CN209855046U - Postposition prestress adjusting device and prestress beam - Google Patents
Postposition prestress adjusting device and prestress beam Download PDFInfo
- Publication number
- CN209855046U CN209855046U CN201920645376.6U CN201920645376U CN209855046U CN 209855046 U CN209855046 U CN 209855046U CN 201920645376 U CN201920645376 U CN 201920645376U CN 209855046 U CN209855046 U CN 209855046U
- Authority
- CN
- China
- Prior art keywords
- prestress
- bolt column
- shaped steel
- post
- adjusting device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Rod-Shaped Construction Members (AREA)
Abstract
The utility model provides a rear prestress adjusting device, which comprises U-shaped steel and a prestress adjusting part arranged on the outer side of the side wall of the U-shaped steel; the prestress adjusting part comprises a supporting plate and a bolt column assembly; the supporting plate is horizontally arranged and fixedly connected with the U-shaped steel; a first through hole is vertically formed in the supporting plate; the bolt column assembly comprises a bolt column, a limiting part arranged at the first end part of the bolt column and a nut in threaded connection with the bolt column; the bolt column is in clearance connection with the first through hole; the limiting part and the nut are positioned at two sides of the support plate or at the same side of the support plate; the limiting part is used for connecting a tensile piece applying prestress; the prestress adjusting part adjusts the distance between the limiting part and the supporting plate by adjusting the meshing amount of the screw threads arranged on the nut and the bolt column, so that the prestress is adjusted. The device can be to the rearmounted prestressing force of roof beam body to can adjust the size and the position of prestressing force in a flexible way. Furthermore, the utility model also provides a prestressed girder.
Description
Technical Field
The utility model relates to a building technical field especially relates to a rearmounted prestressing force adjusting device and prestressed beam.
Background
Declaring that: any discussion of the background art throughout the specification should in no way be considered as an admission that such art is widely known or forms part of common general knowledge in the field.
In the old project of building modification, the condition that the beam body of the early building is bent or damaged due to pressure bearing is often encountered, the bent beam body can not well keep the shape of the building, the structural stress of the building is increased due to the bending of the beam body, and the hidden danger of damage of the building after the old project of modification is increased. In view of the above situation, it is a common practice to fix the beam by using a steel clamping plate, but this method can reinforce the strength of the beam, but cannot improve the bending of the beam, and the potential safety hazard caused by stress still exists.
On the other hand, the traditional prestressed beams are all manufactured in a prefabricated mode, namely, the prestressed force application part in the prestressed beam is fixedly connected with the beam, namely, the size and the position of the prestress are set when the prestressed beam leaves a factory, and the prestressed force application part cannot be adjusted according to the actual bearing condition of the beam in a construction site. In some light building environments, when the beam is subjected to rigidity fatigue due to long-term use, the beam is prone to bending to a certain extent, which presents a great safety hazard for light buildings, and the traditional beam cannot be adjusted in the buildings.
SUMMERY OF THE UTILITY MODEL
Based on the above, the rear prestress adjusting device for adjusting the prestress size and the prestress applying position of the beam conveniently is provided.
In addition, the prestressed beam capable of conveniently adjusting the prestress size and the prestress application position of the beam is further provided.
A rear prestress adjusting device comprises U-shaped steel and a prestress adjusting part arranged on the outer side of the side wall of the U-shaped steel; the prestress adjusting part comprises a support plate and a bolt column assembly; the supporting plate is horizontally arranged and is fixedly connected with the U-shaped steel; a first through hole is vertically formed in the supporting plate; the bolt column assembly comprises a bolt column, a limiting part arranged at the first end part of the bolt column and a nut in threaded connection with the bolt column; the bolt column is in clearance connection with the first through hole; the limiting part and the nut are positioned on two sides of the supporting plate or on the same side of the supporting plate; the limiting part is used for connecting a tensile piece for applying prestress; the prestress adjusting part adjusts the distance between the limiting part and the supporting plate by adjusting the meshing amount of the nut and the threads arranged on the bolt column, so that the prestress is adjusted.
In one embodiment, the device further comprises a first rib; the first rib plate is fixedly connected with the U-shaped steel and the first side face of the supporting plate to bear compressive stress and reduce torque of a connecting part of the supporting plate and the U-shaped steel.
In one embodiment, the device further comprises a second rib; the second rib plate is fixedly connected with the U-shaped steel and the second side face of the supporting plate so as to bear tensile stress and reduce torque of the connecting part of the supporting plate and the U-shaped steel.
