of prestressed honeycomb web steel girder;

Fig. 5 is the unit exploded view of the prestressed honeycomb web steel girder;

Figure 6 is a schematic diagram of a prestressed corrugated web channel steel girder;

Fig. 7 is the unit exploded view of prestressed corrugated web channel steel girder;

Fig. 8 is a schematic diagram of a rectangular corrugated curve of a web section;

Fig. 9 is a schematic diagram of the trapezoidal corrugation curve of the web section;

Fig. 10 is a schematic diagram of the wedge-shaped corrugation curve of the web section;

Fig. 11 is a schematic diagram of a rectangular corrugation curve with an arc angle of a web section;

Fig. 12 is a schematic diagram of the arc angle trapezoidal corrugation curve of the web section;

Fig. 13 is a schematic diagram of the arc angle wedge-shaped corrugation curve of the web section;

Fig. 14 is the schematic diagram of the sinusoidal corrugation curve of the web section;

Figure 15 is a schematic plan view of a prestressed corrugated web channel steel girder;

Fig. 16 is a schematic plan view of the assembled prestressed honeycomb web steel girder.

In the figure: 1. Prestressed corrugated web channel steel composite beam 2, upper flange 3, web 4, lower flange 5, bolt hole 6, bolt 7, prestressed cable 8, prestressed cable hole 9, anchorage 10. Beam end plate 11, profiled steel plate 12, reinforced concrete wing plate 13, stud 14-transverse reinforcement.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and example.

As shown in Figure 1, it is the structural representation of the assembled prestressed honeycomb web composite beam, and Figure 2 is an exploded view of the structural unit of the assembled prestressed honeycomb web composite beam, and the assembled prestressed honeycomb web web proposed by the present invention The slab composite beam is assembled by two prestressed corrugated web channel steel composite beams 1 through bolts 6. Assembly connection at hole 5.

Figure 3 is a structural schematic diagram of the prestressed honeycomb web composite beam trapezoidal section web, Figure 4 is a structural schematic diagram of the prestressed honeycomb web steel beam, and Figure 5 is a prestressed honeycomb web steel beam Figure 6 is a schematic diagram of a prestressed corrugated web channel steel beam, and Figure 7 is a unit exploded view of a prestressed corrugated web channel steel beam. Upper flange 2, web plate 3, lower flange 4, prestressed cable 7, anchorage 9, beam end plate 10, profiled steel plate 11 and reinforced concrete flange 12; upper flange 2 is parallel to lower flange 4, The web 3 is vertically located between the upper flange 2 and the lower flange 4; the web 3 is provided with bolt holes 5 and prestressed cable holes 8; the profiled steel plate 11 is located above the upper flange 2, and the transverse reinforcement 14 is welded The upper part of the profiled steel plate 11; the reinforced concrete wing plate 12 is located above the profiled steel plate 11;

Figure 8 is a schematic diagram of the rectangular corrugation curve of the web section, Figure 9 is a schematic diagram of the trapezoidal corrugation curve of the web section, Figure 10 is a schematic diagram of the wedge-shaped corrugation curve of the web section, and Figure 11 is a circular arc angle rectangle of the web section Schematic diagram of the corrugation curve, Figure 12 is a schematic diagram of the arc angle trapezoidal corrugation curve of the web section, Figure 13 is a schematic diagram of the arc angle wedge-shaped corrugation curve of the web section, Figure 14 is a schematic diagram of the sinusoidal corrugation curve of the web section, and Figure 15 is The plane schematic diagram of the prestressed corrugated web channel steel beam. Figure 16 is the plane schematic diagram of the assembled prestressed honeycomb web steel beam. The section of the web 3 is a uniform or non-uniform periodically repeated waveform, and the corrugated section is rectangular Corrugated curve, or rectangular corrugated curve with arc angle, or trapezoidal corrugated curve, or trapezoidal corrugated curve with arc angle, or wedge-shaped corrugated curve, or wedge-shaped corrugated curve with arc angle, or sinusoidal curve; upper flange 2 and the lower flange 4 are steel plates, the web 3 is located between the upper flange 2 and the lower flange 4 as a whole, and the corrugation curve of the web 3 along the length direction is the outermost One side line in the direction is flush and connected, and there are single-sided fillet welds between the web 3 and the upper flange 2 and the lower flange 4 respectively; the beam end plate 10 is a steel plate, perpendicular to the upper flange 2, the web 3 and the lower flange The flange 4 is located at both ends of the prestressed corrugated web channel steel beam 1, and the beam end plate 10 is welded to the upper flange 2, the web 3 and the lower flange 4; prestressed cable holes are left on the beam end plate 10 8. The prestressed cable 7 passes through the prestressed cable hole 8 reserved on the web 3 and the beam end plate 10, and is fixed to the two ends of the prestressed corrugated web channel steel beam 1 by the anchor 9 after being stretched. On the beam end plate 10; the inclination angle of the trapezoidal oblique line section of the trapezoidal corrugation curve and arc angle trapezoidal corrugation curve is 20°-90°, and the inclination angle of the wedge-shaped oblique line section of the wedge-shaped corrugation curve and arc angle wedge-shaped corrugation curve is 20°-90° °; The corrugation density and height of the web 3 can be changed according to the force requirements; the arc-angle trapezoidal corrugation curve, the arc-angle rectangular corrugation curve and the arc-angle wedge-shaped corrugation curve are made by CNC bending technology, and the sine curve is made by CNC roller The prestressed cable 7 is a prestressed cable, or a prestressed tendon, and the prestressed cable 7 passing through the prestressed cable hole 8 reserved on the web 3 and the beam end plate 10 is one or more ; The linear shape of the prestressed cable 7 is notched upward, and the linear shape can be changed according to the force requirements.

