Building reinforcing structure and method

Abstract

The invention relates to a building reinforcing structure and method, and relates to the field of building structure reinforcing, the building reinforcing structure comprises a reinforcing assembly and a bearing structure, and the reinforcing assembly comprises a beam body surrounding reinforcing piece used for surrounding a building beam body and a top connecting piece; the beam body surrounds the reinforcing piece and is connected with the top connecting piece through a fastening piece, pre-tightening force is applied to the beam body, the upper portion of the bearing structure is fixed to a floor of a building, the end of the bearing structure is rigidly connected to the reinforcing assembly, and the bearing structure is used for being rigidly connected with a cantilever steel beam. According to the technical scheme, through the reinforcing assembly and the bearing structure, the pre-tightening force is applied around the building beam body, digging is avoided, damage to an original structure and the construction vibration risk are effectively reduced, and the beneficial effects that damage to the original building structure is reduced, the construction risk is reduced, and the structural reliability is improved are achieved.

Description

Technical Field

[0001] This invention relates to the field of building structure reinforcement, and specifically to a building reinforcement structure and method. Background Technology

[0002] Many of my country's existing residential and office buildings were constructed in the 1980s and 1990s. With economic and social development and changes in functional needs, many buildings require the addition of cantilevered balconies or platforms to meet modern usage requirements. These cantilevered structures typically have large spans, posing a significant challenge to the load-bearing capacity of the original building beams and overall frame.

[0003] In related technologies, such renovations are generally carried out by excavating and reinforcing the original load-bearing components such as walls, beams and columns of the building, and then connecting them to the new structure through wet concrete work.

[0004] This process not only severely damages the overall stiffness and continuity of the original structure, leading to localized weakening of structural strength, but also the high-frequency vibrations generated during the excavation process can easily cause the expansion of microcracks in existing components, concrete spalling, and stress concentration in reinforcing bars, posing a significant threat to the safety and long-term stability of old buildings. Summary of the Invention

[0005] This application provides a building reinforcement structure and method that can reduce damage to the original building structure, reduce construction risks, and improve structural reliability.

[0006] In a first aspect, embodiments of this application provide a building reinforcement structure, including: The reinforcement assembly includes a beam-encircling reinforcement member for surrounding a building beam and a top connector, the beam-encircling reinforcement member and the top connector being connected by fasteners and subjected to preload; and... A load-bearing structure, the upper part of which is fixed to the floor slab of the building, and the ends of which are rigidly connected to the reinforcing components, the load-bearing structure being used for rigid connection of cantilevered steel beams.

[0007] In conjunction with the first aspect, in one embodiment, the beam-encircling reinforcement includes a U-shaped hoop plate, and the top connector includes a beam-top flat steel.

[0008] In conjunction with the first aspect, in one embodiment, one end of the U-shaped hoop is used to extend above the building beam to connect with the end of the top flat steel of the beam.

[0009] In conjunction with the first aspect, in one embodiment, the fastener includes: The first pair of tie rods vertically penetrates the building beam and the U-shaped hoop, and both ends are fixed to the U-shaped hoop with nuts; and The second pair of tie rods penetrates vertically through the floor slab of the building, and its two ends are fixed to the load-bearing structure and the top flat steel of the beam respectively by nuts.

[0010] In conjunction with the first aspect, in one embodiment, the building reinforcement structure further includes a reinforcing plate for padding between the base plate of the U-shaped hoop and the bottom of the building beam.

[0011] In conjunction with the first aspect, in one embodiment, through holes are provided on the U-shaped hoop and the top flat steel of the beam at positions corresponding to the tie rods.

[0012] In conjunction with the first aspect, in one embodiment, the load-bearing structure is a newly added steel secondary beam, the end of which is rigidly connected to the side plate of the U-shaped hoop plate.

[0013] In conjunction with the first aspect, in one embodiment, the upper part of the newly added steel secondary beam is anchored to the building floor slab by anchor bolts; and / or, The end of the newly added steel secondary beam is fixedly connected to the side plate of the U-shaped hoop plate by welding.

[0014] Secondly, this application provides a building reinforcement method applied to the aforementioned building reinforcement structure, the building reinforcement method comprising the following steps: The beam-encircling reinforcement and the top connector are installed on the building beam using fasteners and preload is applied. The upper part of the load-bearing structure is fixed to the floor slab, and its ends are rigidly connected to the reinforcement components. The cantilevered steel beam is rigidly connected to the load-bearing structure.

[0015] In conjunction with the second aspect, in one embodiment, the step prior to installing the beam-encircling reinforcement and the top connector onto the building beam using fasteners and applying preload includes: The protective layer at the bottom of the building beams is peeled off and roughened. A reinforcing plate is placed between the bottom of the building beam and the beam's surrounding reinforcement.

