A reinforcing structure for existing multi-storey masonry dwellings

Abstract

The utility model relates to a kind of reinforcing structure for existing multi-storey masonry house, including steel reinforced concrete side column, roof layer concrete hoop beam, transverse reinforcing unit and longitudinal reinforcing unit;Steel reinforced concrete side column is installed at the junction of adjacent existing masonry wall and is located on the four end points of residence, adjacent steel reinforced concrete side column is connected by roof layer concrete hoop beam and forms longitudinal beam and transverse beam, steel reinforced concrete side column is connected by transverse reinforcing unit and longitudinal reinforcing unit between steel reinforced concrete side column, steel reinforced concrete side column, roof layer concrete hoop beam, transverse reinforcing unit and longitudinal reinforcing unit are interconnected and form cast-in-place unit.The different directions of existing residence are reinforced and connected as a whole, the lateral stiffness of the structure system formed is much larger than the lateral stiffness of existing masonry wall structure, when subjected to earthquake action, horizontal action is mainly borne and energy-dissipated by outside three-dimensional wrapping type frame structure, thereby greatly improving the seismic performance level of overall structure.

Description

Technical Field

[0001] This utility model relates to the field of existing residential reinforcement technology, and in particular to a reinforcement structure for existing multi-story masonry residential buildings. Background Technology

[0002] Masonry structures are widely used in multi-story residential buildings due to their wide availability of materials, ease of construction, low cost, good durability and stability, excellent fire resistance, good thermal insulation, and strong adaptability. From 1981 to 2005, the total area of ​​masonry structure buildings constructed in large and medium-sized cities in my country was approximately 26-28.5 billion square meters. 2 (Of which, 10.58 billion m³ was generated from 1981 to 1990) 2 From 1991 to 2000, it was 10.86 billion to 13.36 billion m³. 2 The figure for 2001-2005 was 4.56 billion m³. 2 There are approximately 161 million self-built masonry structure houses in urban and rural areas. However, with the acceleration of new urbanization and the diversification of building functional requirements, the safety problems of existing multi-story residential masonry structures, such as wall cracking and building tilting, are becoming increasingly prominent due to factors such as the expiration of their service life, low design and construction standards, insufficient seismic structural measures, material weathering, foundation settlement, and human damage. Structural reinforcement is now urgent, especially in earthquake-prone and high-intensity areas.

[0003] Traditional techniques for reinforcing existing multi-story residential masonry structures mainly include the following categories: (i) Reinforcing vertical lateral force resisting members (load-bearing masonry walls) to improve strength, stiffness, and stability. These mainly include surface layer reinforcement of masonry (steel wire mesh mortar, steel wire rope mesh-polymer mortar, steel wire mesh high-ductility cement composite mortar, concrete, carbon fiber bonding, steel plate bonding, etc.), replacement of existing mortar reinforcement, prestressed reinforcement, and fiber-reinforced mortar injection reinforcement; (ii) Seismic structural reinforcement to improve the overall integrity of the masonry structure. This is mainly achieved by adding structural columns, ring beams, horizontal tie rods, etc., to improve the seismic performance of the building; (iii) Seismic isolation reinforcement to add energy dissipation devices to absorb seismic energy or increase structural damping, and to add seismic isolation bearings to reduce the seismic action on the existing structure. These mainly include adding steel supports or graphite sliding seismic isolation, seismic isolation blocks, and rubber seismic isolation bearings. The above-mentioned reinforcement methods have greatly improved the safety redundancy and seismic performance of existing multi-story residential masonry structures, but they all require door-to-door construction to be implemented, which has a significant impact on residents' lives. The demolition of the masonry decorative surface layer is a large-scale project, generating a lot of construction waste and serious environmental pollution. Residents need to be temporarily relocated, which is costly and difficult to coordinate, and can easily lead to social problems.

