Beam reinforcing structure with enlarged section of new and old concrete

Abstract

The utility model provides a new and old concrete cross section enlarged beam reinforcing structure which is arranged on an original structural column and an original structural beam and comprises a first annular steel plate, a second annular steel plate, a third annular steel plate, a fourth annular steel plate and a fourth annular steel plate, the second annular steel plate is fixed on a second opposite surface of the original structure column and is connected with the first annular steel plate; the beam fixing steel plate is fixed to the beam top and / or the beam bottom of the original structural beam and connected with the first annular steel plate and the second annular steel plate; one part of each newly-added beam edge longitudinal bar is connected to the outer side of the first annular steel plate and extends to the first opposite face of the original structural column, and the other part of each newly-added beam edge longitudinal bar is connected to the beam fixing steel plate. The annular steel plate and the beam fixing steel plate are used for fixing the beam edge longitudinal bars on the original structural column, and the problem that due to the fact that the bar planting space is small, bar planting is difficult is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of reinforcement structures, in particular to a beam reinforcement structure for increasing the cross-section of new and old concrete. Background Art

[0002] With the development of society and various industries, people's requirements for building functions and building safety are getting higher and higher. Therefore, an increasing number of buildings need to be strengthened and renovated. Especially for buildings in the 1980s and 1990s, due to the lack of building materials and the backwardness of structural calculation methods, the original calculated reinforcement ratio is relatively small. To strengthen and renovate this part of the buildings, most structural members need to increase the cross-section method to meet the requirements of existing codes and calculations. Compared with reinforcement methods such as bonding steel plates, profiled steels, and bonding carbon fibers, the method of increasing the cross-section has the advantages of simple reinforcement method, significant bearing capacity improvement effect, and mature technology. However, in the traditional method of increasing the cross-section of beams, due to the small space for implanting steel bars, there are mostly problems such as difficult implanting of steel bars, difficult to meet the implanting depth and implanting spacing, and certain damage to columns. Content of the Utility Model

[0003] Aiming at the deficiencies in the prior art, the utility model provides a beam reinforcement structure for increasing the cross-section of new and old concrete, which uses an annular steel plate and a beam fixing steel plate to fix the longitudinal bars on the beam edge to the original structural column, solving the problem of difficult implanting of steel bars.

[0004] To achieve the above object, the utility model provides a beam reinforcement structure for increasing the cross-section of new and old concrete, which is arranged on the original structural column and the original structural beam, and includes: a first annular steel plate fixed on the first opposite surface of the original structural column and extending to the original structural beam; a second annular steel plate fixed on the second opposite surface of the original structural column and connected to the first annular steel plate; a beam fixing steel plate fixed on the top and / or bottom of the original structural beam and connected to the first annular steel plate and the second annular steel plate; and a plurality of newly added longitudinal bars on the beam edge, part of which are connected to the outside of the first annular steel plate and extend to the first opposite surface of the original structural column, and the other part are connected to the beam fixing steel plate.

[0005] The beam fixing steel plate includes an upper beam fixing steel plate anchored on the top of the original structural beam; the newly added longitudinal bars on the beam edge include upper newly added longitudinal bars on the beam edge, part of which are connected to the outside of the first annular steel plate and extend to the first opposite surface of the original structural column, and the other part are connected to the upper beam fixing steel plate.

[0006] The beam fixing steel plate further includes a lower beam fixing steel plate anchored on the bottom of the original structural beam; the newly added longitudinal bars on the beam edge include lower newly added longitudinal bars on the beam edge, which are connected to the lower beam fixing steel plate.

[0007] The beam reinforcement structure for increasing the cross-section of new and old concrete further includes: a column cross-section increasing part, which is arranged between the new and old concrete of the original structural column; and a plurality of newly added column longitudinal reinforcements, which are longitudinally and spacedly implanted into the column cross-section increasing part.

[0008] The beam reinforcement structure for increasing the cross-section of new and old concrete further includes: a plurality of newly added column stirrups, which are transversely and spacedly arranged in the column cross-section increasing part and connected to the plurality of newly added column longitudinal reinforcements.

[0009] The plurality of newly added column stirrups include a plurality of first column stirrups and a plurality of second column stirrups. Among them, the first column stirrups are arranged in the area along the original structural beam on the original structural column; the second column stirrups are arranged on the upper and lower sides of the first column stirrups; and the diameter of the first column stirrups is greater than that of the second column stirrups.