[0016] The beneficial effects of the technical solutions provided in this application include: In this embodiment, the building reinforcement structure includes a reinforcement component and a load-bearing structure. The reinforcement component includes a beam-encircling reinforcement member and a top connector for encircling the building beam. The beam-encircling reinforcement member and the top connector are connected by fasteners and subjected to pre-tension. The upper part of the load-bearing structure is fixed to the building's floor slab, and its ends are rigidly connected to the reinforcement component. The load-bearing structure is used for the rigid connection of cantilevered steel beams. By using the reinforcement component and load-bearing structure, applying pre-tension around the building beam, and avoiding excavation, damage to the original structure and the risk of construction vibration are effectively reduced. This has the advantages of reducing damage to the original building structure, lowering construction risks, and improving structural reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an embodiment of the building reinforcement structure provided by the present invention. Figure 2 This is a schematic flowchart of an embodiment of the building reinforcement method provided by the present invention.

[0019] In the diagram: 1. Reinforcing component; 11. Beam surround reinforcement; 12. Top connector; 13. Fastener; 131. First tie rod; 132. Second tie rod; 2. Load-bearing structure; 21. Newly added secondary steel beam; 22. Anchor bolt; 3. Reinforcing plate; 100. Building beam; 200. Floor slab; 300. Cantilever steel beam. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0021] Many of my country's existing residential and office buildings were constructed in the 1980s and 1990s. With economic and social development and changes in functional needs, many buildings require the addition of cantilevered balconies or platforms to meet modern usage requirements. These cantilevered structures typically have large spans, posing a significant challenge to the load-bearing capacity of the original building beams and overall frame.

[0022] In related technologies, such renovations are generally carried out by excavating and reinforcing the original load-bearing components such as walls, beams and columns of the building, and then connecting them to the new structure through wet concrete work.

[0023] This process not only severely damages the overall stiffness and continuity of the original structure, leading to localized weakening of structural strength, but also the high-frequency vibrations generated during the excavation process can easily cause the expansion of microcracks in existing components, concrete spalling, and stress concentration in reinforcing bars, posing a significant threat to the safety and long-term stability of old buildings.

[0024] To address the aforementioned problems, this invention proposes a building reinforcement structure and method that can reduce damage to the original building structure, lower construction risks, and improve structural reliability.

[0025] Please refer to Figure 1 This invention proposes a building reinforcement structure, including a reinforcement component 1 and a load-bearing structure 2; the reinforcement component 1 includes a beam-encircling reinforcement member 11 for encircling a building beam 100 and a top connector 12, the beam-encircling reinforcement member 11 and the top connector 12 are connected by fasteners 13 and are subjected to pre-tightening force; the upper part of the load-bearing structure 2 is fixed to the floor slab 200 of the building, and its end is rigidly connected to the reinforcement component 1, the load-bearing structure 2 is used for rigid connection of cantilever steel beams 300.

[0026] In this embodiment, the building reinforcement structure includes a reinforcement component 1 and a load-bearing structure 2. The reinforcement component 1 includes a beam-encircling reinforcement member 11 and a top connector 12 for encircling the building beam 100. The beam-encircling reinforcement member 11 and the top connector 12 are connected by fasteners 13 and are subjected to pre-tightening force. The upper part of the load-bearing structure 2 is fixed to the floor slab 200 of the building, and its ends are rigidly connected to the reinforcement component 1. The load-bearing structure 2 is used for rigid connection of the cantilever steel beam 300. By using the reinforcement component 1 and the load-bearing structure 2, applying pre-tightening force around the building beam 100 and avoiding chiseling, damage to the original structure and construction vibration risks are effectively reduced. This has the advantages of reducing damage to the original building structure, reducing construction risks, and improving structural reliability.

[0027] The building reinforcement structure includes a reinforcement component 1, which comprises a beam-encircling reinforcement member 11 and a top connector 12 for encircling the building beam 100. The beam-encircling reinforcement member 11 can be implemented in various forms; for example, it can be formed by bolting or welding multiple steel plates to create a closed or semi-closed frame encircling the building beam 100; or, it can be a prefabricated polygonal steel frame whose dimensions match the cross-section of the building beam 100, achieving a tight fit through adjustment or filling. The top connector 12 can mate with the beam-encircling reinforcement member 11; for example, it can be a simple connecting plate connected to the end of the beam-encircling reinforcement member 11 by bolting or welding; or, it can be angle steel or channel steel, with its flanges or webs connected to corresponding parts of the beam-encircling reinforcement member 11.

[0028] The beam-encircling reinforcement 11 and the top connector 12 are connected by fasteners 13 and preloaded. The fasteners 13 can be implemented in various ways, including but not limited to: using a combination of ordinary bolts and nuts, achieving the connection by tightening the nuts; or using riveting to fix the components through riveting deformation; or directly connecting the beam-encircling reinforcement 11 and the top connector 12 by welding. The preload can be applied in various ways, for example, by using a torque wrench to precisely tighten the bolts to achieve the designed preload; or, in special cases, by using hydraulic tensioning equipment to pre-tension the connector to ensure a tight connection.

