Belt truss, belt truss manufacturing method and super high-rise building giant frame

Abstract

The present invention relates to a belt truss, a method for manufacturing a belt truss, and a giant frame of a super high-rise building. The belt truss includes an upper chord, a lower chord, and a corrugated steel web. The upper chord is a steel tube concrete upper chord, and the lower chord is a prestressed steel tube concrete core rod. The upper and lower ends of the corrugated steel web are rigidly connected to the upper chord and the lower chord, respectively, to form a belt truss. A number of honeycomb through holes are evenly spaced on the corrugated steel web. The present invention adopts a steel tube concrete upper chord as an upper chord member of the belt truss, which can enhance the compressive bearing capacity and rigidity of the upper chord of the belt truss; adopts a prestressed steel tube concrete core rod as a lower chord member of the belt truss, which can enhance the tensile bearing capacity and rigidity of the lower chord of the belt truss; adopts a corrugated steel web with honeycomb through holes to replace the diagonal web of the belt truss, which can enhance the shear bearing capacity, increase the lighting and permeability of the belt truss, and simplify the construction of the belt truss. The belt truss has excellent force performance and has a good application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of super high-rise building frames, in particular to a belt truss, a belt truss manufacturing method and a super high-rise building giant frame. Background Art

[0002] As the research on super high-rise building structural systems becomes increasingly perfect, super high-rise buildings are being built and completed like mushrooms after a rain. As the "business card" of cities and countries, super high-rise buildings have become a symbol of a country's national spirit and the rise of urban economy.

[0003] As the height of super high-rise buildings increases, the wind and earthquake forces they bear also increase significantly. General building structural systems are unable to cope with them. Super high-rise buildings usually adopt a giant frame-core tube structural system with strong resistance. In the structural system of super high-rise buildings, the core tube is usually inevitable, and its resistance can be strengthened by its size and wall thickness. The problem lies in the choice of its peripheral structure, which must adopt a structural form with strong resistance while also taking into account the need for permeability for lighting and ventilation. Therefore, the best form of the peripheral structure of super high-rise buildings is a giant frame.

[0004] The mega frame system is composed of mega columns, belt trusses, outrigger trusses and sub-frames. The belt trusses are generally set up every 10 or 15 floors. The belt trusses are one of the key components of the mega frame structure. The belt trusses have two main functions: one is to serve as a conversion component to support the sub-frame structure system, and the other is to rigidly connect all mega columns to form a strong lateral force resistance system to resist external horizontal loads.

[0005] At present, belt trusses are usually made of steel structures. However, steel structure belt trusses have disadvantages such as high cost, poor structural stability, low bearing capacity and difficult construction. The engineering community urgently needs to develop a belt truss with a steel tube concrete composite structure and carry out construction technology reform for the belt truss of the giant frame-core tube structure system of super-high-rise buildings. Summary of the invention

[0006] The main purpose of the present invention is to overcome the shortcomings of the prior art and provide a belt truss, a belt truss manufacturing method and a super high-rise building giant frame with high structural rigidity, strong bearing capacity, steel saving, good permeability, novel shape, convenient construction and low cost.

[0007] The present invention adopts the following technical solution:

[0008] A ring-belt truss comprises an upper chord, a lower chord and a corrugated steel web, wherein the upper chord is a steel tube concrete upper chord, the lower chord is a prestressed steel tube concrete core rod, the upper and lower ends of the corrugated steel web are rigidly connected to the upper chord and the lower chord respectively to form a ring-belt truss, and a plurality of honeycomb through holes are evenly spaced on the corrugated steel web.

[0009] Furthermore, the steel tube concrete upper chord includes a hollow steel tube and a solidified concrete block tightly filled in the hollow steel tube.

[0010] Furthermore, the prestressed steel tube concrete core rod includes a hollow steel tube, a plurality of prestressed steel bars that are inserted into the hollow steel tube and evenly arranged, and a solidified concrete block that is tightly filled between the hollow steel tube and the prestressed steel bars.

[0011] Furthermore, the honeycomb through holes are regular hexagonal holes.

[0012] Furthermore, the upper and lower ends of the corrugated steel web are rigidly connected to the upper chord and the lower chord respectively through channel steel connectors.

