CN211571987U

CN211571987U - Suspension structure for additionally arranging prestressed steel stay cable in steel truss

Info

Publication number: CN211571987U
Application number: CN201922023133.1U
Authority: CN
Inventors: 严力军; 张伟; 何涛
Original assignee: Hong Kong Huayi Design Consultants Shenzhen Ltd
Current assignee: Hong Kong Huayi Design Consultants Shenzhen Ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-09-25
Anticipated expiration: 2029-11-21

Abstract

The utility model relates to an add suspended structure of prestressing force steel cable in steel truss, including steel truss, steel frame roof beam, steel column, prestressing force steel cable, the steel truss is including last chord member, down tube, montant and lower chord member, the montant runs through last chord member and lower chord member to link together last chord member and lower chord member, and the lower extreme of montant aligns through connection from top to bottom with the steel column of hanging down in the floor, the down tube slope is connected between last chord member and lower chord member, lead to the height to pass the prestressing force steel cable in montant and the steel column of steel truss midspan position, the upper and lower both ends of prestressing force steel cable are equipped with stretch-draw end and anchor end respectively, the upper chord member top of stretching the end in the steel truss is fixed, the anchor section is fixed in hangs the steel frame roof beam bottom of bottom in the floor down. If a certain rod piece in the steel truss is subjected to load bearing failure caused by accidents, internal force redistribution can be generated on all the rod pieces in the steel truss, and at the moment, the prestressed steel inhaul cable can instantly bear the pulling force to ensure that the whole structure can still work normally.

Description

Suspension structure for additionally arranging prestressed steel stay cable in steel truss

Technical Field

The utility model relates to an add suspended structure of prestressing force steel cable in steel truss belongs to the innovation technique in suspended structure field.

Background

Based on the requirement of diversified building functions, in public buildings such as businesses and exhibitions with dense personnel, a large-span high-through hollow area is arranged inside a tower. Based on indoor traffic streamline and attitude demand, building function needs will be in the cavity region and be close to upper portion several floor and set up a plurality of air vestibule under the prerequisite of bottom floor to the big space demand to form abundant changeable cubical space. In general, an air gallery supports upper floors by installing several steel trusses at a starting floor. However, the initial floor of the air corridor often has the function requirement of large space of the building, and the arrangement of the diagonal rods in the steel truss can influence the large space. The steel truss is arranged on the top floor, and a plurality of floors are hung downwards to form a suspension structure, so that the large space requirement of the building function of the bottom floor is realized, and a reasonable balance point is found for the coordination and unification of the complex and variable building function and the structural system. Because the pull rod piece of the suspension structure has the problems of low redundancy, high external force resistance sensitivity and the like, once the rod piece in the steel truss or the steel column of the lower suspension floor loses bearing capacity due to an accident, the potential safety hazard that the local part or even the whole of the air corridor collapses continuously can occur. How to improve the stress performance of the suspension structure system, practically achieve safety and reliability, exert the advantages that the suspension structure system can be fully adapted to flexible and changeable building functions, and become the technical bottleneck that the suspension structure of the type can be popularized.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose provides a suspended structure who adds the prestressing force steel cable in the steel truss based on above-mentioned research current situation, the utility model discloses based on increase the prestressing force steel cable on the basis of conventional suspended structure, the structural style is simple, easy implementation, with strong points, it is less to increase the engineering cost proportion, the high mechanical properties of full play prestressing force steel cable tensile strength provides the second way atress for suspended structure and prevents the line, has greatly improved the degree of safety of structural system, and in the aspect of the construction installation, construction process preface is strong, and the installation is convenient, possesses the advantage of promoting in the project of the same type.

The technical scheme of the utility model is that: the utility model relates to an add suspended structure of prestressing force steel cable in steel truss, including steel truss, steel frame roof beam, steel column, prestressing force steel cable, the steel truss is including last chord member, down tube, montant and lower chord member, the montant runs through last chord member and lower chord member to link together last chord member and lower chord member, and the lower extreme of montant aligns through connection from top to bottom with the steel column of hanging down in the floor, the down tube slope is connected between last chord member and lower chord member, lead to the height to pass the prestressing force steel cable in montant and the steel column of steel truss midspan position, the upper and lower both ends of prestressing force steel cable are equipped with stretch-draw end and anchor end respectively, the upper chord member top of stretching the end in the steel truss is fixed, the anchor section is fixed in hangs the steel frame roof beam bottom of bottom in the floor down.