[0029] In addition, the building reinforcement structure also includes a load-bearing structure 2, the upper part of which is fixed to the building's floor slab 200. The load-bearing structure 2 can take various forms; for example, it can be a newly added steel beam; or it can be a steel column or a short concrete column, the height of which is adapted to the distance from the floor slab 200 to the reinforcement component 1. The upper part of the load-bearing structure 2 can be fixed to the building's floor slab 200 by means of expansion bolts to fix the upper end plate or connector of the load-bearing structure 2 to the surface of the floor slab 200; or, the load-bearing structure 2 can be anchored to the concrete of the floor slab 200 by means of chemical anchors 22; or, connectors can be pre-embedded during the construction of the floor slab 200, and the load-bearing structure 2 can be connected to the pre-embedded parts by bolts or welding.

[0030] Thus, through the effective circumference and pre-tightening force applied to the building beam 100 by the reinforcing component 1, and the rigid connection between the load-bearing structure 2 and the reinforcing component 1 and the floor slab 200, the building reinforcement structure of this embodiment can safely and efficiently transfer the load of the newly added cantilever steel beam 300 to the original building structure, avoiding large-scale excavation and damage to the original beams and columns, while providing reliable load-bearing support.

[0031] In other embodiments, this application proposes a building reinforcement structure comprising a beam-encircling reinforcement member 11 and a top connector 12 for encircling a building beam 100, wherein the beam-encircling reinforcement member 11 and the top connector 12 are connected by fasteners 13 and subjected to preload; and a load-bearing structure 2, the upper part of which is fixed to the building floor slab 200, and the ends of which are rigidly connected to the reinforcement member 1, the load-bearing structure 2 being used for rigid connection of cantilever steel beams 300. However, in practical applications, the structural forms of the beam-encircling reinforcement member 11 and the top connector 12 are diverse, and improper selection may lead to complex installation, uneven stress, or unsatisfactory reinforcement effect.

[0032] In this regard, this application further proposes that in the above-mentioned building reinforcement structure, the beam-encircling reinforcement member 11 includes a U-shaped hoop plate, and the top connector 12 includes a beam-top flat steel.

[0033] The U-shaped hoop is a plate material with a U-shaped cross-section, usually made of high-strength metal. Its main function is to tightly wrap around the bottom and sides of the building beam 100, providing constraint and support for the beam. The U-shaped hoop can be composed of a U-shaped steel plate formed by integral stamping, or multiple steel plates connected by welding or bolting to form a U-shaped structure, or a cast U-shaped component. The beam top flat steel is a flat steel material with a rectangular cross-section and high tensile and compressive strength. It serves as the top connector 12, used to connect with the U-shaped hoop and transfer the preload to the building beam 100, while also providing a connection point for the load-bearing structure 2. The beam top flat steel can be a single flat steel bar, multiple flat steel bars used side by side or stacked, or a custom flat steel bar with pre-drilled holes or connectors.

[0034] The solution of this application provides a clear and efficient component form for building reinforcement structure by specifying the beam-encircling reinforcement member 11 as a U-shaped hoop and the top connector 12 as a beam-top flat steel. The U-shaped hoop, with its unique U-shaped structure, can tightly encircle the bottom and sides of the building beam 100, forming a stable clamping effect and effectively restraining the deformation of the beam. The beam-top flat steel, as the top connector 12, with its flat and robust characteristics, can easily span the top of the building beam 100 and connect to the end of the U-shaped hoop. This specific structural combination allows the preload applied by the fastener 13 to be uniformly and effectively transmitted to the building beam 100, ensuring a reliable integral connection between the reinforcement component 1 and the building beam 100.

[0035] In one specific implementation, the U-shaped hoop can be made of steel plate with a thickness of not less than 16mm through cold bending or welding. The width and depth of its U-shaped opening can be customized according to the specific dimensions of the building beam 100 to ensure a tight fit. The thickness of the flat steel at the top of the beam is the same as that of the U-shaped hoop.

[0036] Furthermore, in this embodiment, one end of the U-shaped hoop is used to extend above the building beam 100 to connect with the end of the top flat steel of the beam.