[0013] Furthermore, two ring-belt trusses are rigidly connected through a plurality of connecting members to form a double-layer ring-belt truss.

[0014] A method for manufacturing a ring-belt truss comprises the following steps:

[0015] Step 1: making a corrugated steel web, directly cutting honeycomb through holes on a flat steel plate, and then bending the steel plate to make a corrugated steel web with honeycomb through holes;

[0016] Step 2: Weld a full-length channel steel connector to the upper end of the corrugated steel web, and weld the hollow steel pipe of the upper chord to the channel steel connector, and then pour concrete into the hollow steel pipe to form a solidified concrete block after the concrete hardens, that is, the steel tube concrete upper chord of the ring belt truss;

[0017] Step 3: weld a full-length channel steel connector at the lower end of the corrugated steel web, and weld the hollow steel pipe of the lower chord to the channel steel connector, then insert the prestressed steel bar into the hollow steel pipe, use a jack to tension the prestressed steel bar, and anchor it on the tensioning pedestal, pour concrete into the hollow steel pipe, and after the concrete hardens, form a solidified concrete block tightly filled between the hollow steel pipe and the prestressed steel bar. After the concrete hardens, release the prestressed steel bar to form the prestressed steel tube concrete mandrel lower chord of the ring belt truss, and the steel tube concrete upper chord, the prestressed steel tube concrete mandrel lower chord, the corrugated steel web and the channel steel connector are rigidly connected as a whole to form a ring belt truss;

[0018] Step 4: Weld a number of connecting components between the two ring-belt trusses to form a double-layer ring-belt truss.

[0019] A giant frame of a super high-rise building comprises two giant frame columns, a plurality of the above-mentioned double-layer belt trusses and a giant diagonal support, wherein the plurality of double-layer belt trusses are arranged between the two giant frame columns at intervals, the two ends of the double-layer belt trusses are rigidly connected to the giant frame columns on both sides, the giant diagonal support is arranged between the two double-layer belt trusses of the upper and lower transition floors, the double-layer belt trusses are also connected to secondary frame columns, and the giant diagonal support is arranged in the gap between the two belt trusses of the double-layer belt trusses.

[0020] Furthermore, the secondary frame column adopts a double-limb column type secondary frame column, and the giant inclined support is arranged between the double-limb columns of the secondary frame column without protruding.

[0021] Furthermore, the mega frame of the super high-rise building also includes secondary frame beams, and the secondary frame beams are rigidly connected to the secondary frame columns.

[0022] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention adopts a steel tube concrete upper chord as an upper chord component of the belt truss, which can enhance the compressive bearing capacity and rigidity of the upper chord of the belt truss; adopts a prestressed steel tube concrete core rod as a lower chord component of the belt truss, which can enhance the tensile bearing capacity and rigidity of the lower chord of the belt truss; adopts a corrugated steel web with honeycomb through holes to replace the diagonal web of the belt truss, which can enhance the shear bearing capacity, increase the lighting and permeability of the belt truss, and simplify the construction of the belt truss.

[0024] The steel tube concrete upper chord combines the advantages of steel tube and concrete. The steel tube constrains the concrete, making the concrete in a three-dimensional compressive state, and the compressive strength of the concrete can be doubled. At the same time, the presence of concrete improves the stability and rigidity of the steel tube. The two work together to greatly improve the bearing capacity. For the super-large span ring belt truss structure, the steel tube concrete upper chord is used to replace the steel structure upper chord. Using steel tube concrete as the upper chord member of the ring belt truss can greatly enhance the compressive bearing capacity and rigidity of the super-large span ring belt truss upper chord, save a lot of steel, and reduce the cost of the structure.

