Reinforcing method and structure for steel beam and concrete beam

Abstract

The invention relates to the technical field of beam reinforcing, and discloses a reinforcing method and structure for a steel beam and a concrete beam The method comprises the steps that a U-shaped steel beam is arranged below an existing frame beam, the beam bottom is connected through a beam bottom connecting plate and an anchor bolt, a steel plate pressing strip is arranged on the side face to be connected with a shear nail, and a U-shaped hoop plate is arranged between the steel plate pressing strip and the shear nail for bridging and enhancing lateral constraint; and finally, the ends of the U-shaped steel beams are connected with the embedded parts on the frame columns through the connecting plates. By means of the mode of combining U-shaped steel beam wrapping, mechanical connection and structural adhesive filling, tight and cooperative stress of a reinforcing component and an existing beam is achieved, and the problems that interface connection is unstable and force transmission is discontinuous in traditional reinforcing are solved.

Description

Technical Field

[0001] This invention relates to the field of beam reinforcement technology, and more specifically, to a reinforcement method and structure for steel beams and concrete beams. Background Technology

[0002] In existing buildings and structures, frame beams, as the main load-bearing components, often require reinforcement due to changes in function, increased loads, structural modifications such as openings, material performance degradation due to long-term service, or localized damage. Various engineering approaches exist for reinforcing existing frame beams, including concrete and steel beams, such as increasing cross-sections, encasing them in steel profiles, bonding steel plates or fiber composite materials, and installing external support members to improve load-bearing capacity or deformation performance.

[0003] However, existing technologies still face several common challenges in practical engineering applications: the connection and coordinated stress distribution between the reinforced components and the existing beams are difficult to achieve stably. Specifically, when the existing beam and the added component form a composite stress system, interface gaps often arise due to construction errors, component processing deviations, and uneven surfaces of the existing beam. Furthermore, the complex surface condition of the existing beam, with shear force as the primary stress transfer at the interface, makes it prone to relative slippage or local detachment at the connection points, hindering the formation of a reliable integrated working state between the added component and the existing beam. In this situation, even if the strength and stiffness of the added component meet design requirements, discontinuous interface connections or uneven force transmission may affect the stability and consistency of the reinforcement effect, increasing the risk of future maintenance. Summary of the Invention

[0004] In view of this, the present invention proposes a reinforcement method and structure for steel beams and concrete beams, aiming to solve the problem that the interface connection between the external reinforcement component and the existing frame beam is difficult to stabilize during the reinforcement process of existing frame beams, thus making it difficult to form a reliable cooperative force.

[0005] In one aspect, the present invention provides a structure for steel beams and concrete beams, comprising: Existing frame beams, existing frame columns adjacent to the ends of the existing frame beams, U-shaped steel beams located below the existing frame beams, beam bottom connecting plates, steel plate strips, U-shaped hoops, anchor bolts, structural adhesive, shear studs, connecting plates, and embedded parts located on the existing frame columns; The U-shaped steel beam is arranged along the length of the existing frame beam, and the U-shaped steel beam is provided with a load-bearing connection part and a lateral covering part located on both sides of the U-shaped steel beam; The bottom beam connecting plate is disposed between the load-bearing connection part and the bottom of the existing frame beam, and the bottom beam connecting plate is connected to the existing frame beam by the anchor bolts; The steel plate strips are respectively installed on both sides of the existing frame beam and connected to the existing frame beam through the shear studs; The U-shaped hoop is disposed between the steel plate pressure strip and the existing frame beam, and the two sides of the U-shaped hoop are respectively connected to the steel plate pressure strip and the existing frame beam; The structural adhesive is disposed between the bottom connecting plate of the beam and the bottom of the existing frame beam, and is also disposed between the steel plate strip and the side of the existing frame beam and is cured. The connecting plate is disposed at the end of the U-shaped steel beam and connected to the embedded part; The existing frame beams are marked with beam top elevation markers.

[0006] Furthermore, the existing frame beams are concrete beams or steel beams.

[0007] Furthermore, the anchor bolts include chemical anchor bolts and / or bolted connections and / or welded connections.

[0008] Furthermore, the bottom connecting plate of the beam is a plate extending along the length direction of the existing frame beam, and is provided with through holes for the anchor bolts to pass through.

[0009] Furthermore, the steel plate pressure strip can be set as several strips, and is located on both sides of the existing frame beam respectively. The U-shaped hoop is made of several pieces and is set at different intervals along the length of the existing frame beam.

[0010] Furthermore, the connecting plate and the embedded part are connected by bolts or welding.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting a U-shaped steel beam with a load-bearing connection part and lateral covering parts on both sides along the beam length below the existing frame beam, the reinforcing members obtain clear arrangement and positioning benchmarks at the bottom and sides of the beam; by setting a beam bottom connecting plate between the load-bearing connection part and the bottom of the existing frame beam and connecting it to the existing frame beam with anchor bolts, a clear mechanical connection relationship is formed in the bottom direction of the beam; by setting steel plate strips on both sides of the existing frame beam and connecting them to the existing frame beam with shear studs, distributed connection points are formed in the lateral direction; and further, by setting U-shaped hoops between the steel plate strips and the existing frame beam and distributing them on both sides... The steel plate strip is not connected to the existing frame beam, forming a bridging lateral connection, which makes it easier to keep the relative positions of the lateral components consistent. At the same time, structural adhesive is applied and cured between the bottom connecting plate of the beam and the bottom of the existing frame beam, as well as between the steel plate strip and the side of the existing frame beam, to fill the interface gaps and make the contact state between the bottom interface of the beam and the lateral interface more continuous. In addition, the ends of the U-shaped steel beam are connected to the embedded parts on the existing frame column through the connecting plate to form a clear end connection node. The beam top elevation mark on the existing frame beam provides a unified height benchmark for overall installation positioning, which helps to improve the consistency and controllability of assembly positioning.