[0037] Specifically, one end of the U-shaped hoop extends above the building beam 100. This means that when the U-shaped hoop encircles the building beam 100, part of its structure extends upwards, beyond the top plane of the building beam 100. This extension design allows the U-shaped hoop to connect with the top flat steel bar located above the building beam 100, thus forming a complete encircling and connection path. For example, one side plate of the U-shaped hoop can be designed to be high enough that its upper part can extend above the top of the building beam 100 after encircling it. Furthermore, the extended portion of the U-shaped hoop connects to the end of the top flat steel bar. This connection ensures a closed force transmission path between the U-shaped hoop and the top flat steel bar, allowing the preload applied by the fastener 13 to effectively act on the building beam 100, achieving a reinforcement effect. The U-shaped hoop extending to one side of the building beam 100 can be fixed to the end of the top flat steel of the beam by mechanical connection methods such as bolts and rivets; or, the U-shaped hoop extending to one side of the building beam 100 can be connected to the end of the top flat steel of the beam by welding to form a rigid connection.

[0038] The proposed solution involves a U-shaped hoop surrounding the building beam 100, with one end extending upwards above the beam 100, while a flat steel bar is positioned at the top of the beam 100. This extension of the U-shaped hoop allows it to connect with the flat steel bar at the same or similar height as the beam's lower and side sections. This connection method allows the fastener 13 to penetrate vertically or nearly vertically through the extended portion of the U-shaped hoop and the flat steel bar, forming a complete load-bearing loop around the building beam 100 when preload is applied. The preload is applied through the fastener 13 to the U-shaped hoop and the flat steel bar, tightly securing the building beam 100, effectively suppressing beam deformation and improving its load-bearing capacity and shear resistance. This extended connection avoids complex connections on the beam's side, simplifies construction, and ensures that the preload is evenly and effectively transmitted to the beam, thus working in conjunction with other parts of the reinforcement component 1 to effectively reinforce the building beam 100.

[0039] In some embodiments, the fastener 13 includes a first pair of tie rods 131 and a second pair of tie rods 132. The first pair of tie rods 131 vertically penetrates the building beam 100 and the U-shaped hoop, with both ends fixed to the U-shaped hoop by nuts; the second pair of tie rods 132 vertically penetrates the building floor slab 200, with both ends fixed to the load-bearing structure 2 and the beam top flat steel by nuts, respectively.

[0040] The first tie rod 131 is a member used to bear tensile force. Its main function is to tightly connect the U-shaped hoop to the building beam 100 and apply preload by tightening the nuts. This tie rod can be made of high-strength threaded steel bars, high-strength bolts, or special prestressed tie rods, and its material and dimensions can be determined according to actual engineering requirements and stress analysis. The first tie rod 131 vertically penetrates the building beam 100 and the U-shaped hoop. This arrangement ensures that the force is directly transmitted in the vertical direction, effectively resisting shear and bending stresses, and providing a direct path for applying preload. During implementation, holes can be pre-drilled or reserved in the building beam 100 and the U-shaped hoop for the tie rod to pass through. The two ends of the first tie rod 131 are fixed to the U-shaped hoop with nuts, which allows the tie rod to be effectively tightened, thereby applying preload to the U-shaped hoop and the building beam 100.

[0041] The second tie rod 132, similar to the first tie rod 131, is also a member used to bear tensile forces. Its main function is to tightly connect the load-bearing structure 2 to the building's floor slab 200 and apply preload by tightening the nut. This tie rod can be made of high-strength threaded steel bars, chemical anchors 22, or expansion bolts, and its material and dimensions can be determined according to project requirements. The second tie rod 132 vertically penetrates the building's floor slab 200. This arrangement directly transfers the force of the beam top flat steel to the floor slab 200 structure, ensuring a firm connection between the reinforcement component 1 and the floor slab 200. During implementation, holes can be drilled or pre-drilled in the floor slab 200 for the tie rod to pass through.

[0042] The solution of this application addresses the aforementioned technical problems by introducing specific fasteners 13, namely, a first pair of tie rods 131 and a second pair of tie rods 132. Specifically, the first pair of tie rods 131 is designed to vertically penetrate the building beam 100 and the U-shaped hoop, and is fixed to the U-shaped hoop by nuts at both ends. This structure allows the first pair of tie rods 131 to apply a vertical preload to the U-shaped hoop and the building beam 100 when the nuts are tightened, thereby firmly clamping the U-shaped hoop to the bottom and sides of the building beam 100, effectively preventing relative slippage or separation between the U-shaped hoop and the building beam 100. Simultaneously, the second pair of tie rods 132 vertically penetrates the building floor slab 200 and is fixed to the beam top flat steel by nuts at both ends. This allows the beam top flat steel to be tightly anchored to the floor slab 200 and applies a preload to both the beam top flat steel and the floor slab 200, ensuring the stability of the top connection. Through the combined action of the first tie rod 131 and the second tie rod 132, the entire reinforcement assembly 1 forms a rigidly connected whole. This preload not only enhances the shear and tensile strength of the connection, but also improves the overall stiffness between the reinforcement assembly 1 and the existing building structure, thereby enabling more reliable transmission of the load borne by the load-bearing structure 2 and effectively suppressing the deformation of the structure under load.