In one embodiment, a first limiting block is arranged on the inner side of a first side wall of the U-shaped steel; a second limiting block is arranged on the inner side of the second side wall of the U-shaped steel; the distance between the first limiting block and the second limiting block is greater than or equal to 5 millimeters; the distance between the first limiting block and the bottom of the U-shaped steel is equal to the distance between the second limiting block and the bottom of the U-shaped steel. The rear prestress adjusting device is mainly used for pre-installing I-shaped steel beams, II-shaped steel beams and III-shaped steel beams and can adjust the later prestress of the steel beams.
In one embodiment, the first stopper and the second stopper are the same in size and are symmetrically arranged.
In one embodiment, the bolt column is arranged between the limiting part and the threaded section arranged on the bolt column, and a force arm connecting part is further arranged to externally connect a force application part to apply torque opposite to the rotation direction of the nut to the bolt column; the bolt column can be moved along the axial direction of the first through hole by applying a torque to the bolt column opposite to the rotation direction of the nut and rotating the nut so that the engagement degree of the nut with the thread provided on the bolt column is increased, thereby adjusting the distance between the limiting portion and the support plate.
In one embodiment, the cross section of the first through hole is in the shape of an oblong hole or a polygonal hole; the force arm connecting part is connected with the first through hole in an axial sliding mode.
In one embodiment, the moment arm connecting portion includes a prism structure coaxially and fixedly disposed with the bolt column, or a prism structure formed by the bolt column itself, or any one of a second through hole, a blind hole, a groove, or a boss disposed on the bolt column, or a combination of two or more.
In one embodiment, a threaded hole is further formed in the side wall of the U-shaped steel at a position close to the bottom of the U-shaped steel; the threaded hole is used for being connected with a bolt, and the screwed bolt is used for abutting against the prestress stressed piece to achieve the effect of fixing the position of the U-shaped steel.
In one embodiment, the threaded holes comprise a first threaded hole arranged on a first side wall of the U-shaped steel and a second threaded hole arranged on a second side wall of the U-shaped steel.
In one embodiment, the bolt and post assembly further comprises a washer;
the gasket is arranged between the arm connecting part and the nut or between the nut and the second end part of the bolt column; the gasket is in clearance connection with the bolt column.
In one embodiment, the surface of the gasket is coated with a lubricant.
In one embodiment, the second end of the bolt stud is provided with a guide stud; the guide column is connected with the inner wall of the first through hole in a sliding mode to play a role in guiding the bolt column when the bolt column moves axially along the first through hole.
In one embodiment, the tensile member is a rebar.
In one embodiment, the tensile member is a steel wire.
In one embodiment, the tensile member is a steel strand.
In one embodiment, the tensile member is a combination of two or more of steel bars, steel wires, or steel strands.
In one embodiment, the support plate is integrally formed with the U-shaped steel.
In one embodiment, the first limiting block and the second limiting block are integrally formed with the U-shaped steel.
In one embodiment, the limiting part is a closed circular ring.
In one embodiment, the limiting portion is a hook-shaped structure.
In one embodiment, the limiting part is a lock catch.
According to the rear prestress adjusting device, the prestress adjusting parts are arranged on the outer sides of the two side walls of the U-shaped steel, so that the rear prestress force application component (tensile piece) can be adjusted in tension through the prestress adjusting parts after the rear prestress adjusting part is connected with the beam body, and the prestress on the beam is adjusted. In addition, the application position of prestress can be adjusted by adjusting the difference of the connection part of the U-shaped steel and the beam body.
According to the above, the present application also provides a prestressed girder to which the above-mentioned post-prestressing force adjusting device is applied.
A prestressed beam comprises a long-strip-shaped beam body, a first fixing part arranged at the first end part of the beam body, a second fixing part arranged at the second end part of the beam body, and a first rear prestress adjusting device arranged in the middle of the beam body in the length direction; the first fixing part and the second fixing part are arranged close to one side of the beam body bearing compressive stress; a tensile piece is connected between the first fixing part and the second fixing part; the first rear prestress adjusting device is the rear prestress adjusting device in any one of the above embodiments; the first rear prestress adjusting device is arranged on one side of the beam body, which bears tensile stress; the limiting part in the first rear prestress adjusting device is connected with the tensile piece so as to adjust the tensile force on the tensile piece and further adjust the prestress on the prestressed beam.
