CN113047523A - Prestressed steel pull rod for supporting joint of steel beam of holding frame and tensioning device of prestressed steel pull rod - Google Patents
Prestressed steel pull rod for supporting joint of steel beam of holding frame and tensioning device of prestressed steel pull rod Download PDFInfo
- Publication number
- CN113047523A CN113047523A CN202110518423.2A CN202110518423A CN113047523A CN 113047523 A CN113047523 A CN 113047523A CN 202110518423 A CN202110518423 A CN 202110518423A CN 113047523 A CN113047523 A CN 113047523A
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- pull rod
- support
- joint
- sleeve
- sleeved
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C2003/026—Braces
Abstract
The invention relates to a prestressed steel pull rod for supporting a joint of a steel beam of a holding frame, which comprises: the device comprises a pull rod, a pull rod joint, a sleeve, a buffer cylinder body, a supporting plate, a fastener and an elastic gasket. The outer surface of the pull rod is provided with threads, the two ends of the pull rod are connected with the pull rod joint, and the pull rod joint is provided with a connecting hole. The sleeve is sleeved on the pull rod, and the buffer cylinder body is sleeved on the outer surface of the sleeve. The supporting plate is sleeved on the pull rod and is positioned below the sleeve. The fastener is sleeved on the pull rod and in threaded connection with the pull rod, and the fastener is arranged at the upper end of the sleeve and below the supporting plate respectively. The elastic cushion ring is sleeved on the pull rod, and one elastic cushion ring is arranged between the upper end of the sleeve and the fastening piece and between the supporting plate and the fastening piece. The prestressed steel pull rod can be used for continuously connecting steel beam nodes of all layers of linking frames in a penetrating manner, and has the advantages of novel stress of a structural system and special node structure.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a prestressed steel pull rod for supporting a steel beam node of a holding frame and a prestressed tensioning device thereof.
Background
The information disclosed in this background of the invention is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
The truss is a lattice beam structure, is commonly used for building roof structures of buildings, and is widely applied to large-span buildings, exhibitions, gymnasiums, bridges and other public buildings. The steel pull rod is a high-strength, high-plasticity and high-impact-toughness steel structural member which is manufactured by using a high-quality alloy structural steel rod or a stainless steel rod as a raw material through the working procedures of forging, machining, heat treatment, surface treatment and the like, the steel pull rod is connected with a connecting frame through small circles or threads, the main stress form is axial tension, and the conventional building steel pull rod mainly comprises an OO-shaped steel pull rod, an OU-shaped steel pull rod, a UU-shaped steel pull rod, an IO-shaped steel pull rod and the like. The building steel pull rod is mainly applied to beam string structures, inter-column supports, roof horizontal supports, diagonal structures and suspender systems. However, the existing building steel tension is not well suitable for connecting and suspending steel beam nodes in a multi-layer connection frame.
Disclosure of Invention
Aiming at the problems, the invention provides the prestressed steel pull rod for supporting the steel beam joints of the connection frame and the tensioning device thereof, the prestressed steel pull rod can be continuously connected with the steel beam joints of the connection frames at all layers in a penetrating manner, and the prestressed steel pull rod has the advantages of novel stress of a structural system and special joint structure. In order to achieve the above object, the technical solution of the present invention is as follows.
In a first aspect of the present invention, there is disclosed a prestressed tension bar for a joint support of a truss steel beam, comprising: pull rod, pull rod joint, sleeve, buffering barrel, layer board, fastener and pad elastic ring, wherein: the outer surface of the pull rod is provided with threads, the two ends of the pull rod are connected with the pull rod joint, the pull rod joint is provided with a connecting hole, and the width of the pull rod joint is larger than the diameter of the pull rod. The sleeve is sleeved on the pull rod, and the buffer cylinder body is sleeved on the outer surface of the sleeve. The supporting plate is sleeved on the pull rod and is positioned below the sleeve to support the joint of the connecting frame. The fastener is sleeved on the pull rod and in threaded connection with the pull rod, and the fastener is arranged at the upper end of the sleeve and below the supporting plate respectively. The elastic cushion ring is sleeved on the pull rod, and one elastic cushion ring is arranged between the upper end of the sleeve and the fastening piece and between the supporting plate and the fastening piece.
Further, the support node plate connecting structure further comprises a pin shaft assembly which is connected with the connecting hole in a matched mode, so that the pull rod joint is connected with the support node plate conveniently.