[0043] In some embodiments of this application, the building reinforcement structure surrounds the building beam 100 with U-shaped hoops and top flat steel, and applies preload using the first tie rod 131 and the second tie rod 132 to reinforce the building beam 100. However, when the bottom plate of the U-shaped hoops is in direct contact with the bottom of the building beam 100, unevenness or local defects on the surface of the building beam 100 can easily lead to uneven stress distribution after applying preload, and may even cause local crushing of the building beam 100, thereby affecting the effective transmission of preload and the stability of the reinforcement effect.

[0044] In this regard, this application further proposes that the building reinforcement structure also includes a reinforcing plate 3 for padding between the bottom plate of the U-shaped hoop and the bottom of the building beam 100.

[0045] The solution of this application involves placing a reinforcing plate 3 between the bottom plate of the U-shaped hoop and the bottom of the building beam 100, so that the preload applied by the U-shaped hoop no longer acts directly on the uneven surface of the building beam 100. When the first tie rod 131 is tightened and a preload is applied to the U-shaped hoop, the bottom plate of the U-shaped hoop transmits the pressure to the reinforcing plate 3 placed underneath it. The reinforcing plate 3 can be made of steel plate, which, due to its flatness and rigidity, can effectively diffuse and redistribute the local high-stress areas from the U-shaped hoop, thereby uniformly transmitting the pressure to the bottom of the building beam 100. This uniform pressure distribution avoids crushing or damage to the building beam 100 caused by local stress concentration, ensuring that the preload can act stably and effectively on the building beam 100, thus maintaining the integrity and long-term stability of the reinforced structure.

[0046] In some embodiments described above in this application, a building reinforcement structure is proposed, wherein the reinforcement component 1 includes a U-shaped hoop and a beam top flat steel, wherein one end of the U-shaped hoop extends above the building beam 100 to connect with the end of the beam top flat steel. However, in the actual installation and connection process, how to ensure that the fasteners 13 can accurately and effectively pass through these components and guarantee the stability of the connection is a problem that needs to be solved. If only on-site drilling or inaccurate positioning is relied upon, it may lead to low installation efficiency and even affect the strength of the connection and the application of preload.

[0047] Furthermore, perforations are provided on the U-shaped hoop and the top flat steel of the beam at positions corresponding to the tie rods.

[0048] By pre-drilling corresponding through holes in the U-shaped hoop and the top flat steel of the beam, the tie rods can be directly passed through these pre-set holes during installation. This pre-drilled hole design ensures that the tie rods can accurately pass through the U-shaped hoop and the top flat steel of the beam, thereby achieving precise positioning and connection. After the tie rods pass through the through holes, they are fixed with fasteners 13 such as nuts, and a pre-tightening force is applied, so that the U-shaped hoop and the top flat steel of the beam can tightly wrap around the building beam 100 and form a stable connection with the top connector 12. This structure not only simplifies the on-site installation process and improves installation efficiency, but also avoids structural damage or insufficient connection strength caused by inaccurate drilling on-site due to the precise hole positions, thereby ensuring the overall stability and load-bearing capacity of the reinforced structure.

[0049] In some embodiments described above in this application, a building reinforcement structure is proposed, comprising a reinforcement component 1 and a load-bearing structure 2. The reinforcement component 1 includes a U-shaped hoop and a beam top flat steel, and the load-bearing structure 2 is used for rigid connection of the cantilever steel beam 300. However, in practical applications, how to ensure an efficient and stable connection between the load-bearing structure 2 and the reinforcement component 1 to reliably transfer the load from the cantilever steel beam 300 and guarantee the structural integrity and safety of the entire reinforcement system is a technical problem that requires further optimization.

[0050] In this regard, this application further proposes that the load-bearing structure 2 includes a newly added steel secondary beam 21, the end of which is rigidly connected to the side plate of the U-shaped hoop plate.

[0051] The newly added secondary steel beam 21 refers to a secondary steel beam added to the existing building structure to bear additional loads or change the force transmission path. This type of secondary beam typically uses standard steel sections, such as H-beams, I-beams, channel steel, or box-section steel, and its cross-sectional shape and dimensions can be designed according to actual load requirements and space constraints. As a load-bearing structure 2, the newly added secondary steel beam 21 provides a clear force path and sufficient load-bearing capacity to support the cantilevered steel beam 300 and effectively transfer its load to the reinforcement component 1. The ends of the newly added secondary steel beam 21 are rigidly connected to the side plates of the U-shaped hoop, meaning that the two form a unified whole that can jointly resist external loads. This connection method can be achieved using various technical means, such as directly connecting the end flanges and webs of the newly added secondary steel beam 21 to the side plates of the U-shaped hoop through welding, or using a friction-type connection with high-strength bolts, utilizing the friction force generated by the bolt preload to transfer shear force and bending moment.