[0010] The beam reinforcement structure for increasing the cross-section of new and old concrete further includes: a beam cross-section increasing part, which is arranged between the new and old concrete of the original structural beam; and a plurality of newly added beam longitudinal reinforcements, which are transversely and spacedly implanted into the beam cross-section increasing part.

[0011] The beam reinforcement structure for increasing the cross-section of new and old concrete further includes: a plurality of newly added beam stirrups, which are longitudinally and spacedly arranged in the beam cross-section increasing part and connect the plurality of newly added beam longitudinal reinforcements.

[0012] The first annular steel plate and the second annular steel plate are fixed on the original structural column through a plurality of anchor bolts.

[0013] Structural adhesive is poured between the first annular steel plate and the second annular steel plate and the original structural column.

[0014] Structural adhesive is poured between the beam fixing steel plate and the original structural beam.

[0015] As can be seen from the above solutions, the advantages of the present utility model are as follows:

[0016] Through the first annular steel plate, the second annular steel plate and the beam fixing steel plate fixed on the original structural column, the newly added beam side longitudinal reinforcements are fixed on the original structural column without penetrating into the inside of the original structural column, solving the problem of difficult rebar planting caused by the small rebar planting space mentioned above, and at the same time solving the problem of damage to the original structural column caused by rebar planting.

[0017] When using anchor bolts to fix the steel plate, compared with the rebar planting in the ordinary method of increasing the cross-section, the rebar planting depth is smaller.

[0018] The newly added beam side longitudinal reinforcements are welded to the beam fixing steel plate, and the spacing can be smaller, solving the problem that it is not easy to meet the rebar planting spacing. Brief Description of the Drawings

[0019] Figure 1Cross-sectional view of the beam reinforcement structure with enlarged cross-section of new and old concrete provided by the embodiments of the present utility model;

[0020] Figure 2 is Figure 1 the top view of the A-A cross-section in;

[0021] Among them, reference numerals:

[0022] 100 - Beam reinforcement structure with enlarged cross-section of new and old concrete;

[0023] 10 - First annular steel plate;

[0024] 11 - Second annular steel plate;

[0025] 12 - Beam fixing steel plate;

[0026] 120 - Upper beam fixing steel plate;

[0027] 121 - Lower beam fixing steel plate;

[0028] 13 - New longitudinal bars at the beam edge;

[0029] 130 - New longitudinal bars at the upper beam edge;

[0030] 14 - Anchor bolts;

[0031] 15 - Enlarged cross-section part of the column;

[0032] 16 - New longitudinal bars of the column;

[0033] 17 - New stirrups of the column;

[0034] 170 - First column stirrup;

[0035] 171 - Second column stirrup;

[0036] 18 - Enlarged cross-section part of the beam;

[0037] 19 - New longitudinal bars of the beam;

[0038] 20 - New longitudinal stirrups of the beam;

[0039] 200 - Original structure column;

[0040] 201 - First opposite side;

[0041] 202 - Second opposite side;

[0042] 203 - Side boundary of the original structure column;

[0043] 300 - Original structure beam;

[0044] 301 - Beam top;

[0045] 302 - Beam bottom;

[0046] 303 - Side boundary of the original structural beam;

[0047] 304 - Boundary of the beam after increasing the cross - section. Specific embodiments

[0048] The technical solution of the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and efficacy of the present utility model, but it is not intended to limit the scope of protection of the appended claims of the present utility model.

[0049] References to "embodiment", "another embodiment", "this embodiment", etc. in the specification refer to the fact that the described embodiment may include specific features, structures or characteristics, but not every embodiment must include these specific features, structures or characteristics. In addition, such expressions do not refer to the same embodiment. Further, when combining specific features, structures or characteristics in an embodiment, whether or not explicitly described, it has been shown that it is within the knowledge of those skilled in the art to combine such features, structures or characteristics into other embodiments.

[0050] In the specification and subsequent claims, certain terms are used to refer to specific components or parts. Those of ordinary skill in the art should understand that technology users or manufacturers may use different nouns or terms to refer to the same component or part. The specification and claims do not use the difference in name as a way to distinguish components or parts, but use the difference in function of components or parts as the criterion for distinction. The terms "including" and "comprising" mentioned throughout the specification and claims are open - ended terms and should be interpreted as "including but not limited to". In addition, the term "connected" herein includes any direct and indirect electrical connection means. Indirect electrical connection means include connection through other devices.