[0004] In recent years, the technology of using prefabricated outer casing to reinforce masonry structures has become increasingly popular due to its advantages such as no need to move into the house, no need for residents to relocate, short construction period, green and low-carbon nature, and low overall cost. While existing multi-story residential masonry structures have significantly improved their seismic performance and masonry bearing capacity through prefabricated outer casing reinforcement, and largely achieved construction without entering the buildings, the addition of shear walls alters the community planning (including key indicators such as floor area ratio and green space ratio). Furthermore, the following aspects require further attention: (i) Uneven stiffness changes caused by the addition of new longitudinal and transverse components; (ii) Due to the use of thin cast-in-place or precast hollow slabs, the horizontal stiffness of existing multi-story residential masonry structures is difficult to coordinate with the deformation of the reinforced vertical lateral force resisting components, and current prefabricated outer casing reinforcement largely ignores horizontal reinforcement; (iii) The synergistic effect between the prefabricated outer casing reinforcement components and the existing multi-story masonry structure is unclear, directly determining and influencing the shared bearing capacity of the new and old connections and their structural measures; (iv) The seismic performance of existing multi-story masonry structures reinforced with prefabricated outer casing is low, and energy is still dissipated through the yielding of existing masonry structure components.

[0005] The invention patent with publication number CN104213717B discloses a method for integrated renovation and construction of multi-story residential buildings, including the following steps: (1) arranging concrete shear wall elevator shafts at corresponding positions in the outdoor stairwells or courtyards of the multi-story residential buildings; (2) reinforcing the outer side of the outer walls of the multi-story residential buildings with single-sided concrete slab walls; (3) setting buttress columns at the outdoor positions close to the original walls at the intersection of the longitudinal and transverse walls of the multi-story residential buildings; (4) pouring concrete roof beams on the roof top of the buttress columns and pre-embedding anchors, and adding a layer of pitched roof steel structure to the roof top.

[0006] Therefore, providing a structure for reinforcing existing dwellings is an urgent problem that needs to be solved. Utility Model Content

[0007] The purpose of this utility model is to overcome the defects of the existing technology and provide a reinforcement structure for existing multi-story masonry residential buildings.

[0008] The objective of this utility model can be achieved through the following technical solutions:

[0009] According to one aspect of the present invention, a reinforcement structure for an existing multi-story masonry residential building is provided, the residential building including a ground floor and a plurality of existing masonry walls, the plurality of existing masonry walls being installed on the ground floor and interconnected with each other, the reinforcement structure including steel-concrete composite edge columns, roof concrete hoop beams, transverse reinforcement units and longitudinal reinforcement units.

[0010] The steel-concrete composite edge columns are installed at the connection points of adjacent existing masonry walls and at the four ends of the residence. Adjacent steel-concrete composite edge columns are connected by roof concrete hoop beams to form longitudinal and transverse beams. The steel-concrete composite edge columns are connected by transverse and longitudinal reinforcement units. The steel-concrete composite edge columns, roof concrete hoop beams, transverse reinforcement units, and longitudinal reinforcement units are interconnected to form cast-in-place units.

[0011] As a preferred technical solution, the longitudinal reinforcement unit includes a steel-concrete composite central column, which is connected to a transverse beam and is perpendicular to the transverse beam. The steel-concrete composite central columns are spaced apart.

[0012] As a preferred technical solution, the structure further includes a roof concrete beam, which is installed on a transverse beam and aligned with the steel-concrete side columns and the steel-concrete center columns, respectively.

[0013] As a preferred technical solution, both the transverse reinforcement unit and the longitudinal reinforcement unit include standard-layer concrete hoop beams. Adjacent steel-concrete side columns are connected by standard-layer concrete hoop beams. The standard-layer concrete hoop beams are concentric with the longitudinal beams or transverse beams, and the standard-layer concrete hoop beams are spaced apart.

[0014] As a preferred technical solution, the steel-concrete side columns or steel-concrete middle columns are connected to the standard floor concrete hoops or the roof floor concrete hoops through cast-in-place units.

