New beam-existing column connection node
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-01
- Publication Date
- 2026-08-14
AI Technical Summary
[0004]有鉴于此，本实用新型提供了一种新增梁与既有柱连接节点，以解决目前进行新增梁与既有柱连接时，既有柱植筋施工难度大、现场工作量大，且植筋施工对既有柱损伤大的问题
[0011]有益效果：本实用新型提供了一种新增梁与既有柱连接节点，通过在既有柱设置少量孔位并安装少量连接筋，然后在连接筋固定连接环形筋使得环形筋位于既有柱的外围，用于形成新增梁的大量新增梁纵向钢筋能够直接固定连接在环形筋上，混凝土层成型于连接筋、环形筋以及新增梁纵向钢筋上即可使新增梁成型于既有柱。如此只需在既有柱设置植入少量连接筋，无需在既有柱进行大量钻孔，新增梁纵向钢筋无须植入既有柱内，直接插入环梁内锚固即可，大大降低了植筋施工难度并减少了现场工作量；并且减少既有柱的钻孔量能够保证既有柱的结构强度，减低施工的风险。
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Figure CN224634099U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction technology, specifically to a connection node between a newly added beam and an existing column. Background Technology
[0002] In current building renovation projects, when new frame beams are connected to existing columns, the common practice is to install rebar in the existing columns.
[0003] Specifically, the process involves drilling holes in existing columns, inserting reinforcing bars for the new frame beams at these holes, and finally pouring concrete to connect the new frame beams to the existing columns. In actual construction, this requires drilling numerous holes in the existing columns and inserting a large number of reinforcing bars for the new frame beams to ensure a stable connection. The dense reinforcement in the existing columns makes the rebar installation difficult and labor-intensive; furthermore, drilling numerous holes in the existing columns causes significant damage and poses safety hazards during construction. Utility Model Content
[0004] In view of this, the present invention provides a connection node between a new beam and an existing column to solve the problems of high difficulty in rebar installation of the existing column, large on-site workload, and significant damage to the existing column during the current connection of a new beam and an existing column.
[0005] This utility model provides a new beam-existing column connection node, including:
[0006] There is an existing column with recessed holes along its circumference;
[0007] A connecting rib is disposed in the hole, and at least a portion of the connecting rib extends out of the hole;
[0008] A ring-shaped rib is provided on the periphery of the existing column and is fixedly connected to the portion of the connecting rib that extends out of the hole.
[0009] The longitudinal reinforcement of the new beam is fixedly connected to the ring reinforcement, and concrete can be poured on the longitudinal reinforcement of the new beam to form the new beam.
[0010] A concrete layer is formed on the connecting bars, the annular bars, and the longitudinal bars of the newly added beam, so that the newly added beam is formed on the existing column.
[0011] Beneficial Effects: This utility model provides a connection node between a new beam and an existing column. By setting a few holes and installing a few connecting bars in the existing column, and then fixing and connecting the connecting bars to a ring bar so that the ring bar is located on the periphery of the existing column, a large number of longitudinal steel bars of the new beam can be directly fixed and connected to the ring bar. The concrete layer is formed on the connecting bars, the ring bar, and the longitudinal steel bars of the new beam, thus forming the new beam in the existing column. In this way, only a few connecting bars need to be installed in the existing column, eliminating the need for extensive drilling in the existing column. The longitudinal steel bars of the new beam do not need to be implanted into the existing column; they can be directly inserted into the ring beam for anchoring. This greatly reduces the difficulty of rebar installation and the amount of on-site work. Furthermore, reducing the amount of drilling in the existing column ensures the structural strength of the existing column and reduces construction risks.
[0012] In one alternative embodiment, the existing column has a circumferentially formed groove, which is formed by chiseling inward from at least a portion of the circumference of the existing column to expose the supporting ribs inside the existing column.
[0013] The hole is located in the slot, and the hole avoids the support ribs inside the existing column.
[0014] Beneficial effect: A groove is formed around the existing column to expose the supporting ribs inside the existing column, so that the opening position of the hole can avoid the supporting ribs inside the existing column and avoid the interference of the connecting ribs with the supporting ribs inside the existing column.
[0015] In one optional implementation, multiple holes are provided along the circumference of the existing column;
[0016] And / or, multiple holes are provided along the height direction of the existing column.
[0017] Beneficial effect: Multiple holes are set along the circumference and height of the existing column for installing connecting bars, thus providing sufficient installation positions for the ring bars.
[0018] In one alternative embodiment, multiple ring-shaped reinforcing bars are provided along a direction away from the existing column;
[0019] And / or, the annular reinforcement is provided in multiple directions along the height of the existing column.
[0020] Beneficial effects: Multiple ring-shaped reinforcement bars are set along the direction away from the existing column and along the height of the existing column. After the multiple ring-shaped reinforcement bars are fixedly connected with the connecting reinforcement bars, a sufficiently large circular ring extension structure is formed, which improves the structural stability of the ring beam formed by the extension structure of the existing column after the concrete is poured. It provides a stable foundation structure for the longitudinal reinforcement of the new beam, so as to facilitate the formation of a stable new beam.
[0021] In one optional embodiment, the connection node between the new beam and the existing column further includes stirrups that are arranged around the periphery of the plurality of annular bars, and the plurality of stirrups are spaced apart circumferentially along the annular bars.
