CN108978882B - Method for enhancing bonding between reinforcing steel bar and concrete based on steel fiber magnetic attraction principle - Google Patents
Method for enhancing bonding between reinforcing steel bar and concrete based on steel fiber magnetic attraction principle Download PDFInfo
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- CN108978882B CN108978882B CN201810955120.5A CN201810955120A CN108978882B CN 108978882 B CN108978882 B CN 108978882B CN 201810955120 A CN201810955120 A CN 201810955120A CN 108978882 B CN108978882 B CN 108978882B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
Abstract
The invention discloses a method for bonding reinforcing steel bars and concrete based on a steel fiber magnetic attraction principle, which comprises the steps of setting an assembly type building component and a building component to be inserted, setting a reserved node gap on the assembly type building component, and setting an inserted steel bar on the building component to be inserted; setting concrete and steel fibers, and mixing and stirring the concrete and the steel fibers uniformly to generate steel fiber concrete; pouring the steel fiber concrete into the joint gaps, and magnetizing the steel bars to be inserted in a strong magnetic field environment to generate magnetized steel bars; and (4) inserting the building element to be inserted into the assembly, namely inserting the magnetized steel bars which are provided with temporary magnetism into the joint gaps filled with the steel fiber concrete. Utilize the principle of magnetism to inhale, insert the steel reinforcement can magnetism inhale the steel fibre in the concrete around, form the form of similar "wolf teeth stick", and then let reinforcing bar and concrete in the assembly type structure node form reliable bonding to the tensile strength and the wholeness of assembly type structure node have been improved.
Description
Technical Field
The invention relates to a technology for enhancing the bonding between a steel bar and concrete, in particular to a method for enhancing the bonding between the steel bar and the concrete based on a steel fiber magnetic attraction principle.
Background
The fabricated building is widely popularized at home and abroad with the advantages of short construction period, resource saving, cost saving, little environmental pollution and the like, and the node linking treatment between two connecting members in the assembling process of the fabricated building is a key influencing the whole building structure. The node is a weak link of the whole building structure, and the tensile strength is weaker than that of other places of the building structure; the integrity of the node is low, so that the anti-seismic performance of the structure is reduced; in the service process of the building structure, damage is easy to occur at the nodes, and the safety performance of the whole building structure is further damaged due to the failure of the nodes.
The connection mode of the existing assembly type building node mainly comprises a wet connection mode and a dry connection mode. Wet connections have better integrity than dry connections and are the most common connection. The existing wet connection method mainly comprises the following steps: grout anchor connection, common post-cast integral connection, common cast-in-place connection and grouting assembly. These methods all use the bonding of steel bars and concrete to ensure the tensile strength and integrity of the joint. The effective bonding between the steel reinforcement and the concrete directly affects the integrity and seismic performance of the wet-fit building. There is currently no simple and reliable way to effectively enhance the tensile strength and integrity of a joint between two connecting members.
Disclosure of Invention
The invention aims to provide a method for enhancing the bonding between a steel bar and concrete based on a steel fiber magnetic attraction principle, which can effectively solve the technical problem.
In order to effectively solve the technical problems, the technical scheme adopted by the invention is as follows:
a method for enhancing the bonding between a reinforcing steel bar and concrete based on a steel fiber magnetic attraction principle comprises the following steps:
(1) setting an assembly type building component and a building component to be inserted, wherein a reserved node gap is set on the assembly type building component, and an inserted steel bar is set on the building component to be inserted;
(2) setting concrete and steel fibers, and mixing and stirring the concrete and the steel fibers uniformly to generate steel fiber concrete;
(3) pouring the steel fiber concrete into the joint gaps, and magnetizing the steel bars to be inserted in a strong magnetic field environment to generate magnetized steel bars;
(4) inserting the building component to be inserted into the assembly, namely inserting the magnetized steel bars with temporary magnetism into the joint gaps filled with the steel fiber concrete, and magnetically adsorbing the steel fibers by the magnetized steel bars to ensure that part of the steel fibers are adsorbed around the inserted steel bars to form a wolf tooth bar shape taking the magnetized steel bars as the center and the steel fibers are adhered around the magnetized steel bars.
In particular, the method further comprises the steps of:
the strong magnetic field environment is one of a magnetic attaching space, a field and a magnetizing device for realizing the magnetization of the steel bars.