[0025] The lower chord uses a prestressed steel tube concrete core rod, which is composed of a steel tube, concrete inside the tube and prestressed steel bars. It has high tensile bearing capacity and rigidity, and gives full play to the respective advantages of steel tubes, concrete inside the tube and prestressed steel bars, with complementary advantages and synergistic work. The steel tube can be used as the tensile material of the lower chord of the ring-belt truss structure, and can also constrain the concrete inside the steel tube to improve the compressive strength of the concrete inside the tube; the prestressed steel bars in the core rod can be used as the tensile material of the ring-belt truss structure to improve the bearing capacity of the ring-belt truss structure, and also apply pre-compressive stress to the concrete inside the steel tube to improve the crack resistance of the concrete inside the tube, thereby improving the rigidity of the ring-belt truss structure; the concrete inside the tube in the core rod can ensure the anchoring effect of the pre-tensioned prestressed steel bars, ensure that the strength of the high-strength prestressed steel bars can be fully utilized, and can effectively prevent the local buckling of the steel tube. The pressure generated after the prestressed steel bars are released is borne by the concrete inside the tube, avoiding the compression buckling of the outer steel tube, killing two birds with one stone. The use of prestressed steel tube concrete core rods as the lower chord of the ring truss structure of the giant frame system can greatly improve the bearing capacity and stiffness of the super-large span ring truss structure. It has the advantages of concentrated prestressed steel reinforcement, high stiffness, strong bearing capacity, large spanning capacity and low cost.

[0026] The corrugated steel web is used to replace the diagonal web of the belt truss to improve the shear bearing capacity and simplify the construction of the belt truss; multiple honeycomb holes are opened on the corrugated steel web to increase the lighting and permeability of the belt truss, reduce the weight of the corrugated steel web, and save steel. The belt truss of the giant frame structure system of super high-rise buildings needs to have good permeability. Honeycomb holes are set on the corrugated steel web to form a corrugated steel web with honeycomb holes on the abdomen. It has the characteristics of light weight, good permeability, high bearing capacity and high rigidity. Compared with the diagonal web of the steel structure, its construction structure is simple, construction is convenient, corrosion resistance is good, and the shear bearing capacity can be greatly improved.

[0027] The upper and lower ends of the corrugated steel web are connected to the upper chord of the steel tube concrete through the upper end channel steel connector, and are connected to the lower chord of the prestressed steel tube concrete core rod through the lower end channel steel connector, forming a ring truss of the giant frame structure system, which has ingenious design, reasonable force, convenient construction and saves steel.

[0028] The three components of the steel tube concrete upper chord, the prestressed steel tube concrete mandrel lower chord and the corrugated steel web are connected in combination and used in a coordinated manner. The belt truss structure has the advantages of light weight, beautiful and novel shape, good permeability, strong bearing capacity, good stability, high rigidity, convenient construction and low cost. The belt truss structure with a super-large span can be used for super-high-rise buildings, with excellent mechanical performance and good application prospects.

[0029] The double-layer belt truss is connected to the giant frame columns at both ends to ensure the integrity and stability of the giant frame structure system of the super-high-rise building. The giant diagonal support can be easily set in the gap in the middle of the double-layer belt truss to avoid eccentric force and the exposure of the giant diagonal support affecting the building facade. Channel steel connectors are set on the steel tube concrete upper chord of the belt truss structure, which can easily set double-limb secondary frame columns. The double-limb column type secondary frame columns are convenient for the cantilevering of the secondary frame beams. In addition, the double-limb column type secondary frame columns can eliminate the impact of the exposed giant diagonal support dividing the building facade. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a three-dimensional view of a double-layer ring belt truss according to Example 1 of the present invention;

[0031] Figure 2 is a side cross-sectional view of a double-layer ring belt truss according to Example 1 of the present invention;

[0032] Figure 3 is a side cross-sectional view of the installation structure of the lower chord and the channel steel connector of Example 1 of the present invention;

[0033] Figure 4 is a three-dimensional view of a corrugated steel web according to Example 1 of the present invention;

[0034] Figure 5 is a front view of a super high-rise building giant frame according to Embodiment 1 of the present invention;

[0035] Figure 6 It is a partial structural stereoscopic view of a super high-rise building giant frame according to Example 1 of the present invention.