[0012] On the other hand, this application also provides a reinforcement method for steel beams and concrete beams, for achieving the above-mentioned structure for steel beams and concrete beams, including: S1: Install and position the beam according to the existing beam top elevation markings on the frame beam; S2: Install a bottom connection plate at the bottom of the existing frame beam and connect the bottom connection plate to the existing frame beam with anchor bolts; S3: Install U-shaped clamps, placing them between the steel plate strip and the existing frame beam, and connecting the U-shaped clamps to the steel plate strip and the existing frame beam; S4: Steel plate strips are installed on both sides of the existing frame beams, and the steel plate strips and U-shaped hoops are connected to the existing frame beams by shear studs; S5: Install the U-shaped steel beam under the existing frame beam and position it. The load-bearing connection part is located under the bottom connection plate of the beam, and the lateral covering part is located on both sides of the U-shaped steel beam. S6: Apply and cure structural adhesive between the bottom connecting plate of the beam and the bottom of the existing frame beam, and between the steel plate strip and the side of the existing frame beam; S7: A connecting plate is installed at the end of the U-shaped steel beam, and the connecting plate is connected to the embedded parts on the existing frame column.

[0013] Furthermore, before step S2 and / or before step S3, mounting holes corresponding to the anchor bolts are opened on the existing frame beam.

[0014] Further, step S6 includes setting an injection port and an vent at the corresponding positions of the structural adhesive, and applying the structural adhesive through the injection port.

[0015] Furthermore, before or during step S4, shear studs are placed on the U-shaped hoop plate.

[0016] It is understandable that the above-mentioned reinforcement method and structure for steel beams and concrete beams have the same beneficial effects, and will not be elaborated further here. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A structural front view for steel beams and concrete beams provided in an embodiment of the present invention; Figure 2 A structural side view for steel beams and concrete beams provided in an embodiment of the present invention; Figure 3 This is a flowchart illustrating a reinforcement method for steel beams and concrete beams, provided as an embodiment of the present invention.

[0018] Among them, 1. Existing frame beams; 2. Existing frame columns; 3. Anchor bolts; 4. U-shaped hoops; 5. Steel plate strips; 6. Embedded parts; 7. Connecting plates; 8. U-shaped steel beams; 81. Lateral covering parts; 82. Load-bearing connection parts; 9. Shear studs; 10. Beam top elevation markings; 11. Beam bottom connecting plates; 12. Structural adhesive. Detailed Implementation

[0019] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] See Figure 1-2 As shown, this application proposes a structure for steel beams and concrete beams, comprising: Existing frame beam 1, existing frame column 2 adjacent to the end of existing frame beam 1, U-shaped steel beam 8 set below existing frame beam 1, beam bottom connecting plate 11, steel plate pressure strip 5, U-shaped hoop plate 4, anchor bolt 3, structural adhesive 12, shear nail 9, connecting plate 7 and embedded parts 6 set on existing frame column 2. The U-shaped steel beam 8 is arranged along the length of the existing frame beam 1. The U-shaped steel beam 8 is provided with a load-bearing connection part 82 and a lateral covering part 81 located on both sides of the U-shaped steel beam 8. The bottom beam connecting plate 11 is disposed between the load-bearing connection part 82 and the bottom of the existing frame beam 1, and the bottom beam connecting plate 11 is connected to the existing frame beam 1 by anchor bolts 3; Steel plate strips 5 are respectively installed on both sides of the existing frame beam 1 and connected to the existing frame beam 1 by shear studs 9; U-shaped hoop 4 is set between the steel plate pressure strip 5 and the existing frame beam 1, and the two sides of the U-shaped hoop 4 are respectively connected to the steel plate pressure strip 5 and the existing frame beam 1; Structural adhesive 12 is applied between the bottom connecting plate 11 and the bottom of the existing frame beam 1, and is also applied between the steel plate strip 5 and the side of the existing frame beam 1 and cured. The connecting plate 7 is set at the end of the U-shaped steel beam 8 and connected to the embedded part 6; An elevation marker 10 is set on the top of the existing frame beam 1.

[0021] Specifically, the present invention includes an existing frame beam 1, an existing frame column 2 adjacent to the end of the existing frame beam 1, and a U-shaped steel beam 8 disposed below the existing frame beam 1. The U-shaped steel beam 8 is disposed along the length direction of the existing frame beam 1, and has a load-bearing connection portion 82 and lateral covering portions 81 located on both sides of the U-shaped steel beam 8.

[0022] The load-bearing connection part 82 is arranged in the bottom area of ​​the existing frame beam 1, and the lateral covering part 81 is arranged on both sides of the existing frame beam 1, so that the U-shaped steel beam 8 forms a relative constraint relationship with the existing frame beam 1 in terms of upper, lower and lateral aspects after installation, which facilitates the positioning and installation of subsequent components and forms a clear force transmission path.