Further, the sleeve is the metal material, buffering barrel and cushion elastic ring are the rubber material, because the sleeve is the position that is used for supporting the girder steel node, not only help the shock attenuation through the buffering barrel that sets up the rubber material and cushion elastic ring, help preventing the node moreover and warp.
Furthermore, a plurality of sleeves are distributed on the pull rod at intervals, the buffer cylinder body is sleeved on the sleeves, and the supporting plate, the fastening piece and the elastic gasket ring are arranged at two ends of each sleeve.
Further, the fastener is the nut, and it can restrain the layer board and move down, forms effective support to the layer board, and the layer board can provide the support of bigger area to the girder steel node of top.
Furthermore, the surface of the pull rod is provided with a layer of anticorrosive coating so as to improve the anticorrosive performance of the pull rod.
In a second aspect of the present invention, a tension apparatus of the prestressed tension bar is disclosed, comprising: left socle, right branch frame, connecting plate, first hold-down mechanism, second hold-down mechanism, first holding-down plate and second holding-down plate, wherein: the structure of left socle and right branch frame is the same, and the upper portion of left socle, right branch frame forms "mouth" font support after can dismantling the connection through the connecting plate, and the upper portion butt joint department of left socle, right branch frame has the opening to the pull rod gets into, all has the recess on the lower part butt joint terminal surface of left socle, right branch frame, so that put into the support. The first pressing mechanism and the second pressing mechanism are vertically arranged in the left support and the right support respectively, and the first pressing mechanism and the second pressing mechanism are symmetrical left and right. The first lower pressing plate is fixedly connected to the lower end of the first lower pressing mechanism, the second lower pressing plate is fixedly connected to the lower end of the second lower pressing mechanism, a horizontally arranged U-shaped groove is formed in the contact position of the left end face of the first lower pressing plate and the right end face of the second lower pressing plate, and the width of the U-shaped groove is larger than the diameter of the pull rod and smaller than the width of a pull rod joint.
Furthermore, the first pressing mechanism and the second pressing mechanism comprise any one of a hydraulic oil cylinder, a jack and the like, and the pressing mechanism drives the pressing plate to move up and down, so that the prestress connection of the pull rod is completed.
Furthermore, the two ends of the connecting plate are connected to the rear side walls of the left support and the right support through bolts, so that the pull rod can be conveniently placed into the opening in the front side wall. The left support and the right support are temporarily combined together through the detachable connection of the connecting plate.
Further, the lower parts of the left support and the right support are also detachably connected through the connecting plate, so that the stability of the left support and the right support is further improved.
Compared with the prior art, the invention has the following beneficial effects:
(1) when the prestressed steel pull rod is used, the prestressed steel pull rod sequentially penetrates through holes at steel beam nodes of all the layers of linking frames, the steel beam nodes are supported by the supporting plate, the lower flange of the steel beam is supported on the elastic washer on the supporting plate, and the upper flange of the steel beam is fixed with the pull rod through the fastening piece, so that the steel beam nodes of all the layers of the linking frames are connected in a penetrating mode, the nodes can be effectively prevented from deforming through the elastic washer on the supporting plate, and the damping effect is achieved. Meanwhile, the elastic gasket and other components can only transmit normal pressure and tangential friction force but not normal tension force, so that the steel beam node can be effectively supported, and the elastic gasket can play an important role particularly when being used for building design with special structures such as a large-scale science and technology museum. Calculating after trial: 5 tons (t) of materials are saved in the whole construction process, the construction period is 30 days, and 180 workers are saved, the economic benefit is =5t multiplied by 12000 yuan +5000 yuan/day multiplied by 30 days +300 yuan/worker multiplied by 180 workers =258000 yuan, the generation of construction waste is greatly reduced, and the whole construction process is more energy-saving and environment-friendly.
(2) The invention designs a special tensioning device for connecting the lower end of the prestressed steel pull rod for supporting the steel beam joint of the joining frame to a support on the ground after tensioning, and the tensioning device can meet the requirement of accommodating the support on the ground by arranging a temporary combined bracket in a shape like a Chinese character kou so as to be convenient for butt joint with a pull rod joint above and can tension a vertical pull rod. Meanwhile, the U-shaped groove is formed in the lower pressing plate, so that the U-shaped groove can be matched with the pull rod ingeniously, the pull rod can be clamped into the U-shaped groove conveniently, the pull rod can be tensioned under the action of the pressing mechanism, and finally the pull rod joint is connected with a support below the pull rod joint in a tensioning mode.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural view of a prestressed steel tie for supporting a steel beam node of a truss according to an embodiment of the present invention.
Fig. 2 is a schematic view of the connection between the prestressed steel tie bar and the steel beam node for supporting the steel beam node of the truss according to the embodiment of the present invention.
Fig. 3 is a front view of a tension device for prestressed steel tie rods in an embodiment of the present invention.
Fig. 4 is a top view of a tension apparatus for prestressed tension rods in an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of the first lower pressing plate and the second lower pressing plate after being combined in the embodiment of the invention.
The scores in the above figures represent: the device comprises a pull rod 1, a pull rod connector 2, a sleeve 3, a buffer cylinder 4, a supporting plate 5, a fastener 6, a washer 7, a connecting hole 8, a bolt 9, an H-shaped steel beam node 10, a left support 11, a right support 12, a connecting plate 13, a first pressing mechanism 14, a second pressing mechanism 15, a first pressing plate 16, a second pressing plate 17, an opening 18, a groove 19, a U-shaped groove 20 and a support 21.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate that the directions of movement are consistent with those of the drawings, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element needs to have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. The description will be further described with reference to the drawings and specific examples.
Referring to fig. 1 and 2, there is illustrated a prestressed tension bar for a joint support of a truss steel beam, which mainly comprises: pull rod 1, pull rod joint 2, sleeve 3, buffering barrel 4, layer board 5, fastener 6 and pad elastic ring 7, wherein:
the pull rod 1 is a stainless steel solid rod, threads are arranged on the outer surface of the pull rod 1, and an anti-corrosion layer is arranged on the surface of the pull rod 1 to improve the anti-corrosion performance of the pull rod.
The two ends of the pull rod 1 are connected with the pull rod joints 2, the pull rod joints 2 are provided with connecting holes 8, and the width of the pull rod joints 2 is larger than the diameter of the pull rod 1. The pull rod connector comprises a connecting hole and a connecting rod connector 2, and further comprises a pin shaft assembly which is matched and connected with the connecting hole so as to connect the pull rod connector 2 to the fixed support.
The sleeve 3 is a cylinder made of cast iron and is sleeved on the pull rod 1, and the buffer cylinder body 4 is a rubber pad and is sleeved on the outer surface of the sleeve 3. The supporting plate 5 is sleeved on the pull rod 1, and the supporting plate 5 is located below the sleeve 3 to support the joint of the connecting frame.
The fastening pieces 6 are nuts which are sleeved on the pull rod 1 and are in threaded connection with the pull rod 1, and the fastening pieces 6 are respectively arranged at the upper end of the sleeve 3 and the lower end of the supporting plate 5. The elastic cushion ring 7 is sleeved on the pull rod 1, and one elastic cushion ring 7 is arranged between the upper end of the sleeve 3 and the fastening piece 6 and between the supporting plate 5 and the fastening piece 6 and between the elastic cushion ring 7 and the fastening piece 6. The fasteners 6 may restrain the pallet 5 from moving downward, providing effective support for the pallet 5, while the pallet 5 may provide a greater area of support for the steel beam nodes above. A plurality of sleeves 3 are distributed on the pull rod 1 at intervals, the buffer cylinder bodies 4 are sleeved on the sleeves 3, and the supporting plates 5, the fasteners 6 and the cushion elastic rings 7 are arranged at two ends of each sleeve 3. Since the sleeve 3 is a portion for supporting a steel beam node, the rubber cushion cylinder 4 and the cushion elastic ring 7 contribute not only to damping but also to preventing deformation of the node.
During the use, pass the through-hole that this kind of prestressing force steel pull rod held up the H shaped steel girder node 10 department of frame in each layer in proper order to form the support to the girder steel node through the layer board, the girder steel bottom flange supports on the elastic washer on the layer board, and the top flange passes through the fastener and is fixed together with the pull rod, has not only realized holding up the through connection of the girder steel node of frame to each layer, can effectively prevent through the elastic washer on the layer board that the node warp moreover, still plays absorbing effect. Meanwhile, the elastic washer and other components can only transmit normal pressure and tangential friction force, but not normal tension force, so that the steel beam node can be effectively supported.
The application of the prestressed steel pull rod changes the condition that a formwork support system needs to be erected when a ramp is constructed outside the structure, saves extra frame columns needed in the traditional method, saves the lease cost of a large number of formworks and frame pipes, reduces the occupation of a field, and has more attractive and elegant final forming effect. The brand new steel pull rod mounting and tensioning process greatly shortens the construction period. Calculating after trial: 5 tons (t) of materials are saved in the whole construction process, the construction period is 30 days, and 180 workers are saved, the economic benefit is =5t multiplied by 12000 yuan +5000 yuan/day multiplied by 30 days +300 yuan/worker multiplied by 180 workers =258000 yuan, the generation of construction waste is greatly reduced, and the whole construction process is more energy-saving and environment-friendly.
Further, with reference to fig. 3 to 5, a prestressed tension rod tensioner is disclosed, which is specifically used in fig. 1 and 2, and comprises: left socle 11, right branch frame 12, connecting plate 13, first mechanism 14, the second mechanism 15, first holding down plate 16 and the second holding down plate 17 down, wherein:
the steel frame that left socle 11 and right branch frame 12 are the same in structure, the upper portion of left socle 11, right branch frame 12 can be dismantled through connecting plate 13 and connect the back formation "mouth" font support, just bolted connection is passed through on the rear wall of left socle 11, right branch frame 12 at the both ends of connecting plate 13, and the upper portion butt joint department of left socle 11, right branch frame 12 has opening 18, thereby can conveniently with pull rod 1 is put into from opening 18 of front wall department, makes left socle 11 and right branch frame 12 combine together temporarily through the connection of dismantling of connecting plate 13.
The lower butt joint end faces of the left bracket 11 and the right bracket 12 are respectively provided with a groove 19 so as to be convenient for placing a support 21 when carrying out combined butt joint. The first downward-pressing mechanism 14 and the second downward-pressing mechanism 15 are vertically arranged in the left support 11 and the right support 12 respectively, and the first downward-pressing mechanism 14 and the second downward-pressing mechanism 15 are symmetrical left and right. The first pressing mechanism 14 and the second pressing mechanism 15 are hydraulic oil cylinders, and the pressing mechanisms drive the pressing plates to move up and down, so that the prestressed connection of the pull rod is completed.
The first lower pressing plate 16 is fixedly connected to the lower end of the first lower pressing mechanism 14, the second lower pressing plate 17 is fixedly connected to the lower end of the second lower pressing mechanism 15, a horizontally arranged U-shaped groove 20 is formed in the contact position of the left end face of the first lower pressing plate 16 and the right end face of the second lower pressing plate 17, and the width of the U-shaped groove 20 is larger than the diameter of the pull rod 1 and smaller than the width of the pull rod joint 2.
When the tensioning device is adopted, the left support 11 and the right support 12 which are fixed with the pressing mechanism and the pressing plate are combined together, and the rear wall surfaces of the upper parts of the left support 11 and the right support 12 are detachably combined together by adopting a connecting plate 13 and a bolt to form the square support. In order to further increase the stability of the left bracket 11 and the right bracket 12, the lower parts of the left bracket 11 and the right bracket 12 are also detachably connected through the connecting plate 13 and the bolt.
Then, the square-shaped support is hung above a support 21 on the ground, the square-shaped support is placed down, the support 21 is located in the groove 19, the pull rod 1 is placed into the groove from the opening 18 in the front side wall, the pull rod 1 enters the U-shaped groove 20, at the moment, the pull rod joint 2 at the upper end of the pull rod 1 is fixed, and the pull rod joint 2 at the lower end of the pull rod 1 is located above the support 21. Through the temporarily combined square-shaped support, the accommodation of a support on the ground can be met, so that the support can be conveniently butted with a pull rod joint above, and the tensioning of a vertical pull rod can be realized.
Then, the first pressing mechanism 14 and the second pressing mechanism 15 respectively drive the first pressing plate 16 and the second pressing plate 17 to move downwards, when the pressing plates move to the joint of the pull rod 1 and the pull rod joint 2, the movement of the pressing plates is limited because the width of the U-shaped groove 20 is larger than the diameter of the pull rod 1 and smaller than the width of the pull rod joint 2, prestress is further applied to the pull rod along with the continuous downward movement of the pressing plates, and the pull rod joint 2 is connected with the support 21 through a pin shaft when a preset stress value is reached. Then the first and second pressing mechanisms 14 and 15 move upwards to complete the prestressed connection of the pull rod 1. It can be seen that, simultaneously, the U-shaped groove 20 is arranged on the lower pressing plate, so that the U-shaped groove can be skillfully matched with the pull rod 1, the pull rod 1 can be conveniently clamped into the U-shaped groove 20, the pull rod can be tensioned under the action of the pressing mechanism, and finally, the pull rod joint is tensioned and connected with a support below.
It should be noted that the tensioning device may be used in combination with the tensioning device in other ways than the above-mentioned way of use to tension the tie rod, i.e. the above-mentioned way of use is not limited to this particular tensioning device.
Finally, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. A prestressed tension bar for a truss steel beam node support, comprising:
a tie-rod joint;
the outer surface of the pull rod is provided with threads, two ends of the pull rod are connected with the pull rod joints, the pull rod joints are provided with connecting holes, and the width of each pull rod joint is larger than the diameter of the pull rod;
the sleeve is sleeved on the pull rod;
the buffer cylinder is sleeved on the outer surface of the sleeve;
the supporting plate is sleeved on the pull rod and is positioned below the sleeve;
the fastening piece is sleeved on the pull rod and in threaded connection with the pull rod, and the fastening piece is arranged at the upper end of the sleeve and below the supporting plate respectively; and
the elastic cushion ring is sleeved on the pull rod, and one elastic cushion ring is arranged between the upper end of the sleeve and the fastening piece and between the supporting plate and the fastening piece.
2. The prestressed tension bar for a joint support of a steel truss according to claim 1, further comprising a pin assembly cooperatively connected to said connecting hole to facilitate connection of the tension bar joint to a brace gusset plate.
3. The prestressed tension bar for a joint support of a steel frame and a steel beam according to claim 1, wherein said sleeve is made of metal, and said buffer cylinder and said elastic washer are made of rubber.
4. The prestressed steel pull rod for the joint support of the steel girder of the connection frame according to claim 1, wherein a plurality of sleeves are distributed on the pull rod at intervals, the buffer cylinder bodies are sleeved on the sleeves, and the supporting plate, the fastening piece and the cushion elastic ring are arranged at two ends of each sleeve.
5. The prestressed tension bar of claim 1, wherein said fasteners are nuts.
6. The prestressed tension bar for a joint support of a truss steel beam according to claim 1, wherein the surface of the tension bar 1 has a corrosion-resistant layer.
7. A tensioning device for prestressed tension rods for joint support of truss steel girders according to any one of claims 1-6, comprising: left socle, right branch frame, connecting plate, first hold-down mechanism, second hold-down mechanism, first holding-down plate and second holding-down plate, wherein: the left support and the right support have the same structure, the upper parts of the left support and the right support are detachably connected through a connecting plate to form a square support, and an opening is formed at the joint of the upper parts of the left support and the right support; grooves are formed in the butt joint end faces of the lower parts of the left bracket and the right bracket; the first pressing mechanism and the second pressing mechanism are vertically arranged in the left bracket and the right bracket respectively, and are symmetrical left and right; the first lower pressing plate is fixedly connected to the lower end of the first lower pressing mechanism, the second lower pressing plate is fixedly connected to the lower end of the second lower pressing mechanism, a horizontally arranged U-shaped groove is formed in the contact position of the left end face of the first lower pressing plate and the right end face of the second lower pressing plate, and the width of the U-shaped groove is larger than the diameter of the pull rod and smaller than the width of a pull rod joint.
8. The tensioner as in claim 7, wherein the first and second hold-down mechanisms comprise any one of a hydraulic ram, a jack.
9. The tensioner as in claim 7, wherein the connecting plate is bolted at both ends to the rear side walls of the left and right brackets.
10. The tensioner as in claim 7, wherein the lower portions of the left and right brackets are also removably connected by the connecting plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110518423.2A CN113047523B (en) | 2021-05-12 | 2021-05-12 | Prestressed steel pull rod for truss steel beam node support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110518423.2A CN113047523B (en) | 2021-05-12 | 2021-05-12 | Prestressed steel pull rod for truss steel beam node support |
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| CN113047523A true CN113047523A (en) | 2021-06-29 |
| CN113047523B CN113047523B (en) | 2021-11-16 |
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Cited By (1)
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| CN113817913A (en) * | 2021-09-30 | 2021-12-21 | 新余钢铁股份有限公司 | Pull rod device for steel tapping machine and assembling method thereof |
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| US20140373481A1 (en) * | 2012-01-13 | 2014-12-25 | Monica Serafini | Lattice Girder Structure Using Innovative Multiple Joints For Roof Covering Purposes |
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