Prestressed steel beam and ultra-thin sandwich floor using the same

Abstract

The present invention provides a prestressed steel beam, comprising a long strip steel, a first limiting portion arranged in the middle of the steel in the length direction, and at least one tensile member connected to the first limiting portion arranged along the length direction of the steel; the first limiting portion is arranged close to the side of the steel subject to tensile stress; there is at least one point on the tensile member, the distance from the side of the steel subject to tensile stress is greater than the distance from the center line of the steel to the side of the steel subject to tensile stress; the tensile member is in a tensioned state to generate tensile stress along the length direction of the tensile member; the first limiting portion is used to apply the resultant force or component force of the tensile stress generated by the tensile member to the steel, so as to offset a part of the pressure borne by the steel. In addition, the present invention also provides an ultra-thin sandwich floor.

Description

Technical Field

[0001] The invention relates to the technical field of construction, in particular to a prestressed steel beam and an ultra-thin sandwich floor using the prestressed steel beam. Background Art

[0002] Disclaimer: Throughout the specification, any discussion of the background art should in no way be considered as an admission that such art is well known or forms part of the common general knowledge in the field.

[0003] As people's living standards continue to improve, people have higher and higher requirements for their living environment. In order to maximize the living space, in the living space with a high floor height, people often choose to transform it into a duplex space, that is, to set a mezzanine in the middle of the living space, and convert part or all of the original single-story living space into a double-story living space, and usually use an overhead mezzanine to increase the spaciousness of the space. However, the stiffness of beams with the same cross-section and material often decreases with the increase of the span. When the span of the beam is large, not only the mechanical properties of the beam cannot meet the construction requirements, but also it will make the residents feel uncomfortable. Therefore, in order to improve the stiffness of the long-span beam, under the existing materials, people often increase the cross-section of the beam or design a responsible mechanical structure to increase the stiffness of the beam, thereby increasing the stiffness of the mezzanine. However, in the above method, the method of increasing the cross-section of the beam will reduce the floor height after the reconstruction, which not only greatly reduces the utilization rate of the indoor space, but also the low floor height often makes the residents feel depressed. Living in such an environment for a long time is not conducive to the physical and mental health of the residents. However, the use of complex mechanical mechanisms is not only complicated to construct, but also requires a high level of construction skills from the workers, resulting in a long construction period and increased uncontrollable factors, but also has serious material consumption and high costs. Summary of the invention

[0004] Based on the above, a prestressed steel beam is provided which can greatly reduce the thickness of the interlayer, so as to improve the floor height and space utilization of the duplex space.

[0005] In addition, the present invention also provides an ultra-thin sandwich floor.

[0006] A prestressed steel beam comprises a long steel, a first limiting portion arranged in the middle of the steel in the length direction, and at least one tensile member connected to the first limiting portion arranged along the length direction of the steel; the first limiting portion is arranged near the side of the steel subject to tensile stress; at least one point on the tensile member is at a distance from the side of the steel subject to tensile stress greater than the distance from the center line of the steel to the side of the steel subject to tensile stress; the tensile member is in a tensioned state to generate tensile stress along the length direction of the tensile member; the first limiting portion is used to apply the resultant force or component force of the tensile stress generated by the tensile member to the steel to offset a part of the pressure borne by the steel. Thereby reducing the tensile stress on the side of the steel subject to tensile stress, improving the rigidity of the steel, and reducing the disturbance of the steel.

[0007] In one embodiment, a first turning portion is provided at the first end of the steel section; a second turning portion is provided at the second end of the steel section; the first end includes a first end face of the steel section, and a portion cut inwardly by a certain distance from the first end face along the length direction of the steel section; the second end includes a second end face of the steel section, and a portion cut inwardly by a certain distance from the second end face along the length direction of the steel section; the first turning portion is connected to the steel section and the tensile member respectively; the second turning portion is connected to the steel section and the tensile member respectively; the first turning portion and the second turning portion are both used to change the setting direction of the tensile member on the steel section, so as to change the direction of the tensile stress on the tensile member after the tensile member is tensioned.

[0008] In one embodiment, a first turning portion is provided at the first end of the steel section; the first end includes a first end face of the steel section, and a portion cut inward by a certain distance from the first end face along the length direction of the steel section; the first turning portion is respectively connected to the steel section and the tensile member; the first turning portion is used to change the setting direction of the tensile member on the steel section, so as to change the direction of the tensile stress on the tensile member after the tensile member is tensioned.

[0009] In one embodiment, a second turning portion is provided at the second end of the steel section; the second end includes the second end face of the steel section, and a portion cut inward by a certain distance from the second end face along the length direction of the steel section; the second turning portion is respectively connected to the steel section and the tensile member; the second turning portion is used to change the setting direction of the tensile member on the steel section, so as to change the direction of the tensile stress on the tensile member after the tensile member is tensioned.

[0010] In one embodiment, it also includes a second limiter disposed in the middle of the length direction of the steel; the second limiter is disposed near the side of the steel subject to tensile stress; the tensile portion includes at least one tensile member connected to the second limiter, and at least one point on the tensile member is at a distance from the side of the steel subject to tensile stress greater than the distance from the center line of the steel subject to the side of the steel subject to tensile stress, the tensile member is in a tensioned state to generate tensile stress along the length direction of the tensile member, and the second limiter is used to apply the resultant force or component force of the tensile stress generated by the tensile member to the steel subject to offset a part of the pressure borne by the steel subject. Thereby reducing the tensile stress on the side of the steel subject to tensile stress, increasing the rigidity of the steel subject, and reducing the disturbance of the steel subject. At the same time, the positions of the second limiter and the first limiter can be adjusted to adapt to different specifications of the steel beam.

[0011] In one embodiment, a first fixing portion is provided at the first end of the steel section; a second fixing portion is provided at the second end of the steel section; the first end includes a first end face of the steel section, and a portion cut inwardly by a certain distance from the first end face along the length direction of the steel section; the second end includes a second end face of the steel section, and a portion cut inwardly by a certain distance from the second end face along the length direction of the steel section; the first fixing portion and the second fixing portion are both provided with a locking mechanism to lock the tensile member in a tensioned state, thereby maintaining the tensioned state of the tensile member.

[0012] In one embodiment, a first fixing portion is provided at the first end of the steel section; the first end includes a first end face of the steel section, and a portion cut inward a certain distance from the first end face along the length direction of the steel section; the first fixing portion is provided with a locking mechanism to lock the tensile member in a tensioned state, thereby maintaining the tensioned state of the tensile member.

[0013] In one embodiment, a second fixing portion is provided at the second end of the steel section; the second end includes a second end face of the steel section, and a portion cut inward by a certain distance from the second end face along the length direction of the steel section; the second fixing portion is provided with a locking mechanism to lock the tensile member in a tensioned state, thereby maintaining the tensioned state of the tensile member.

[0014] In one of the embodiments, a first tensioning portion is provided at the first end of the steel section; the first end includes the first end face of the steel section and a portion cut inwardly by a certain distance from the first end face along the length direction of the steel section; the first tensioning portion includes a first fixing block and a first bolt column assembly; the first fixing block is fixedly connected or detachably connected to the steel section; the first fixing block is provided with a first through hole; the first bolt column assembly includes a first bolt, a first bolt column fixedly connected to one end of the first bolt, and a first nut threadedly connected to the first bolt; the first bolt column is provided with a first force arm connecting portion or a first force arm connecting structure, so that an externally connected force-applying member applies a torque opposite to the rotation direction of the first nut to the first bolt column; the first bolt is gap-connected to the first through hole; by applying a torque opposite to the rotation direction of the first nut to the first bolt column and rotating the first nut, the degree of engagement between the first nut and the first bolt can be increased, thereby causing the first bolt to move along the axial direction of the first through hole to tension the tensile member.

[0015] In one embodiment, the first force arm connection portion includes a prism structure coaxially fixed with the first bolt; the first force arm connection structure is a prism structure formed by the first bolt itself, or is any one of a through hole, a blind hole, a groove, or a boss arranged on the first bolt, or two or more structures.

[0016] In one embodiment, the first lever arm connection portion includes a quadrangular prism structure coaxially fixedly arranged with the first bolt, and the quadrangular prism structure is connected to an external force-applying member to apply a torque opposite to the rotation direction of the first nut to the first bolt. For example, a torque opposite to the rotation direction of the first nut is applied to the quadrangular prism by a wrench.