The utility model discloses a structure including steel truss, steel frame roof beam, steel column, prestressing force steel cable sets up a plurality of steel truss intercommunications at tower cavity region top floor promptly to hang the several floor down, realize the requirement of air vestibule building function with the suspended structure form, among the steel truss montant with hang down the steel column in the floor and align through connection from top to bottom. After the integral structure is installed, the vertical rods and the steel columns at the midspan positions of the steel truss are internally provided with the prestressed steel cables in a high-pass mode, after all steel components are installed in place, prestress is applied to the tensioning ends to provide a second stress defense line for the suspension structure, if a certain rod piece in the steel truss is subjected to accidents or bearing failure is caused by construction quality defects and the like, internal force redistribution of all rod pieces in the steel truss can be caused, at the moment, the prestressed steel cables can instantly bear the tension to ensure that the integral structure can still normally work, and the structure system accords with the design concept of continuous collapse prevention and can be used as one of important means for enhancing the safety degree of the suspension structure. The utility model has the advantages of as follows:

1) the utility model discloses under the prerequisite that satisfies the building service function, its structural system possesses the technical characterstic that prevents collapsing in succession.

2) On the premise of meeting the functional requirements of building plane arrangement, the number and the positions of the prestressed steel cables are reasonably determined, and the unification of building functions and a structural system is realized.

3) Once part of components in the steel truss are damaged due to external force and lose bearing capacity, the suspension structure can continuously maintain a stable stress system due to the fact that the prestressed steel cables instantaneously bear pulling force, great convenience can be provided for follow-up maintenance and reinforcement, and construction measure cost is saved.

The utility model is suitable for a set up the cavity region that leads to the height inside the building, and the high-rise building who sets up aerial vestibule again at cavity top part floor height has wide application scope and development space.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a detailed view of the anchoring end of the prestressed steel cable of FIG. 1 at the upper chord of the steel truss;

FIG. 3 is a detailed view of the tension end of the prestressed steel cable located at the lower chord of the steel truss in FIG. 1;

3 FIG. 3 4 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 1 3, 3 illustrating 3 a 3 cross 3- 3 sectional 3 view 3 of 3 a 3 steel 3 column 3 with 3 a 3 prestressed 3 steel 3 cable 3 disposed 3 therein 3; 3

FIG. 5 is a cross-sectional view taken along line B-B in FIGS. 2 and 3, showing a cross-sectional view of the anchoring end and the fixing segment of the prestressed steel cable;

fig. 6 is a plan view of a partial structure of a floor where a steel truss is located, which is applied to practical engineering in embodiment 1 of the present invention;

fig. 7 is a cross-sectional view of C-C in fig. 6, which is a schematic overall cross-sectional view of the embodiment 1 of the present invention applied to practical engineering.

Detailed Description

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings.

As shown in fig. 1, the utility model relates to a suspension structure with prestressed steel cables added in a steel truss, which comprises a steel truss 1, a steel frame beam 2, a steel column 3 and prestressed steel cables 4, the steel truss 1 comprises an upper chord 5, an oblique rod 6, a vertical rod 7 and a lower chord 8, the vertical rod 7 penetrates through the upper chord 5 and the lower chord 8, the upper chord 5 and the lower chord 8 are connected together, the lower end of the vertical rod 7 is vertically aligned and communicated with the steel column 3 in the lower hanging floor, the diagonal rod 6 is obliquely connected between the upper chord 5 and the lower chord 8, the vertical rod 7 and the steel column 3 at the midspan position of the steel truss 1 penetrate through the prestressed steel cable 4 through the inner height, the upper end and the lower end of the prestressed steel cable 4 are respectively provided with a tensioning end 11 and an anchoring end 12, the tensioning end 11 is fixed to the top of the upper chord 5 in the steel truss 1, and the anchoring section 12 is fixed to the bottom of the steel frame beam 2 at the bottommost layer in the lower hanging floor.

The method is characterized in that a plurality of steel trusses 1 are arranged on the top floor of a hollow area of a tower building and communicated, a plurality of floors are hung downwards, the requirement for erecting an overhead corridor is achieved in a suspension structure mode, vertical rods 7 in the steel trusses 1 are vertically aligned and communicated with steel columns 3 in the floors hung downwards, after the whole structure is installed, the vertical rods 7 and the steel columns 3 in the midspan positions of the steel trusses 1 penetrate through prestressed steel cables 4 in a through mode, after all steel members are installed in place, prestress is applied to tension ends 11, a second stress defense line is provided for the suspension structure, if a certain member in the steel trusses 1 is subjected to accidental bearing failure, internal force redistribution of all members in the steel trusses 1 can be caused, at the moment, the prestressed steel cables 4 can instantly bear tension, and the whole structure can still work normally.