[0052] The solution in this application optimizes the load transfer path and connection reliability by specifically defining the load-bearing structure 2 as the newly added secondary steel beam 21 and rigidly connecting its ends to the side plates of the U-shaped hoop. Specifically, the U-shaped hoop surrounds the building beam 100, forming an effective constraint and support for the building beam 100. When the cantilever steel beam 300 transfers loads through the load-bearing structure 2, these loads first act on the newly added secondary steel beam 21. Since a rigid connection is established between the ends of the newly added secondary steel beam 21 and the side plates of the U-shaped hoop, the load of the cantilever steel beam 300 can be directly and efficiently transferred to the U-shaped hoop. As part of the reinforcement component 1, the U-shaped hoop further transfers these loads to the surrounding building beam 100 and the floor slab 200 connected by the top connector 12. This rigid connection ensures that there is no relative displacement or excessive rotation between the newly added secondary steel beam 21 and the U-shaped hoop plate, thereby avoiding stress concentration and potential structural failure risks at the connection point. This makes the entire reinforced structure a stable and reliable load-bearing system, effectively improving the support capacity of the cantilever steel beam 300 and the reinforcement effect of the building beam 100.

[0053] In one specific implementation, the newly added secondary steel beam 21 can be made of H-beams, which have good bending and shear resistance. The ends of the H-beam secondary beam can be rigidly connected to the side plates of the U-shaped hoop using full penetration groove welding. Specifically, the ends of the H-beam secondary beam are precisely aligned with the side plates of the U-shaped hoop, and then, using a welding process conforming to specifications, the flanges and webs of the H-beam secondary beam are firmly welded to the side plates of the U-shaped hoop. This welded connection ensures smooth load transfer between the two, forming a structural whole.

[0054] This application further proposes that the upper part of the newly added steel secondary beam 21 is anchored to the building floor slab 200 by anchor bolts 22; and / or, the end of the newly added steel secondary beam 21 is fixedly connected to the side plate of the U-shaped hoop by welding.

[0055] The anchor bolt 22 anchoring refers to fixing the upper part of the newly added secondary steel beam 21 to the building floor slab 200 using the anchor bolt 22. This anchoring method aims to provide additional vertical and horizontal support for the newly added secondary steel beam 21, effectively limiting its displacement and rotation under stress, thereby enhancing the stability of the entire reinforced structure. The anchor bolt 22 anchoring can be achieved in ways including but not limited to: using mechanically expanding anchor bolts 22, by pre-drilling holes in the building floor slab 200, then inserting and tightening the anchor bolts 22, utilizing the expansion effect of the anchor bolts 22 to generate compressive stress on the hole wall, thereby achieving reliable mechanical locking; or using chemical anchor bolts 22, by drilling holes in the building floor slab 200, injecting special chemical adhesive, and then inserting the anchor bolts 22 into them, forming a high-strength bond after the adhesive cures.

[0056] Through the above technical solution, the connection strength and overall stability of the newly added secondary steel beam 21 and the U-shaped hoop plate are significantly improved. The newly added secondary steel beam 21 forms a strong rigid connection with the side plate of the U-shaped hoop plate through welding, ensuring the continuity and efficiency of load transfer. Simultaneously, its upper part is anchored to the building floor slab 200 by anchor bolts 22, further enhancing the overturning and lateral displacement resistance of the newly added secondary steel beam 21, effectively dispersing the load and avoiding localized stress concentration. This enables the entire building reinforcement structure to provide more reliable and safer support when bearing the complex loads from the cantilever steel beam 300, significantly improving the load-bearing capacity and service life of the reinforcement structure, thereby solving the problems of insufficient stability and poor load transfer that may occur with the newly added secondary steel beam 21 under complex stress conditions.

[0057] In some of the embodiments described above in this application, a building reinforcement structure is proposed, which includes a reinforcement component 1. However, in practical applications, when the building beam 100 is long or needs to bear large and unevenly distributed loads, a single reinforcement component 1 may not be able to provide sufficient reinforcement or effectively transfer the load.

[0058] In this regard, this application further proposes that the reinforcement component 1 in the above-mentioned building reinforcement structure is in multiple sets, which are arranged at intervals along the length direction of the building beam 100.

[0059] The reinforcing component 1 is a multiple unit, referring to the basic unit used in the building reinforcement structure to reinforce the building beam 100 and connect the load-bearing structure 2. Its number is not limited to one, but consists of two or more identical or similar reinforcing components 1. These reinforcing components 1 can adopt the same structural form and materials, or they can adopt slightly different structural forms or materials according to the stress requirements of different locations. For example, all reinforcing components 1 can be composed of U-shaped hoops and beam top flat steel, or heavier reinforcing components 1 can be used in some locations. The phrase "spaced along the length of the building beam 100" means that the multiple reinforcing components 1 are not closely arranged or concentrated at a single point on the building beam 100, but are arranged at certain intervals along the axial direction of the building beam 100. This arrangement aims to achieve uniform load distribution and continuity of reinforcement effect. The spacing can be determined in advance by calculating the spacing of each reinforcement component 1. For example, the reinforcement components 1 can be evenly arranged according to factors such as the span, load distribution, and material strength of the building beam 100; or, according to the stress analysis results of the building beam 100, the reinforcement components can be densely arranged in areas of concentrated stress and the spacing can be appropriately widened in areas of less stress.