[0017] In one embodiment, the first force arm connection structure is a quadrangular prism structure formed by the first bolt itself.

[0018] In one of the embodiments, the first force arm connection portion further includes any one of a through hole, a blind hole, a groove, or a boss, or two or more structures, arranged on the quadrangular prism.

[0019] In one embodiment, the first lever arm connection portion includes a hexagonal column structure coaxially fixedly arranged with the first bolt column. The hexagonal column structure is connected to an external force-applying member to apply a torque opposite to the rotation direction of the first nut to the first bolt column. For example, a torque opposite to the rotation direction of the first nut is applied to the hexagonal column by a wrench.

[0020] In one embodiment, the first lever arm connection structure is a hexagonal prism structure formed by the first bolt column itself.

[0021] In one embodiment, the first lever arm connection portion further includes any one of a through hole, a blind hole, a groove, or a boss, or two or more structures, arranged on the hexagonal prism.

[0022] In one embodiment, the cross-sectional shape of the first through hole is an oblong hole or a polygonal hole; the first bolt column, or the first bolt column and the boss, or the first force arm connection portion is axially slidably connected to the first through hole.

[0023] In one embodiment, the first limiting portion includes a second fixing block and a second bolt column assembly; the second fixing block is fixedly connected or detachably connected to the steel section; the second fixing block is provided with a second through hole or a U-shaped slot; the cross-sectional shape of the second through hole or the U-shaped slot is an oblong hole or a polygonal hole; the second bolt column assembly includes a second bolt, a second bolt column fixedly connected to one end of the second bolt, a limiting structure fixedly connected to the other end of the second bolt, and a second nut threadedly connected to the second bolt; the tensile member is connected to the limiting structure so that the limiting structure plays a role in the tensile member The second bolt has a limiting effect, so that the limiting structure applies tensile stress to the tensile member; the second bolt column is provided with a second force arm connecting portion or a second force arm connecting structure, so as to apply a torque opposite to the rotation direction of the second nut to the second bolt column through an externally connected force-applying member; the second bolt is gap-connected with the second through hole; by applying a torque opposite to the rotation direction of the second nut to the second bolt column and rotating the second nut, the degree of engagement between the second nut and the second bolt can be increased, so that the second bolt moves axially along the second through hole, so as to apply a tensioning force from the middle part of the tensile member to tension the tensile member.

[0024] In one embodiment, the second force arm connection portion includes a prismatic structure coaxially fixed with the second bolt; the second force arm connection structure is a prismatic structure formed by the second bolt itself, or is any one of a through hole, a blind hole, a groove, or a boss arranged on the second bolt, or two or more structures.

[0025] In one embodiment, the second lever arm connection portion includes a quadrangular prism structure coaxially fixedly arranged with the second bolt, and the quadrangular prism structure is connected to an external force-applying member to apply a torque opposite to the rotation direction of the second nut to the second bolt. For example, a torque opposite to the rotation direction of the second nut is applied to the quadrangular prism by a wrench.

[0026] In one embodiment, the second force arm connection structure is a quadrangular prism structure formed by the second bolt column itself.

[0027] In one of the embodiments, the second force arm connection portion further includes any one of a through hole, a blind hole, a groove, or a boss, or two or more structures, arranged on the quadrangular prism.

[0028] In one embodiment, the second lever arm connection portion includes a hexagonal column structure coaxially fixedly arranged with the second bolt. The hexagonal column structure is connected to an external force-applying member to apply a torque opposite to the rotation direction of the second nut to the second bolt. For example, a torque opposite to the rotation direction of the second nut is applied to the hexagonal column by a wrench.

[0029] In one embodiment, the second force arm connection structure is a hexagonal prism structure formed by the second bolt column itself.

[0030] In one embodiment, the second lever arm connection portion further includes any one of a through hole, a blind hole, a groove, or a boss, or two or more structures, arranged on the hexagonal prism.

[0031] In one embodiment, the cross-sectional shape of the first through hole is an oblong hole or a polygonal hole; the second bolt column, or the second bolt column and the boss, or the second force arm connection portion is axially slidably connected to the first through hole.

[0032] In one embodiment, the cross-sectional shape of the second through hole is an oblong hole or a polygonal hole;

[0033] The second bolt column, or the second bolt column and the boss, or the second force arm connecting portion is axially slidably connected with the second through hole.

[0034] In one embodiment, the limiting structure is a closed circular ring.

[0035] In one embodiment, the limiting structure is a hook-shaped structure.

[0036] In one embodiment, the limiting structure is a lock.

[0037] In one embodiment, the tensile member is a steel bar.

[0038] In one embodiment, the tensile member is a steel wire.

[0039] In one embodiment, the tensile member is a steel strand.

[0040] In one embodiment, the tensile member is a combination of two or more of steel bars, steel wires or steel strands.

[0041] In one embodiment, the steel section is square steel.

[0042] In one embodiment, the steel section is an I-shaped steel section.

[0043] In one embodiment, the steel section is an "H"-shaped steel section.

[0044] In one embodiment, the steel section is a "U"-shaped steel section.

[0045] In one of the embodiments, the steel section is "Ⅱ" steel section.

[0046] In one of the embodiments, the steel section is "III" steel section.

[0047] In one embodiment, the steel section is a combination of two or more of square steel, I-shaped steel, H-shaped steel, U-shaped steel, II-shaped steel or III-shaped steel.

[0048] In one of the embodiments, a second tensioning portion is provided at the second end of the steel section; the second end includes the second end face of the steel section and a portion cut inwardly by a certain distance from the second end face along the length direction of the steel section; the second tensioning portion includes a third fixing block and a third bolt column assembly; the third fixing block is fixedly connected or detachably connected to the steel section; the third fixing block is provided with a third through hole; the third bolt column assembly includes a third bolt, a third bolt column fixedly connected to one end of the third bolt, and a third nut threadedly connected to the third bolt; the third bolt column is provided with a third force arm connecting portion or a third force arm connecting structure, so that the externally connected force-applying member applies a torque opposite to the rotation direction of the third nut to the third bolt column; the third bolt is gap-connected to the third through hole; by applying a torque opposite to the rotation direction of the third nut to the third bolt column and rotating the third nut, the degree of engagement between the third nut and the third bolt can be increased, so that the third bolt moves along the axial direction of the third through hole to tension the tensile member.

[0049] In one embodiment, the third lever arm connection portion includes a prism structure coaxially fixed to the third bolt column; the third lever arm connection structure is a prism structure formed by the third bolt column itself, or is any one of a through hole, a blind hole, a groove, or a boss arranged on the third bolt column, or two or more structures.

[0050] In one embodiment, the third lever arm connection portion includes a quadrangular prism structure coaxially fixedly arranged with the third bolt, and the quadrangular prism structure is connected to an external force-applying member to apply a torque opposite to the rotation direction of the third nut to the third bolt. For example, a torque opposite to the rotation direction of the third nut is applied to the quadrangular prism by a wrench.

[0051] In one embodiment, the third lever arm connection structure is a quadrangular prism structure formed by the third bolt column itself.

[0052] In one of the embodiments, the third lever arm connection portion further includes any one of a through hole, a blind hole, a groove, or a boss, or two or more structures, arranged on the quadrangular prism.

[0053] In one embodiment, the third lever arm connection portion includes a hexagonal prism structure coaxially fixedly arranged with the third bolt. The hexagonal prism structure is connected to an external force-applying member to apply a torque opposite to the rotation direction of the third nut to the third bolt. For example, a torque opposite to the rotation direction of the third nut is applied to the hexagonal prism by a wrench.

[0054] In one embodiment, the third lever arm connection structure is a hexagonal prism structure formed by the third bolt column itself.

[0055] In one of the embodiments, the third lever arm connection portion further includes any one of a through hole, a blind hole, a groove, or a boss, or two or more structures, arranged on the hexagonal prism.

[0056] In one embodiment, the cross-sectional shape of the first through hole is an oblong hole, or a polygonal hole; the third bolt column, or the third bolt column and the boss, or the third force arm connecting portion is axially slidably connected to the first through hole.

[0057] In one embodiment, the cross-sectional shape of the third through hole is an oblong hole or a polygonal hole;

[0058] The third bolt column, or the third bolt column and the boss, or the third force arm connecting portion is axially slidably connected with the third through hole.