In one embodiment, the steering device further comprises a first steering part arranged at the first end part of the beam body, and a second steering part arranged at the second end part of the beam body; the first steering portion and the second steering portion are disposed between the first fixing portion and the second fixing portion; the first steering portion is connected with the beam body and the tensile member; the second steering part is connected with the beam body and the tensile piece; the first steering portion and the second steering portion are used for changing the arrangement direction of the tensile member on the beam body so as to change the direction of tensile stress on the tensile member after the tensile member is tensioned.
In one embodiment, the device further comprises a second rear prestress adjusting device and a third rear prestress adjusting device; the second rear prestress adjusting device and the third rear prestress adjusting device are both rear prestress adjusting devices described in any one of the above embodiments; the second rear prestress adjusting device is arranged between the first fixing part and the first rear prestress adjusting device and is arranged on one side of the beam body bearing the compressive stress; the third rear prestress adjusting device is arranged between the second fixed part and the first rear prestress adjusting device and is arranged on one side of the beam body bearing the compressive stress; the limiting parts in the second rear prestress adjusting device and the third rear prestress adjusting device are connected with the tensile piece to adjust the tensile force on the tensile piece, so that the size and the direction of the prestress on the prestressed beam are adjusted.
In one embodiment, the beam body is square steel.
In one embodiment, the beam body is an I-shaped steel.
In one embodiment, the beam body is H-shaped steel.
In one embodiment, the beam body is made of U-shaped steel.
In one embodiment, the beam body is a II-shaped steel.
In one embodiment, the beam body is a III-section steel.
In one embodiment, the beam body 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.
The prestressed beam provided by the above is characterized in that the two ends of the long-strip-shaped beam body are provided with the fixing parts for fixing the tensile piece, the rear prestress adjusting device is arranged in the middle of the long-strip-shaped beam body and on one side of the beam body bearing the tensile stress, and the limiting part in the rear prestress adjusting device is connected with the tensile piece applying the prestress, so that the size of the tensile stress on the tensile piece is adjusted, and further the size of the prestress on the prestressed beam is adjusted. In addition, the position of the rear prestress adjusting device on the long-strip-shaped beam body is not invariable, so that the connecting position of the rear prestress adjusting device and the beam body can be flexibly adjusted according to actual needs, the applying position of prestress on the beam body can be flexibly adjusted, and the application range and the application occasion of the prestressed beam are improved.
In the foregoing, it is an object of the present invention, at least in some embodiments, to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative. The set of summarized embodiments is provided to foreshadow potential patent claims based on a selection of technical features disclosed in the following detailed description, and these set of summarized embodiments are not intended to limit the scope of claims that may be expanded in any way.
Drawings
Fig. 1 is a schematic perspective view of a post-prestressed adjusting device according to an embodiment;
FIG. 2 is a schematic top view of an exemplary embodiment of a post-pre-stress adjustment apparatus;
FIG. 3 is a schematic diagram illustrating a right side cross-sectional view of a post-pre-stress adjustment apparatus according to an embodiment;
FIG. 4 is a schematic diagram illustrating a right side cross-sectional view of a post-pre-stress adjustment apparatus according to an embodiment;
FIG. 5 is a schematic perspective view of a rear pre-stress adjustment device provided with a limiting block according to an embodiment;
fig. 6 is a schematic top view of the rear prestress adjusting device provided with the limiting block according to an embodiment;
FIG. 7 is a schematic diagram of a right-view cross-sectional structure of the rear pre-stress adjustment device provided with a limiting block according to an embodiment;
FIG. 8 is a schematic diagram of a right-view cross-sectional structure of the rear pre-stress adjustment device provided with a limiting block according to an embodiment;
FIG. 9 is a schematic perspective view of a post-pre-stress adjustment apparatus according to an embodiment;
FIG. 10 is a schematic structural diagram of a bolt and post assembly according to an exemplary embodiment;
FIG. 11 is a schematic structural diagram of a bolt and post assembly according to an exemplary embodiment;
FIG. 12 is a schematic structural diagram of a bolt and post assembly according to an exemplary embodiment;
FIG. 13 is a schematic perspective view of a beam with a post-prestressing adjustment device according to an exemplary embodiment;
FIG. 14 is a schematic diagram of a right side view of a beam with a post-prestressing adjustment device according to an embodiment;
FIG. 15 is a schematic perspective view of a beam with a post-prestressing adjustment device according to an exemplary embodiment;
FIG. 16 is a schematic diagram of a right side view of a beam with a post-prestressing adjustment device according to an embodiment;
FIG. 17 is a schematic perspective view of a beam with three post-prestressing adjustment devices according to an exemplary embodiment;
FIG. 18 is a schematic perspective view of an I-shaped steel beam with a post-prestressing adjustment mechanism according to an exemplary embodiment;
fig. 19 is a right side view of the i-shaped steel beam body provided with a rear prestress adjusting device according to an embodiment.