[0051] It should be noted that in the description of the present utility model, the orientation or positional relationship or parameters indicated by terms such as "lateral", "longitudinal", "upper", "lower", "top", "bottom", "left", "right", etc. are all based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description content, and does not indicate or imply that the device or element referred to must have a specific orientation, a specific size or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model.

[0052] The embodiment of the present utility model provides a beam reinforcement structure for increasing the cross - section of new and old concrete, which solves the problem of difficult rebar planting due to the small rebar planting space.

[0053] To solve the above problems, the general idea of the technical solution provided by the embodiments of the present utility model is as follows. The longitudinal bars at the beam edge are fixed to the original structural column through the annular steel plate and the beam fixing steel plate fixed to the original structural column.

[0054] Figure 1 It is a cross-sectional view of the beam reinforcement structure with enlarged cross-section of new and old concrete provided by the embodiments of the present utility model. Figure 2 is Figure 1 The top view of the A-A cross-section in, as shown in the figure. The beam reinforcement structure 100 with enlarged cross-section of new and old concrete provided by the embodiments of the present utility model (hereinafter referred to as structure 100) is arranged on the original structural column 200 and the original structural beam 300, and includes a first annular steel 10, a second annular steel plate 11, a beam fixing steel plate 12, and a plurality of new longitudinal bars 13 at the beam edge. Figure 1 The side boundary 203 of the original structural column 200 is also shown in. Figure 2 The side boundary 303 of the original structural beam 300 and the boundary 304 of the beam after the cross-section of the original structural beam 300 is enlarged are also shown in. Among them:

[0055] The first annular steel 10 is fixed on the first opposite surface 201 of the original structural column 200 and extends to the original structural beam 300; the second annular steel plate 11 is fixed on the second opposite surface 202 of the original structural column 200 and is connected to the first annular steel plate 10, for example, by welding to form a closed force-bearing structure; the beam fixing steel plate 12 is fixed on the beam top 301 and / or the beam bottom 302 of the original structural beam 300 and can be connected to the first annular steel plate 10 and the second annular steel plate 11 by welding; a plurality of new longitudinal bars 13 at the beam edge, a part of which is connected to the outside of the first annular steel plate 10 and extends to the first opposite surface 201 of the original structural column 200, and the other part is connected to the beam fixing steel plate 12.

[0056] In this embodiment, structural adhesive can be poured between the first annular steel plate 10 and the second annular steel plate 11 and the original structural column 200. And the first annular steel plate 10 and the second annular steel plate 11 are anchored to the original structural column 200 through a plurality of anchor bolts 14.

[0057] In this embodiment, the beam fixing steel plate 12 includes an upper beam fixing steel plate 120 and a lower beam fixing steel plate 121. Among them, the upper beam fixing steel plate 120 is anchored to the beam top 301 of the original structural beam 300; the lower beam fixing steel plate 121 is anchored to the beam bottom 302 of the original structural beam 300. Structural adhesive can be poured between the upper beam fixing steel plate 120 and the original structural beam 300 and between the lower beam fixing steel plate 121 and the original structural beam 300.

[0058] In this embodiment, the newly added longitudinal bars 13 at the beam edge include the newly added longitudinal bars 130 on the beam. A part of them can be connected to the outer side of the first annular steel plate 10 by welding and extend to the first opposite side 201 of the original structural column 200, and the other part is connected to the fixed steel plate 120 on the beam by welding.

[0059] In this embodiment, the newly added longitudinal bars 13 at the beam edge also include the newly added longitudinal bars at the beam bottom (not shown in the figure), which are connected to the fixed steel plate 121 at the beam bottom by welding.

[0060] In this embodiment, the structure 100 further includes: a column enlarged cross-section part 15, a plurality of newly added column longitudinal bars 16, and a plurality of newly added column stirrups 17. Among them: the column enlarged cross-section part 15 is arranged between the new and old concretes of the original structural column 200; a plurality of newly added column longitudinal bars 16 are longitudinally and spacedly implanted into the column enlarged cross-section part 15; a plurality of newly added column stirrups 17 are transversely and spacedly arranged in the column enlarged cross-section part 15 and connected to the plurality of newly added column longitudinal bars 16, for example, tied together. It should be noted that the "longitudinal direction" mentioned in the embodiment of the present invention refers to Figure 1 the up and down direction, and the "transverse direction" refers to Figure 1 the left and right direction in it, and does not limit a specific orientation.