[0059] The prestressed steel beam provided above is provided with a first limiter in the middle of the long strip steel in the length direction, and at least one tensile member connected to the first limiter is provided along the length direction of the steel; the first limiter is provided close to the side of the steel subject to tensile stress; there is at least one point on the tensile member whose distance to the side of the steel subject to tensile stress is greater than the distance from the center line of the steel subject to the side of the steel subject to tensile stress; the tensile member is in a tensioned state to generate tensile stress along the length direction of the tensile member. With such a configuration, the first limiter can apply the resultant force or component force of the tensile stress generated by the tensile member to the steel to offset a part of the pressure borne by the steel. Thereby reducing the tensile stress on the side of the steel subject to tensile stress, improving the rigidity of the steel, and reducing the disturbance of the steel.

[0060] According to the above content, the present invention also provides an ultra-thin sandwich floor.

[0061] An ultra-thin mezzanine floor comprises a main beam horizontally arranged within the same horizontal height range, a secondary beam horizontally arranged and connected to the main beam at a certain angle, a floor layer group arranged above the main beam and the secondary beam, and a ceiling layer group arranged below the main beam and the secondary beam; it also comprises a ceiling mounting block connected to the outer side wall of the main beam and / or the secondary beam; the floor layer group is connected to the upper surface of the main beam and / or the secondary beam; the ceiling layer group is connected to the lower surface of the ceiling mounting block; the main beam is the prestressed steel beam described in any one of the above embodiments.

[0062] In one embodiment, the ceiling mounting block is connected to only one outer side wall of the main beam, that is, only one side of the ceiling mounting block is connected to the outer side wall of the main beam.

[0063] In one embodiment, the ceiling mounting block is connected to only one outer side wall of the secondary beam, that is, only one side of the ceiling mounting block is connected to the secondary side of the main beam.

[0064] In one embodiment, the ceiling mounting block is connected to two adjacent main beams at the same time, that is, both ends of the ceiling mounting block are respectively connected to the outer side walls of two adjacent main beams.

[0065] In one embodiment, the ceiling mounting block is connected to two adjacent secondary beams at the same time, that is, two ends of the ceiling mounting block are respectively connected to the outer side walls of two adjacent secondary beams.

[0066] In one embodiment, the ceiling mounting block is connected to both the main beam and the secondary beam, that is, one end of the two ends of the ceiling mounting block is connected to the outer wall of the main beam, and the other end is connected to the outer wall of the secondary beam.

[0067] In one embodiment, the secondary beam is a steel beam.

[0068] In one embodiment, the secondary beam is a steel beam provided with prestress, and the prestress is provided in the same manner as the prestress of the main beam.

[0069] In one embodiment, the ceiling mounting block is a prismatic wooden block.

[0070] In one embodiment, the floor layer group includes a patterned steel plate, a rubber pad and a floor; the foot pad is arranged between the patterned steel plate and the floor; the patterned steel plate is fixedly connected to the upper surface of the main beam; the ceiling layer group includes a top plate fixedly connected to the ceiling mounting block; the lower surface of the top plate is used to set a decorative layer.

[0071] In one embodiment, the floor layer group includes a patterned steel plate, a rubber pad and a floor; the foot pad is arranged between the patterned steel plate and the floor; the patterned steel plate is fixedly connected to the upper surface of the secondary beam; the ceiling layer group includes a top plate fixedly connected to the ceiling mounting block; the lower surface of the top plate is used to set a decorative layer.

[0072] In one embodiment, the floor layer group includes a patterned steel plate, a rubber pad and a floor; the foot pad is arranged between the patterned steel plate and the floor; the patterned steel plate is fixedly connected to the upper surfaces of the main beam and the secondary beam at the same time; the ceiling layer group includes a top plate fixedly connected to the ceiling mounting block; the lower surface of the top plate is used to set a decorative layer.

[0073] In one embodiment, the thickness of the main beam is 25 mm to 45 mm.

[0074] The ultra-thin sandwich floor provided above can effectively improve the rigidity of the main beam and reduce the disturbance of the steel main beam by setting prestress on the steel main beam. Therefore, the thickness of the steel main beam can be greatly reduced while ensuring the rigidity of the steel main beam. Furthermore, the thickness of the building sandwich constructed by using such prestressed steel beam is greatly reduced, thereby releasing the building space and maximizing the use of the limited building space.

[0075] In the above content, at least in some embodiments, the purpose of the present invention is to overcome or improve at least one disadvantage of the prior art, or to provide a useful alternative. The collection of overview embodiments provided is to predict potential patent claims based on the selection of technical features disclosed in the following "Detailed Description", and these collections of overview embodiments are not intended to limit the scope of the claims that can be expanded in any way. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 A schematic diagram of the main structure of a prestressed steel beam prestressing arrangement method provided in an embodiment;

[0077] Figure 2 A schematic diagram of a top view of a prestressed steel beam prestressing arrangement method provided in an embodiment;

[0078] Figure 3 A schematic diagram of a three-dimensional structure of a prestressed square steel beam prestressing arrangement method provided in an embodiment;

[0079] Figure 4 A schematic diagram of an enlarged side view of a prestressing setting method of a prestressed steel beam provided in an embodiment;

[0080] Figure 5 A schematic diagram of the main structure of a prestressed steel beam prestressing arrangement method provided in an embodiment;

[0081] Figure 6 A schematic diagram of the main structure of a prestressed steel beam prestressing arrangement method provided in an embodiment;

[0082] Figure 7 A schematic diagram of the main structure of a prestressing setting method of a prestressed steel beam provided with a prestressing tensioning mechanism according to an embodiment;

[0083] Figure 8 A schematic diagram of a front cross-sectional structure of a prestressed square steel beam provided in an embodiment, wherein a prestressed force is provided inside the beam and a tensioning mechanism is provided outside the end;

[0084] Fig. 9 It is an enlarged cross-sectional schematic diagram of the end structure of a prestressed square steel beam provided in an embodiment, in which a prestress is arranged inside and a tensioning mechanism is arranged inside the end;

[0085] Fig.10 This is a schematic diagram of an enlarged AA cross-sectional structure of a prestressed square steel beam provided in an embodiment, in which a prestress is provided inside and a tensioning mechanism is provided inside the end;

[0086] Fig.11 A schematic diagram of a side cross-sectional structure of a fixing block at the end of a prestressed square steel beam provided in an embodiment;

[0087] Fig.12 This is a schematic diagram of the front view structure of a fixing block at the end of a prestressed square steel beam provided by an embodiment;

[0088] Fig.13 A schematic diagram of a three-dimensional structure of a fixing block at the end of a prestressed square steel beam provided in an embodiment;

[0089] Fig.14A schematic diagram of a bolt column structure provided with a prismatic force arm connection structure provided in an embodiment;

[0090] Fig.15 A schematic diagram of a front cross-sectional structure of a prestressing arrangement method in which a prestressing tensioning mechanism is arranged inside a prestressed square steel beam provided in an embodiment;

[0091] Fig.16 It is an enlarged cross-sectional schematic diagram of the end structure of a prestressed square steel beam provided in an embodiment, in which a prestressed tensioning mechanism is provided inside the prestressed square steel beam;

[0092] Fig.17 A schematic diagram of a side cross-sectional structure of a fixing block at the end of a prestressed square steel beam provided in an embodiment;

[0093] Fig.18 This is a schematic diagram of the front view structure of a fixing block at the end of a prestressed square steel beam provided by an embodiment;

[0094] Fig.19 A schematic diagram of a three-dimensional structure of a fixing block at the end of a prestressed square steel beam provided in an embodiment;

[0095] Fig. 20 A schematic diagram of a bolt column structure provided with a hexagonal lever arm connection portion provided in an embodiment;

[0096] Fig.21 A schematic diagram of the middle three-dimensional structure of a prestressed square steel beam provided in an embodiment, in which a prestressed force is arranged on the outside and a tensioning mechanism is arranged in the middle;

[0097] Fig. 22 A schematic diagram of a three-dimensional structure of a prestressed I-shaped steel beam prestressing arrangement method provided in an embodiment;

[0098] Fig.23 A schematic diagram of an enlarged side view of a prestressing setting method of a prestressed I-shaped steel beam provided in an embodiment;

[0099] Fig.24 A schematic diagram of a three-dimensional structure of a prestressed I-shaped steel beam prestressing arrangement method provided in an embodiment;