Description of reference numerals: 100. U-shaped steel; 110. a support plate; 111. a first rib plate; 112. a second rib plate; 113. a first through hole; 121. a first threaded hole; 122. a second threaded hole; 131. a first stopper; 132. a second limiting block; 200. bolt stud 211 assembly 200; 210. a bolt column; 211. a limiting part; 212. a moment arm connecting part; 213. a second through hole; 214. a guide post; 220. a nut; 230. a gasket; 300. a beam body; 311. a first fixed part; 312. a second fixed part; 321. a first steering section; 322. a second steering section; 400. a tensile member; 510. a first bolt assembly; 520. a second bolt assembly; 1. a first post-prestressing adjustment device; 2. a second rear prestress adjusting device; 3. and the third rear prestress adjusting device.
Detailed Description
DETAILED DESCRIPTION FIGS. 1-19, discussed below, and the various embodiments used to describe the principles or methods of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. It will be appreciated by those skilled in the art that the principles or methods of the present disclosure may be implemented in any suitably arranged pre-stressed apparatus or pre-stressed beams. Preferred embodiments of the present disclosure will be described hereinafter with reference to the accompanying drawings. In the following description, a detailed description of well-known functions or configurations is omitted so as not to obscure the subject matter of the present disclosure with unnecessary detail. Also, the terms used herein will be defined according to the functions of the present invention. Thus, the terms may differ according to the intention or usage of the resident or the operator. Therefore, the terms used herein must be understood based on the description made herein.
A post-prestress adjusting device, as shown in FIG. 1 or FIG. 9, includes a U-shaped steel 100 and a prestress adjusting portion provided outside a side wall of the U-shaped steel 100. The prestress adjustment part includes a support plate 110 and a bolt cylinder assembly 200. The support plate 110 is horizontally disposed and fixedly connected to the U-shaped steel 100. The support plate 110 is vertically provided with a first through hole 113. The bolt post assembly 200 includes a bolt post 211, a stopper portion 211 provided at a first end of the bolt post 211, and a nut 220 threadedly coupled to the bolt post 211. The bolt shank 211 is gap-coupled to the first through hole 113. The position-limiting portion 211 and the nut 220 are located on two sides of the supporting plate 110 (as shown in fig. 1) or on the same side of the supporting plate 110 (as shown in fig. 9). The stopper 211 is used to connect the tension member 400 to which a prestress is applied. The prestress adjusting portion adjusts the distance between the limiting portion 211 and the support plate 110 by adjusting the amount of the threaded engagement between the nut 220 and the bolt column 211, so as to adjust the magnitude of prestress.
In one embodiment, as shown in FIG. 1, a first rib 111 is also included. The first rib 111 is fixedly connected to the first sides of the U-shaped steel 100 and the support plate 110 to bear compressive stress and reduce torque at the connection portion of the support plate 110 and the U-shaped steel 100.
In one embodiment, as shown in fig. 2, the first ribs 111 are distributed at both ends of the support plate 110.
In one embodiment, as shown in FIGS. 1 and 2, the support plates 110 are disposed perpendicular to the wall plates on both sides of the U-shaped steel.
In one embodiment, as shown in FIG. 1, a second rib 112 is also included. The second rib 112 is fixedly connected to the second sides of the U-shaped steel 100 and the support plate 110 to bear a tensile stress, and reduce a torque at a connection portion of the support plate 110 and the U-shaped steel 100.
In one embodiment, as shown in FIG. 3, the support plate 110 is connected to the U-shaped steel 100 by welding, i.e., the support plate 110 and the U-shaped steel 100 are two separate parts and then connected by welding.
In one embodiment, as shown in FIG. 4, the support plate 110 is integrally formed with the U-shaped steel 100.
In one embodiment, as shown in fig. 5, a first stopper 131 is disposed on the inner side of the first side wall of the U-shaped steel 100. The inner side of the second side wall of the U-shaped steel 100 is provided with a second stopper 132. The distance between the first stopper 131 and the second stopper 132 is greater than or equal to 5 mm. The distance between the first stopper 131 and the bottom of the U-shaped steel 100 is equal to the distance between the second stopper 132 and the bottom of the U-shaped steel 100. The rear prestress adjusting device is mainly used for pre-installing I-shaped steel beams, II-shaped steel beams and III-shaped steel beams and can adjust the later prestress of the steel beams.