[0060] Based on the above building reinforcement structure, please refer to Figure 2 This application also proposes a building reinforcement method, comprising the following steps: S10: Install the beam-encircling reinforcement 11 and the top connector 12 on the building beam 100 using fasteners 13 and apply pre-tightening force; S20: Fix the upper part of the load-bearing structure 2 to the floor slab 200, and rigidly connect its end to the reinforcement component 1; S30: The cantilever steel beam 300 is rigidly connected to the load-bearing structure 2.

[0061] The step of installing the beam-encircling reinforcement 11 and the top connector 12 onto the building beam 100 using fasteners 13 and applying pre-tightening force is fundamental to ensuring a tight and effective connection between the reinforcement component 1 and the building beam 100. Its function is to enable the reinforcement component 1 and the building beam 100 to work together, share the load, and improve the overall rigidity of the structure through pre-tightening force. This pre-tightening force can be achieved in various ways. For example, a torque wrench can be used to precisely tighten the fastener 13 to achieve a preset torque value, thereby generating axial tension in the fastener 13 and applying pre-tightening force to the beam-encircling reinforcement 11 and the top connector 12. Alternatively, a hydraulic tensioning device can be used to tension the fastener 13, and after reaching the designed pre-tension force, the nut can be tightened to lock it, thus applying the pre-tightening force.

[0062] The step of fixing the upper part of the load-bearing structure 2 to the floor slab 200 and rigidly connecting its ends to the reinforcement component 1 aims to reliably anchor the load-bearing structure 2 to the building floor slab 200 and form an integral unit with the installed reinforcement component 1. This ensures that the load-bearing structure 2 can effectively transfer the load of the cantilever steel beam 300 to the floor slab 200 and the reinforcement component 1, thereby achieving the reinforcement effect on the building beam 100. The upper part of the load-bearing structure 2 can be firmly fixed to the predetermined position of the building floor slab 200 using embedded parts, chemical anchors 22, or expansion bolts. The rigid connection between the ends of the load-bearing structure 2 and the reinforcement component 1 can be achieved by welding, high-strength bolt connection, or riveting to ensure that the connection can withstand bending moment and shear force and avoid relative displacement.

[0063] The step of rigidly connecting the cantilever steel beam 300 to the load-bearing structure 2 is the final step in the entire reinforcement system. Its function is to firmly connect the cantilever steel beam 300, which needs reinforcement or is newly added, to the load-bearing structure 2, allowing the load of the cantilever steel beam 300 to be effectively transferred to the building floor slab 200 and the reinforcement component 1 through the load-bearing structure 2, thereby achieving the reinforcement or expansion function of the original building structure. The ends of the cantilever steel beam 300 can be connected to the load-bearing structure 2 through welding methods such as full penetration groove welds or fillet welds to form an integral load-bearing structure. Alternatively, it can be connected using a group of high-strength bolts, such as friction-type high-strength bolts, to ensure that the connection has sufficient shear and bending resistance.

[0064] The solution presented in this application ensures the effective implementation of the building reinforcement structure through a systematic installation process. First, the reinforcement component 1, including the beam-encircling reinforcement member 11 and the top connector 12, is precisely installed on the building beam 100, and pre-tension is applied via fasteners 13. This pre-tension not only ensures close contact between the reinforcement component 1 and the building beam 100, effectively transferring the load, but also improves the stress state of the beam through prestressing, enhancing its crack resistance and deformation resistance. Subsequently, the load-bearing structure 2 is reliably fixed to the building floor slab 200 and rigidly connected to the reinforcement component 1. This connection method allows the load-bearing structure 2 to effectively distribute the load from the cantilever steel beam 300 to the floor slab 200 and the reinforcement component 1, forming a cohesive whole. Ultimately, the cantilever steel beam 300 is rigidly connected to the load-bearing structure 2, allowing the load of the cantilever steel beam 300 to be safely and efficiently transferred to the main building structure through the load-bearing structure 2, the reinforcement component 1, and the floor slab 200. This effectively reinforces or expands the function of the building beam 100. The entire installation process, through step-by-step, orderly connection and pre-tensioning, ensures that the reinforced structure achieves the design strength and stability in practical applications. This solves the problems of complex installation, weak connections, and unclear load transfer in traditional reinforcement schemes, significantly improving the reinforcement effect and construction efficiency.

