CN-122014011-A - Reinforcing method and structure for steel beam and concrete beam

CN122014011ACN 122014011 ACN122014011 ACN 122014011ACN-122014011-A

Abstract

The invention relates to the technical field of beam body reinforcement, and discloses a reinforcement method and structure for steel beams and concrete beams, wherein the method comprises the following steps: the U-shaped steel beam is arranged below the existing frame beam, the beam bottom is connected with the anchor bolts through a beam bottom connecting plate, the side face is provided with a steel plate pressing strip connected with the shear nails, a U-shaped hoop plate is arranged between the steel plate pressing strip and the shear nails to bridge and strengthen lateral constraint, structural adhesive is filled in the beam bottom and lateral interfaces to be solidified, and finally the end part of the U-shaped steel beam is connected with an embedded part on the frame column through the connecting plate. The invention realizes the tight cooperative stress of the reinforcing member and the existing beam by combining the cladding of the U-shaped steel beam, the mechanical connection and the filling of the structural adhesive, and solves the problems of unstable interface connection and discontinuous force transmission in the traditional reinforcement.

Inventors

Tan Nongchao
HUANG YIN
REN KAI

Assignees

艾奕康设计与咨询(深圳)有限公司

Dates

Publication Date: 20260512
Application Date: 20260130

Claims (10)

1. A structure for steel beams and concrete beams, comprising: The frame comprises an existing frame beam, an existing frame column adjacent to the end part of the existing frame beam, a U-shaped steel beam arranged below the existing frame beam, a beam bottom connecting plate, a steel plate pressing strip, a U-shaped hoop plate, an anchor bolt, structural adhesive, a shear pin, a connecting plate and a buried piece arranged on the existing frame column; the U-shaped steel beam is arranged along the length direction of the existing frame beam, and is provided with a bearing connecting part and lateral cladding parts positioned at two sides of the U-shaped steel beam; the beam bottom connecting plate is arranged between the bearing connecting part and the beam bottom of the existing frame beam, and is connected with the existing frame beam through the anchor bolts; the steel plate pressing strips are respectively arranged on the side surfaces of the two sides of the existing frame beam and are connected with the existing frame beam through the shear nails; the U-shaped hoop plate is arranged between the steel plate pressing strip and the existing frame beam, and two sides of the U-shaped hoop plate are respectively connected with the steel plate pressing strip and the existing frame beam; the structural adhesive is arranged between the beam bottom connecting plate and the beam bottom of the existing frame beam, and is also arranged between the steel plate pressing strip and the side surface of the existing frame beam and is solidified; the connecting plate is arranged at the end part of the U-shaped steel beam and is connected with the embedded part; And Liang Dingbiao high marks are arranged on the existing frame beams.
2. The structure for steel and concrete beams according to claim 1, wherein the existing frame beam is a concrete beam or a steel beam.
3. A structure for steel and concrete beams according to claim 2, characterised in that said anchors comprise chemical anchors and/or bolted and/or welded connections.
4. A structure for steel beams and concrete beams as claimed in claim 3, wherein said beam bottom connecting plate is a plate member extending in a longitudinal direction of said existing frame beam, and is provided with a through hole through which said anchor bolt is passed.
5. The structure for steel beams and concrete beams according to claim 4, wherein the steel plate pressing bars are provided in a plurality of pieces and are respectively located on both side surfaces of the existing frame beam, and the U-shaped hoop plates are provided in a plurality of pieces and are arranged at different intervals along the length direction of the existing frame beam.
6. The structure for steel beams and concrete beams according to claim 5, wherein the connection plates are connected with the embedded parts by means of bolt connection or welding connection.
7. A method for reinforcing steel and concrete beams for realizing a structure for steel and concrete beams according to any one of claims 1 to 6, comprising the steps of: S1, mounting and positioning according to Liang Dingbiao high marks on the existing frame beams; s2, arranging a beam bottom connecting plate at the beam bottom of the existing frame beam, and connecting the beam bottom connecting plate with the existing frame beam through an anchor bolt; S3, installing a U-shaped hoop plate, enabling the U-shaped hoop plate to be arranged between the steel plate pressing strip and the existing frame beam, and enabling the U-shaped hoop plate to be connected with the steel plate pressing strip and the existing frame beam; S4, arranging steel plate battens on the side surfaces of two sides of the existing frame beam, and connecting the steel plate battens and the U-shaped hoop plates with the existing frame beam through shear nails; S5, installing and positioning the U-shaped steel beam below the existing frame beam, wherein the bearing connecting part is positioned below the beam bottom connecting plate, and the lateral cladding parts are positioned at two sides of the U-shaped steel beam; s6, structural adhesive is arranged between the beam bottom connecting plate and the beam bottom of the existing frame beam and between the steel plate pressing strip and the side surface of the existing frame beam and is solidified; And S7, arranging a connecting plate at the end part of the U-shaped steel beam, and connecting the connecting plate with embedded parts on the existing frame columns.
8. The reinforcement method for steel beams and concrete beams according to claim 7, wherein mounting holes corresponding to the anchors are opened in the existing frame beam before step S2 and/or before step S3.
9. The method for reinforcing steel beams and concrete beams according to claim 8, wherein step S6 includes providing a filling port and an exhaust port at corresponding positions of the structural adhesive, and providing the structural adhesive through the filling port.
10. The method of claim 7, wherein shear pins are provided on the U-shaped hoop plates before or during step S4.