[0023] A beam bottom connection plate 11 is installed between the bottom of the U-shaped steel beam 8 and the bottom of the existing frame beam 1. The beam bottom connection plate 11 is arranged between the load-bearing connection part 82 and the bottom of the existing frame beam 1, and is connected to the existing frame beam 1 by anchor bolts 3. Through the above arrangement, the beam bottom connection plate 11 and the anchor bolts 3 form a connection interface in the beam bottom direction, so that the U-shaped steel beam 8 and the existing frame beam 1 form a controllable connection relationship at the bottom of the beam, and provide a relatively closed interface space for the application of structural adhesive 12, reducing the impact of the beam bottom joint gap on the connection stability.

[0024] Steel plate strips 5 are installed on both sides of the existing frame beam 1, and the steel plate strips 5 are connected to the existing frame beam 1 by shear studs 9. This arrangement creates lateral connection points on the sides of the existing frame beam 1. The steel plate strips 5 can serve as load-bearing components and mounting bases for lateral connections. Together with the U-shaped hoop 4 (described later), they define the position of the lateral interface and reduce relative offset during the installation of lateral components.

[0025] U-shaped clamps 4 are installed between the steel plate strip 5 and the existing frame beam 1, with both sides of the U-shaped clamps 4 connected to the steel plate strip 5 and the existing frame beam 1 respectively. By bridging the steel plate strip 5 and the existing frame beam 1 with the U-shaped clamps 4, a continuous or segmented lateral connection relationship can be formed on the side of the existing frame beam 1, so that the lateral members have distributed constraint points in the length direction, thereby forming a connection system with the bottom connection plate 11 that cooperates with each other vertically and laterally.

[0026] Structural adhesive 12 is applied between the bottom connecting plate 11 and the bottom of the existing frame beam 1, and between the steel plate strip 5 and the side of the existing frame beam 1, forming an adhesive layer after curing. The structural adhesive 12 fills the joint gaps at the bottom and sides of the beam, making the relevant contact interfaces more continuous, thus stabilizing the contact between the bottom connecting plate 11, the steel plate strip 5, and the existing frame beam 1. Simultaneously, the structural adhesive 12 works in conjunction with the anchor bolts 3 and shear studs 9, facilitating the establishment of a more continuous force transmission path between the existing frame beam 1 and the U-shaped steel beam 8, reducing uneven stress caused by localized gaps at the interface.

[0027] A connecting plate 7 is installed at the end of the U-shaped steel beam 8, and an embedded part 6 is installed on the existing frame column 2. The connecting plate 7 is connected to the embedded part 6. This end connection method forms a clear connection node between the end of the U-shaped steel beam 8 and the existing frame column 2, which facilitates the installation and positioning of the end within the existing frame system and provides connection conditions for the force transfer between the U-shaped steel beam 8 and the existing frame structure. In addition, a beam top elevation mark 10 is installed on the existing frame beam 1. The beam top elevation marker 10 provides a unified height benchmark for installation positioning, facilitating the verification of the relative positions of the beam bottom connecting plate 11, steel plate pressure strip 5, U-shaped hoop 4, and U-shaped steel beam 8. This improves the consistency and repeatability of on-site assembly and reduces secondary adjustments caused by positioning deviations. Therefore, this embodiment sets mechanical connection elements, including the beam bottom connecting plate 4, anchor bolts 7, steel plate pressure strip 5, U-shaped hoop 6, and shear nails 9, on both the beam bottom interface and the lateral interface, along with the interface filling material structural adhesive 8. This ensures that the connection between the external reinforcement component U-shaped steel beam 3 and the existing frame beam 1 no longer relies on a single interface or a single connection point. This reduces the risk of discontinuous interface connections caused by interface gaps, uneven surfaces, or local installation deviations, thereby addressing the technical problems of unstable interface connections and difficulty in forming coordinated stress between the external reinforcement component and the existing frame beam 1.

[0028] In some embodiments of this application, the existing frame beam 1 is a concrete beam or a steel beam.

[0029] Specifically, in the case where the existing frame beam 1 is a concrete beam, surface contact interfaces are formed between the bottom connecting plate 11 and the bottom of the existing frame beam 1, and between the steel plate strip 5 and the side of the existing frame beam 1. Anchor bolts 3 are used to reliably connect the bottom connecting plate 11 and the existing frame beam 1, and shear studs 9 are used to connect the steel plate strip 5 and the existing frame beam 1. Structural adhesive 12 is applied to the above interfaces and cured to form an adhesive layer, so that the bottom interface and the side interface maintain a relatively continuous bonding state after installation. Since the surface of concrete beams usually has local unevenness or small gaps, the impact of interface gaps on the connection state can be reduced by filling and curing the structural adhesive 12, and the fit between the anchor bolts 3, shear studs 9 and the interface adhesive layer can be made more stable.

[0030] When the existing frame beam 1 is a steel beam, the bottom connecting plate 11 and the bottom of the steel beam, as well as the steel plate strip 5 and the side of the steel beam, form corresponding connection interfaces. In this case, the anchor bolt 3 and shear stud 9 are still connected to the existing frame beam 1, but the specific implementation method can be selected according to the connection conditions of the steel beam. For example, bolted or welded connectors can be used to connect the bottom connecting plate 11 to the steel beam, and bolted or welded connectors can be used to connect the steel plate strip 5 to the steel beam. Structural adhesive 12 can still be applied to the bottom and side interfaces and cured to form an adhesive layer, so that the bottom and side interfaces form a more continuous bond after connection, reducing the impact of local gaps on installation accuracy and stress consistency. By limiting the existing frame beam 1 to either a concrete beam or a steel beam and explaining the adaptation methods with connecting components such as anchor bolts 7 and shear studs 9, this application can still establish a connection relationship between the bottom and side interfaces corresponding to the U-shaped steel beam 3 under different substrate material conditions, avoiding interface connection instability caused by mismatched connection forms due to differences in substrate materials.