[0100] Fig.25 A schematic diagram of an enlarged side view of a prestressing setting method of a prestressed I-shaped steel beam provided in an embodiment;

[0101] Fig.26 A schematic diagram of a three-dimensional structure of a prestressed "Ⅱ" type steel beam prestressing setting method provided in an embodiment;

[0102] Fig. 27 It is an enlarged schematic diagram of the side view structure of the prestressing setting method of the prestressed "Ⅱ" type steel beam provided in an embodiment;

[0103] Fig.28 A schematic diagram of a three-dimensional structure of a prestressed "Ⅱ" type steel beam prestressing setting method provided in an embodiment;

[0104] Fig.29 It is an enlarged schematic diagram of the side view structure of the prestressing setting method of the prestressed "Ⅱ" type steel beam provided in an embodiment;

[0105] Fig.30 A three-dimensional structural diagram of a prestressed "III" type steel beam prestressing setting method provided in an embodiment;

[0106] Fig.31 A schematic diagram of an enlarged side view of the prestressing setting method of a prestressed "III" type steel beam provided in an embodiment;

[0107] Fig.32 A three-dimensional structural diagram of a prestressed "III" type steel beam prestressing setting method provided in an embodiment;

[0108] Fig.33 A schematic diagram of an enlarged side view of the prestressing setting method of a prestressed "III" type steel beam provided in an embodiment;

[0109] Fig.34 A schematic diagram of the main structure of a prestressing arrangement of a two-section prestressed steel beam with a support in the middle provided in an embodiment;

[0110] Fig.35 A schematic diagram of the cross-sectional structure of an ultra-thin sandwich floor constructed with prestressed steel beams provided in one embodiment.

[0111] Description of reference numerals: 100. steel; 200. first turning portion; 300. first limiting portion; 310. second fixing block; 311. second through hole; 320. second bolt; 330. second fastening column; 331. second fastening column body; 332. second lever arm connecting portion; 340. second nut; 350. limiting structure; 400. second turning portion; 500. tensile member; 600. first tensioning portion; 610. first fixing block; 611. first through hole; 612. first fixing block connecting portion; 620 .First bolt; 630.First tether column; 631.First tether column body; 632.First lever arm connection portion; 633.First tether column connection portion; 634.Through hole; 650.First connecting member; 700.Second tensioning portion; 710.Third fixing block; 711.Third through hole; 720.Third bolt; 730.Third tether column; 731.Third tether column body; 732.Third lever arm connection portion; 740.Third nut; 750.Second connecting member; 800.Second limiting portion; 900.Third steering portion. DETAILED DESCRIPTION

[0112] In this patent document, the following discussion Figure 1-35 The various embodiments used to describe the principles or methods of the present disclosure are for illustration only and should not be interpreted as limiting the scope of the present disclosure in any way. It should be understood by those skilled in the art that the principles or methods of the present disclosure can be implemented in any appropriately arranged steel beams and steel beam sandwich floor structures. With reference to the accompanying drawings, preferred embodiments of the present disclosure will be described below. In the following description, detailed descriptions of well-known functions or configurations will be omitted so as not to obscure the subject matter of the present disclosure with unnecessary details. Moreover, the terms used herein will be defined according to the functions of the present invention. Therefore, the terms may differ depending on the intention or usage of the user or operator. Therefore, the terms used herein must be understood based on the descriptions made herein.

[0113] A prestressed steel beam, such as Figure 1 or Figure 2 or Figure 3 As shown, it includes a long strip steel 100, a first limiting portion 300 arranged in the middle of the length direction of the steel 100, and at least one tensile member 500 connected to the first limiting portion 300 arranged along the length direction of the steel 100. The first limiting portion 300 is arranged close to the side of the steel 100 that bears tensile stress. There is at least one point on the tensile member 500, and the distance to the side of the steel 100 that bears tensile stress is greater than the distance from the center line of the steel 100 to the side of the steel 100 that bears tensile stress. The tensile member 500 is in a tensioned state to generate tensile stress along the length direction of the tensile member 500. The first limiting portion 300 is used to apply the resultant force or component force of the tensile stress generated by the tensile member 500 to the steel 100 to offset a part of the pressure borne by the steel 100. Thereby reducing the tensile stress on the side of the steel 100 that bears tensile stress, improving the rigidity of the steel 100, and reducing the disturbance of the steel 100.

[0114] In one embodiment, if Figure 1 or Figure 2 or Figure 3 As shown, the first end of the steel section 100 is provided with a first turning portion 200. The second end of the steel section 100 is provided with a second turning portion 400. The first end includes the first end face of the steel section 100, and a portion of the first end face intercepted inwardly along the length direction of the steel section 100 by a certain distance. The second end includes the second end face of the steel section 100, and a portion of the second end face intercepted inwardly along the length direction of the steel section 100 by a certain distance. The first turning portion 200 is connected to the steel section 100 and the tensile member 500, respectively. The second turning portion 400 is connected to the steel section 100 and the tensile member 500, respectively. The first turning portion 200 and the second turning portion 400 are both used to change the setting direction of the tensile member 500 on the steel section 100, so as to change the direction of the tensile stress on the tensile member 500 after the tensile member 500 is tensioned.

[0115] In one embodiment, if Figure 1 or Figure 2 or Figure 3 As shown, the first end of the steel section 100 is provided with a first turning portion 200. The first end includes the first end face of the steel section 100 and a portion cut inwardly by a certain distance from the first end face along the length direction of the steel section 100. The first turning portion 200 is connected to the steel section 100 and the tensile member 500 respectively. The first turning portion 200 is used to change the setting direction of the tensile member 500 on the steel section 100, so as to change the direction of the tensile stress on the tensile member 500 after the tensile member 500 is tensioned.

[0116] In one embodiment, if Figure 1 or Figure 2 or Figure 3 As shown, the second end of the steel section 100 is provided with a second turning portion 400. The second end includes the second end face of the steel section 100 and a portion cut inwardly by a certain distance from the second end face along the length direction of the steel section 100. The second turning portion 400 is connected to the steel section 100 and the tensile member 500 respectively. The second turning portion 400 is used to change the setting direction of the tensile member 500 on the steel section 100, so as to change the direction of the tensile stress on the tensile member 500 after the tensile member 500 is tensioned.

[0117] In one embodiment, if Figure 1 or Figure 3 As shown, the first limiter 300 and the tension member 500 for setting the prestress are arranged on the same side of the steel beam, and a continuous tension member is used. Such arrangement is not only simple and easy to manufacture, but also the setting of the prestress itself does not generate harmful torque.

[0118] In one embodiment, if Figure 2 As shown, the first limiter 300 for setting the prestress is respectively arranged on two opposite sides of the steel beam, or the first limiter 300 passes through two opposite sides of the steel beam. Accordingly, two tension members are respectively arranged on two opposite sides of the steel beam. Such an arrangement is not only simple, but also easy to manufacture.

[0119] In one embodiment, if Figure 4 As shown, the first limiter 300, the tensile member 500, and the fixing member for fixing the tensile member 500 and maintaining the tensile member 500 are provided on both sides of the steel beam 100. The first limiter 300 and the tensile member 500 are provided on both sides of the steel beam, so that the prestressed structure can be symmetrical, which helps to make the steel beam evenly stressed and improve the mechanical stability.

[0120] In one embodiment, if Figure 5 or Figure 6As shown, it also includes a second limiting portion 800 arranged in the middle of the length direction of the steel section 100. The second limiting portion 800 is arranged close to the side of the steel section 100 that bears tensile stress. The tensile portion includes at least one tensile member 500 connected to the second limiting portion 800, and there is at least one point on the tensile member 500 whose distance to the side of the steel section 100 that bears tensile stress is greater than the distance from the center line of the steel section 100 to the side of the steel section 100 that bears tensile stress. The tensile member 500 is in a tensioned state to generate tensile stress along the length direction of the tensile member 500. The second limiting portion 800 is used to apply the resultant force or component force of the tensile stress generated by the tensile member 500 to the steel section 100 to offset a part of the pressure borne by the steel section 100. Thereby reducing the tensile stress on the side of the steel section 100 that bears tensile stress, improving the rigidity of the steel section 100, and reducing the disturbance of the steel section 100. At the same time, different specifications of the steel beam can be adapted by adjusting the positions of the second limiting portion 800 and the first limiting portion 300 .