In one embodiment, as shown in fig. 6, 7 or 8, the first stopper 131 and the second stopper 132 have the same size and are symmetrically disposed.
In one embodiment, as shown in fig. 7, the first stopper 131 and the second stopper 132 are connected to the U-shaped steel 100 by welding, that is, the first stopper 131 and the second stopper 132 are two separate parts from the U-shaped steel 100 and then connected by welding.
In one embodiment, as shown in FIG. 8, the first stopper 131 and the second stopper 132 are integrally formed with the U-shaped steel 100.
In one embodiment, as shown in fig. 10, 11 or 12, the bolt pillar 211 is further provided with a moment arm connection portion 212 between the limiting portion 211 and the threaded portion provided on the bolt pillar 211, so as to apply a torque opposite to the rotation direction of the nut 220 to the bolt pillar 211 by externally connecting a force application member. By applying a torque to the bolt post 211 opposite to the rotation direction of the nut 220 and rotating the nut 220, the degree of engagement of the nut 220 with the threads provided on the bolt post 211 can be increased, so that the bolt post 211 is moved in the axial direction of the first through hole 113 to adjust the distance between the stopper portion 211 and the support plate 110.
In one embodiment, the first through hole 113 has an oblong hole or a polygonal hole in cross-sectional shape. The arm connecting portion 212 is axially slidably connected to the first through hole 113.
In one embodiment, as shown in fig. 10, 11 or 12, the moment arm connecting portion 212 includes a prismatic structure fixedly disposed coaxially with the bolt post.
In one embodiment, the moment arm connection 212 comprises a prismatic structure formed by the bolt post itself.
In one embodiment, as shown in fig. 10, 11 or 12, the moment arm connection 212 includes a second through hole 213 disposed on the bolt post.
In one embodiment, the moment arm connection 212 includes a blind hole disposed on the bolt post.
In one embodiment, the moment arm connection 212 includes a groove disposed on the bolt post.
In one embodiment, the moment arm connection 212 includes a boss disposed on the bolt post.
In one embodiment, the moment arm connecting portion 212 includes a prism structure coaxially fixed with the bolt, a prism structure formed by the bolt itself, and a combination structure of two or more of the second through hole 213, the blind hole, or the groove and the boss disposed on the bolt.
In one embodiment, as shown in fig. 1, 5 or 9, a threaded hole is further formed in the side wall of the U-shaped steel 100 near the bottom of the U-shaped steel 100. The threaded hole is used for being connected with a bolt, and the screwed bolt is used for abutting against the prestress stressed part to achieve the effect of fixing the position of the U-shaped steel 100.
In one embodiment, as shown in FIG. 1, or FIG. 5, or FIG. 9, the threaded holes include a first threaded hole 121 provided on a first side wall of the U-shaped steel 100 and a second threaded hole 122 provided on a second side wall of the U-shaped steel 100.
In one embodiment, as shown in FIG. 1, FIG. 5 or FIG. 9, two first threaded holes 121 are provided in a first side wall of the U-shaped steel 100 and are respectively provided at both end portions (the axial direction in which the U-shaped steel 100 extends) of the first side wall of the U-shaped steel 100.
In one embodiment, two second threaded holes 122 are provided in the second side wall of the U-shaped steel 100, and are respectively provided at both end portions (the axial direction in which the U-shaped steel 100 extends) of the second side wall of the U-shaped steel 100.
In one embodiment, as shown in fig. 10, 11 or 12, the bolt stud assembly 200 further includes a washer 230.
In one embodiment, as shown in fig. 10, a washer 230 is disposed between the moment arm connection 212 and the nut 220. The washer 230 is in clearance connection with the bolt stub 211.
In one embodiment, as shown in fig. 11 or 12, a washer 230 is disposed between the nut 220 and the second end of the bolt stub 211. The washer 230 is in clearance connection with the bolt stub 211.
In one embodiment, the surface of the gasket 230 is coated with a lubricant. Thereby reducing the friction when the nut 220 is rotated.
In one embodiment, as shown in fig. 12, the second end of the bolt stub 211 is provided with a guide stub 214. The guide post 214 is slidably coupled to an inner wall of the first through hole 113 to guide the bolt post 211 when moving axially along the first through hole 113.