[0031] It should be noted that the above-mentioned concrete beam and steel beam are only optional types of existing frame beam 1, and neither type changes the overall composition of the structure of this application or the relative arrangement of the components; under different types of existing frame beam 1, installation can be completed by only adjusting the specific connection method of anchor bolt 3 and shear nail 9.

[0032] In some embodiments of this application, the anchor 3 includes a chemical anchor 3 and / or a bolted connection and / or a welded connection.

[0033] Specifically, in the case where the existing frame beam 1 is a concrete beam, the anchor bolt 3 can be a chemical anchor bolt 3. The chemical anchor bolt 3 can be installed by pre-forming an installation hole in the bottom of the existing frame beam 1, injecting anchoring agent into the installation hole, and inserting the anchor rod body, so that the anchor rod body forms an anchoring bond with the existing frame beam 1; the bottom connecting plate 11 of the beam is provided with a through hole corresponding to the installation hole, and the chemical anchor bolt 3 passes through the through hole and cooperates with the bottom connecting plate 11 of the beam to realize the connection between the bottom connecting plate 11 of the beam and the existing frame beam 1.

[0034] In cases where the existing frame beam 1 is a steel beam, the anchor bolts 3 can be bolted or welded. When using bolted connections, bolt holes can be formed at corresponding positions on the steel beam, and corresponding through holes can be provided on the bottom connecting plate 11. Bolts are then inserted and tightened to connect the bottom connecting plate 11 to the steel beam. When using welded connections, the bottom connecting plate 11 can be welded to the corresponding parts of the steel beam to form a connection between them. For cases where the existing frame beam 1 is a steel beam and site conditions permit, bolted and welded connections can also be used in combination to meet the needs of different installation spaces or construction organizations.

[0035] It should be noted that the specific type of anchor bolt 3 can be selected or combined according to the material of the existing frame beam 1, the on-site operability conditions, and the structural form of the connection position, and is not limited to a single form; when using different types of anchor bolt 3, it is only necessary to ensure that the anchor bolt 3 matches the through hole of the bottom connecting plate 11 of the beam and forms a connection.

[0036] The selection and combination of the above-mentioned anchor bolt types 7 enable the bottom connection plate 4 of the beam and the existing frame beam 1 to form an feasible connection path based on the base material and site conditions, reducing the situation of insufficient connection points or unreliable connection due to the limitation of connection methods, thereby improving the controllability of the connection at the bottom interface of the beam.

[0037] In some embodiments of this application, the bottom beam connecting plate 11 is a plate extending along the length of the existing frame beam 1 and is provided with through holes for anchor bolts 3 to pass through.

[0038] Specifically, the beam bottom connecting plate 11 is a plate extending along the length of the existing frame beam 1, with its length matching the length of the existing frame beam 1, so as to form a continuous or segmented connection interface at the bottom of the existing frame beam 1. The beam bottom connecting plate 11 can be arranged between the load-bearing connection part 82 of the U-shaped steel beam 8 and the bottom of the existing frame beam 1, so that the beam bottom connecting plate 11 is positioned opposite to the bottom of the existing frame beam 1 in the installed state and is arranged adjacent to the load-bearing connection part 82.

[0039] The bottom connecting plate 11 of the beam is provided with through holes for anchor bolts 3 to pass through, and the through holes are distributed along the length direction of the bottom connecting plate 11. The position of the through holes corresponds to the preset installation holes or connection positions on the existing frame beam 1, so that the anchor bolts 3 can pass through the through holes and connect with the existing frame beam 1, thereby fixing the bottom connecting plate 11 to the bottom of the existing frame beam 1. With the above configuration, the bottom connecting plate 11 can be aligned and assembled with the anchor bolts 3 through the through holes during installation, which is convenient for positioning and fastening on site according to the established benchmark. In some embodiments, there can be multiple through holes, which can be evenly or non-uniformly arranged along the length direction of the bottom connecting plate 11 as needed to adapt to different lengths of existing frame beams 1, end connection structures, and on-site installation conditions.

[0040] The thickness, width, and shape of the through hole of the bottom connecting plate 11 can be designed according to the connection requirements. The through hole can be a round hole or an oblong hole. When the through hole is set as an oblong hole, it can provide a certain adjustment margin for installation alignment to accommodate the hole position deviation or installation error of the existing frame beam 1.

[0041] It should be noted that the beam bottom connecting plate 11 is a plate extending along the length direction and its through hole arrangement is only used to define the assembly structure relationship between the beam bottom connecting plate 11 and the anchor bolt 3. Without departing from the definition of the claims, the beam bottom connecting plate 11 can also be configured to be composed of multiple plate segments spliced ​​together, and the plate segments are arranged continuously in the length direction to meet the installation requirements of different spans or different construction sections.

[0042] The bottom connecting plate 4 extends along the length direction and is provided with through holes, so that the anchor bolts 7 can form distributed connection points in the length direction, and the alignment of the through holes helps to control the installation deviation; therefore, it can reduce the local connection discontinuity caused by hole position deviation and component offset, and solve the problem of unstable interface connection between the existing frame beam 1 and the external component U-shaped steel beam 3 from the bottom interface level.