Description

Reinforcing method and structure for steel beam and concrete beam Technical Field The invention relates to the technical field of beam body reinforcement, in particular to a reinforcement method and structure for steel beams and concrete beams. Background In the existing buildings and structures, the frame beams are used as main stress members, and reinforcement treatment is required for the beam members due to material performance attenuation or local damage and the like caused by use function change, load improvement, structural transformation hole opening, long-term service and the like. For reinforcement of existing frame beams including concrete beams and steel beams, various engineering methods exist, such as increasing the bearing capacity or improving the deformation performance by increasing the section, wrapping steel, pasting steel plates or fiber composite materials, arranging additional supporting members and the like. However, the prior art still has the outstanding common problem in practical engineering application that the connection and the cooperative stress between the reinforcing member and the existing beam are difficult to realize stably. The method is characterized in that when the existing beam and the externally-added member form a composite stress system, construction errors, member machining deviation, interface gaps caused by uneven surface of the existing beam and other factors often exist between the existing beam and the externally-added member, meanwhile, the surface state of the existing beam is complex, the interface stress is mainly transmitted by shearing force, and relative sliding or local disconnection is easy to occur at the connecting position, so that the externally-added member is difficult to form a reliable integral working state with the existing beam. In this case, even if the strength and rigidity of the additional member meet the design requirements, the stability and consistency of the reinforcing effect may be affected due to the discontinuity of the interface connection or the uneven force transmission of the interface, increasing the risk of post-maintenance. Disclosure of Invention In view of the above, the invention provides a reinforcing method and a structure for steel beams and concrete beams, which aim to solve the problems that the interface connection between an external reinforcing member and an existing frame beam is difficult to stabilize and thus reliable collaborative stress is difficult to form in the reinforcing process of the existing frame beam. In one aspect, the present invention provides a structure for steel and concrete beams, comprising: The frame comprises an existing frame beam, an existing frame column adjacent to the end part of the existing frame beam, a U-shaped steel beam arranged below the existing frame beam, a beam bottom connecting plate, a steel plate pressing strip, a U-shaped hoop plate, an anchor bolt, structural adhesive, a shear pin, a connecting plate and a buried piece arranged on the existing frame column; the U-shaped steel beam is arranged along the length direction of the existing frame beam, and is provided with a bearing connecting part and lateral cladding parts positioned at two sides of the U-shaped steel beam; the beam bottom connecting plate is arranged between the bearing connecting part and the beam bottom of the existing frame beam, and is connected with the existing frame beam through the anchor bolts; the steel plate pressing strips are respectively arranged on the side surfaces of the two sides of the existing frame beam and are connected with the existing frame beam through the shear nails; the U-shaped hoop plate is arranged between the steel plate pressing strip and the existing frame beam, and two sides of the U-shaped hoop plate are respectively connected with the steel plate pressing strip and the existing frame beam; the structural adhesive is arranged between the beam bottom connecting plate and the beam bottom of the existing frame beam, and is also arranged between the steel plate pressing strip and the side surface of the existing frame beam and is solidified; the connecting plate is arranged at the end part of the U-shaped steel beam and is connected with the embedded part; And Liang Dingbiao high marks are arranged on the existing frame beams. Further, the existing frame beam is a concrete beam or a steel beam. Further, the anchor bolt comprises a chemical anchor bolt and/or a bolted connection and/or a welded connection. Further, the beam bottom connecting plate is a plate extending along the length direction of the existing frame beam, and is provided with a through hole for the anchor bolt to penetrate. Further, the steel plate pressing strips can be arranged into a plurality of strips and are respectively positioned on the side surfaces of two sides of the existing frame beam, and the U-shaped hoop plates are arranged into a plurality of pieces and are arranged at different inter