In one embodiment, tensile member 400 is a rebar.
In one embodiment, tensile member 400 is a steel wire.
In one embodiment, tensile member 400 is a steel strand.
In one embodiment, the tensile member 400 is a combination of two or more of steel bars, steel wires, or steel strands.
In one embodiment, as shown in fig. 1, 5, 9, 10, 11, or 12, the stopper 211 is a closed ring.
In one embodiment, the position-limiting portion 211 is a hook-shaped structure.
In one embodiment, the position-limiting portion 211 is a lock.
In the above-mentioned post-prestress adjusting device, the prestress adjusting parts are disposed at the outer sides of the two side walls of the U-shaped steel 100, so that the post-prestress force applying member (tension member 400) can be adjusted in tension by the prestress adjusting parts after being connected to the beam 300, and further the magnitude of the prestress on the beam can be adjusted. In addition, the position of applying prestress can be adjusted by adjusting the difference between the connection portions of the U-shaped steel 100 and the beam body 300.
According to the above, the present application also provides a prestressed girder to which the above-mentioned post-prestressing force adjusting device is applied.
A prestressed girder, as shown in FIG. 13 or FIG. 15, includes an elongated girder 300, a first fixing portion 311 disposed at a first end of the girder 300, a second fixing portion 312 disposed at a second end of the girder 300, and a first post-prestress adjusting device 1 disposed at a middle portion of the girder 300 in a length direction. The first fixing portion 311 and the second fixing portion 312 are disposed near a side of the beam 300 that receives the compressive stress. The tensile member 400 is connected between the first fixing portion 311 and the second fixing portion 312. The first post-prestressing adjustment device 1 is a post-prestressing adjustment device according to any of the embodiments described above. The first rear prestress adjusting device 1 is disposed on a side of the beam body 300 subjected to tensile stress. The limiting portion 211 of the first post-prestressed adjusting device 1 is connected to the tensile member 400 to adjust the tensile force on the tensile member 400, so as to adjust the magnitude of the prestress on the prestressed beam.
In one embodiment, as shown in fig. 13 or fig. 15, the beam further includes a first steering portion 321 disposed at the first end of the beam 300, and a second steering portion 322 disposed at the second end of the beam 300. The first turning portion 321 and the second turning portion 322 are disposed between the first fixing portion 311 and the second fixing portion 312. The first turning portion 321 is connected with the beam body 300 and the tensile member 400. The second steering portion 322 is connected to the beam body 300 and the tensile member 400. The first turning portion 321 and the second turning portion 322 are used to change the arrangement direction of the tensile member 400 on the beam body 300, so as to change the direction of the tensile stress on the tensile member 400 after the tensile member 400 is tensioned.
In one embodiment, as shown in fig. 14 or 16, a first bolt assembly 510 is installed at the first screw hole 121 provided on the first rear prestress adjusting device 1. A second bolt assembly 520 is mounted at the second threaded hole 122. The U-shaped steel 100 is fixed at a specific position of the beam body by applying pressure to the U-shaped steel through the first and second bolt assemblies 510 and 520.
In one embodiment, as shown in fig. 17, a second post-prestressing adjusting device 2 and a third post-prestressing adjusting device 3 are further included. The second post-prestressing adjustment means 2 and the third post-prestressing adjustment means 3 are both post-prestressing adjustment means according to any of the embodiments described above. The second rear prestress adjusting device 2 is disposed between the first fixing portion 311 and the first rear prestress adjusting device 1, and is disposed on a side of the beam 300 that receives compressive stress. The third post-prestress adjusting device 3 is disposed between the second fixing portion and the first post-prestress adjusting device 1, and is disposed on a side of the beam 300 that bears the compressive stress. The limiting parts 211 in the second post-prestress adjusting device 2 and the third post-prestress adjusting device 3 are connected with the tensile member 400 to adjust the tensile force on the tensile member 400, so as to adjust the magnitude and direction of the prestress on the prestressed beam.
In one embodiment, as shown in fig. 13-17, the beam body 300 is square steel.
In one embodiment, as shown in fig. 18 and 19, the beam 300 is an i-shaped steel.
In one embodiment, the beam 300 is an "H" section steel.
In one embodiment, the beam 300 is a "U" section steel.
In one embodiment, the beam 300 is a "II" section steel.
In one embodiment, the beam 300 is a "III" section steel.