The vertical rod 7 is one of the components of the steel truss 1 and is positioned in the height range of the top floor, the steel column 3 is positioned in the height range of the lower hanging floor, and the vertical rod and the steel column are vertically aligned and communicated.

The prestressed steel cable 4 penetrates through the inner spaces of the vertical rod 7 and the steel column 3 in a high-pass mode, and the upper end and the lower end of the prestressed steel cable are respectively provided with a tensioning end 11 and an anchoring end 12 for fixation.

When the vertical rod 7 or the steel column 3 where the prestressed steel cable 4 is located is subjected to external force (such as impact, fire and the like) or quits the working state due to the problems of construction quality defects and the like, the prestressed steel cable 4 can instantly bear tension, which is equivalent to the effect of replacing the vertical rod 7 or the steel column 3, and can continuously maintain a stress system with a stable suspension structure.

When the inclined rod 6 and the vertical rod 7 which are arranged between the adjacent sections of the prestressed steel cable 4 are subjected to external force or quit the working state due to the problems of construction quality defects and the like, the steel truss 1 can generate internal force redistribution to cause the prestressed steel cable 4 to bear the tensile force, and the prestressed steel cable 4 can play a supporting role for the inclined rod 6 or the vertical rod 7 which are arranged between the adjacent sections in the steel truss 1 and quit the working state, so that the suspension structure can still be ensured to keep a stable stress system, and convenience is provided for later maintenance.

In this embodiment, the vertical rod 7 and the steel column 3 are steel pipes having a rectangular or circular cross-sectional shape.

In this embodiment, the corrugated tube 9 is installed on the outer side of the prestressed steel cable 4. The corrugated pipe 9 is used as a protective layer device of the prestressed steel cable 4, the prestressed steel cable 4 penetrates through the corrugated pipe 9 in a processing plant in advance to form an assembled finished member, and the assembled finished member penetrates through the vertical rod 7 and the steel column 3 in place after being transported on site.

In this embodiment, steel truss 1 sets up in the top floor, and the plane is arranged and is located the main axis direction, occupies 1~2 floors along the direction of height. And comprehensively determining the specific apparent span, load and support conditions.

In this embodiment, the prestressed steel cables 4 are preferably arranged in the vertical rods 7 at the midspan positions of the steel trusses 1 and are arranged in a penetrating manner in the floor along the height direction of the whole overhead corridor. Whether the vertical rods 7 at other positions are provided with the prestressed steel cables 4 or not is determined according to specific conditions.

In this embodiment, each of the tensioning end 11 and the anchoring end 12 includes an anchor plate 13 and a nut 14, where the anchor plate 13 is welded above the upper chord 5 and below the steel frame beam 2 at the bottommost layer of the lower hanging floor and located at a position where the vertical rod 7 and the steel column 3 intersect, a through hole through which the prestressed steel cable 4 and the corrugated pipe 9 pass is formed in the anchor plate 13, the nut 14 is sleeved on an outer circumferential ring of the anchor plate 13, and after the prestressed steel cable 4 and the corrugated pipe 9 are installed in place, the nut 14 is screwed on a thread pre-processed by the anchor plate 13 in place. The nut 14 is a steel nut.

In this embodiment, the tensioning end 11 and the anchoring end 12 further include a stiffening rib 16, and the stiffening rib 16 located at the tensioning end 11 is fixed on the inner wall of the vertical rod 7 and located within the height range of the upper chord 5 of the steel truss; the stiffening ribs 16 positioned at the anchoring section 12 are fixed on the inner wall of the steel column 3 and positioned within the height range of the steel frame beam 2 at the bottommost layer of the lower hanging floor.

In this embodiment, the stiffening ribs 16 are disposed along the full height or partial height of the upper chord 5 or the steel-frame girder 2 in the steel truss 1. As the case may be.

In this embodiment, the tensioning end 11 and the anchoring end 12 further include a welding steel protective cover 15, and the welding steel protective cover 15 is sleeved on the outer surface of the nut 14.

In this embodiment, in the areas of the tensioning end 11 and the anchoring section 12, after tensioning is completed in place, the external surfaces of the prestressed steel cable 4, the anchor plate 13 and the nut 14 are uniformly coated with the anti-corrosion grease 10 until the prestressed steel cable, the anchor plate 13 and the nut are completely wrapped and covered. The welding steel protective cover 15 is formed by welding steel plates, the shape of the welding steel protective cover is cylindrical, and the welding steel protective cover 15 is welded on the outer sides of the tensioning end 11 and the anchoring end 12 and is used for wrapping the tensioning end 11 and the anchoring end 12 to play a role of a protective layer.