In particular, the method further comprises the steps of:
the inserted steel bars are not less than two groups, and the inserted steel bars are distributed regularly in a symmetrical mode.
The invention has the beneficial effects that: the invention provides a method for enhancing bonding between reinforcing steel bars and concrete based on a steel fiber magnetic absorption principle, wherein steel fiber concrete is poured into a reserved joint gap before an assembled building component is assembled, because the steel fibers and the reinforcing steel bars are all made of ferromagnetic materials, the magnetic absorption principle of the steel fibers is utilized, a high-intensity magnetic field is used for enabling an inserted reinforcing steel bar of a component to be inserted to have temporary magnetism, after the reinforcing steel bars are inserted into the joints, the steel fibers in the steel fiber concrete can be adsorbed around the reinforcing steel bars to form a wolf tooth bar shape which takes the inserted reinforcing steel bars as a center and enables the steel fibers to be attached to the periphery, and after the concrete is solidified to reach strength, the inserted reinforcing steel bars in the joints can form very reliable bonding with the concrete.
The present invention will be described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of the basic structure of the present invention.
FIG. 2 is a schematic view of the structure of the present invention inserted with steel bar to magnetize and pour steel fiber concrete.
Fig. 3 is a schematic view of the structure of the invention after insertion and assembly.
Fig. 4 is a perspective view of the node after insertion assembly of the present invention.
Detailed Description
Example 1:
the following description is given by way of example only, and not by way of limitation, of the possible embodiments of the present invention.
Referring to fig. 1 to 4, a first preferred embodiment of the present invention is disclosed, in which the inserted steel bars of the members to be inserted are temporarily magnetized during the assembly process of the prefabricated building, and the steel fibers are attracted around the steel bars by using the magnetic attraction principle of the steel fibers to form a "wolf tooth bar" shape in which the steel fibers are attached around the inserted steel bars, so that the steel bars and the concrete in the prefabricated building node form a reliable bond, thereby improving the tensile strength and integrity of the prefabricated building node.
The specific design scheme of this example is as follows:
a method for enhancing the bonding between a reinforcing steel bar and concrete based on a steel fiber magnetic attraction principle comprises the following steps:
(1) setting an assembly type building component 4 and a building component 1 to be inserted, wherein a reserved node gap 3 is set on the assembly type building component 4, and an inserted steel bar 2 is set on the building component 1 to be inserted;
(2) setting concrete and steel fibers, and mixing and stirring the concrete 9 and the steel fibers 6 uniformly to generate steel fiber concrete 7;
(3) pouring the steel fiber concrete 7 into the node gap 3, and magnetizing the inserted steel bar 2 in a strong magnetic field environment to generate a magnetized steel bar 5;
(4) the building element 1 to be inserted is inserted into the assembly, i.e. the magnetized steel bars 5 which are provided with temporary magnetism are inserted into the node gaps 3 which are filled with the steel fiber concrete 7.
The applicant states that a new method, which is generated by combining some steps of the above-mentioned embodiment with the technical solution of the summary part of the invention based on the above-mentioned embodiment, is also one of the description scope of the present invention, and other embodiments of these steps are not listed in the present application for the sake of brevity.
In the above embodiment, the magnetic attraction of the magnetized steel bar to the steel fiber causes part of the steel fiber to be attracted around the inserted steel bar, forming a "mace" shape 8 in which the steel fiber is attached around the magnetized steel bar as a center. The strong magnetic field environment is one of a magnetic attaching space, a field and a magnetizing device for realizing the magnetization of the steel bars. Two sets ofly are no less than to inserted reinforcing bar 2, just inserted reinforcing bar 2 symmetrical formula regular distribution.
The technical principle is as follows: the steel fiber and the steel bar are all made of ferromagnetic materials, in the process of assembling the fabricated building in a cast-in-place connection mode, firstly, steel fiber concrete (mixture of common concrete and the steel fiber) is poured into a reserved joint gap, then, the inserted steel bar of a component to be inserted is magnetized by a strong magnetic field to temporarily obtain magnetism, and in the process of inserting the steel bar into the reserved joint gap, because the steel bar obtains the temporary magnetism, the steel fiber can be adsorbed around the steel bar, so that the inserted steel bar obtains a shape 8 similar to a wolf tooth bar, and after the concrete of the joint is solidified to reach strength, the steel bar and the concrete form very reliable bonding. In this way, the tensile strength of the node and the integrity of the fabricated building structure are greatly enhanced.
