Chord-forked reinforced overhanging plane truss steel awning system with curved concave back rods

Abstract

The invention provides a chord member forking reinforced overhanging plane truss steel awning system with curved concave back rods, which comprises a support structure, back rods and a plane truss steel awning, the plane truss steel awning is mounted on the support structure, and the plane truss steel awning is provided with an inner ring structure and an outer ring structure on two sides of the support structure respectively. The upper end of the back rod is connected with the outer edge of the outer ring structure, the lower end of the back rod is connected with the supporting structure, and the back rod is of an S-shaped bent arc structure. By arranging the back rod structure of the S-shaped bent arc structure, a bent arc concave shape is formed, the axial rigidity needed by stress of the cantilever truss is improved, and a traditional steel awning structure is effectively simplified.

Description

Technical Field

[0001] The invention belongs to the field of construction, and in particular relates to a chord-branched reinforced cantilevered plane truss steel canopy system with a curved inner concave back rod. Background Art

[0002] Modern sports buildings have an increasingly strong demand for structural integration, especially for exposed stadium steel canopies, where the structural system itself is part of the building's exterior appearance. Changes in various structural systems or the locations of structural components will more or less affect the architectural effect. Therefore, in addition to solving the inevitable structural problems of large spans and large cantilevers in steel canopies, the choice of structural system must also take into account the visibility of the structure to the spectators in the stands, especially at a human scale. For traditional steel canopy plane or three-dimensional trusses, in order to maintain the overall stability of the structure, ring trusses are arranged along the entire length of the ring. The ring trusses will directly conflict with the audience's perspective at the human scale of the high stands, greatly affecting the viewing experience of the stadium. Summary of the invention

[0003] The invention discloses a chord rod bifurcated reinforced cantilever plane truss steel canopy system with a curved inner concave back rod, so as to simplify the traditional steel canopy structure.

[0004] The present invention discloses a chord-branched reinforced cantilevered plane truss steel canopy system with a curved inwardly concave back rod, comprising: a supporting structure, a back rod, and a plane truss steel canopy. The plane truss steel canopy is installed on the supporting structure, and the plane truss steel canopy is respectively provided with an inner ring structure and an outer ring structure on both sides of the supporting structure, the upper end of the back rod is connected to the outer edge of the outer ring structure, and the lower end of the back rod is connected to the supporting structure, and the back rod is an S-shaped curved arc structure.

[0005] Furthermore, the plane truss steel canopy also includes a three-dimensional ring truss on the top of the column, the supporting structure is fixedly connected to the three-dimensional ring truss on the top of the column, and the inner ring structure and the outer ring structure are respectively located on the three-dimensional ring truss on the top of the column and connected.

[0006] Furthermore, the outer ring structure is an annular structure surrounded by a plurality of outer triangular pyramids.

[0007] Furthermore, the inner ring structure includes a plurality of inner triangular pyramids and inner cantilevered plane trusses, the inner cantilevered plane trusses are connected to the column top three-dimensional ring trusses, and the inner triangular pyramids are connected to the bottom supports of the inner cantilevered plane trusses and the column top three-dimensional ring trusses.

[0008] Furthermore, the plane truss steel canopy also includes a plurality of fold line arch trusses at large openings, the chord-reinforced cantilever plane truss steel canopy system is also provided with an opening structure, the fold line arch trusses at large openings are arranged on both sides of the opening structure, and the top of the fold line arch trusses at large openings is connected to the inner ring structure support.

[0009] Furthermore, the supporting structure is a concrete stand structure, and the concrete stand structure is provided with a plurality of supporting columns, and the supporting columns are arranged in a ring shape, and the plane truss steel canopy is fixedly connected to the top of the supporting rods.

[0010] Furthermore, the lower end of the back rod faces inward, and is provided with a first curved arc and a second curved arc in sequence from top to bottom, and the first curved arc is connected to the second curved arc to form an S-shaped curved arc structure.

[0011] Furthermore, the back rods are provided in plurality, and the plurality of back rods are arranged in sequence to form a ring structure.

[0012] Furthermore, a transverse connecting beam is provided between adjacent back rods.

[0013] Furthermore, the back rod is also provided with a right-angle fixing piece, and two ends of the right-angle fixing piece are respectively fixedly connected to two ends of the second curved arc.