Claims (4)

1. An assembled prestressed honeycomb web composite beam, characterized in that: the prestressed corrugated web channel steel composite beam (1) consists of an upper flange (2), a web (3), a lower flange ( 4), prestressed cable (7), anchorage (9) and beam end plate (10), reinforced concrete wing plate (12), profiled steel plate (11); reinforced concrete wing plate (12), profiled steel plate (11), the upper flange (2) are fixed by pegs (13); the upper flange (2) is parallel to the lower flange (4), and the web (3) is vertically located between the upper flange (2) and the lower Between the flanges (4); the assembled prestressed honeycomb web composite beam is assembled by two prestressed corrugated web channel steel composite beams (1) through bolts (6), and the two prestressed corrugated webs The web of the channel steel composite beam (1) is butted, and the web is assembled and connected at the bolt hole (5) by using bolts (6); the section of the web (3) has uniform or uneven periodically repeated corrugations, The corrugated section is a rectangular corrugated curve, trapezoidal corrugated curve, wedge-shaped corrugated curve or sinusoidal curve; the web (3) is provided with bolt holes (5) and prestressed cable holes (8); the upper flange (2) and the lower wing The edge (4) is a steel plate, the web (3) is located between the upper flange (2) and the lower flange (4) as a whole, and the corrugation curve of the web (3) is along the outermost side of the length direction and the upper flange (2) ) and the lower flange (4) are flush with one edge along the length direction; the beam end plate (10) is a steel plate, perpendicular to the upper flange (2), the web (3) and the lower flange (4), located at The two ends of the prestressed corrugated web channel steel beam (1), the beam end plate (10) and the upper flange (2), web (3) and lower flange (4) are welded and connected; the beam end plate (10) The prestressed cable hole (8) is left on the top; the prestressed cable (7) passes through the prestressed cable hole (8) reserved on the web (3) and beam end plate (10), and is tensioned by the anchor Fix it on the beam end plate (10) at both ends of the prestressed corrugated web channel steel beam (1) with tool (9); the profiled steel plate (11) is located above the upper flange (2), and the transverse steel bar (14) is welded On the upper part of the profiled steel plate (11), the reinforced concrete wing plate (12) is located above the profiled steel plate (11), wherein the profiled steel plate (11), the edge of the reinforced concrete plate (12) along the length direction and the web The corrugation curve is flush along the outermost edge in the length direction. 2. An assembled prestressed honeycomb web composite beam according to claim 1, characterized in that: the rectangular corrugation curve is a circular arc angle rectangular corrugation curve, and the trapezoidal corrugation curve is a circular arc angle trapezoidal corrugation curve, The wedge-shaped corrugation curve is an arc angle wedge-shaped corrugation curve; the inclination angle of the trapezoidal oblique line segment of the trapezoidal corrugation curve and the arc angle trapezoidal corrugation curve is 20°-90°, and the wedge-shaped oblique line segment of the wedge-shaped corrugation curve and the arc angle wedge-shaped corrugation curve The inclination angle is 20°-90°; the arc angle trapezoidal corrugation curve, arc angle rectangular corrugation curve and arc angle wedge corrugation curve are made by CNC bending technology, and the sinusoidal curve is made by CNC rolling technology. 3. An assembled prestressed honeycomb web composite beam according to claim 1 or 2, characterized in that: the prestressed cables (7) are prestressed cables, or prestressed tendons, passing through the web ( 3) There are one or more prestressed cables (7) in the prestressed cable hole (8) reserved on the beam end plate (10); the corrugation density and height of the web (3) can be changed according to the force requirements ; There are single fillet welds between the web (3) and the upper flange (2) and lower flange (4). 4. An assembled prestressed honeycomb web composite beam according to claim 1, 2 or 3, characterized in that: the line shape of the prestressed cable (7) is notched upward, and the line shape can be adjusted according to the force Ask for a change.

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