The applicant further states that the present invention is described in the above embodiments to explain the implementation method and device structure of the present invention, but the present invention is not limited to the above embodiments, i.e. it is not meant to imply that the present invention must rely on the above methods and structures to implement the present invention. It should be understood by those skilled in the art that any modifications to the present invention, the addition of equivalent alternatives to the embodiments of the present invention and steps, the selection of specific modes, etc., are within the scope of the present invention and the disclosure.
The present invention is not limited to the above embodiments, and all embodiments adopting the similar structure and method to achieve the object of the present invention are within the protection scope of the present invention.
Claims (3)
1. The method for enhancing the bonding between the steel bar and the concrete based on the steel fiber magnetic attraction principle is characterized by comprising the following steps:
(1) setting an assembly type building component and a building component to be inserted, wherein a reserved node gap is set on the assembly type building component, and an inserted steel bar is set on the building component to be inserted;
(2) setting concrete and steel fibers, and mixing and stirring the concrete and the steel fibers uniformly to generate steel fiber concrete;
(3) pouring the steel fiber concrete into the joint gaps, and magnetizing the steel bars to be inserted in a strong magnetic field environment to generate magnetized steel bars;
(4) inserting the building component to be inserted into the assembly, namely inserting the magnetized steel bars with temporary magnetism into the joint gaps filled with the steel fiber concrete; the magnetized steel bars magnetically adsorb the steel fibers, so that part of the steel fibers are adsorbed around the magnetized steel bars to form a wolf tooth bar shape with the inserted steel bars as the center and the steel fibers attached around the steel bars.
2. The method for enhancing the adhesion between the steel bar and the concrete based on the magnetic attraction principle of the steel fiber as claimed in claim 1, further comprising the steps of:
the strong magnetic field environment is one of a magnetic attaching space, a field and a magnetizing device for realizing the magnetization of the steel bars.
3. The method for enhancing the adhesion between the steel bar and the concrete based on the magnetic attraction principle of the steel fiber as claimed in claim 1, further comprising the following steps:
the inserted steel bars are not less than two groups, and the inserted steel bars are distributed regularly in a symmetrical mode.
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| CN201810955120.5A CN108978882B (en) | 2018-08-21 | 2018-08-21 | Method for enhancing bonding between reinforcing steel bar and concrete based on steel fiber magnetic attraction principle |
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| CN201810955120.5A CN108978882B (en) | 2018-08-21 | 2018-08-21 | Method for enhancing bonding between reinforcing steel bar and concrete based on steel fiber magnetic attraction principle |
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| CN108978882B true CN108978882B (en) | 2020-02-07 |
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| CN109704807A (en) * | 2019-01-23 | 2019-05-03 | 南京理工大学 | A method of steel fibre distribution arrangement in steel fiber reinforced concrete is controlled by magnetic field |
| CN114319871B (en) * | 2021-12-09 | 2022-11-04 | 浙江大学 | Surface treatment method for concrete containing ferromagnetic aggregate |
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| JP3759665B2 (en) * | 1997-06-26 | 2006-03-29 | 新日本製鐵株式会社 | Corner joints between reinforcing bars or steel reinforced concrete structures and various columnar structures and joining methods thereof |
| CN101913189B (en) * | 2010-07-23 | 2011-11-30 | 河北工业大学 | Method for preparing unidirectional distributive steel fiber reinforced mortar and special equipment thereof |
| CN104931364B (en) * | 2015-06-04 | 2017-07-21 | 浙江大学 | Reinforced concrete structure method for testing fatigue and device based on piezomagnetism |
| CN204772987U (en) * | 2015-06-30 | 2015-11-18 | 中国建筑第八工程局有限公司 | Location binding apparatus of prefab reinforcing bar net piece |
| CN106223478A (en) * | 2016-08-31 | 2016-12-14 | 初明进 | A kind of precast reinforced concrete structure method of attachment |
| CN206554527U (en) * | 2017-01-23 | 2017-10-13 | 中国建筑科学研究院 | A kind of vertical structure concrete curing film fixed structure |
| CN108301568B (en) * | 2018-01-31 | 2019-07-26 | 合肥建工集团有限公司 | A kind of assembling structure of assembly concrete component |
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