[0014] Compared with the prior art, the present invention provides an S-shaped back rod structure to form an inwardly concave shape of the arc, thereby weakening the axial rigidity required for the cantilever truss to bear force, and effectively simplifying the traditional steel canopy structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A local model of a stadium according to an embodiment of the present invention;

[0016] Figure 2 A typical cross section of a stadium according to an embodiment of the present invention;

[0017] Figure 3 It is a partial schematic diagram of a plane truss steel canopy according to an embodiment of the present invention;

[0018] Figure 4 This is a diagram of the back rod arrangement method of an embodiment of the present invention.

[0019] 1. Support structure; 2. Back rod; 21. First bend; 22. Second bend; 23. Right-angle fixing piece; 24. Horizontal connecting beam; 3. Plane truss steel canopy; 31. Inner ring structure; 311. Inner triangular pyramid; 312. Inner cantilevered plane truss; 32. Outer ring structure; 321. Outer triangular pyramid; 33. Three-dimensional ring truss at the top of the column. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only embodiments of a part of the present invention, rather than all embodiments.

[0021] The steel canopy structure of traditional stadiums is directly exposed, and the architectural shape and appearance have strict requirements on the arrangement of the structural system and structural components. The main structure of the curtain wall at the rear of the canopy is concave, which poses a huge challenge to the structural stress.

[0022] In addition, due to the limitation of vertical support conditions, the steel canopy is about 360m long from north to south and about 280m wide from east to west. There is a large opening structure with a span of 154m on the east side facing the sea. The cantilever length of the roof steel canopy from the high stand to the large stand gradually changes from 62.5 to 32 meters. The highest point of the structure is about 63.5m high, and the distance between the columns supporting the roof varies from about 10.5 to 12m. This asymmetric large-scale cantilever shape adds great challenges to the design of the roof structure.

[0023] According to the characteristics of the stadium building, it is necessary to form two 54m small opening structures on the north and south sides of the venue by withdrawing columns. On the east side of the site, a large opening structure of 154m is formed due to the need to view the sea. This will lead to uneven stiffness of the lower vertical structure. The structural rigid body must be formed through the roof ring truss and the tail structure to ensure sufficient stiffness and force reliability of the large cantilever structure, resulting in a complex stadium structure that requires structural improvement.

[0024] The embodiments of the present invention are based on the above situation. Figure 1 , 2 As shown, a chord-branched reinforced cantilever plane truss steel canopy 3 system with a curved inwardly concave back rod 2 is disclosed, comprising: a supporting structure 1, a back rod 2, a plane truss steel canopy 3, wherein the plane truss steel canopy 3 is installed on the supporting structure 1, and the plane truss steel canopy 3 is respectively provided with an inner ring structure 31 and an outer ring structure 32 on both sides of the supporting structure 1, the upper end of the back rod 2 is connected to the outer edge of the outer ring structure 32, and the lower end of the back rod 2 is connected to the supporting structure 1, and the back rod 2 is an S-shaped curved arc structure.

[0025] Among them, Figure 1 , 2 As shown, the support structure 1 is a ring-type base structure, which can support the back rod 2 and the plane truss steel canopy 3. The back rod 2 is an S-shaped curved arc structure, which has a spring-like function. The outer ring structure 32 of the plane truss steel canopy 3 is connected to the ring-type base structure through the back rod 2. The outer ring structure 32 of the plane truss steel canopy 3 is pulled by the back rod 2, so that the inner ring structure 31 of the plane truss steel canopy 3 can be stably lifted.

[0026] The embodiment of the present invention provides a back rod 2 structure with an S-shaped curved arc structure to form a curved arc concave shape, which weakens the axial rigidity required for the cantilever truss to bear force, and effectively simplifies the traditional steel canopy structure. In addition, the back rod 2 of the embodiment of the present invention has a curved arc concave structure, which can participate in the plane truss steel canopy 3 force, and the S-shaped curved arc structure of the back rod 2 is used to form a spring-like effect. Its stiffness force mechanism participates in the overall force of the steel canopy, which can effectively improve the stability of the plane truss steel canopy 3 force.