[0061] In this embodiment, the plurality of newly added column stirrups 17 include a plurality of first column stirrups 170 and a plurality of second column stirrups 171. Among them, the first column stirrups 170 are spacedly arranged in the along-line area of the original structural beam 300 along the original structural column 200; the second column stirrups 171 are arranged on the upper and lower sides of the first column stirrups 170; the diameter of the first column stirrups 171 is larger than that of the second column stirrups 171 to improve the stability at the joint of the original structural column 200 and the original structural beam 300.

[0062] In this embodiment, the structure 100 further includes: a beam enlarged cross-section part 18, a plurality of newly added beam longitudinal bars 19, and a plurality of newly added beam stirrups 20. Among them, the beam enlarged cross-section part 18 is arranged between the new and old concretes of the original structural beam 300; a plurality of newly added beam longitudinal bars 19 are transversely and spacedly implanted into the beam enlarged cross-section part 18; a plurality of newly added beam stirrups 20 are longitudinally and spacedly arranged in the beam enlarged cross-section part 18 and connected to the plurality of newly added beam longitudinal bars 19. For example, tied together.

[0063] Specifically, the construction process is as follows: (1) Enlarge the cross-sectional range of the original structural column 200, and roughen the interface between the new and old concretes of the column; (2) Enlarge the cross-sectional range of the original structural beam 300, and roughen the interface between the new and old concretes of the beam; (3) Layout and drill holes for multiple anchor bolts 14 on the original structural column 200 according to the actual scenario; it should be noted that the steel bars inside the original structural column 200 shall not be damaged during drilling. The positions of the anchor bolts 14 can be slightly adjusted to avoid the steel bars. It is recommended to first detect the steel bars inside the original structural column 200 before drilling; (4) Locate and drill holes on the first annular steel plate 10 and the second annular steel plate 11 according to the actual hole-opening positions; (5) Install the first annular steel plate 10 and fix it with the anchor bolts 14; (6) Install the second annular steel plate 11 and fix it with the anchor bolts 14; (7) Weld and fix the second annular steel plate 11 to the first annular steel plate 10. Both the upper beam fixing steel plate 120 and the lower beam fixing steel plate 121 are welded and fixed to the first annular steel plate 10 and the second annular steel plate 11; it should be noted that the steel plates used in the present utility model need to have sufficient rigidity to meet the force requirements; (8) Weld a part of the newly added longitudinal bars 130 on the beam edge to the outside of the first annular steel plate 10, and weld another part of the newly added longitudinal bars 130 on the beam to the upper beam fixing steel plate 120. Weld the newly added longitudinal bars under the beam to the lower beam fixing steel plate 121; (9) Structural adhesive can be poured between the first annular steel plate 10 and the second annular steel plate 11 and the original structural column 200, and structural adhesive is poured between the upper beam fixing steel plate 120 and the lower beam fixing steel plate 121 and the original structural beam 300; (10) Before the beam-column pouring, perform anti-corrosion treatment on the first annular steel plate 10 and the second annular steel plate 11; (11) Insert and reinforce the newly added column longitudinal bars 16 in the enlarged cross-section part 15 of the column, and bind the newly added column longitudinal bars 16 and the newly added column stirrups 17; (12) Insert and reinforce the newly added beam longitudinal bars 19 in the enlarged cross-section part 18 of the beam, and bind the newly added beam longitudinal bars 19 and the newly added beam stirrups 20; (13) Formwork and pour the beam-column concrete.

[0064] The structure 100 disclosed by the present utility model can be applicable to the situation where the cross-sections of both the original structural beam 300 and the original structural column 200 are enlarged, and can also be applicable to the situation where only the cross-section of the original structural beam 300 is enlarged by the sectional enlargement method, and the solution is simpler. In the case where only the cross-section of the original structural beam 300 is enlarged by the sectional enlargement method, the difference from the above embodiment is only that the newly added longitudinal bars 130 on the beam edge are directly welded to the upper beam fixing steel plate 120, and it is not necessary to weld a part of them to the first annular steel plate 10.