[0043] In some embodiments of this application, the steel plate pressure strip 5 can be set as several strips, and is located on both sides of the existing frame beam 1 respectively. The U-shaped hoop plate 4 is a number of pieces and is set at different intervals along the length direction of the existing frame beam 1.

[0044] Specifically, the steel plate strips 5 can be configured as several strips, respectively arranged on both sides of the existing frame beam 1. Each side of the steel plate strip 5 can be a single strip extending along the length direction, or multiple strips arranged in segments along the length direction of the existing frame beam 1. When segmented arrangement is adopted, gaps can be reserved between adjacent steel plate strips 5 to avoid existing structures, installation holes or on-site obstacles, and to facilitate the application and curing of structural adhesive 12. The arrangement of the steel plate strips 5 on both sides can correspond to the lateral covering part 81 of the U-shaped steel beam 8, thereby forming an alignable component system at the lateral interface, which facilitates the subsequent bridging installation of the U-shaped hoop plate 4.

[0045] The steel plate strips 5 are connected to the existing frame beams 1 via shear studs 9. To accommodate different beam lengths, end structures, and lateral construction conditions, multiple connection points can be set on the steel plate strips 5 along their length, creating a distributed connection between the steel plate strips 5 and the existing frame beams 1 on the sides. The number, length, and segmentation of the steel plate strips 5 can be adjusted according to the structural form of the existing frame beams 1 and the available installation space, but they all maintain the structural relationship of being located on both sides of the existing frame beams 1 and connecting with them.

[0046] In the same embodiment, several U-shaped hoops 4 are provided, and they are arranged at different intervals along the length of the existing frame beam 1. The term "different intervals" means that the spacing between adjacent U-shaped hoops 4 can vary according to the connection requirements at different locations. For example, in the end areas near the existing frame column 2, connecting plate 7, or embedded part 6, the U-shaped hoops 4 can be arranged relatively densely; in areas with relatively regular beam spans or side structures, the U-shaped hoops 4 can be arranged relatively sparsely. By arranging the U-shaped hoops 4 at different intervals along the length, the placement of the U-shaped hoops 4 can be matched with the segmental boundaries of the steel plate strip 5, the placement of the shear studs 9, and the available on-site operating space, thereby facilitating overall assembly and fastening.

[0047] U-shaped clamps 4 are disposed between the steel plate pressure strip 5 and the existing frame beam 1, with both sides of the U-shaped clamps 4 connected to the steel plate pressure strip 5 and the existing frame beam 1, respectively. Thus, the U-shaped clamps 4 form bridging members at the lateral interface, establishing connections between the steel plate pressure strip 5 and the existing frame beam 1 at multiple locations. When the steel plate pressure strip 5 is segmented, the U-shaped clamps 4 can be arranged near the ends or in the middle of the segments to achieve connection and constraint of different segments of the steel plate pressure strip 5. It should be noted that the specific number, segmentation form, and spacing along the length of the steel plate pressure strip 5 and U-shaped clamps 4 can be determined based on the length of the existing frame beam 1, the end connection structure, and construction organization conditions, and can be selected and combined without departing from the limitations of the claims.

[0048] The steel plate pressure strips 5 are arranged in sections or multiple strips, and the U-shaped hoop plates 6 are set at multiple points with different intervals, so that the lateral interface connection points can be arranged along the length of the existing frame beam 1 and the arrangement density can be adjusted at the ends or key areas. This reduces the lack of connection points or inconsistent connections caused by the complex local structure and limited construction space of the lateral interface, and enhances the continuity and consistency of the lateral interface connection.

[0049] In some embodiments of this application, the connecting plate 7 and the embedded part 6 are connected by bolts or welding.

[0050] Specifically, the connecting plate 7 is located at the end of the U-shaped steel beam 8, and the embedded part 6 is located on the existing frame column 2. The connecting plate 7 and the embedded part 6 are connected by bolts or welding, thus forming an end connection between the end of the U-shaped steel beam 8 and the existing frame column 2. In the embodiment using bolt connection, the connecting plate 7 and the embedded part 6 are respectively provided with corresponding connection holes. During installation, after the connecting plate 7 and the embedded part 6 are aligned and fitted, bolts are passed through the connection holes and tightened to fix the connecting plate 7 and the embedded part 6.

[0051] Bolted connections facilitate on-site assembly, disassembly, and maintenance, and can be designed to match the existing embedded part 6 hole positions of the frame column 2. In embodiments using welded connections, after the connecting plate 7 and the embedded part 6 are fitted and aligned, they are connected and fixed by a weld. The welding connection method allows for selection of the welding position and weld type based on the structural form of the connecting plate 7 and the embedded part 6, creating a continuous connection interface between them at the end areas. For cases where the embedded part 6 of the existing frame column 2 is a steel component and welding is feasible, a welded connection method is preferred.

[0052] In some embodiments, bolted connections and welded connections can also be used in combination. For example, temporary positioning and initial fixing can be achieved first with bolts, and then the connecting plate 7 and the embedded part 6 can be welded and fixed. Alternatively, bolted connections and welded connections can be used in different areas of the connecting plate 7 and the embedded part 6 to adapt to different installation spaces and structural conditions. It should be noted that the connection method between the connecting plate 7 and the embedded part 6 can be selected based on the existing structural form of the embedded part 6 of the frame column 2, the on-site operability conditions, and the construction organization requirements, and is not limited to a single connection method.