[0121] In one embodiment, if Figure 5 As shown, the first limit portion 300 and the second limit portion 800 are arranged in the same horizontal plane, and the same tensile member 500 passes through the first limit portion 300 and the second limit portion 800 at the same time. Such an arrangement can make the force magnitude and direction of the first limit portion 300 and the second limit portion 800 the same. Such an arrangement can improve the adjustment adaptability of the prestressed steel beam for different use occasions and increase the application range of the prestressed steel beam.

[0122] In one embodiment, if Figure 6 As shown, the first limiting portion 300 and the second limiting portion 800 are arranged in the same horizontal plane, and each tensile member 500 is connected to only one of the limiting portions, that is, the first limiting portion 300 and the second limiting portion 800 are independently connected to the tensile member 500, and the prestress generated by the two are independent of each other (the tension on the two tensile members 500 can be the same or different, and correspondingly, the prestress applied by the first limiting portion 300 and the second limiting portion 800 on the steel section can be the same or different.) With such a configuration, different prestresses can be applied to different positions of the steel section beam for different usage scenarios.

[0123] In one embodiment, a first fixing portion is provided at the first end of the steel section 100. A second fixing portion is provided at the second end of the steel section 100. The first end includes a first end face of the steel section 100 and a portion cut inwardly by a certain distance from the first end face along the length direction of the steel section 100. The second end includes a second end face of the steel section 100 and a portion cut inwardly by a certain distance from the second end face along the length direction of the steel section 100. Both the first fixing portion and the second fixing portion are provided with a locking mechanism to lock the tension member 500 in a tensioned state, thereby maintaining the tensioned state of the tension member 500.

[0124] In one embodiment, a first fixing portion is provided at the first end of the steel section 100. The first end includes a first end face of the steel section 100 and a portion cut inwardly by a certain distance from the first end face along the length direction of the steel section 100. The first fixing portion is provided with a locking mechanism to lock the tensile member 500 in a tensioned state, thereby maintaining the tensile member 500 in a tensioned state.

[0125] In one embodiment, a second fixing portion is provided at the second end of the steel section 100. The second end includes a second end face of the steel section 100 and a portion cut inwardly by a certain distance from the second end face along the length direction of the steel section 100. The second fixing portion is provided with a locking mechanism to lock the tension member 500 in a tensioned state, thereby maintaining the tensioned state of the tension member 500.

[0126] In one embodiment, if Figure 7 or Figure 8 As shown, the first end of the steel section 100 is provided with a first tensioning portion 600. The first end includes a first end surface of the steel section 100 and a portion cut inwardly by a certain distance from the first end surface along the length direction of the steel section 100. Fig. 9 As shown, the first tensioning part 600 includes a first fixing block 610 and a first bolt 620 column assembly. The first fixing block 610 is fixedly connected or detachably connected to the steel section 100. Fig.11 or Fig.12 or Fig.13 As shown, the first fixing block 610 is provided with a first through hole 611. Fig. 9 As shown, the first bolt 620 column assembly includes a first bolt 620, a first bolt column 630 fixedly connected to one end of the first bolt 620, and a first nut threadedly connected to the first bolt 620. The first bolt column 630 is provided with a first force arm connection portion 632 or a first force arm connection structure, so that the externally connected force-applying member applies a torque opposite to the rotation direction of the first nut to the first bolt column 630. The first bolt 620 is gap-connected with the first through hole 611. By applying a torque opposite to the rotation direction of the first nut to the first bolt column 630 and rotating the first nut, the engagement degree between the first nut and the first bolt 620 can be increased, so that the first bolt 620 moves along the axial direction of the first through hole 611 to tighten the tensile member 500.

[0127] In one embodiment, if Fig.14 As shown, the first lever arm connection portion 632 includes a prism structure coaxially fixedly arranged with the first bolt 630. The first lever arm connection structure is a prism structure formed by the first bolt 630 itself (such as Fig.14 The first fastening column body 631 of the quadrangular prism structure shown in the figure has a rectangular cross section. Such a configuration can facilitate the application of torque to the first fastening column 630 by external force to rotate the first nut 640 to tighten the tension member 500.

[0128] In one embodiment, if Fig. 20 As shown, the first lever arm connection structure is any one of through holes, blind holes, grooves, or bosses, or two or more structures, arranged on the first bolt column 630. Such an arrangement can increase the types and ranges of external connection tools of the first lever arm connection structure and improve operability.

[0129] In one embodiment, the first lever arm connection portion 632 includes a quadrangular prism structure coaxially fixedly arranged with the first bolt column 630, and the quadrangular prism structure is connected to the external force-applying member to apply a torque opposite to the rotation direction of the first nut to the first bolt column 630. For example, a torque opposite to the rotation direction of the first nut is applied to the quadrangular prism by a wrench.

[0130] In one embodiment, if Fig.14 As shown, the first force arm connection structure is a quadrangular column structure formed by the first tethering column 630 itself (ie, a quadrangular column structure formed by the first tethering column body 631 itself).

[0131] In one embodiment, the first force arm connection portion 632 further includes any one of a through hole, a blind hole, a groove, or a boss, or two or more structures, which are arranged on a quadrangular prism.

[0132] In one embodiment, if Fig. 20 As shown, the first force arm connecting portion 632 includes a hexagonal column structure coaxially fixedly arranged with the first bolt column 630 (that is, the first bolt column body 631 is coaxially connected to the hexagonal column). The hexagonal column structure is connected to the external force-applying member to apply a torque opposite to the rotation direction of the first nut to the first bolt column 630. For example, a torque opposite to the rotation direction of the first nut is applied to the hexagonal column by a wrench.

[0133] In one embodiment, the first force arm connection structure is a hexagonal column structure formed by the first bolt column 630 itself (ie, a hexagonal column structure formed by the first bolt column body 631 itself).

[0134] In one embodiment, the first lever arm connection portion 632 further includes any one of a through hole, a blind hole, a groove, or a boss, or two or more structures, arranged on the hexagonal prism.

[0135] In one embodiment, the cross-sectional shape of the first through hole 611 is an oblong hole (eg Fig.12 or Fig.13 ), or polygonal holes (as shown Fig.15 or Fig.16 or Fig.17 or Fig.18The first bolt 630, or the first bolt 630 and the boss, or the first lever connecting portion 632 is axially slidably connected to the first through hole 611. In this way, the first fixing block 610 itself can be used to apply a torque opposite to the rotation direction of the first nut 640 to the first bolt 630.

[0136] In one embodiment, if Fig.14 or Fig. 20 As shown, one end of the first bolt body 631 is connected to the first bolt 620 , and the other end is provided with a first bolt connecting portion 633 having an annular groove along the circumferential direction, so as to be connected to the tensile member 500 through the first connecting member 650 .

[0137] In one embodiment, if Fig.21 As shown, the first limiting portion 300 includes a second fixing block 310 and a second bolt 320 column assembly. The second fixing block 310 is fixedly connected or detachably connected to the steel section 100. The second fixing block 310 is provided with a second through hole 311 or a U-shaped slot. The cross-sectional shape of the second through hole 311 or the U-shaped slot is an oblong hole, or a polygonal hole. The second bolt 320 column assembly includes a second bolt 320, a second bolt column 330 fixedly connected to one end of the second bolt 320, a limiting structure 350 fixedly connected to the other end of the second bolt 320, and a second nut 340 threadedly connected to the second bolt 320. The tensile member 500 is connected to the limiting structure 350 so that the limiting structure 350 plays a limiting role on the tensile member 500, so that the limiting structure 350 applies tensile stress to the tensile member 500. The second bolt column 330 is provided with a second force arm connection portion 332 or a second force arm connection structure, so that the externally connected force applying member applies a torque opposite to the rotation direction of the second nut 340 to the second bolt column 330. The second bolt 320 is gap-connected with the second through hole 311. By applying a torque opposite to the rotation direction of the second nut 340 to the second bolt column 330 and rotating the second nut 340, the degree of engagement between the second nut 340 and the second bolt 320 can be increased, so that the second bolt 320 moves along the axial direction of the second through hole 311, so as to apply a tensioning force from the middle of the tensile member 500 to tension the tensile member 500.

[0138] In one embodiment, if Fig.21 As shown, the second lever arm connection part 332 includes a prism structure coaxially fixedly arranged with the second tether column 330 (ie, the second tether column body 331 is coaxially connected with the prism structure). The second lever arm connection structure is a prism structure formed by the second tether column 330 itself.