[0065] In one specific implementation, when reinforcing the existing building beam 100, firstly, a U-shaped hoop is placed below the building beam 100, and the top flat steel is placed above the building beam 100. Next, the first pair of tie rods 131 are vertically passed through the U-shaped hoop and the building beam 100, and their ends are fixed to the U-shaped hoop with nuts. Simultaneously, the second pair of tie rods 132 are vertically passed through the building floor slab 200, and their ends are fixed to the top flat steel with nuts. By tightening these nuts in stages and alternately, a preload is applied to the beam-encircling reinforcement member 11 and the top connector 12, ensuring a tight fit against the building beam 100. Subsequently, the upper part of the newly added secondary steel beam 21 is anchored to the building floor slab 200 using anchor bolts 22, and its end is rigidly connected to the side plate of the U-shaped hoop by welding. Finally, the end of the newly added cantilevered steel beam 300 is welded to the newly added secondary steel beam 21, completing the installation of the entire reinforcement structure.

[0066] In a further embodiment, the steps between steps S10 further include: The protective layer at the bottom of the building beam 100 is peeled off and roughened. A reinforcing plate 3 is placed between the bottom of the building beam 100 and the beam surrounding reinforcement 11.

[0067] The bottom of beams in old buildings may have defects such as unevenness and honeycomb pitting. Removing the protective layer and roughening the surface provides a relatively regular and solid base surface, ensuring that the reinforcing plate 3 can adhere evenly and transfer force. If the base surface is uneven, localized stress concentration will occur after the reinforcing plate 3 is installed, affecting the reinforcement effect and potentially even crushing local concrete. This embodiment removes the weak surface layer, exposing solid, fresh concrete aggregate, creating a relatively smooth and rough interface. This greatly increases the actual contact area between the reinforcing plate 3 and the concrete beam. When the reinforcing plate 3 is pressed against the roughened surface by tie rods or other components, the rough concrete surface will create a strong mechanical interlocking effect with the reinforcing plate 3. This allows the newly added reinforcing plate 3 to integrate with the original concrete beam as a whole, sharing the load.

[0068] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0069] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0070] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A building reinforcement structure, characterized in that, include: The reinforcement assembly includes a beam-encircling reinforcement member for surrounding a building beam and a top connector, the beam-encircling reinforcement member and the top connector being connected by fasteners and subjected to preload; and... A load-bearing structure, the upper part of which is fixed to the floor slab of the building, and the ends of which are rigidly connected to the reinforcing components, the load-bearing structure being used for rigid connection of cantilevered steel beams.

2. The building reinforcement structure according to claim 1, characterized in that, The beam-encircling reinforcement includes a U-shaped hoop plate, and the top connector includes a beam-top flat steel.

3. The building reinforcement structure according to claim 2, characterized in that, One end of the U-shaped hoop is used to extend to the top of the building beam to connect with the end of the top flat steel of the beam.

4. The building reinforcement structure according to claim 2, characterized in that, The fasteners include: The first pair of tie rods vertically penetrates the building beam and the U-shaped hoop, and its two ends are fixed to the U-shaped hoop by nuts; and... The second pair of tie rods penetrates vertically through the floor slab of the building, and its two ends are fixed to the load-bearing structure and the top flat steel of the beam respectively by nuts.

5. The building reinforcement structure according to claim 4, characterized in that, The building reinforcement structure also includes a reinforcing plate used to support the bottom plate of the U-shaped hoop between the bottom of the building beam.

6. The building reinforcement structure according to claim 3, characterized in that, The U-shaped hoop and the top flat steel of the beam have through holes at positions corresponding to the tie rods.

7. The building reinforcement structure according to claim 2, characterized in that, The load-bearing structure includes a newly added secondary steel beam, the end of which is rigidly connected to the side plate of the U-shaped hoop plate.

8. The building reinforcement structure according to claim 7, characterized in that, The upper part of the newly added steel secondary beam is anchored to the building floor slab by anchor bolts; and / or, The end of the newly added steel secondary beam is fixedly connected to the side plate of the U-shaped hoop plate by welding.

9. A building reinforcement method, applied to a building reinforcement structure as described in any one of claims 1 to 8, characterized in that, The building reinforcement method includes the following steps: The beam-encircling reinforcement and the top connector are installed on the building beam using fasteners and preload is applied. The upper part of the load-bearing structure is fixed to the floor slab, and its ends are rigidly connected to the reinforcement components. The cantilevered steel beam is rigidly connected to the load-bearing structure.

10. The building reinforcement method as described in claim 9, characterized in that, The steps prior to installing the beam-encircling reinforcement and top connector onto the building beam using fasteners and applying preload include: The protective layer at the bottom of the building beams is peeled off and roughened. A reinforcing plate is placed between the bottom of the building beam and the beam's surrounding reinforcement.

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