In one embodiment, the beam 300 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.
In the prestressed beam provided above, the fixing portions for fixing the tensile member 400 are disposed at the two ends of the elongated beam body 300, the post-prestressed adjusting device is disposed at the middle portion of the elongated beam body 300 and at one side of the beam body 300 bearing the tensile stress, and the post-prestressed adjusting device is connected to the tensile member 400 applying the prestressed force through the limiting portion 211, so as to adjust the magnitude of the tensile stress on the tensile member 400, and further adjust the magnitude of the prestressed force on the prestressed beam. In addition, because the position of the post-prestressed adjusting device on the elongated beam 300 is not constant, the position of the post-prestressed adjusting device connected with the beam 300 can be flexibly adjusted according to actual needs, that is, the position of prestress applied on the beam 300 can be flexibly adjusted, and the application range and application occasion of the prestressed beam are improved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The rear prestress adjusting device is characterized by comprising U-shaped steel and a prestress adjusting part arranged on the outer side of the side wall of the U-shaped steel;
the prestress adjusting part comprises a support plate and a bolt column assembly;
the supporting plate is horizontally arranged and is fixedly connected with the U-shaped steel;
a first through hole is vertically formed in the supporting plate;
the bolt column assembly comprises a bolt column, a limiting part arranged at the first end part of the bolt column and a nut in threaded connection with the bolt column;
the bolt column is in clearance connection with the first through hole;
the limiting part and the nut are positioned on two sides of the supporting plate or on the same side of the supporting plate;
the limiting part is used for connecting a tensile piece for applying prestress;
the prestress adjusting part adjusts the distance between the limiting part and the supporting plate by adjusting the meshing amount of the nut and the threads arranged on the bolt column, so that the prestress is adjusted.
2. The post-prestressing adjustment device according to claim 1,
a first limiting block is arranged on the inner side of the first side wall of the U-shaped steel;
a second limiting block is arranged on the inner side of the second side wall of the U-shaped steel;
the distance between the first limiting block and the second limiting block is greater than or equal to 5 millimeters;
the distance between the first limiting block and the bottom of the U-shaped steel is equal to the distance between the second limiting block and the bottom of the U-shaped steel.
3. The post-prestressing adjustment device according to claim 1,
the bolt column is arranged between the limiting part and the thread section arranged on the bolt column, and is also provided with a force arm connecting part so as to externally connect a force application part to apply torque opposite to the rotation direction of the nut to the bolt column;
the bolt column can be moved along the axial direction of the first through hole by applying a torque to the bolt column opposite to the rotation direction of the nut and rotating the nut so that the engagement degree of the nut with the thread provided on the bolt column is increased, thereby adjusting the distance between the limiting portion and the support plate.
4. The post-prestressing adjustment device according to claim 3,
the cross section of the first through hole is in the shape of an oblong hole or a polygonal hole;
the force arm connecting part is connected with the first through hole in an axial sliding mode.
5. The post-prestressing adjustment device according to claim 3,
the moment arm connecting part comprises a prism structure coaxially and fixedly arranged with the bolt column, or a prism structure formed by the bolt column, or any one of a second through hole, a blind hole, a groove and a boss arranged on the bolt column, or a combined structure of two or more.
6. The post-prestressing adjustment device according to claim 1,
a threaded hole is formed in the position, close to the bottom of the U-shaped steel, on the side wall of the U-shaped steel;
the threaded hole is used for being connected with a bolt, and the screwed bolt is used for abutting against the prestress stressed piece to achieve the effect of fixing the position of the U-shaped steel.
7. The post-prestressing adjustment device according to claim 1,
a guide column is arranged at the second end part of the bolt column;
the guide column is connected with the inner wall of the first through hole in a sliding mode to play a role in guiding the bolt column when the bolt column moves axially along the first through hole.
8. A prestressed beam is characterized by comprising a long-strip-shaped beam body, a first fixing part arranged at the first end part of the beam body, a second fixing part arranged at the second end part of the beam body and a first rear prestressed adjusting device arranged in the middle of the beam body in the length direction;
the first fixing part and the second fixing part are arranged close to one side of the beam body bearing compressive stress;
a tensile piece is connected between the first fixing part and the second fixing part;
the first post-prestressing adjustment device is a post-prestressing adjustment device according to any one of claims 1 to 7;
the first rear prestress adjusting device is arranged on one side of the beam body, which bears tensile stress;
the limiting part in the first rear prestress adjusting device is connected with the tensile piece so as to adjust the tensile force on the tensile piece and further adjust the prestress on the prestressed beam.