[0015] As a preferred technical solution, both the steel-concrete side column and the steel-concrete middle column include a first reinforcing bar and a first steel section, and both the standard floor concrete hoop beam and the roof floor concrete hoop beam include a first reinforcing bar and a second reinforcing bar. The first reinforcing bar and the second reinforcing bar of the standard floor concrete hoop beam or the roof floor concrete hoop beam pass through the cast-in-place unit, and the first reinforcing bar and the first steel section pass through the cast-in-place unit.

[0016] As a preferred technical solution, the structure further includes a tapered threaded sleeve and a second steel section. The first reinforcing bar of the steel-concrete side column or the steel-concrete middle column is connected in the cast-in-place unit through the tapered threaded sleeve. The second steel section is installed in the cast-in-place unit and the first steel section and the second steel section are connected.

[0017] As a preferred technical solution, the structure further includes a steel sleeve and a concrete key connector. The steel-concrete side column or steel-concrete middle column is connected to the existing masonry wall through the concrete key connector. The steel sleeve passes through the existing masonry wall, the steel sleeve, and the concrete key connector.

[0018] As a preferred technical solution, the structure further includes a butt weld, and the second steel section is connected to the steel sleeve through the butt weld.

[0019] As a preferred technical solution, the structure also includes reinforcement components, and the existing masonry wall, steel-concrete side column and steel-concrete central column are all installed on the ground through the reinforcement components.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This utility model is equipped with steel-concrete side columns, roof concrete hoop beams, horizontal reinforcement units and longitudinal reinforcement units, which reinforce the existing residential buildings in different directions and connect them into a whole. The lateral stiffness of the resulting structural system is much greater than that of the existing masonry wall structure. When subjected to earthquake action, the horizontal force is mainly borne and dissipated by the outer three-dimensional wrapping frame structure, thereby greatly improving the seismic performance of the overall structure.

[0022] 2. The steel-concrete side columns, roof concrete hoop beams, transverse reinforcement units and longitudinal reinforcement units of this utility model do not require damage to the existing walls, and at the same time avoid the need to enter the existing multi-story residential buildings for reinforcement construction. Residents do not need to be relocated, which greatly saves the overall construction cost, has little impact on the normal life of residents, greatly enhances the residents' sense of community, and is highly feasible.

[0023] 3. In this utility model, the standard-layer concrete hoop beams and steel-concrete mid-column are spaced apart, which improves the structural strength and disperses stress.

[0024] 4. The reinforcement structure of this utility model does not change the existing community planning indicators, is highly feasible, requires very little external expansion area, and does not change the main planning indicators such as plot ratio, green space ratio, and sunlight spacing, thereby increasing the safety and comfort of residents' lives.

[0025] 5. Most of the components used in the reinforcement structure of this utility model are prefabricated, resulting in less on-site casting, high quality control, less on-site environmental pollution, fast construction speed, easy operation, and reduced labor costs. Attached Figure Description

[0026] Figure 1 This is a front view structural diagram of the present utility model;

[0027] Figure 2 This is a schematic diagram of the standard layer planar structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the roof layer plan structure of this utility model;

[0029] Figure 4This is a side view of the structure of this utility model;

[0030] Figure 5 This utility model Figure 2 or Figure 3 A cross-sectional view at point AA or BB;

[0031] Figure 6 This is a schematic diagram showing the connection between the steel-concrete edge column, the roof concrete hoop beam, the steel-concrete middle column, and the standard floor concrete hoop beam of this utility model and the existing masonry wall.