[0139] In one embodiment, the second lever arm connection portion 332 includes a prism structure coaxially fixedly disposed with the second bolt 330. The second lever arm connection structure is any one of a through hole, a blind hole, a groove, or a boss disposed on the second bolt 330, or two or more structures.

[0140] In one embodiment, the second lever arm connection portion 332 includes a quadrangular prism structure coaxially fixedly arranged with the second bolt column 330, and the quadrangular prism structure is connected to the external force-applying member to apply a torque opposite to the rotation direction of the second nut 340 to the second bolt column 330. For example, a torque opposite to the rotation direction of the second nut 340 is applied to the quadrangular prism by a wrench.

[0141] In one embodiment, the second force arm connection structure is a quadrangular column structure formed by the second bolt column 330 itself (ie, a hexagonal column structure formed by the second bolt column body 331 itself). This arrangement is convenient for processing and manufacturing.

[0142] In one embodiment, the second lever arm connection portion 332 further includes any one of through holes, blind holes, grooves, or bosses, or two or more structures, which are arranged on the quadrangular prism. Such an arrangement can increase the types and ranges of external connection tools of the first lever arm connection structure and improve operability.

[0143] In one embodiment, if Fig.21 As shown, the second lever arm connection portion 332 includes a hexagonal column structure coaxially fixedly arranged with the second bolt column 330. The hexagonal column structure is connected to the external force-applying member to apply a torque opposite to the rotation direction of the second nut 340 to the second bolt column 330. For example, a torque opposite to the rotation direction of the second nut 340 is applied to the hexagonal column by a wrench.

[0144] In one embodiment, the second lever arm connection structure is a hexagonal column structure formed by the second bolt column 330 itself (ie, a hexagonal column structure formed by the second bolt column body 331 itself).

[0145] In one embodiment, the second lever arm connection portion 332 further includes any one of through holes, blind holes, grooves, or bosses, or two or more structures, which are arranged on the hexagonal prism. Such an arrangement can increase the types and ranges of external connection tools of the first lever arm connection structure and improve operability.

[0146] In one embodiment, if Fig.21 As shown, the cross-sectional shape of the second through hole 311 is circular, and the second bolt 330 is slidably connected to the second through hole 311 along the axial direction.

[0147] In one embodiment, the cross-sectional shape of the second through hole 311 is an oblong hole or a polygonal hole. The second bolt 330, or the second bolt 330 and the boss, or the second lever connecting portion 332 is axially slidably connected to the second through hole 311. Such a configuration can facilitate the second bolt 330 to be subjected to a torque opposite to the rotation direction of the second nut 430 through the second fixing block 310 itself.

[0148] In one embodiment, if Fig.21 As shown, the limiting structure 350 is a closed circular ring.

[0149] In one embodiment, the limiting structure 350 is a hook-shaped structure.

[0150] In one embodiment, the limiting structure 350 is a lock.

[0151] In one embodiment, the tensile member 500 is a steel bar.

[0152] In one embodiment, the tensile member 500 is a steel wire.

[0153] In one embodiment, if Fig. 9 or Fig.10 As shown, the tensile member 500 is a steel strand.

[0154] In one embodiment, the tensile member 500 is a combination of two or more of steel bars, steel wires or steel strands.

[0155] In one embodiment, if Figure 3 or Fig.10 As shown, the steel section 100 is a square steel.

[0156] In one embodiment, if Fig. 22 or Fig.23 or Fig.24 As shown in or 25, the steel section 100 is an "I" steel section.

[0157] In one embodiment, the steel section 100 is an “H” steel section 100 .

[0158] In one embodiment, the steel section 100 is a “U”-shaped steel section 100 .

[0159] In one embodiment, if Fig.26 or Fig. 27 or Fig.28 As shown in FIG. 29 , the steel section 100 is a “Ⅱ” steel section 100 .

[0160] In one embodiment, if Fig.30 or Fig.31 or Fig.32 As shown in FIG. 33 , the steel section 100 is a “III” steel section 100 .

[0161] In one embodiment, the steel 100 is a combination of two or more of square steel, I-shaped steel, H-shaped steel 100, U-shaped steel 100, II-shaped steel 100 or III-shaped steel 100.

[0162] In one embodiment, if Fig.34 As shown, the steel section 100 is provided with a first turning portion 200 at the first end, a second turning portion 400 at the second end, and a third turning portion 900 at the middle portion in the length direction. A first limiting portion 300 is provided between the first turning portion 200 and the third turning portion 900, and a second limiting portion 800 is provided between the second turning portion 400 and the third turning portion 900. The tensile member 500 passes through and connects the first turning portion 200, the first limiting portion 300, the third turning portion 90, the second limiting portion 800 and the second turning portion 400 in sequence. The first limiting portion 300 and the second limiting portion 800 are provided close to the side of the steel section 100 that bears tensile stress. The middle portion of the steel section 100 is connected to a fixed object (for example, connected to a vertically arranged support beam). There is at least one point on the tensile member 500 between the first turning portion 200 and the third turning portion 900, the distance to the side of the steel section 100 subjected to tensile stress is greater than the distance from the center line of the steel section 100 to the side of the steel section 100 subjected to tensile stress. There is at least one point on the tensile member 500 between the second turning portion 400 and the third turning portion 900, the distance to the side of the steel section 100 subjected to tensile stress is greater than the distance from the center line of the steel section 100 to the side of the steel section 100 subjected to tensile stress. The tensile member 500 is in a tensioned state to generate tensile stress along the length direction of the tensile member 500. The first limiting portion 300 is used to apply the resultant force or component force of the tensile stress generated by the tensile member 500 to the steel section 100 to offset the pressure borne by a portion of the steel section 100 between the first turning portion 200 and the third turning portion 900. The second limiting portion 800 is used to apply the resultant force or component force of the tensile stress generated by the tensile member 500 to the profile steel 100 to offset the pressure on a portion of the profile steel 100 between the second turning portion 400 and the third turning portion 900. This reduces the tensile stress on the side of the profile steel 100 that is subjected to the tensile stress, improves the rigidity of the profile steel 100, and reduces the disturbance of the profile steel 100.

[0163] In one embodiment, if Figure 7 or Figure 8 or Fig. 9As shown, the second end of the steel section 100 is provided with a second tensioning part 700. The second end includes the second end face of the steel section 100 and a portion cut inwardly by a certain distance from the second end face along the length direction of the steel section 100. The second tensioning part 700 includes a third fixing block 710 and a third bolt 720 column assembly. The third fixing block 710 is fixedly connected or detachably connected to the steel section 100. The third fixing block 710 is provided with a third through hole 711. The third bolt 720 column assembly includes a third bolt 720, a third bolt column 730 fixedly connected to one end of the third bolt 720, and a third nut 740 threadedly connected to the third bolt 720. The third bolt column 730 is provided with a third force arm connecting part 732 or a third force arm connecting structure, so as to apply a torque opposite to the rotation direction of the third nut 740 to the externally connected force applying member to the third bolt column 730. The third bolt 720 is gap-connected with the third through hole 711. By applying a torque opposite to the rotation direction of the third nut 740 to the third bolt column 730 and rotating the third nut 740 , the engagement degree between the third nut 740 and the third bolt 720 can be increased, so that the third bolt 720 moves axially along the third through hole 711 to tighten the tensile member 500 .

[0164] In one embodiment, if Figure 7 or Figure 8 As shown, the third arm connection part 732 includes a prism structure coaxially fixed with the third tether 730 (i.e., the third tether body 731 is coaxially connected to the prism). The third arm connection structure is a prism structure formed by the third tether 730 itself (i.e., a prism knot formed by the third tether body 731 itself).

[0165] In one embodiment, if Figure 7 or Figure 8 As shown, the third force arm connection structure is any one of a through hole, a blind hole, a groove, or a boss, or two or more structures arranged on the third bolt column 730.

[0166] In one embodiment, the third lever arm connection portion 732 includes a quadrangular column structure coaxially fixedly arranged with the third bolt column 730 (i.e., a quadrangular column is coaxially connected to the third bolt column body 731 or the end surface), and the quadrangular column structure is connected to the external force-applying member to apply a torque opposite to the rotation direction of the third nut 740 to the third bolt column 730. For example, a torque opposite to the rotation direction of the third nut 740 is applied to the quadrangular column by a wrench.