[0053] The end is clearly connected to the embedded part 11 on the existing frame column 2 through the connecting plate 10, so that the boundary conditions of the end of the U-shaped steel beam 3 are clear. This is conducive to controlling the influence of the relative displacement and installation deviation of the end on the connection state of the middle interface, thereby reducing the interface connection fluctuation caused by the unclear end constraint, which corresponds to the problem that the interface connection is difficult to stabilize and the cooperative force is not easy to form.

[0054] In another preferred embodiment based on the above embodiments, see [reference] Figure 3 As shown, this embodiment provides a method for strengthening steel beams and concrete beams, including: S1: Install and position the beam according to the existing beam top elevation markings on the frame beam; S2: Install a bottom connection plate at the bottom of the existing frame beam and connect the bottom connection plate to the existing frame beam with anchor bolts; S3: Install U-shaped clamps, placing them between the steel plate strip and the existing frame beam, and connecting the U-shaped clamps to the steel plate strip and the existing frame beam; S4: Steel plate strips are installed on both sides of the existing frame beams, and the steel plate strips and U-shaped hoops are connected to the existing frame beams by shear studs; S5: Install the U-shaped steel beam under the existing frame beam and position it. The load-bearing connection part is located under the bottom connection plate of the beam, and the lateral covering part is located on both sides of the U-shaped steel beam. S6: Apply and cure structural adhesive between the bottom connecting plate of the beam and the bottom of the existing frame beam, and between the steel plate strip and the side of the existing frame beam; S7: Install a connecting plate at the end of the U-shaped steel beam and connect the connecting plate to the embedded parts on the existing frame column.

[0055] Specifically, in step S1, the installation positioning is performed based on the beam top elevation markings on the existing frame beams. During construction, the beam top elevation markings serve as a unified height benchmark to verify the relative positions of the existing frame beams and columns. Installation position lines for the beam bottom connecting plates, steel plate strips, U-shaped hoops, and U-shaped steel beams are then determined on the bottom and sides of the existing frame beams, forming the positioning benchmark for subsequent assembly. This step ensures that all components are aligned under the same benchmark, reducing relative deviations during component installation.

[0056] In step S2, a bottom connection plate is installed at the bottom of the existing frame beam, and anchor bolts are used to connect the bottom connection plate to the existing frame beam. Specifically, the bottom connection plate is first placed against a predetermined position at the bottom of the existing frame beam, ensuring the through holes on the bottom connection plate correspond to the anchoring positions of the existing frame beam. Then, anchor bolts are installed, passing through the through holes in the bottom connection plate and connecting to the existing frame beam to complete the fixing of the bottom connection plate. For existing frame beams that are concrete beams, chemical anchor bolts can be used; for existing frame beams that are steel beams, bolted connectors and / or welded connectors can be used. After this step, the bottom connection plate forms a clearly defined mounting base at the bottom of the beam.

[0057] In step S3, U-shaped hoops are installed, positioned between the steel plate strip and the existing frame beam, and connected to both the steel plate strip and the existing frame beam. Specifically, the U-shaped hoops are first placed at a predetermined position on the side of the existing frame beam, positioned between the subsequent installation position of the steel plate strip and the side of the existing frame beam, with the connecting parts of the U-shaped hoops facing the corresponding connection points of the steel plate strip and the existing frame beam, to facilitate subsequent connection with both. In cases where multiple U-shaped hoops are installed along the length, they can be arranged at predetermined intervals and kept aligned.

[0058] In step S4, steel plate strips are installed on both sides of the existing frame beam, and the steel plate strips and U-shaped hoops are connected to the existing frame beam using shear studs. Specifically, steel plate strips are installed on both sides of the existing frame beam, covering or aligning the corresponding connection areas of the U-shaped hoops. Shear studs are then installed, passing through the steel plate strips and connecting to the existing frame beam, while simultaneously connecting and fixing the U-shaped hoops to the steel plate strips and the existing frame beam. If the steel plate strips are segmented, they can be aligned and connected to the corresponding U-shaped hoops at each segment.

[0059] In step S5, the U-shaped steel beam is installed and positioned below the existing frame beam, with the load-bearing connection located below the bottom connecting plate and the lateral covering parts located on both sides of the U-shaped steel beam. Specifically, the U-shaped steel beam is hoisted or moved below the existing frame beam along its length, ensuring that the load-bearing connection of the U-shaped steel beam is aligned with the bottom connecting plate and that the lateral covering parts of the U-shaped steel beam correspond to the areas on both sides of the existing frame beam. Subsequently, the position of the U-shaped steel beam is adjusted so that its relative position to the bottom connecting plate, steel plate strip, and U-shaped hoop meets the predetermined installation requirements, and the positioning and fixing are completed.

[0060] In step S6, structural adhesive is applied and cured between the beam bottom connecting plate and the bottom of the existing frame beam, and between the steel plate strip and the side of the existing frame beam. Specifically, structural adhesive is applied at the joints corresponding to the bottom and side interfaces of the beam. The structural adhesive can be applied by coating or pouring into the gaps between the beam bottom connecting plate and the bottom of the existing frame beam, and between the steel plate strip and the side of the existing frame beam. After application, it is cured to form a cured adhesive layer at the corresponding interfaces.