[0032] Figure 7 This utility model Figure 6 Schematic diagram of the cross-sectional structure at the CC point;

[0033] Figure 8 This utility model Figure 6 Schematic diagram of the cross-sectional structure at point DD;

[0034] 1. Steel-concrete composite edge column; 2. Steel-concrete composite center column; 3. Standard floor concrete stirrup beam; 4. Steel sleeve; 5. Roof floor concrete stirrup beam; 6. Roof floor concrete beam; 7. Concrete key connector; 8. Existing masonry wall; 9. Reinforcing member; 10. First reinforcing bar; 11. Tapered thread sleeve; 12. First steel section; 13. Second steel section; 14. Butt weld; 15. Second reinforcing bar; 16. Cast-in-place concrete; 17. Existing concrete floor slab; AA. First section; BB. Second section; CC. Third section; DD. Fourth section; E. Indoor ground; F. Outdoor ground. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0036] In order to achieve a construction mode that does not involve entering the house, does not change the existing community planning indicators, is highly feasible, improves the degree of industrialization, achieves energy conservation and environmental protection, greatly improves the overall seismic performance of the structure, and ensures the safety of the existing multi-story residential masonry structure, this utility model proposes a reinforcement structure.

[0037] Example 1

[0038] like Figures 1-5As shown, a reinforcement structure for an existing multi-story masonry residential building is provided. The residential building includes a ground floor and multiple existing masonry walls 8, all of which are installed on the ground floor and are interconnected. The reinforcement structure is characterized by including steel-concrete composite edge columns 1, roof concrete hoop beams 5, transverse reinforcement units, and longitudinal reinforcement units.

[0039] The steel-concrete edge columns 1 are installed at the connection of adjacent existing masonry walls 8 and are located at the four ends of the residence. Adjacent steel-concrete edge columns 1 are connected by roof concrete hoop beams 5 to form longitudinal and transverse beams. The steel-concrete edge columns 1 are connected by transverse and longitudinal reinforcement units. The steel-concrete edge columns 1, roof concrete hoop beams 5, transverse reinforcement units and longitudinal reinforcement units are interconnected to form cast-in-place units.

[0040] The longitudinal reinforcement unit includes a steel-concrete composite column 2, which is connected to a transverse beam and is perpendicular to the transverse beam. The steel-concrete composite columns 2 are spaced apart.

[0041] The structure also includes a roof concrete beam 6, which is installed on a transverse beam and is aligned with the steel-concrete side column 1 and the steel-concrete center column 2, respectively.

[0042] Both the transverse reinforcement unit and the longitudinal reinforcement unit include standard layer concrete hoop beams 3. Adjacent steel-concrete side columns 1 are connected by standard layer concrete hoop beams 3. The standard layer concrete hoop beams 3 are concentric with the longitudinal beams or transverse beams respectively, and the standard layer concrete hoop beams 3 are all spaced apart.

[0043] In this embodiment, the residential building is simplified, taking a three-dimensional rectangular frame as an example. The building forms a multi-layer three-dimensional rectangular structure through existing masonry walls 8. The building consists of a roof layer and multiple planar layers. Steel-concrete composite edge columns 1 are installed at the four ends of the building (i.e., the four ends of the rectangle) and perpendicular to the ground, fixing the roof layer and multiple planar layers vertically. Concrete hoop beams 5 are installed on the roof layer, along the horizontal and vertical directions of the roof layer, and connected to the steel-concrete composite edge columns 1 (i.e., forming two horizontal beams and two vertical beams with the long and short sides of the rectangle, respectively). Steel-concrete composite center columns 2 are installed on the horizontal beams and connected to the ground (i.e., flush with the steel-concrete composite edge columns 1). The steel-concrete central columns 2 are distributed at intervals along the transverse direction, passing through the roof layer and the planar layer. The roof layer concrete beams 6 are installed above the transverse beams and are distributed at intervals. Specifically, the steel-concrete central columns 2 and the existing longitudinal masonry walls 8 are aligned to connect the transverse beams together. The standard floor concrete hoop beams 3 connect the adjacent steel-concrete side columns 1, and are connected in both longitudinal and transverse directions (i.e., the standard floor concrete hoop beams 3 are parallel to the longitudinal beams and transverse beams respectively). Through the interlacing longitudinal and transverse connections of the steel-concrete side columns 1, steel-concrete central columns 2, standard floor concrete hoop beams 3, roof layer concrete hoop beams 5 and roof layer concrete beams 6, the framework of the reinforcement structure of this utility model is formed.