9. The prestressed girder of claim 8, further comprising a first turn portion provided at a first end of said girder, a second turn portion provided at a second end of said girder;
the first steering portion and the second steering portion are disposed between the first fixing portion and the second fixing portion;
the first steering portion is connected with the beam body and the tensile member;
the second steering part is connected with the beam body and the tensile piece;
the first steering portion and the second steering portion are used for changing the arrangement direction of the tensile member on the beam body so as to change the direction of tensile stress on the tensile member after the tensile member is tensioned.
10. The prestressed girder according to claim 8,
the device also comprises a second rear prestress adjusting device and a third rear prestress adjusting device;
the second post-prestressing adjustment means and the third post-prestressing adjustment means are both post-prestressing adjustment means according to any one of claims 1 to 7;
the second rear prestress adjusting device is arranged between the first fixing part and the first rear prestress adjusting device and is arranged on one side of the beam body bearing the compressive stress;
the third rear prestress adjusting device is arranged between the second fixing part and the first rear prestress adjusting device and is arranged on one side of the beam body bearing the compressive stress;
the limiting parts in the second rear prestress adjusting device and the third rear prestress adjusting device are connected with the tensile piece to adjust the tensile force on the tensile piece, so that the size and the direction of the prestress on the prestressed beam are adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920645376.6U CN209855046U (en) | 2019-05-04 | 2019-05-04 | Postposition prestress adjusting device and prestress beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920645376.6U CN209855046U (en) | 2019-05-04 | 2019-05-04 | Postposition prestress adjusting device and prestress beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209855046U true CN209855046U (en) | 2019-12-27 |
Family
ID=68940389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920645376.6U Active CN209855046U (en) | 2019-05-04 | 2019-05-04 | Postposition prestress adjusting device and prestress beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209855046U (en) |
-
2019
- 2019-05-04 CN CN201920645376.6U patent/CN209855046U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1007809B1 (en) | Reinforcement device for supporting structures | |
| DE19715843B4 (en) | Self-drilling stud | |
| KR101065217B1 (en) | Tension device for tension and retension | |
| CA3069911A1 (en) | Structure having edge reinforcement on profiled rail | |
| KR20150116733A (en) | Strengthen structure and method of reinforcing the outside of the reinforced concrete beams with prestressed steel wire | |
| EP1525360A1 (en) | Device and method for the reinforcing of support structures | |
| CN209855046U (en) | Postposition prestress adjusting device and prestress beam | |
| KR100357332B1 (en) | Method and its devices to strengthen a girder of bridge by external prestressing method using multiple anchorage system | |
| DE10254043A1 (en) | Composite construction of high load bearing capacity has profiled ribs are used as means of connection and are rigidly connected to wood or derived timber product and protrude into concrete | |
| EP2436845B1 (en) | Assembly for connection of a component to a structure, in particular a balcony to a building | |
| DE202010002026U1 (en) | Device for attaching a cantilevered from a building support beam | |
| EP2516761B1 (en) | Device for connecting two components separated by a gap and for absorbing transverse forces that occur between the components | |
| EP3819431B1 (en) | Reinforcement arrangement comprising an existing structure and a reinforcing device attached to same and method for reinforcing such an existing structure | |
| KR100979717B1 (en) | Prestressing system using screw joint | |
| KR100426611B1 (en) | Connecting device for enhancing steel wire for a bridge | |
| DE60304334T2 (en) | FUSE PROCEDURES FOR ENGINEERED BUILDINGS WITH TENSIONERS | |
| EP2042657A1 (en) | Device for anchoring caps to the superstructure of buildings | |
| DE10242743A1 (en) | Method for the manufacture of accurately positioned linkage to rail track of monorail maglev vehicle and rail track | |
| KR101358866B1 (en) | Prestress-loss prevention sheath and the fixture of it | |
| DE10038852A1 (en) | Device for the non-positive attachment of a console to a base body | |
| AT522359B1 (en) | Connection device for non-positive connection of at least two precast concrete parts | |
| KR200407364Y1 (en) | Wave web beam | |
| KR200264437Y1 (en) | Devices to strengthen a girder of bridge by external prestressing method using multiple anchorage system | |
| KR200305673Y1 (en) | External prestressing strengthening structure using cfrp(carbon fiber reinfroced polymer) plates | |
| DE9307041U1 (en) | Horizontal beams for buildings |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |