CN212376063U - Prestress self-resetting node structure of external energy-consuming steel bar - Google Patents
Prestress self-resetting node structure of external energy-consuming steel bar Download PDFInfo
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- CN212376063U CN212376063U CN202020596267.2U CN202020596267U CN212376063U CN 212376063 U CN212376063 U CN 212376063U CN 202020596267 U CN202020596267 U CN 202020596267U CN 212376063 U CN212376063 U CN 212376063U
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Abstract
The utility model discloses a prestressing force of external power consumption rod iron is from restoring to throne node structure, including precast beam component, precast column component, unbonded prestressing tendons, power consumption rod iron, high strength friction type bolt, angle steel sub-assembly and the layer of caulking. Compared with the prior art, the energy-consuming steel bar solves the problem of compression buckling of the energy-consuming steel bar in the prior art, and is convenient and quick to replace; the angle steel assembly can be used as a lower support during splicing; the energy-consuming steel bar is fixed on the angle steel assembly, the inner force arm is enlarged, the energy-consuming capability of the structure is enhanced, and the opening avoids the node core area, so that the excessive weakening of the node core area is avoided; the screwed energy-consuming steel bar provides partial shearing force, so that the shearing redundancy is increased; the beam column splicing is realized through the unbonded prestressed tendons, and the joint has a good self-resetting function.
Description
Technical Field
The utility model relates to a bridge construction technical field especially relates to a prestressing force of external power consumption rod iron is from restoring to throne node structure.
Background
Cast-in-place structure and traditional assembly monolithic structure antidetonation design theory are equivalent, through ductility design dissipation seismic energy promptly, avoid the structure to take place brittle failure and collapse even, but structural damage and residual deformation are very big after the shake, and repair cost is higher or even unable the restoration, and whole structure can only be pushed down and rebuild, causes huge waste. In addition, both structures require on-site wet work and the construction procedure is complex. The prestressed self-resetting concrete structure does not need on-site wet operation, belongs to dry connection, and more importantly, the structure is reset by utilizing the resilience effect of the prestressed tendons after the earthquake, the residual deformation is very small, the damage is concentrated on the joint and can be generally limited on an energy consumption element, the restoration after the earthquake is simple and rapid, and the rapid restoration of the structure function after the earthquake can be realized.
The prestressed self-resetting structure has poor energy consumption capability, and additional energy consumption components are generally needed to enhance the energy consumption capability of the structure. The prior art usually adopts measures that energy-consuming steel bars are embedded in grooves at the beam ends, but the construction and the replacement after the earthquake are inconvenient and the problem of buckling under pressure exists; the web friction type prestress prefabricated frame structure needs to embed a large steel plate in a node and a beam end, the requirement on the flatness of a component is high, top and bottom angle steel is required to be installed at the beam end for energy consumption, and the requirement on the positioning of bolt holes is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a prestressing force of external power consumption rod iron is from restoring to throne node structure for solve the technical problem that above-mentioned prior art exists, strengthen the power consumption ability of structure, and be convenient for the structure after the earthquake resume rapidly.
In order to achieve the above object, the utility model provides a following scheme:
the utility model discloses a prestressed self-reset node structure of an external energy-consuming steel bar, which comprises a precast beam component, a precast column component, unbonded prestressed tendons, an energy-consuming steel bar, high-strength friction type bolts, angle steel assembly components and a joint filling layer, wherein the two precast beam components are symmetrically distributed on the left side and the right side of the precast column component and are collinear, the precast beam component and the precast column component are provided with prestressed tendon holes which are communicated with each other, the unbonded prestressed tendons pass through the prestressed tendon holes, the angle steel assembly components are fixed at the opposite ends of the two precast beam components, the angle steel assembly components comprise a first angle steel assembly component fixed on the upper surface of the precast beam component and a second angle steel assembly component fixed on the lower surface of the precast beam component, and the first angle steel assembly component and the second angle steel assembly component on the same precast beam component are fixedly connected through a fastening component, the first angle steel assemblies on the two precast beam members, which are opposite to each other, are fixedly connected through an energy dissipation assembly, the second angle steel assemblies on the two precast beam members, which are opposite to each other, are fixedly connected through an energy dissipation assembly, the fastening assembly comprises a high-strength friction-type bolt and a first nut, the small-diameter end of the high-strength friction-type bolt penetrates through the second angle steel assemblies, the precast beam members and the first angle steel assemblies and then is in threaded connection with the first nut, the energy dissipation assembly comprises an energy dissipation steel bar and a second nut, the energy dissipation steel bar comprises an energy dissipation section in the middle and reinforcement sections at two ends, the diameter of each reinforcement section is larger than that of each energy dissipation section, external threads are arranged on the reinforcement sections, and the energy dissipation steel bar penetrates through the precast column members and the first angle steel assemblies at two sides or penetrates through the precast column members and the second angle steels at two sides, the second nuts are in threaded connection with two ends of the energy-consuming steel bar, and the joint filling layer is filled between the precast beam component and the precast column component.
Preferably, the diameter of a through hole on the prefabricated column component for the energy dissipation steel bar to pass through is D1The diameter of the reinforcing section is D2，D1-D2≥2mm。
Preferably, the joint filling material of the joint filling layer is UHPC mortar, the strength grade of the UHPC mortar is more than or equal to 80MPa, and the thickness of the joint filling layer is 15-20 mm.
Preferably, the angle steel sub-assembly includes angle steel and angle steel vertical limb stiffening steel frame, angle steel vertical limb stiffening steel frame is two sections open-ended square box body structures, one side of angle steel stiffening steel frame with the vertical limb welding of angle steel links to each other, another just right side of angle steel stiffening steel frame with prefabricated post component offsets.
Preferably, horizontal stiffening plates are welded in the angle steel vertical limb stiffening steel frame.
The utility model discloses for prior art gain following technological effect:
1. the external energy-consuming steel bar penetrates through the hole in the prefabricated column component and is anchored on the angle steel assembly through the second nut, the energy-consuming steel bar is always in a pulled state, and the energy-consuming section is restrained by the hole in the column, so that the problem of compression and buckling of the energy-consuming steel bar is solved;
2. the energy-consuming steel bar is connected with the angle steel assembly through the second nut, and the energy-consuming section is buckled or broken under the action of an earthquake, so that the energy-consuming steel bar is convenient and quick to replace;
3. the angle steel assembly can be used as a lower support during splicing;
4. the energy-consuming steel bar is fixed on the angle steel assembly, the inner force arm is enlarged, the energy-consuming capability of the structure is enhanced, and the opening avoids the node core area, so that the excessive weakening of the node core area is avoided;
5. the screwed energy-consuming steel bar provides partial shearing force, so that the shearing redundancy is increased;
6. the beam column splicing is realized through the unbonded prestressed tendons, and the joint has a good self-resetting function.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a prestressed self-resetting node structure of an external energy-consuming steel bar according to the embodiment;
fig. 2 is a schematic diagram of the deformed prestressed self-resetting node structure of the external energy-consuming steel bar of the embodiment;
FIG. 3 is a schematic structural view of an angle iron assembly;
FIG. 4 is a schematic structural view of a steel frame for stiffening the vertical limbs of the angle steel;
FIG. 5 is a schematic structural view of an energy dissipating steel bar;
description of reference numerals: 1-precast beam members; 2-prefabricating a column member; 3-prestressed tendon holes; 4-unbonded prestressed tendons; 5-angle steel assembly; 6-energy consumption steel bar; 7-high strength friction type bolts; 8-a gap filling layer; 9-angle steel; 10-angle steel vertical limb stiffening steel frame; 11-a first side panel; 12-a second side panel; 13-a top plate; 14-a base plate; 15-a reinforcement section; and 16-energy consumption section.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a prestressing force of external power consumption rod iron is from restoring to throne node structure for solve the technical problem that above-mentioned prior art exists, strengthen the power consumption ability of structure, and be convenient for the structure after the earthquake resume rapidly.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 5, the embodiment provides a prestressed self-resetting node structure of an external energy-consuming steel bar, which includes a precast beam member 1, a precast column member 2, an unbonded prestressed tendon 4, an energy-consuming steel bar 6, a high-strength friction bolt 7, an angle iron assembly 5, and a gap filling layer 8.
Wherein, two precast beam components 1 symmetric distribution are in precast column component 2 left and right sides and collineation, are equipped with the prestressing tendons hole 3 of intercommunication each other on precast beam component 1 and the precast column component 2, and unbonded prestressing tendons 4 passes prestressing tendons hole 3. The angle steel assembly 5 is fixed to opposite ends of the two precast beam members 1, and the angle steel assembly 5 includes a first angle steel assembly 5 fixed to an upper surface of the precast beam member 1 and a second angle steel assembly 5 fixed to a lower surface of the precast beam member 1. The first angle steel assembly parts 5 and the second angle steel assembly parts 5 on the same precast beam member 1 are fixedly connected through fastening components, the first angle steel assembly parts 5 on the two precast beam members 1, which are opposite in position, are fixedly connected through energy dissipation components, and the second angle steel assembly parts 5 on the two precast beam members 1, which are opposite in position, are fixedly connected through energy dissipation components. The fastening component comprises a high-strength friction type bolt 7 and a first nut, and the small-diameter end of the high-strength friction type bolt 7 penetrates through the second angle steel assembly 5, the precast beam component 1 and the first angle steel assembly 5 and then is in threaded connection with the first nut. The energy dissipation assembly comprises an energy dissipation steel bar 6 and a second nut, wherein the energy dissipation steel bar 6 comprises an energy dissipation section 16 in the middle and reinforcement sections 15 at two ends. The diameter of the reinforcing section 15 is larger than that of the energy consumption section 16, and the reinforcing section 15 is provided with external threads. The energy dissipation steel bar 6 penetrates through the prefabricated column component 2 and the first angle steel assembly parts 5 on two sides or penetrates through the prefabricated column component 2 and the second angle steel assembly parts 5 on two sides, and the second nuts are in threaded connection with two ends of the energy dissipation steel bar 6. The gap filling layer 8 is filled between the precast beam member 1 and the precast column member 2.
Specifically, the diameter of the through hole for the energy dissipation steel bar 6 on the prefabricated column member 2 in this embodiment is D1The diameter of the reinforcing section 15 is D2，D1-D2Not less than 2 mm; the joint filling material of the joint filling layer 8 in the embodiment is preferably UHPC mortar, the strength grade of the UHPC mortar is more than or equal to 80MPa, and the thickness of the joint filling layer 8 is 15-20 mm;
the form of the angle steel assembly 5 is various, and can be selected by the person skilled in the art according to the actual needs. In this embodiment, angle assembly 5 includes angle 9 and angle vertical-limb stiffening frame 10. The angle steel vertical limb stiffening steel frame 10 is a square box structure with two sections of openings and is formed by welding a first side plate 11, a second side plate 12, a top plate 13 and a bottom plate 14. The first side plate 11 is connected with the vertical limbs of the angle steel 9 in a welding mode, and the second side plate 12 abuts against the prefabricated column component 2.
In order to improve the overall strength of the angle steel vertical-limb stiffening steel frame 10, a person skilled in the art may weld a horizontal stiffening plate inside the angle steel vertical-limb stiffening steel frame 10.
The embodiment also provides an assembly method of the external energy consumption steel bar prestress self-resetting node structure, which comprises the following steps:
s1, in the construction stage, a second angle steel assembly 5 is fixedly installed on a prefabricated column component 2 through a high-strength friction type bolt 7 to serve as a support of the prefabricated beam component 1, the prefabricated beam component 1 is in place, unbonded prestressed tendons 4 penetrate through holes 3 of the prefabricated beam component 1 and the prefabricated column component 2, a side mold required by mortar injection is installed by taking the second angle steel assembly 5 as a lower template, and UHPC mortar is injected into a joint of the prefabricated beam component 1 and the prefabricated column component 2 to form a joint filling layer 8;
s2, after mortar is initially solidified, removing the side die, and installing a first angle steel assembly 5, wherein the first angle steel assembly 5 and a second angle steel assembly 5 are initially screwed through a vertical high-strength friction type bolt 7 penetrating through the precast beam component 1, the pretightening force is about 0.5fpu, and the first angle steel assembly 5 and the precast column component 2 are fixed on the precast column component 2 by the high-strength friction type bolt 7;
s3, after the unbonded prestressed tendons 4 are stretched to control stress, the high-strength friction type bolts 7 connecting the angle steel assembly 5 and the prefabricated column component 2 are removed, the energy-consuming steel bars 6 are installed, pretightening force is applied to enable the energy-consuming steel bars 6 to be in a stretched and tightened state, the pretightening force is about 0.2fpu, and the vertical high-strength friction type bolts 7 penetrating through the prefabricated beam component 1 and connecting the first angle steel assembly 5 and the second angle steel assembly 5 are tightened to the designed tensile force.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (5)
1. A prestressed self-resetting node structure of an external energy-consuming steel bar is characterized by comprising precast beam components, precast column components, unbonded prestressed tendons, an energy-consuming steel bar, high-strength friction type bolts, angle steel assemblies and a gap filling layer, wherein the two precast beam components are symmetrically distributed on the left side and the right side of each precast column component and are collinear, the precast beam components and the precast column components are provided with prestressed tendon holes which are communicated with each other, the unbonded prestressed tendons penetrate through the prestressed tendon holes, the angle steel assemblies are fixed at the opposite ends of the two precast beam components, each angle steel assembly comprises a first angle steel assembly fixed on the upper surface of each precast beam component and a second angle steel assembly fixed on the lower surface of each precast beam component, and the first angle steel assembly and the second angle steel assembly on the same precast beam component are fixedly connected through fastening components, the first angle steel assemblies on the two precast beam members, which are opposite to each other, are fixedly connected through an energy dissipation assembly, the second angle steel assemblies on the two precast beam members, which are opposite to each other, are fixedly connected through an energy dissipation assembly, the fastening assembly comprises a high-strength friction-type bolt and a first nut, the small-diameter end of the high-strength friction-type bolt penetrates through the second angle steel assemblies, the precast beam members and the first angle steel assemblies and then is in threaded connection with the first nut, the energy dissipation assembly comprises an energy dissipation steel bar and a second nut, the energy dissipation steel bar comprises an energy dissipation section in the middle and reinforcement sections at two ends, the diameter of each reinforcement section is larger than that of each energy dissipation section, external threads are arranged on the reinforcement sections, and the energy dissipation steel bar penetrates through the precast column members and the first angle steel assemblies at two sides or penetrates through the precast column members and the second angle steels at two sides, the second nuts are in threaded connection with two ends of the energy-consuming steel bar, and the joint filling layer is filled between the precast beam component and the precast column component.
2. The external energy consumption steel bar prestressed self-resetting node structure of claim 1, wherein the diameter of the through hole on the prefabricated column member for the energy consumption steel bar to pass through is D1The diameter of the reinforcing section is D2，D1-D2≥2mm。
3. The external energy dissipation steel bar prestress self-reset node structure as recited in claim 1, wherein the joint filling material of the joint filling layer is UHPC mortar, the strength grade of the UHPC mortar is not less than 80MPa, and the thickness of the joint filling layer is 15-20 mm.
4. The external energy-consuming steel bar prestressed self-resetting node structure as claimed in claim 1, wherein said angle steel assembly comprises an angle steel and an angle steel vertical limb stiffening steel frame, said angle steel vertical limb stiffening steel frame is a square box structure with two open sections, one side of said angle steel stiffening steel frame is welded to said vertical limb of said angle steel, and the other opposite side of said angle steel stiffening steel frame is abutted to said prefabricated column member.
5. The externally-arranged energy-dissipating steel bar prestressed self-resetting node structure as claimed in claim 4, wherein horizontal stiffening plates are welded in the angle steel vertical-limb stiffening steel frames.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020596267.2U CN212376063U (en) | 2020-04-20 | 2020-04-20 | Prestress self-resetting node structure of external energy-consuming steel bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020596267.2U CN212376063U (en) | 2020-04-20 | 2020-04-20 | Prestress self-resetting node structure of external energy-consuming steel bar |
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| Publication Number | Publication Date |
|---|---|
| CN212376063U true CN212376063U (en) | 2021-01-19 |
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| CN202020596267.2U Expired - Fee Related CN212376063U (en) | 2020-04-20 | 2020-04-20 | Prestress self-resetting node structure of external energy-consuming steel bar |
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| CN (1) | CN212376063U (en) |
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- 2020-04-20 CN CN202020596267.2U patent/CN212376063U/en not_active Expired - Fee Related
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Granted publication date: 20210119 |