[0044] The process involves prefabricating steel-concrete edge columns 1, steel-concrete central columns 2, standard floor concrete stirrups 3, roof floor concrete stirrups 5, and roof floor concrete beams 6 in a factory. Next, the existing foundation is reinforced. The standard floor concrete stirrups 3, roof floor concrete stirrups 5, and roof floor concrete beams 6 are connected to the steel-concrete edge columns 1 and steel-concrete central columns 2 using cast-in-place concrete 16. At half the height of each floor, the steel-concrete edge columns 1 and steel-concrete central columns 2 are connected to the existing masonry walls 8 using cast-in-place concrete pins 7. Holes are drilled at the transverse penetrations of the existing masonry walls 8 on each floor using a long spiral drilling machine, and steel sleeves 4 and steel strands are installed. After the standard floor concrete stirrups 3 and roof floor concrete stirrups 5 are in place, the connection nodes between the beams and columns are cast in-place. Once the cast-in-place concrete 16 reaches the design strength, prestressing is applied, and grout is injected into the tensioning holes, thus completing the installation and reinforcement of one floor. Finally, following the above implementation method, the structural reinforcement of the entire building is completed from bottom to top, thus realizing the entire process of this utility model.

[0045] This utility model forms a structural system with uniform stiffness in both longitudinal and transverse directions through steel-concrete side columns 1, steel-concrete central columns 2, standard floor concrete hoop beams 3, roof floor concrete hoop beams 5, and roof floor concrete beams 6, which together bear the external load. In particular, the corner frame structure can strengthen the restraint of the existing masonry wall 8 with openings at the corner, and prevent the collapse of the overall structure due to earthquake damage to the local existing masonry wall.

[0046] When the structural system bears horizontal loads, the horizontal loads are transferred to the newly added reinforced structure according to the principle of lateral stiffness load distribution. This achieves a non-entry-into-house reinforcement mode for existing multi-story residential masonry structures, ensuring the safety of the existing masonry structures.

[0047] A schematic diagram of the connection between the steel-concrete composite edge column 1, the steel-concrete composite center column 2, the standard floor concrete stirrup beam 3, the roof floor concrete stirrup beam 5, the roof floor concrete beam 6, and the existing masonry wall 8 is shown in Figure 6-. Figure 8 As shown, taking the steel-concrete central column 2 (steel-concrete edge column 1), the standard floor concrete hoop beam 3 (or the roof floor concrete hoop beam 5), and the existing masonry wall 8 as an example; a concrete pin connector 7 is installed at the node between the existing masonry wall 8 and the steel-concrete central column 2 (or steel-concrete edge column 1), and a steel sleeve 4 passes through the steel-concrete central column 2 (or steel-concrete edge column 1), the concrete pin connector 7, and the existing masonry wall 8 to complete the connection; the steel sleeve 4 is made of Ф60 steel sleeve + prestressed steel strand.

[0048] The steel-concrete side column 1 or steel-concrete middle column 2 is connected to the standard floor concrete hoop beam 3 or the roof floor concrete hoop beam 5 through cast-in-place units.

[0049] The steel-concrete side column 1 and the steel-concrete middle column 2 both include a first reinforcing bar 10 and a first steel section 12. The standard floor concrete hoop beam 3 and the roof floor concrete hoop beam 5 both include a first reinforcing bar 10 and a second reinforcing bar 15. The first reinforcing bar 10 and the second reinforcing bar 15 of the standard floor concrete hoop beam 3 or the roof floor concrete hoop beam 5 pass through the cast-in-place unit. The first reinforcing bar 10 and the first steel section 12 pass through the cast-in-place unit.

[0050] The structure also includes a tapered threaded sleeve 11 and a second steel section 13. The first reinforcing bar 10 of the steel-concrete side column 1 or the steel-concrete middle column 2 is connected in the cast-in-place unit through the tapered threaded sleeve 11. The second steel section 13 is installed in the cast-in-place unit and the first steel section 12 and the second steel section 13 are connected.

[0051] The structure also includes a steel sleeve 4 and a concrete pin connector 7. The steel-concrete side column 1 or the steel-concrete middle column 2 is connected to the existing masonry wall 8 through the concrete pin connector 7. The steel sleeve 4 passes through the existing masonry wall 8, the steel sleeve 4 and the concrete pin connector 7.

[0052] The structure also includes a butt weld 14, through which the second steel 13 is connected to the steel sleeve 4.

[0053] The structure also includes a reinforcement component 9, and the existing masonry wall 8, steel-concrete side column 1 and steel-concrete central column 2 are all installed on the ground through the reinforcement component 9.

[0054] In this embodiment, as Figures 6-8 As shown, the connection relationship between the steel-concrete edge column 1, the standard floor concrete hoop beam 3 and the existing masonry wall 8 is taken as an example. However, the connection method between the steel-concrete middle column 2 and the steel-concrete edge column 1 is the same, and the connection relationship between the standard floor concrete hoop beam 3 and the roof floor concrete hoop beam 5 is the same, so they can be directly replaced.

[0055] The steel-concrete central column 2 (or steel-concrete side column 1) and the standard floor concrete hoop beam 3 (or roof floor concrete hoop beam 5) are connected by a cast-in-place unit. Specifically, the standard floor concrete hoop beam 3 (or roof floor concrete hoop beam 5) includes a first reinforcing bar 10 and a second reinforcing bar 15. The steel-concrete central column 2 and the steel-concrete side column 1 both include a first reinforcing bar 10, a first steel section 12, and a second steel section 13. The first reinforcing bar 10 and the second reinforcing bar 15 of the standard floor concrete hoop beam 3 (or roof floor concrete hoop beam 5), together with the second steel section (13) and the first reinforcing bar 10 of the steel-concrete central column 2 (or steel-concrete side column 1), form the frame of the cast-in-place unit. Cast-in-place concrete 16 is added to it to finally form the cast-in-place unit, completing the connection between the steel-concrete central column 2 (or steel-concrete side column 1) and the standard floor concrete hoop beam 3 (or roof floor concrete hoop beam 5). The second reinforcing bar 17 is a prestressed tendon.

[0056] Within the cast-in-place unit, the first reinforcing bar 10 of the steel-concrete central column 2 (or steel-concrete side column 1) is connected by a tapered threaded sleeve 11; the second steel 13 is connected to the first steel 12, and both the second steel 13 and the first steel 12 are square steel pipes.

[0057] The residential building also includes an existing concrete floor slab 17, with a steel sleeve 4 passing through a steel-concrete central column 2 (or a steel-concrete side column 1), a concrete key connector 7, and the existing concrete floor slab 17 to complete the connection.

[0058] The steel sleeve 4 is connected to the steel-concrete central column 2 (beam-column joint area) through steel strands. At the standard floor (or roof floor), it and the concrete hoop beams (standard floor concrete hoop beam 3 and roof floor concrete hoop beam 5) are constrained by the prestress of the second steel bar 15 to form a rigid floor, which coordinates the deformation of the vertical load-bearing components under horizontal loads (or actions).

[0059] The steel-concrete composite columns (steel-concrete composite middle column 2 and steel-concrete composite edge column 1) are connected to the existing masonry wall 8 by cast-in-place concrete key connectors 7, and are constrained by the prestressing of steel sleeves 4 and roof concrete beams 6, thus forming a frame structure in which the old and new structures jointly bear external loads (or actions), while coordinating deformation under external actions.