[0167] In one embodiment, the third lever arm connection structure is a quadrangular prism structure formed by the third tethering column 730 itself (ie, the third tethering column body 731 itself is a quadrangular prism structure).

[0168] In one embodiment, the third lever arm connection portion 732 further includes any one of a through hole, a blind hole, a groove, or a boss, or two or more structures, which are arranged on a quadrangular prism.

[0169] In one embodiment, the third lever arm connection portion 732 includes a hexagonal column structure coaxially fixedly arranged with the third bolt column 730 (i.e., a hexagonal column is coaxially connected to the third bolt column body 731 or the end surface). The hexagonal column structure is connected to the external force-applying member to apply a torque opposite to the rotation direction of the third nut 740 to the third bolt column 730. For example, a torque opposite to the rotation direction of the third nut 740 is applied to the hexagonal column by a wrench.

[0170] In one embodiment, the third lever arm connection structure is a hexagonal prism structure formed by the third tethering column 730 itself (ie, the third tethering column body 731 itself is a hexagonal prism structure).

[0171] In one embodiment, the third lever arm connection portion 732 further includes any one of a through hole, a blind hole, a groove, or a boss, or two or more structures, arranged on the hexagonal prism.

[0172] In one embodiment, the cross-sectional shape of the third through hole 711 is an oblong hole or a polygonal hole.

[0173] The third fastening column 730 , or the third fastening column 730 and the boss, or the third force arm connecting portion 732 is slidably connected to the third through hole 711 along the axial direction.

[0174] In one embodiment, if Figure 7 or Figure 8 As shown, the third bolt column 730 is connected to the tensile member 500 via the second connecting member 750 .

[0175] In one embodiment, if Fig.11 or Fig.13 As shown, the first fixing block 610 is provided with a first fixing block connecting portion 612 for inserting and connecting with the square steel. It is worth noting that, although the drawings of the present invention only show the situation of inserting the first fixing block connecting portion 612 into the square steel for connection, within the scope of the technical concept, the solution of inserting the square steel into the first fixing block connecting portion 612, and any similar technical solution using the concept of the present invention should also be within the protection scope of the present invention.

[0176] In one embodiment, if Fig. 20As shown, the first force arm connection part 632 includes a hexagonal prism structure coaxially fixed with the first bolt column 630 (that is, the first bolt column body 631 is coaxially connected to the hexagonal prism), and a through hole 634 provided on the hexagonal prism. With such a configuration, not only can the hexagonal prism structure be used to connect the force-applying member to the outside to apply a torque opposite to the rotation direction of the first nut to the first bolt column 630. For example, a torque opposite to the rotation direction of the first nut is applied to the hexagonal prism through a wrench. It is also possible to insert a rigid rod into the through hole 634 to apply a torque opposite to the rotation direction of the first nut to the first bolt column 630. This broadens the range of tools that this solution can be applied to during tensioning.

[0177] In one embodiment, if Fig. 20 As shown, the first force arm connecting portion 632 includes a hexagonal column structure coaxially fixedly arranged with the first bolt column 630 (that is, the first bolt column body 631 is coaxially connected to the hexagonal column). The hexagonal column structure is connected to the external force-applying member to apply a torque opposite to the rotation direction of the first nut to the first bolt column 630. For example, a torque opposite to the rotation direction of the first nut is applied to the hexagonal column by a wrench.

[0178] In one embodiment, the first force arm connection structure is a hexagonal column structure formed by the first bolt column 630 itself (ie, a hexagonal column structure formed by the first bolt column body 631 itself).

[0179] In one embodiment, the first lever arm connection portion 632 further includes any one of a through hole, a blind hole, a groove, or a boss, or two or more structures, arranged on the hexagonal prism.

[0180] In one embodiment, the cross-sectional shape of the first through hole 611 is an oblong hole (eg Fig.12 or Fig.13 ), or polygonal holes (as shown Fig.15 or Fig.16 or Fig.17 or Fig.18 The first bolt 630, or the first bolt 630 and the boss, or the first lever connecting portion 632 is axially slidably connected to the first through hole 611. In this way, the first fixing block 610 itself can be used to apply a torque opposite to the rotation direction of the first nut 640 to the first bolt 630.

[0181] In one embodiment, the thickness of the main beam is 25 mm to 45 mm.

[0182] The prestressed steel beam provided above is provided with a first limiting portion 300 in the middle of the length direction of the long strip steel 100, and at least one tensile member 500 connected to the first limiting portion 300 is provided along the length direction of the steel 100. The first limiting portion 300 is provided near the side of the steel 100 that bears tensile stress. There is at least one point on the tensile member 500 whose distance to the side of the steel 100 that bears tensile stress is greater than the distance from the center line of the steel 100 to the side of the steel 100 that bears tensile stress. The tensile member 500 is in a tensioned state to generate tensile stress along the length direction of the tensile member 500. In this way, the first limiting portion 300 can apply the resultant force or component force of the tensile stress generated by the tensile member 500 to the steel 100 to offset a part of the pressure borne by the steel 100. Thereby, the tensile stress on the side of the steel 100 that bears tensile stress is reduced, the rigidity of the steel 100 is improved, and the disturbance of the steel 100 is reduced.

[0183] According to the above content, the present invention also provides an ultra-thin sandwich floor.

[0184] An ultra-thin sandwich floor, such as Fig.35 As shown, it includes a main beam horizontally arranged within the same horizontal height range, a secondary beam horizontally arranged and connected to the main beam at a certain angle, a floor layer group arranged above the main beam and the secondary beam, and a ceiling layer group arranged below the main beam and the secondary beam. It also includes a ceiling mounting block connected to the outer side wall of the main beam and / or the secondary beam. The floor layer group is connected to the upper surface of the main beam and / or the secondary beam. The ceiling layer group is connected to the lower surface of the ceiling mounting block. The main beam is a prestressed steel beam in any of the above embodiments.

[0185] In one embodiment, if Fig.35 As shown, the ceiling mounting block is connected to the outer side wall of only one main beam, that is, the ceiling mounting block has only one surface connected to the outer side wall of the main beam.

[0186] In one embodiment, the ceiling mounting block is connected to the outer side wall of only one secondary beam, that is, only one side of the ceiling mounting block is connected to the secondary side of the main beam.

[0187] In one embodiment, the ceiling mounting block is connected to two adjacent main beams at the same time, that is, both ends of the ceiling mounting block are respectively connected to the outer side walls of the two adjacent main beams.

[0188] In one embodiment, the ceiling mounting block is connected to two adjacent secondary beams at the same time, that is, two ends of the ceiling mounting block are respectively connected to the outer side walls of two adjacent secondary beams.

[0189] In one embodiment, the ceiling mounting block is connected to both the main beam and the secondary beam, that is, one end of the two ends of the ceiling mounting block is connected to the outer wall of the main beam, and the other end is connected to the outer wall of the secondary beam.

[0190] In one embodiment, the secondary beam is a steel beam.

[0191] In one embodiment, the secondary beam is a steel beam provided with prestress, and the prestress is provided in the same manner as the prestress of the main beam.

[0192] In one embodiment, if Fig.35 As shown, the ceiling mounting blocks are prismatic wooden blocks.

[0193] In one embodiment, if Fig.35 As shown, the floor layer group includes a patterned steel plate, a rubber pad and a floor. The foot pad is arranged between the patterned steel plate and the floor. The patterned steel plate is fixedly connected to the upper surface of the main beam. The ceiling layer group includes a top plate fixedly connected to the ceiling mounting block. The lower surface of the top plate is used to set the decorative layer.

[0194] In one embodiment, if Fig.35 As shown, the floor layer group includes a patterned steel plate, a rubber pad and a floor. The foot pad is arranged between the patterned steel plate and the floor. The patterned steel plate is fixedly connected to the upper surface of the secondary beam. The ceiling layer group includes a top plate fixedly connected to the ceiling mounting block. The lower surface of the top plate is used to set the decorative layer.

[0195] In one embodiment, if Fig.35 As shown, the floor layer group includes a patterned steel plate, a rubber pad and a floor. The foot pad is arranged between the patterned steel plate and the floor. The patterned steel plate is fixedly connected to the upper surface of the main beam and the secondary beam at the same time. The ceiling layer group includes a top plate fixedly connected to the ceiling mounting block. The lower surface of the top plate is used to set the decorative layer.