[0036] In the figure: 1. steel tube concrete upper chord, 11. first hollow steel tube, 12. first solidified concrete block, 2. prestressed steel tube concrete core rod lower chord, 21. second hollow steel tube, 22. second solidified concrete block, 23. prestressed steel bar, 3. corrugated steel web, 31. honeycomb through hole, 4. channel steel connector, 5. connecting member, 6. giant frame column, 7. giant inclined support, 8. secondary frame column, 9. secondary frame beam. DETAILED DESCRIPTION

[0037] The present invention is further described below through specific implementation modes.

[0038] Example 1

[0039] Reference Figures 1 to 4A ring-belt truss of the present invention comprises an upper chord, a lower chord and a corrugated steel web 3. The upper chord is a steel tube concrete upper chord 1, the lower chord is a prestressed steel tube concrete mandrel lower chord 2, and a number of regular hexagonal honeycomb through holes 31 are evenly spaced on the corrugated steel web 3. A through-length channel steel connector 4 is provided at the upper and lower ends of the corrugated steel web 3, the upper channel steel connector 4 is welded to the steel tube concrete upper chord 1, and the lower channel steel connector 4 is welded to the prestressed steel tube concrete mandrel lower chord 2. Through the upper and lower channel steel connectors 4, the steel tube concrete upper chord 1, the prestressed steel tube concrete mandrel lower chord 2 and the corrugated steel web 3 are welded into a whole to form a ring-belt truss; the two ring-belt trusses are rigidly connected by a number of connecting members 5 to form a double-layer ring-belt truss, and the connecting members 5 are made of steel pipes.

[0040] The steel tube concrete upper chord 1 comprises a columnar first hollow steel tube 11 and a first cured concrete block 12 tightly filled in the first hollow steel tube.

[0041] The prestressed steel tube concrete core rod lower chord 2 comprises a columnar second hollow steel tube 21 , a plurality of prestressed steel bars 23 penetrating and evenly arranged in the second hollow steel tube 21 , and a second cured concrete block 22 tightly filled between the second hollow steel tube 21 and the prestressed steel bars 23 .

[0042] A method for manufacturing a ring-belt truss of the present invention comprises the following steps:

[0043] Step 1: make a corrugated steel web 3. According to the steel honeycomb beam manufacturing process, directly cut a regular hexagonal honeycomb through hole 31 on a flat steel plate, and then use a steel plate folding machine to bend the steel plate to make a corrugated steel web 3 with honeycomb through holes 31.

[0044] Step 2: Weld a full-length channel steel connector 4 to the upper end of the corrugated steel web 3, and weld the first hollow steel pipe 11 of the upper chord to the channel steel connector 4, then pour concrete into the first hollow steel pipe 11, and after the concrete hardens, form a first solidified concrete block 12, that is, make the steel tube concrete upper chord 1 of the ring belt truss;

[0045] Step three, weld a full-length channel steel connector 4 at the lower end of the corrugated steel web 3, and weld the second hollow steel pipe 21 of the lower chord to the channel steel connector 4, then insert the prestressed steel bar 23 into the second hollow steel pipe 21, use a jack to tension the prestressed steel bar 23, and anchor it on the tensioning pedestal, pour concrete into the second hollow steel pipe 21, and after the concrete hardens, form a solidified concrete block 22 tightly filled between the second hollow steel pipe 21 and the prestressed steel bar 23, and after the concrete hardens, release the prestressed steel bar 23 to form the prestressed steel tube concrete mandrel lower chord 2 of the ring belt truss, and the steel tube concrete upper chord 1, the prestressed steel tube concrete mandrel lower chord 2, the corrugated steel web 3 and the channel steel connector 4 are welded together to form a ring belt truss;

[0046] Step 4: weld multiple connecting components between two ring-belt trusses to form a double-layer ring-belt truss.

[0047] Reference Figure 5 and Figure 6 The present invention discloses a mega frame of a super high-rise building, comprising two mega frame columns 6, a plurality of double-layered ring belt trusses and a mega diagonal support 7. The plurality of double-layered ring belt trusses are arranged between the two mega frame columns 6 at intervals, and the two ends of the double-layered ring belt trusses are rigidly connected to the mega frame columns 6 on both sides. The mega diagonal support 7 is arranged between two adjacent double-layered ring belt trusses of the upper and lower conversion floors, and is arranged in the gap between the two ring belt trusses of the double-layered ring belt trusses. The double-layered ring belt trusses are also connected with a sub-frame column 8 and a sub-frame beam 9. The sub-frame column 8 is a double-limb column type sub-frame column, and the sub-frame beam 9 is welded to the sub-frame column 8. The mega diagonal support 7 is arranged between the double-limb columns of the sub-frame column 8 without protrusion.