[0060] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A reinforcement structure for an existing multi-story masonry residential building, the building comprising a ground floor and a plurality of existing masonry walls (8), all of which are installed on the ground floor and are interconnected, characterized in that, The reinforcement structure includes steel-concrete side columns (1), roof concrete hoop beams (5), transverse reinforcement units, and longitudinal reinforcement units; The steel-concrete edge column (1) is installed at the connection of the adjacent existing masonry wall (8) and located at the four ends of the residence. The adjacent steel-concrete edge columns (1) are connected by the roof concrete hoop beam (5) to form longitudinal and transverse beams. The steel-concrete edge columns (1) are connected by transverse and longitudinal reinforcement units. The steel-concrete edge columns (1), the roof concrete hoop beam (5), the transverse reinforcement unit and the longitudinal reinforcement unit are interconnected to form cast-in-place units.

2. The reinforcement structure for existing multi-story masonry residential buildings according to claim 1, characterized in that, The longitudinal reinforcement unit includes a steel-concrete composite column (2), which is connected to a transverse beam and is perpendicular to the transverse beam. The steel-concrete composite columns (2) are spaced apart.

3. A reinforcement structure for existing multi-story masonry residential buildings according to claim 2, characterized in that, The structure also includes a roof concrete beam (6), which is installed on a transverse beam and is aligned with the steel-concrete side column (1) and the steel-concrete center column (2), respectively.

4. A reinforcement structure for existing multi-story masonry residential buildings according to claim 2, characterized in that, Both the transverse reinforcement unit and the longitudinal reinforcement unit include standard layer concrete hoop beams (3). Adjacent steel-concrete side columns (1) are connected by standard layer concrete hoop beams (3). The standard layer concrete hoop beams (3) are co-centered with the longitudinal beams or transverse beams, and the standard layer concrete hoop beams (3) are spaced apart.

5. A reinforcement structure for existing multi-story masonry residential buildings according to claim 4, characterized in that, The steel-concrete side column (1) or steel-concrete middle column (2) is connected to the standard floor concrete hoop beam (3) or the roof floor concrete hoop beam (5) through cast-in-place units.

6. A reinforcement structure for existing multi-story masonry residential buildings according to claim 5, characterized in that, The steel-concrete side column (1) and the steel-concrete middle column (2) both include a first reinforcing bar (10) and a first steel section (12). The standard floor concrete hoop beam (3) and the roof floor concrete hoop beam (5) both include a first reinforcing bar (10) and a second reinforcing bar (15). The first reinforcing bar (10) and the second reinforcing bar (15) of the standard floor concrete hoop beam (3) or the roof floor concrete hoop beam (5) pass through the cast-in-place unit. The first reinforcing bar (10) and the first steel section (12) pass through the cast-in-place unit.

7. A reinforcement structure for existing multi-story masonry residential buildings according to claim 6, characterized in that, The structure also includes a tapered threaded sleeve (11) and a second steel section (13). The first steel bar (10) of the steel-concrete side column (1) or steel-concrete middle column (2) is connected in the cast-in-place unit by the tapered threaded sleeve (11). The second steel section (13) is installed in the cast-in-place unit and the first steel section (12) and the second steel section (13) are connected.

8. A reinforcement structure for existing multi-story masonry residential buildings according to claim 7, characterized in that, The structure also includes a steel sleeve (4) and a concrete pin connector (7). The steel-concrete side column (1) or steel-concrete middle column (2) is connected to the existing masonry wall (8) through the concrete pin connector (7). The steel sleeve (4) passes through the existing masonry wall (8), the steel sleeve (4) and the concrete pin connector (7).

9. A reinforcement structure for existing multi-story masonry residential buildings according to claim 8, characterized in that, The structure also includes a butt weld (14), and the second steel (13) is connected to the steel sleeve (4) through the butt weld (14).

10. A reinforcement structure for existing multi-story masonry residential buildings according to claim 1, characterized in that, The structure also includes a reinforcement component (9), and the existing masonry wall (8), steel-concrete side column (1) and steel-concrete center column (2) are all installed on the ground by the reinforcement component (9).

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