[0027] Optional, such as Figure 1 , 3 As shown, the plane truss steel canopy 3 also includes a column top three-dimensional ring truss 33, the support structure 1 is fixedly connected to the column top three-dimensional ring truss 33, and the inner ring structure 31 and the outer ring structure 32 are respectively located at the column top three-dimensional ring truss 33 and connected.

[0028] The column top three-dimensional ring truss 33 is a ring structure composed of a plurality of triangular pyramid frames, which is directly fixedly connected to the support structure 1 , and the inner ring structure 31 and the outer ring structure 32 are respectively located on both sides of the column top three-dimensional ring truss 33 and fixedly connected.

[0029] In the embodiment of the present invention, a plurality of triangular pyramidal frames are arranged to form a three-dimensional ring truss 33 at the top of the column, so that the bottom of the three-dimensional ring truss 33 at the top of the column presents a forked structure of the lower chord, and the support structure 1 is connected to a corner of the triangular pyramidal frame to form a forked support structure 1. The triangular principle is utilized to improve the structural stability to form an out-of-plane support, thereby improving the overall structural stability, improving the structural layout from a human viewing angle, and improving the visibility.

[0030] In particular, such as Figure 1 , 3 As shown, the outer ring structure 32 is an annular structure surrounded by a plurality of outer triangular pyramids 321 .

[0031] Among them, the outer triangular cone 321 is on the outside of the column top three-dimensional ring truss 33, forming a forked structure of the tail upper chord and the lower chord, forming a reinforced structure of the cantilever truss with the column top ring truss, improving the root stiffness and torsional stiffness of the cantilever truss, weakening the force on the canopy tie rod, and facilitating the control of the deformation of the cantilever truss.

[0032] In the embodiment of the present invention, the outer ring structure 32 is set as a ring structure surrounded by multiple outer triangular pyramids 321, so that the outer ring structure 32 and the column top three-dimensional ring truss 33 form a cantilever truss reinforcement structure, thereby improving the integrity of the plane truss steel canopy 3. This system can adapt to the root weakening effect of the lower overall stand structure due to the architectural shape or functional local column withdrawal, and can reduce the influence of balanced column withdrawal through the overall root stiffness formed by the bifurcation of the lower chord at the column top.

[0033] In particular, such as Figure 1 , 3As shown, the inner ring structure 31 includes a plurality of inner triangular pyramids 311 and inner cantilevered plane trusses 312. The inner cantilevered plane trusses 312 are connected to the column top three-dimensional ring trusses 33. The inner triangular pyramids 311 are connected to the bottom supports of the inner cantilevered plane trusses 312 and the column top three-dimensional ring trusses 33.

[0034] In particular, such as Figure 1 , 3 As shown, the plane truss steel canopy 3 also includes a plurality of folded-line arch trusses at the large opening, and the chord-reinforced cantilever plane truss steel canopy 3 system is also provided with an opening structure, and the folded-line arch trusses at the large opening are arranged on both sides of the opening structure, and the top of the folded-line arch trusses at the large opening is supported and connected to the inner ring structure 31.

[0035] Among them, the chord-branched reinforced cantilevered plane truss steel canopy 3 system is provided with two or more columns at the opening structure, and the broken-line arch truss is provided at the column at the large opening to support the opening structure.

[0036] Particularly, the support structure 1 is a concrete stand structure, and the concrete stand structure is provided with a plurality of support columns, and the support columns are arranged in a ring shape, and the plane truss steel canopy 3 is fixedly connected to the top of the support rod.

[0037] Particularly, the lower end of the back rod 2 faces inward, and is provided with a first curved arc 21 and a second curved arc 22 from top to bottom, and the first curved arc 21 and the second curved arc 22 are connected to form an S-shaped curved arc structure.

[0038] In particular, such as Figure 4 As shown, the back rods 2 are provided in a plurality, and the plurality of back rods 2 are arranged in sequence to form a ring structure.

[0039] The first curved arc 21 and the second curved arc 22 are located at the lower middle part of the back rod 2. A plurality of back rods 2 are arranged adjacent to each other in sequence to form a ring structure.