[0048] After the double-layer belt truss is manufactured according to the manufacturing method of the belt truss and hoisted into place, the two ends of the double-layer belt truss are welded to the giant frame column 6, and the giant inclined support 7 is set in the middle gap between the two adjacent double-layer belt trusses of the upper and lower conversion floors. The double-layer belt truss is provided with a secondary frame column 8 in the form of a double-limb column, and the secondary frame beam 9 is welded to the secondary frame column 8, so as to form a giant frame structure system of a super high-rise building.

[0049] The present invention is applied to a giant frame-core tube structural system, with a building height of 600 meters, a hexagonal grid tube double steel plate concrete composite shear wall core tube inside, a bottom shear wall core tube thickness of 2.5 meters, and a hexagonal giant frame structural system outside, with a bottom hexagonal steel tube giant column side length of 4 meters.

[0050] The bottom span of the belt truss is 40 meters, the bottom refuge equipment layer height is 5 meters, the height of the belt truss is selected to be 6 meters, and the center distance between the upper and lower chords of the belt truss is 5 meters.

[0051] The first hollow steel tube 11 of the steel tube concrete upper chord 1 is a steel tube with a diameter of 1.2 meters, the steel tube material is Q345 steel, the steel tube wall thickness is 16mm, and C50 concrete is poured inside.

[0052] The second hollow steel tube 21 of the lower chord of the prestressed steel tube concrete core rod adopts a steel tube with a diameter of 1.2 meters and a wall thickness of 20mm. The prestressed steel bar 23 adopts 12 high-strength and low-relaxation φ15.2 steel strands with an ultimate strength of 1860MPa. The steel tube is filled with C50 high-strength concrete and slightly expanding self-compacting concrete.

[0053] The corrugated steel web 3 has a wavelength of 7200mm, a wave height of 800mm, a horizontal length of 2800mm for the straight plate section, a projected length of 800mm for the inclined plate section, a steel plate thickness of 14mm, and a height of 3600mm for the corrugated steel web 3. The corrugated steel web 3 has holes for lighting and ventilation, and honeycomb through holes 31 are arranged on the straight plate section. The web honeycomb hole beam expansion ratio is 1.5, the upper length of the regular hexagonal hole is 800mm, and the middle distance of the regular hexagonal hole is 2000m.

[0054] The channel steel connectors 4 are all No. 100 special channel steels.

[0055] The distance between the two ring-belt trusses is 2.5 meters, the connecting member 5 is a steel pipe with a diameter of 800mm and a wall thickness of 10mm, and the distance between the connecting steel pipe members is 3600mm.

[0056] The distance between the opposite sides of the hexagonal outer steel tube of the hexagonal steel tube concrete-filled giant column is changed from 8 meters to 6 meters, the steel tube wall thickness is changed from 40mm to 16mm, the diameter of the inner circular steel tube is changed from 4 meters to 3 meters, the steel tube wall thickness is changed from 30mm to 12mm, the thickness of the connecting reinforcing steel plate between the hexagonal outer steel tube and the circular inner steel tube is changed from 20mm to 10mm, and the concrete inside the hexagonal steel tube concrete-filled giant column is changed from C80 to C40 concrete.

[0057] The giant inclined support 7 is set between two double-layer ring belt trusses with a spacing of 50 meters, and in the middle gap between the two double-layer ring belt trusses of the upper and lower conversion floors. The bottom giant inclined support 7 adopts a 1800×900mm rectangular steel tube concrete structure with a steel tube wall thickness of 30mm. C60 concrete is poured into the rectangular steel tube.

[0058] The double-column secondary frame column 8 is a 800×800 rigid concrete column with a built-in 600*300 H-shaped steel. The rigid concrete column is cast in C35. The secondary frame beam 9 is an H-shaped steel beam structure, and the floor slab is a cast-in-place corrugated steel plate concrete floor structure.