[0061] In step S7, a connecting plate is installed at the end of the U-shaped steel beam, and the connecting plate is connected to the embedded part on the existing frame column. In specific implementation, the connecting plate is set at a predetermined position at the end of the U-shaped steel beam, and the connecting plate is aligned with the embedded part on the existing frame column; then, the connecting plate and the embedded part are connected and fixed by bolt connection or welding connection, thereby completing the connection between the end of the U-shaped steel beam and the existing frame column.

[0062] The above steps are organized in the order of positioning, interface mechanical connection, interface filling and curing, and end connection, so that the bottom and side interfaces of the beam gradually form a verifiable and solidifiable connection state during the assembly process. This reduces the connection instability caused by interface gaps and assembly deviations from the construction process level, and thus solves the problem of difficulty in forming cooperative stress.

[0063] In some embodiments of this application, before step S2 and / or before step S3, mounting holes corresponding to anchor bolts are opened on the existing frame beam.

[0064] Specifically, in one implementation, before performing step S2, mounting holes corresponding to the anchor bolts are first opened at the bottom of the existing frame beam. In practice, the bottom of the existing frame beam can be laid out and positioned according to the arrangement of the through holes on the bottom connecting plate, forming mounting holes at corresponding positions. This allows the anchor bolts to pass through the through holes in the bottom connecting plate and enter the mounting holes, thereby achieving the connection between the bottom connecting plate and the existing frame beam. For existing frame beams that are concrete beams, the mounting holes can be anchoring holes for chemical anchor bolts; for existing frame beams that are steel beams, the mounting holes can be through holes or threaded holes for bolted connections, or positioning holes for welded connections.

[0065] In another implementation, before performing step S3, mounting holes corresponding to the anchor bolts are first drilled on the side of the existing frame beam. These side mounting holes correspond to the connection positions of the lateral members, allowing the anchor bolts to pass through the corresponding members and connect with the existing frame beam after installation. Specifically, the side of the existing frame beam can be laid out and positioned according to the installation position lines of the lateral members, forming mounting holes at the corresponding positions so that the anchor bolts can be subsequently assembled onto the side of the existing frame beam.

[0066] In a further embodiment, the bottom mounting hole and the side mounting hole can also be provided simultaneously. That is, the bottom mounting hole is opened before step S2 and the side mounting hole is opened before step S3, so as to correspond to the connection position between the bottom connecting plate and the existing frame beam and the connection position between the side member and the existing frame beam, respectively.

[0067] It should be noted that the hole type, hole depth, and processing method of the mounting hole can be determined according to the material of the existing frame beam and the specific connection form of the anchor bolt; the forming method of the mounting hole may include drilling, drilling, or other processing methods that meet the assembly requirements.

[0068] By pre-forming installation holes corresponding to the anchor bolts before S2 and / or S3, the anchor bolts and the through holes / connection positions of the components can be accurately aligned, reducing unreliable connections or missing connection points caused by on-site hole position deviations, thereby improving the certainty of interface connection formation and solving the problem of unstable interface connections.

[0069] In some embodiments of this application, step S6 includes setting an injection port and an vent at the corresponding position of the structural adhesive, and applying the structural adhesive through the injection port.

[0070] Specifically, in one embodiment, the injection port and the vent are located in the interface area between the bottom connecting plate of the beam and the bottom of the existing frame beam. In practice, an injection port can be formed at a predetermined position on the bottom connecting plate, and an vent can be formed at another position connected to the injection port along the interface, connecting the injection port and the vent to the gap space where the structural adhesive is to be applied. The structural adhesive enters the gap space through the injection port, and air or volatile gases within the gap can be discharged through the vent, thereby completing the application of the structural adhesive to the bottom interface of the beam.

[0071] In another embodiment, the injection port and the vent are located in the interface area between the steel plate strip and the side of the existing frame beam. Specifically, the injection port can be provided on the steel plate strip or an adjacent component, and the vent can be provided at another location that communicates with the injection port along the lateral interface, so that the injection port and the vent are connected to the gap space between the steel plate strip and the side of the existing frame beam.

[0072] Structural adhesive enters the gap space through the injection port, and air in the gap is discharged through the vent port to complete the setting of the lateral interface structural adhesive.

[0073] In a further embodiment, the injection ports and vents at the bottom and side interfaces of the beam can be set separately. That is, one set of injection ports and vents can be set at the bottom interface, and another set at the side interface, respectively for applying the structural adhesive to the corresponding interfaces. Alternatively, injection ports and vents can be set at only one interface, while the structural adhesive is applied to the other interface by coating, thus adapting to different construction space conditions. In specific operation, the positions of the injection ports and vents can be determined based on the direction of the interface gap, the component layout, and the available space on site, ensuring that the structural adhesive can enter through the injection port and spread along the interface, and that the vents can connect to the gas discharge path within the interface. After the structural adhesive is applied, the injection ports and vents can be sealed or left open before the adhesive cures. The sealing method can be depending on the component type, using sealing components, sealing adhesive, or other sealing measures.

[0074] The inclusion of an injection port and an vent makes the process of structural adhesive entering the interface gap more controllable. The vent provides a channel for gas to escape, which helps to reduce local voids caused by trapped air in the interface, thereby improving the continuity and consistency of the adhesive layer formation. This, in turn, addresses the problems of discontinuous interface connections and unstable force transmission paths.

[0075] In some embodiments of this application, shear studs are placed on the U-shaped hoop plate before or during step S4.