[0040] In the embodiment of the present invention, the back rod 2 is provided with a first curved arc 21 and a second curved arc 22 to present an S-shaped structure, and the bottom of the back rod 2 faces the inside of the system, and the top of the back rod 2 faces the outside of the system. A plurality of back rods 2 are arranged adjacent to each other in sequence to form an annular bowl-shaped structure, which can achieve a pulling and supporting effect on the outside of the plane truss steel canopy 3.

[0041] Particularly, a transverse connecting beam 24 is provided between adjacent back rods 2 .

[0042] Among them, adjacent back rods 2 are also fixedly connected by transverse connecting beams 24 to form a mesh structure, thereby improving the stability between the back rods 2.

[0043] Particularly, the back rod 2 is further provided with a right-angle fixing member 23 , and two ends of the right-angle fixing member 23 are respectively fixedly connected to two ends of the second curved arc 22 .

[0044] Among them, the right-angle fixing piece 23 is arranged on the outer side of the arc of the second bend 22, and the right-angle fixing piece 23 is fixedly connected to the outer side of the arc of the second bend 22, which effectively improves the stability of the second bend 22 and alleviates the problem of metal fatigue of the second bend 22 due to long-term pulling.

[0045] A comprehensive stadium is now designed. The plane of the comprehensive stadium is about 430m long from north to south and about 400m wide from east to west. The steel canopy is about 360m long from north to south and about 280m wide from east to west. There is a large opening structure with a span of 154m on the east side facing the sea. The cantilever length of the roof steel canopy gradually changes from the high stand to the large stand to 62.5 to 32 meters. The highest point of the structure is about 63.5m high, and the column distance of the supporting roof column varies from about 10.5 to 12m. According to the architectural shape, the lower structure adopts a concrete frame system, and the roof steel canopy adopts a cone-reinforced cantilever plane truss system with a curved back rod 2. The steel canopy is hingedly connected to the supporting concrete straight column on the top of the stand, the column foot of the curved back rod 2 is rigidly connected to the second floor (outside steel frame to the first floor), and the column top is hingedly connected to the tail of the steel canopy. The 154m span large opening structure needs to be spanned by a rhombus truss with axillary.

[0046] In order to compare the difference between the traditional solution and the solution of the embodiment of the present invention, two solutions are now used for simulation.

[0047] By comparing the traditional scheme with the embodiment scheme of the present invention, it can be seen that the steel canopy adopts a combined truss scheme with a large span and a large cantilever. Under the action of constant and live normal loads, the lower chord is compressed, and the compressed rods have the problem of lower chord instability. The maximum cantilever length is 62.5m, and the lateral constraint condition of the rods of the plane truss is more suitable at 20m to 25m, which means that the traditional scheme requires 3 ring trusses at the front end of the frame column. However, there is basically no ceiling under the stadium, and the 3 ring trusses directly affect the visual effect. In order to reduce the out-of-plane stability problem of the compressed rods of the lower chord, the embodiment scheme of the present invention adopts the method of cross-connecting the lower chord at a distance of about 20m from the frame column, and connects the support point of the column at the intersection through rods to form a cone, thereby increasing the root stiffness. Taking the intersection as the control point, a plane truss is made inward to form a single-frame structural logic in the stadium. At the connection with the back rod 2 at the rear, the lower chord adopts a single straight rod for easy connection, and the upper chord adopts two rods that intersect at the connection with the back rod 2 to form a large-scale stable cone, thereby improving the stiffness of the rear of the structural column.

[0048] The integral steel canopy of the embodiment of the present invention has a north-south axial length of about 360m and an east-west axial length of about 280m. It has no seams and adopts a cone-reinforced cantilever plane truss structure with a curved back rod 2. The distance between concrete columns is about 10m. It cantilevers 62.5m on the west side, 30m on the east side, and 48m on the south and north sides. It is equipped with three ring trusses. On the west side, the truss height is 12m, and the back rod 2 height is 41.8m. In the inner cantilever part, the maximum cross-sections of the upper chord, lower chord and web are P600x18, P650x22 and P600x18 respectively, and the maximum cross-sections of the rear upper chord, lower chord and web are P800x25, P900x30 and P600x18 respectively. On the south and north sides, the truss height is 8.2m, and the back rod 2 height is 24.8m. For the inner cantilever part, the maximum cross-sections of the upper chord, lower chord and web are P600x18, P600x18 and P500x14 respectively; the maximum cross-sections of the rear upper chord, lower chord and web are P700x25, P900x30 and P700x25 respectively.