[0065] In summary, in the present utility model, through the first annular steel plate, the second annular steel plate and the beam fixing steel plate fixed on the original structural column, the longitudinal bars at the edge of the newly added beam are fixed on the original structural column without penetrating into the interior of the original structural column, solving the problem of difficult rebar planting caused by the small rebar planting space mentioned above, and at the same time solving the problem of damage to the original structural column caused by rebar planting; the depth of the newly added rebar planted by anchor bolts is relatively small; the longitudinal bars at the edge of the newly added beam are welded to the beam fixing steel plate, and the spacing can be relatively small, solving the problem that it is not easy to meet the rebar planting spacing requirement.

[0066] The embodiments of the present utility model have been described above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present utility model, those of ordinary skill in the art can also make many forms without departing from the purpose of the present utility model and the scope protected by the claims, and all of them belong to the protection scope of the present utility model.

Claims

1. A beam reinforcement structure with enlarged cross-section of new and old concrete, arranged on the original structural column and the original structural beam, characterized in that: include: A first annular steel plate, fixed to a first opposite surface of the original structural column and extending to the original structural beam; A second annular steel plate is fixed on the second opposite surface of the original structural column and connected to the first annular steel plate; A beam fixing steel plate, fixed to the beam top and / or beam bottom of the original structural beam, and connected to the first annular steel plate and the second annular steel plate; A plurality of newly added beam side longitudinal reinforcements, a portion of which is connected to the outer side of the first annular steel plate and extends to the first opposite side of the original structural column, and another portion of which is connected to the beam fixing steel plate.

2. The new and old concrete beam reinforcement structure with enlarged cross-section according to claim 1 is characterized in that: The beam fixing steel plate includes a beam fixing steel plate, which is anchored to the top of the original structural beam; the newly added beam side longitudinal reinforcement includes newly added beam side longitudinal reinforcement on the beam, one part of which is connected to the outer side of the first annular steel plate and extends to the first opposite side of the original structural column, and the other part is connected to the beam fixing steel plate.

3. The new and old concrete beam reinforcement structure with enlarged cross-section according to claim 1 is characterized in that: The beam fixing steel plate includes a beam fixing steel plate anchored at the bottom of the original structural beam; the newly added beam side longitudinal reinforcement includes newly added beam side longitudinal reinforcement under the beam, which is connected to the beam fixing steel plate.

4. The new and old concrete beam reinforcement structure with enlarged cross-section according to claim 1 is characterized in that: Also includes: The column with enlarged cross-section is arranged between the new and old concrete of the original structural column; A plurality of newly added column longitudinal reinforcements are longitudinally implanted at intervals within the increased cross-section portion of the column.

5. The new and old concrete beam reinforcement structure with enlarged cross-section according to claim 4 is characterized in that: Also includes: A plurality of newly added column stirrups are arranged at transverse intervals in the increased cross-section portion of the column and connected to the plurality of newly added column longitudinal reinforcements.

6. The new and old concrete beam reinforcement structure with enlarged cross-section according to claim 5, characterized in that: The multiple newly added column stirrups include multiple first column stirrups and multiple second column stirrups, wherein the first column stirrups are arranged in the area along the original structural beam of the original structural column; the second column stirrups are arranged on the upper and lower sides of the first column stirrups; the diameter of the first column stirrups is greater than the diameter of the second column stirrups.

7. The new and old concrete beam reinforcement structure with enlarged cross-section according to claim 1 is characterized in that: Also includes: The enlarged cross-section portion of the beam is arranged between the new and old concrete of the original structural beam; A plurality of newly added longitudinal reinforcements are implanted at transverse intervals into the increased cross-section portion of the beam.

8. The new and old concrete beam reinforcement structure with enlarged cross-section according to claim 7, characterized in that: It also includes a plurality of newly added beam stirrups, which are longitudinally spaced apart and arranged in the increased cross-section portion of the beam and connect the plurality of newly added beam longitudinal reinforcements.

9. The new and old concrete beam reinforcement structure with enlarged cross-section according to claim 1, characterized in that: The first annular steel plate and the second annular steel plate are fixed to the original structural column by a plurality of anchor bolts.

10. The new and old concrete beam reinforcement structure with enlarged cross-section according to claim 1, characterized in that: Structural adhesive is poured between the first annular steel plate, the second annular steel plate and the original structural column.

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