Fig. 2 is the utility model discloses embodiment 1 prestressing steel cable is located the detailed drawing of anchor end, be 1 prestressing steel cable 4 in being located the steel truss 1 in the structure node detailed drawing of upper chord 5 position promptly, prestressing steel cable 4 passes in bellows 9, arrange between two parties in the inside hollow region of montant 7, for guaranteeing that bellows 9 sets up along vertical lining up, crossing upper chord 5 with it, down tube 6 is all in the disconnection of position of converging, and reserve enough space, guarantee that bellows 9 homoenergetic passes, be located upper chord 5 direction of height, respectively set up 1 group stiffening rib 16 along the orthogonal direction at the inner wall of montant 7, provide reliable support for tensioning end 11.

Fig. 3 is a detailed view of the prestressed steel cable at the tensioning end in embodiment 1 of the present invention, that is, a detailed view of a structural node of the prestressed steel cable 4 at the steel frame position at the bottom layer of the suspended floor in fig. 1, fig. 2 is a region of the tensioning end 11, fig. 3 is a region of the anchoring section 12, and the two are basically identical in terms of structural measures. The floor steel frame beam 2 is disconnected at the position where the corrugated pipe 9 penetrates, and the corrugated pipe 9 is ensured to be vertically communicated.

Fig. 4 is the utility model discloses among 1, the cross section schematic diagram of prestressing force steel cable, 4 cross sectional forms of prestressing force steel cable are rectangle or circular, and wherein bellows 9 sets up between two parties with prestressing force steel cable 4 in steel column 3 is inside, and is contactless with the lateral wall, complete mutual independence.

Fig. 5 is a schematic cross-sectional view of an anchoring end (or a fixed section) of a prestressed steel cable according to embodiment 1 of the present invention, which is substantially the same as fig. 4, and is distinguished by that 2 sets of stiffening ribs 16 are orthogonally and symmetrically welded to an inner wall of a vertical rod 7 or an inner wall of a steel column 3, so as to support a tensioning end 11 or an anchoring section 12.

Fig. 6 is the utility model discloses embodiment 1 is applied to the local structure plane map of the steel truss place floor of actual engineering, the utility model discloses be applied to certain actual engineering, the earthquake intensity of seting up defences 7 degrees, design earthquake grouping first group, field classification II type. The engineering comprises 2 underground layers, 12 above ground layers and an above ground structure main body with the total height of 55.2m, wherein the structure system is a reinforced concrete frame-shear wall structure, and a suspension structure (a steel structure system) is adopted in a partial area. The overall planar arrangement of the tower is trapezoidal, the planar size is 220 multiplied by 62-100.5 m, large-scale hollow areas are arranged on 1-7 floors based on the requirements of the building functions of each floor, the building functions are large exhibition places, the planar size of the hollow areas is 160.8 multiplied by 22-47 m, and the planar arrangement of the structures of each floor is groove-shaped. 3 groups of air galleries are arranged on 8-12 floors, the hollow areas are connected into a whole on the middle upper floors, the width of each group of air galleries is 28-32 m, 3-4 column space spaces are unequal, and the span is 30-47 m. 3-4 steel trusses 1 are respectively arranged on the top floors (11-12 floors) of each group of air corridor and are used as supporting systems, and 8-10 floors are used as lower hanging floors. The upper chord 5 and the lower chord 8 of the steel truss 1 are respectively supported on the section steel concrete columns 18 of the tower buildings on two sides. So that the air corridor forms a suspension structure system. Considering the problem of low redundancy of the suspension structure, the prestressed steel cables 4 are arranged in hollow areas inside the vertical rods 7 in the midspan area of the steel truss 1 and penetrate through the whole floor up and down, so that a second stress defense line is provided for an overhead corridor, the effective safety of the suspension structure system is ensured, and the safety, the reliability and the reasonable stress of the structure system can be ensured.

Fig. 7 is the utility model discloses embodiment 1 is applied to the structural section sketch in the actual engineering, the C-C section drawing in fig. 6 promptly, this actual engineering 1~7 layers are independent two tower buildings in most region, set up aerial vestibule in 8~12 layers and link as an organic wholely, wherein lie in 11~12 layers and set up steel truss 1 as the support system, hang steel column 3 under 8~10 layers through the position that corresponds with montant 7 in the steel truss 1, form the suspended structure system. Inside the montant 7 that is located the steel truss 1 and strides the well position, add prestressing force steel cable 4, provide second way defence line and safety guarantee for suspended structure.