[0059] Example 2

[0060] The difference between this embodiment and Embodiment 1 is that the giant frame of the super high-rise building in this embodiment does not include a secondary frame beam.

[0061] Example 3

[0062] The difference between this embodiment and Embodiment 1 is that the honeycomb through holes on the corrugated steel web of this embodiment are regular pentagonal through holes.

[0063] Example 4

[0064] The difference between this embodiment and the first embodiment is that the ring-belt truss of this embodiment is formed by three ring-belt trusses being rigidly connected by a plurality of connecting members 5 to form a three-layer ring-belt truss.

[0065] The above are only four specific implementation methods of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A belt truss, comprising an upper chord, a lower chord and a corrugated steel web, characterized in that: The upper chord is a steel tube concrete upper chord, the lower chord is a prestressed steel tube concrete core rod, the upper and lower ends of the corrugated steel web are rigidly connected to the upper chord and the lower chord respectively to form a ring belt truss, and a number of honeycomb through holes are evenly spaced on the corrugated steel web; The steel tube concrete upper chord comprises a hollow steel tube and a solidified concrete block tightly filled in the hollow steel tube; The prestressed steel tube concrete core rod comprises a hollow steel tube, a plurality of prestressed steel bars inserted in the hollow steel tube and evenly arranged, and a solidified concrete block tightly filled between the hollow steel tube and the prestressed steel bars; The honeycomb through holes are regular hexagonal holes; The upper and lower ends of the corrugated steel web are rigidly connected to the upper chord and the lower chord through channel steel connectors respectively.

2. A belt truss according to claim 1, characterized in that: Two ring-belt trusses are rigidly connected through a plurality of connecting members to form a double-layer ring-belt truss.

3. A method for manufacturing a ring-belt truss, characterized in that: The following steps are involved: Step 1: making a corrugated steel web, directly cutting honeycomb through holes on a flat steel plate, and then bending the steel plate to make a corrugated steel web with honeycomb through holes; Step 2: Weld a full-length channel steel connector to the upper end of the corrugated steel web, and weld the hollow steel pipe of the upper chord to the channel steel connector, and then pour concrete into the hollow steel pipe to form a solidified concrete block after the concrete hardens, that is, the steel tube concrete upper chord of the ring belt truss; Step 3: weld a full-length channel steel connector at the lower end of the corrugated steel web, and weld the hollow steel pipe of the lower chord to the channel steel connector, then insert the prestressed steel bar into the hollow steel pipe, use a jack to tension the prestressed steel bar, and anchor it on the tensioning pedestal, pour concrete into the hollow steel pipe, and after the concrete hardens, form a solidified concrete block tightly filled between the hollow steel pipe and the prestressed steel bar. After the concrete hardens, release the prestressed steel bar to form the prestressed steel tube concrete mandrel lower chord of the ring belt truss, and the steel tube concrete upper chord, the prestressed steel tube concrete mandrel lower chord, the corrugated steel web and the channel steel connector are rigidly connected as a whole to form a ring belt truss; Step 4: Weld a number of connecting components between the two ring-belt trusses to form a double-layer ring-belt truss.

4. A mega frame for a super high-rise building, characterized in that: It comprises two giant frame columns, a plurality of double-layer belt trusses as claimed in claim 2 and a giant diagonal support, wherein the plurality of double-layer belt trusses are arranged between the two giant frame columns at intervals, and the two ends of the double-layer belt trusses are rigidly connected to the giant frame columns on both sides, and the giant diagonal support is arranged between the two double-layer belt trusses of the upper and lower transition floors, and the double-layer belt trusses are also connected to secondary frame columns, and the giant diagonal support is arranged in the gap between the two belt trusses of the double-layer belt trusses.

5. A mega frame for a super high-rise building as claimed in claim 4, characterized in that: The secondary frame column adopts a double-limb column type secondary frame column, and the giant inclined support is arranged between the double-limb columns of the secondary frame column without protruding.

6. A mega frame for a super high-rise building as claimed in claim 4 or 5, characterized in that: Also included are secondary frame beams which are rigidly connected to the secondary frame columns.

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