[0196] In one of the embodiments, the thickness of the main beam is 25 mm to 45 mm, that is, the height difference between the upper and lower surfaces of the steel section 100 used as the main beam after being installed as a beam is 25 mm to 45 mm, so as to reduce the thickness of the mezzanine floor itself, reduce consumables and save space, and realize an ultra-thin mezzanine.

[0197] In one of the embodiments, the thickness of the main beam is 25 mm, that is, the height difference between the upper and lower surfaces of the steel section 100 used as the main beam after being installed as a beam is 25 mm, so as to reduce the thickness of the mezzanine floor itself, reduce consumables and save space, and realize an ultra-thin mezzanine.

[0198] In one of the embodiments, the thickness of the main beam is 45 mm, that is, the height difference between the upper and lower surfaces of the steel section 100 used as the main beam after being installed as a beam is 45 mm, so as to reduce the thickness of the mezzanine floor itself, reduce consumables and save space, and realize an ultra-thin mezzanine.

[0199] In one of the embodiments, the thickness of the main beam is 35 mm, that is, the height difference between the upper and lower surfaces of the steel section 100 used as the main beam after being installed as a beam is 35 mm, so as to reduce the thickness of the mezzanine floor itself, reduce consumables and save space, and realize an ultra-thin mezzanine.

[0200] In one of the embodiments, the thickness of the main beam is 30 mm, that is, the height difference between the upper and lower surfaces of the steel section 100 used as the main beam after being installed as a beam is 30 mm, so as to reduce the thickness of the mezzanine floor itself, reduce consumables and save space, and realize an ultra-thin mezzanine.

[0201] The ultra-thin sandwich floor provided above can effectively improve the rigidity of the main beam and reduce the disturbance of the main beam of the steel 100 by setting prestress on the main beam of the steel 100. Therefore, the thickness of the main beam of the steel 100 can be greatly reduced while ensuring the rigidity of the main beam of the steel 100. Furthermore, the thickness of the building sandwich constructed by using such prestressed steel beams can be greatly reduced, thereby releasing the building space and maximizing the use of the limited building space.

[0202] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0203] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A prestressed steel beam, characterized in that: It comprises a long strip steel, a first limiter arranged in the middle of the steel in the length direction, and at least one tensile member connected to the first limiter arranged along the length direction of the steel; The first limiting portion is arranged close to the side of the steel section that bears the tensile stress; There is at least one point on the tensile member, the distance from the side of the steel section that is subjected to tensile stress is greater than the distance from the center line of the steel section to the side of the steel section that is subjected to tensile stress; The tensile member is in a tensioned state to generate tensile stress along the length direction of the tensile member; The first limiting portion is used to apply the resultant force or component force of the tensile stress generated by the tensile member to the section steel to offset a part of the pressure borne by the section steel; The first end of the steel section is provided with a first tensioning portion; The first tensioning portion includes a first fixing block and a first bolt column assembly; The first fixing block is fixedly connected or detachably connected to the profile steel; The first fixing block is provided with a first through hole; The first bolt column assembly includes a first bolt, a first bolt column fixedly connected to one end of the first bolt, and a first nut threadedly connected to the first bolt; The first bolt is provided with a first force arm connection portion or a first force arm connection structure, so as to connect the force applying member to the outside and apply a torque opposite to the rotation direction of the first nut to the first bolt; The first bolt is gap-connected with the first through hole; By applying a torque opposite to the rotation direction of the first nut to the first bolt column and rotating the first nut, the engagement degree between the first nut and the first bolt can be increased, so that the first bolt moves axially along the first through hole to tighten the tensile member.

2. The prestressed steel beam according to claim 1, characterized in that: The first end of the steel section is provided with a first turning portion; The second end of the steel section is provided with a second turning portion; The first turning portion is connected to the steel section and the tensile member respectively; The second turning portion is connected to the steel section and the tensile member respectively; The first turning portion and the second turning portion are both used to change the arrangement direction of the tensile member on the steel section, so as to change the direction of the tensile stress on the tensile member after the tensile member is tensioned.

3. The prestressed steel beam according to claim 1, characterized in that: It also includes a second limiting portion arranged in the middle of the length direction of the steel section; The second limiting portion is arranged close to the side of the section steel that bears the tensile stress; The tensile part includes at least one tensile member connected to the second limiting part, and there is at least one point on the tensile member whose distance to the side of the steel section that bears tensile stress is greater than the distance from the center line of the steel section to the side of the steel section that bears tensile stress. The tensile member is in a tensioned state to generate tensile stress along the length direction of the tensile member. The second limiting part is used to apply the resultant force or component force of the tensile stress generated by the tensile member to the steel section to offset part of the pressure borne by the steel section.

4. The prestressed steel beam according to claim 1, characterized in that: The first end of the steel section is provided with a first fixing portion; The second end of the steel section is provided with a second fixing portion; The first fixing portion and the second fixing portion are both provided with a locking mechanism to lock the tensile member in a tensioned state, thereby maintaining the tensile member in a tensioned state.

5. The prestressed steel beam according to claim 1, characterized in that: The first lever arm connection portion comprises a prism structure coaxially fixedly arranged with the first bolt; The first force arm connection structure is a prism structure formed by the first bolt itself, or is any one of a through hole, a blind hole, a groove, and a boss provided on the first bolt, or two or more structures; The cross-sectional shape of the first through hole is an oblong hole or a polygonal hole; The first bolt, or the first bolt and the boss, or the first force arm connecting portion is axially slidably connected to the first through hole.

6. The prestressed steel beam according to claim 1, characterized in that: The first limiting portion includes a second fixing block and a second bolt column assembly; The second fixing block is fixedly connected or detachably connected to the steel section; The second fixing block is provided with a second through hole or a U-shaped slot hole; The cross-sectional shape of the second through hole or the U-shaped slot is an oblong hole or a polygonal hole; The second bolt column assembly includes a second bolt, a second bolt column fixedly connected to one end of the second bolt, a limiting structure fixedly connected to the other end of the second bolt, and a second nut threadedly connected to the second bolt; The tensile member is connected to the limiting structure, so that the limiting structure limits the tensile member, thereby causing the limiting structure to apply tensile stress to the tensile member; The second bolt is provided with a second force arm connection portion or a second force arm connection structure, so as to connect the force applying member to the outside and apply a torque opposite to the rotation direction of the second nut to the second bolt; The second bolt is gap-connected with the second through hole; By applying a torque to the second bolt column in a direction opposite to the rotation direction of the second nut and rotating the second nut, the degree of engagement between the second nut and the second bolt can be increased, thereby causing the second bolt to move axially along the second through hole to apply a tensioning force from the middle of the tensile member to tension the tensile member.

7. The prestressed steel beam according to claim 6, characterized in that: The second lever arm connection portion comprises a prism structure coaxially fixedly arranged with the second bolt; The second force arm connection structure is a prism structure formed by the second bolt itself, or is any one of a through hole, a blind hole, a groove, or a boss provided on the second bolt, or two or more structures; The cross-sectional shape of the second through hole is an oblong hole or a polygonal hole; The second bolt, or the second bolt and the boss, or the second force arm connecting portion is axially slidably connected with the second through hole.

8. An ultra-thin sandwich floor, characterized in that: The invention comprises a main beam arranged horizontally within the same horizontal height range, a secondary beam arranged horizontally and connected to the main beam at a certain angle, a floor layer group arranged above the main beam and the secondary beam, and a ceiling layer group arranged below the main beam and the secondary beam; Also included is a ceiling mounting block connected to the outer side wall of the primary beam and / or the secondary beam; The floor layer group is connected to the upper surface of the main beam and / or the secondary beam; The ceiling layer group is connected to the lower surface of the ceiling mounting block; The floor layer group includes a patterned steel plate, a rubber pad and a floor; The rubber pad is arranged between the patterned steel plate and the floor; The patterned steel plate is fixedly connected to the upper surface of the main beam and / or the secondary beam; The ceiling layer group includes a top plate fixedly connected to the ceiling mounting block; The lower surface of the top plate is used to set a decorative layer; The main beam is a prestressed steel beam as described in any one of claims 1-7.

9. The ultra-thin sandwich floor according to claim 8, characterized in that: The thickness of the main beam is 25 mm to 45 mm.

Images