Claims

1. A suspension structure for additionally arranging a prestressed steel cable in a steel truss is characterized by comprising a steel truss (1), a steel frame beam (2), a steel column (3) and a prestressed steel cable (4), wherein the steel truss (1) comprises an upper chord (5), an inclined rod (6), a vertical rod (7) and a lower chord (8), the vertical rod (7) penetrates through the upper chord (5) and the lower chord (8) and connects the upper chord (5) and the lower chord (8) together, the lower end of the vertical rod (7) is vertically aligned and communicated with the steel column (3) in a lower hanging floor, the inclined rod (6) is obliquely connected between the upper chord (5) and the lower chord (8), the vertical rod (7) and the steel column (3) at the midspan position of the steel truss (1) penetrate through the prestressed steel cable (4), and the upper end and the lower end of the prestressed steel cable (4) are respectively provided with a tensioning end (11) and an anchoring end (12), the tensioning end (11) is fixed at the top of the upper chord (5) in the steel truss (1), and the anchoring end (12) is fixed at the bottom of the steel frame beam (2) at the bottommost layer in the lower hanging floor.

2. The suspension structure with the prestressed steel cables additionally arranged in the steel truss according to claim 1, is characterized in that: the vertical rods (7) and the steel columns (3) are steel pipes with rectangular or circular cross sections.

3. The suspension structure with the prestressed steel cables additionally arranged in the steel truss according to claim 1, is characterized in that: the outer side of the prestressed steel inhaul cable (4) is provided with a corrugated pipe (9).

4. The suspension structure with the prestressed steel cables additionally arranged in the steel truss according to claim 1, is characterized in that: the steel truss (1) is arranged on the top floor, is arranged on the plane and is located in the main axis direction, and occupies 1-2 floors in the height direction.

5. The suspension structure with the prestressed steel cables additionally arranged in the steel truss according to claim 1, is characterized in that: the prestressed steel cables (4) are firstly arranged in vertical rods (7) at midspan positions of the steel trusses (1) and are arranged in a penetrating mode in the building along the height direction of the whole overhead corridor.

6. The suspension structure with the prestressed steel cables added in the steel truss according to any one of claims 1 to 5, wherein: the tensioning end (11) and the anchoring end (12) comprise anchor plates (13) and nuts (14), wherein the anchor plates (13) are welded above the upper chord (5) and below the steel frame beam (2) hanging the bottommost floor of the floor, and are located at positions intersected with the vertical rods (7) and the steel columns (3), through holes for the prestressed steel cables (4) and the corrugated pipes (9) to penetrate through are formed in the anchor plates (13), the nuts (14) are sleeved on the outer periphery of the anchor plates (13), and after the prestressed steel cables (4) and the corrugated pipes (9) are installed in place, the nuts (14) are screwed on the threads pre-processed on the anchor plates (13) to be in place.

7. The suspension structure with the prestressed steel cables additionally arranged in the steel truss according to claim 6, is characterized in that: the tensioning end (11) and the anchoring end (12) also comprise stiffening ribs (16), and the stiffening ribs (16) positioned at the tensioning end (11) are fixed on the inner wall of the vertical rod (7) and positioned within the height range of the upper chord (5) of the steel truss; and a stiffening rib (16) positioned at the anchoring end (12) is fixed on the inner wall of the steel column (3) and is positioned in the height range of the steel frame beam (2) at the bottommost layer of the lower hanging floor.

8. The suspension structure with the prestressed steel cables additionally arranged in the steel truss according to claim 7, is characterized in that: the stiffening ribs (16) are arranged along the full height or partial height of the upper chord (5) or the steel frame beam (2) in the steel truss (1).

9. The suspension structure with the prestressed steel cables additionally arranged in the steel truss according to claim 6, is characterized in that: the tensioning end (11) and the anchoring end (12) further comprise welding steel protective covers (15), and the welding steel protective covers (15) are sleeved on the outer surfaces of the nuts (14).

10. The suspension structure with the prestressed steel cables additionally arranged in the steel truss according to claim 6, is characterized in that: and the anti-corrosion grease (10) is coated on the outer surfaces of the prestressed steel cable (4), the anchor plate (13) and the nut (14) after tensioning is completed in place in the areas of the tensioning end (11) and the anchoring end (12).