[0049] In summary, the embodiment of the present invention can effectively pull and support the plane truss steel canopy 3 by setting an S-shaped curved arc back rod 2 structure. At the same time, the column top three-dimensional ring truss 33 is a ring structure composed of multiple triangular cone frames, forming a forked support structure 1, which effectively improves the structural system of the plane truss steel canopy 3, simplifies structural requirements, avoids the problem of setting up multiple ring trusses, and reduces the visual interference of spectators in the gymnasium.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the specification of this application, the technicians can still modify or replace the specific implementation mode of the present invention with equivalents, but these modifications or changes do not deviate from the scope of protection of the pending claims of the present application.

Claims

1. A chord-branched reinforced cantilever plane truss steel canopy system with curved concave back bars. It is characterized in that include: A supporting structure, a back rod, and a plane truss steel canopy, wherein the plane truss steel canopy is installed on the supporting structure, and the plane truss steel canopy is provided with an inner ring structure and an outer ring structure on both sides of the supporting structure, respectively, the upper end of the back rod is connected to the outer edge of the outer ring structure, and the lower end of the back rod is connected to the supporting structure, and the back rod is an S-shaped curved arc structure.

2. According to claim 1, a chord-braced reinforced cantilevered plane truss steel canopy system with curved inner concave back bars, It is characterized in that The plane truss steel canopy also includes a column top three-dimensional ring truss, the support structure is fixedly connected to the column top three-dimensional ring truss, and the inner ring structure and the outer ring structure are respectively located at the column top three-dimensional ring truss and connected.

3. According to claim 2, a chord-bar bifurcated reinforced cantilever plane truss steel canopy system with curved inner concave back bars, It is characterized in that The outer ring structure is an annular structure surrounded by a plurality of outer triangular pyramids.

4. According to claim 2, a chord-braced reinforced cantilevered plane truss steel canopy system with curved concave back bars, It is characterized in that The inner ring structure includes a plurality of inner triangular pyramids and inner cantilevered plane trusses. The inner cantilevered plane trusses are connected to the column top three-dimensional ring trusses. The inner triangular pyramids are connected to the bottom supports of the inner cantilevered plane trusses and the column top three-dimensional ring trusses.

5. According to claim 2, a chord-bar bifurcated reinforced cantilever plane truss steel canopy system with curved inner concave back bars, It is characterized in that The plane truss steel canopy also includes a plurality of fold line arch trusses at large openings. The chord-forked reinforced cantilever plane truss steel canopy system is also provided with an opening structure. The fold line arch trusses at the large openings are arranged on both sides of the opening structure, and the tops of the fold line arch trusses at the large openings are connected to the inner ring structure support.

6. According to claim 1, a chord-braced reinforced cantilevered plane truss steel canopy system with curved inner concave back bars, It is characterized in that The supporting structure is a concrete stand structure, and the concrete stand structure is provided with a plurality of supporting columns, and the supporting columns are arranged in a ring shape, and the plane truss steel canopy is fixedly connected to the top of the supporting rod.

7. According to claim 1, a chord-braced reinforced cantilevered plane truss steel canopy system with curved concave back bars, It is characterized in that The lower end of the back rod faces inward, and is provided with a first curved arc and a second curved arc in sequence from top to bottom, and the first curved arc is connected with the second curved arc to form an S-shaped curved arc structure.

8. According to claim 7, a chord-braced reinforced cantilevered plane truss steel canopy system with curved inner concave back bars, It is characterized in that There are a plurality of back rods, which are arranged in sequence to form a ring structure.

9. A chord-branched reinforced cantilevered plane truss steel canopy system with curved concave back bars according to claim 8, It is characterized in that A transverse connecting beam is also provided between adjacent back rods.

10. A chord-branched reinforced cantilevered plane truss steel canopy system with curved concave back bars according to claim 8, It is characterized in that The back rod is also provided with a right-angle fixing piece, and two ends of the right-angle fixing piece are respectively fixedly connected to two ends of the second curved arc.

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