[0076] Specifically, the U-shaped hoop is installed between the steel plate strip and the existing frame beam. The installation of the U-shaped hoop in step S3 can be a temporary installation, that is, the U-shaped hoop is placed at a predetermined position on the side of the existing frame beam for positioning, hole alignment or verification; after the alignment is confirmed, the U-shaped hoop can be removed from the side of the existing frame beam to facilitate the subsequent assembly of components, and then the U-shaped hoop is returned to its original position between the steel plate strip and the existing frame beam.

[0077] Before or during step S4, shear studs are installed on the U-shaped hoop. Before step S4, the shear studs are pre-installed in predetermined positions on the U-shaped hoop, ensuring alignment with the steel plate strip and existing frame beams after repositioning. During step S4, after the steel plate strip is in place and aligned with the U-shaped hoop, the shear studs connect the steel plate strip, U-shaped hoop, and existing frame beams, forming a fixed connection. Thus, in the final assembled state, the shear studs are used to achieve the common connection between the steel plate strip, U-shaped hoop, and existing frame beams.

[0078] By placing shear studs on the U-shaped hoop and finally connecting the steel plate strip, the U-shaped hoop, and the existing frame beam in S4, the lateral interface forms a consistent assembly and fixing relationship under the same connection action, reducing the relative deviation introduced by multiple assembly, and correspondingly alleviating the problem of unstable interface connection from the perspective of lateral connection implementation.

[0079] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program goods. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program goods embodied on one or more computer-usable storage media containing computer-usable program code, including but not limited to disk storage, CD-ROM, optical storage, etc.

[0080] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus systems, and computer program goods according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, executed by the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0081] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0082] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions that, when performed on the computer or other programmable apparatus, provide for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A structure for steel beams and concrete beams, characterized in that, include: Existing frame beams, existing frame columns adjacent to the ends of the existing frame beams, U-shaped steel beams located below the existing frame beams, beam bottom connecting plates, steel plate strips, U-shaped hoops, anchor bolts, structural adhesive, shear studs, connecting plates, and embedded parts located on the existing frame columns; The U-shaped steel beam is arranged along the length of the existing frame beam, and the U-shaped steel beam is provided with a load-bearing connection part and a lateral covering part located on both sides of the U-shaped steel beam; The bottom beam connecting plate is disposed between the load-bearing connection part and the bottom of the existing frame beam, and the bottom beam connecting plate is connected to the existing frame beam by the anchor bolts; The steel plate strips are respectively installed on both sides of the existing frame beam and connected to the existing frame beam through the shear studs; The U-shaped hoop is disposed between the steel plate pressure strip and the existing frame beam, and the two sides of the U-shaped hoop are respectively connected to the steel plate pressure strip and the existing frame beam; The structural adhesive is disposed between the bottom connecting plate of the beam and the bottom of the existing frame beam, and is also disposed between the steel plate strip and the side of the existing frame beam and is cured. The connecting plate is disposed at the end of the U-shaped steel beam and connected to the embedded part; The existing frame beams are marked with beam top elevation.

2. The structure for steel beams and concrete beams according to claim 1, characterized in that, The existing frame beams are either concrete beams or steel beams.

3. The structure for steel beams and concrete beams according to claim 2, characterized in that, The anchors include chemical anchors and / or bolted connections and / or welded connections.

4. The structure for steel beams and concrete beams according to claim 3, characterized in that, The bottom connecting plate of the beam is a plate extending along the length of the existing frame beam and is provided with through holes for the anchor bolts to pass through.

5. The structure for steel beams and concrete beams according to claim 4, characterized in that, The steel plate pressure strip can be set as several strips, and is located on both sides of the existing frame beam respectively. The U-shaped hoop is a number of pieces and is set at different intervals along the length of the existing frame beam.

6. The structure for steel beams and concrete beams according to claim 5, characterized in that, The connecting plate and the embedded part are connected by bolts or welding.

7. A method for strengthening steel beams and concrete beams, used to achieve the structure for steel beams and concrete beams as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Install and position the beam according to the existing beam top elevation markings on the frame beam; S2: Install a bottom connection plate at the bottom of the existing frame beam and connect the bottom connection plate to the existing frame beam with anchor bolts; S3: Install U-shaped clamps, placing them between the steel plate strip and the existing frame beam, and connecting the U-shaped clamps to the steel plate strip and the existing frame beam; S4: Steel plate strips are installed on both sides of the existing frame beams, and the steel plate strips and U-shaped hoops are connected to the existing frame beams by shear studs; S5: Install the U-shaped steel beam under the existing frame beam and position it. The load-bearing connection part is located under the bottom connection plate of the beam, and the lateral covering part is located on both sides of the U-shaped steel beam. S6: Apply and cure structural adhesive between the bottom connecting plate of the beam and the bottom of the existing frame beam, and between the steel plate strip and the side of the existing frame beam; S7: A connecting plate is installed at the end of the U-shaped steel beam, and the connecting plate is connected to the embedded parts on the existing frame column.

8. The reinforcement method for steel beams and concrete beams according to claim 7, characterized in that, Before step S2 and / or before step S3, install holes corresponding to the anchor bolts are made on the existing frame beam.

9. The reinforcement method for steel beams and concrete beams according to claim 8, characterized in that, Step S6 includes setting an injection port and an vent at the corresponding positions of the structural adhesive, and applying the structural adhesive through the injection port.

10. The method for strengthening steel beams and concrete beams according to claim 7, characterized in that, Before or during step S4, shear studs are placed on the U-shaped hoop plate.

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