[0022] Beneficial effects: By surrounding multiple ring bars with stirrups, the integrity of the multiple ring bars is improved, further enhancing the structural stability of the extension structure of the existing column after concrete pouring.
[0023] In one optional embodiment, the connection node between the new beam and the existing column also includes multiple through bars, wherein two through bars are located on the same horizontal plane, and one end of the two through bars on the same side passes through the ring bar and avoids the existing column, and the other ends of the two through bars on the same side are arranged crosswise.
[0024] Concrete can be poured onto the other end of the two through bars on the same side and onto the longitudinal reinforcement of the new beam to form the new beam.
[0025] Beneficial effect: Setting multiple through bars and pouring concrete together with the longitudinal reinforcement of the new beam to form the new beam ensures continuous transmission of bending moment at the connection node between the new beam and the existing column.
[0026] In one alternative embodiment, the existing column is configured as a square column, with the innermost annular rib abutting against the edge of the square column.
[0027] Beneficial effect: The innermost ring reinforcement of the existing column, which is set as a square column, abuts against the edge of the square column to ensure the connection stability of the ring reinforcement.
[0028] In one alternative embodiment, a clearance is formed between the outer surface of the square column and the innermost annular rib.
[0029] The connection node between the newly added beam and the existing column also includes filler bars, which are located in the void.
[0030] Beneficial effects: When the existing column is set as a square column, the filling reinforcement is placed in the void to improve the integrity of the internal steel reinforcement structure of the connection node between the new beam and the existing column, and further improve the structural stability of the connection node between the new beam and the existing column.
[0031] In one alternative embodiment, the existing column is configured as a circular column, with the innermost annular rib fitting against the outer surface of the circular column.
[0032] Beneficial effect: The innermost annular reinforcement of the existing column, which is set as a circular column, fits into the outer surface of the circular column to ensure the connection stability of the annular reinforcement. Attached Figure Description
[0033] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0034] Figure 1 A transverse sectional view of a newly added beam-existing column connection node provided for this utility model;
[0035] Figure 2 A vertical sectional view of a newly added beam and an existing column connection node provided by this utility model.
[0036] Explanation of reference numerals in the attached figures:
[0037] 1. Existing column; 2. Connecting reinforcement; 3. Ring reinforcement; 4. Longitudinal reinforcement of new beam; 5. New beam; 6. Concrete layer; 7. Trench; 8. Stirrup; 9. Through reinforcement; 10. Void; 11. Filler reinforcement; 12. Additional long reinforcement; 13. Additional short reinforcement. Detailed Implementation
[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 utility model 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0041] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0042] The following is combined with Figure 1 , Figure 2 The following describes embodiments of the present invention.
[0043] According to an embodiment of this utility model, on one hand, a new beam-existing column connection node is provided, such as... Figure 1 , Figure 2 As shown, it includes: existing column 1, connecting reinforcement 2, ring reinforcement 3, new longitudinal reinforcement of beam 4, and concrete layer 6.
[0044] The existing column 1 has recessed holes along its circumference; connecting bars 2 are located in the holes, with at least a portion of the connecting bars 2 extending out of the holes; ring bars 3 are located around the existing column 1 and are fixedly connected to the portion of the connecting bars 2 extending out of the holes; the longitudinal reinforcement 4 of the new beam is fixedly connected to the ring bars 3, and concrete can be poured on the longitudinal reinforcement 4 of the new beam to form the new beam 5; a concrete layer 6 is formed on the connecting bars 2, the ring bars 3, and the longitudinal reinforcement 4 of the new beam, so that the new beam 5 is formed on the existing column 1.
[0045] In the above embodiment, by setting a small number of holes and installing a small number of connecting bars 2 in the existing column 1, and then fixing the connecting bars 2 to the ring bars 3 so that the ring bars 3 are located on the periphery of the existing column 1, a large number of new longitudinal steel bars 4 for forming the new beam 5 can be directly fixed to the ring bars 3. The concrete layer 6 is formed on the connecting bars 2, the ring bars 3, and the new longitudinal steel bars 4, so that the new beam 5 can be formed in the existing column 1. In this way, only a small number of connecting bars 2 need to be installed in the existing column 1, without the need to drill a large number of holes in the existing column 1. The new longitudinal steel bars 4 do not need to be implanted into the existing column 1, but can be directly inserted into the ring beam for anchoring, which greatly reduces the difficulty of rebar installation and the amount of on-site work; and reducing the amount of drilling in the existing column 1 can ensure the structural strength of the existing column 1 and reduce the construction risk.
[0046] Specifically, such as Figure 1 , Figure 2As shown, holes are drilled in the existing column 1 and a small number of connecting bars 2 are installed. Then, ring bars 3 are fixedly connected to the connecting bars 2 so that the ring bars 3 are located on the periphery of the existing column 1, forming a circular extension structure on the periphery of the existing column 1. A large number of the longitudinal steel bars 4 of the new beam are directly fixed and connected to the extension structure, i.e., the ring bars 3. In this way, when pouring concrete, concrete is first poured on the part of the structure protruding from the holes in the small number of connecting bars 2 and the extension structure formed by the ring bars 3. The extension structure after pouring concrete forms a ring beam as a stable foundation for the longitudinal steel bars 4 of the new beam. Then, concrete is poured on the longitudinal steel bars 4 of the new beam, and the longitudinal steel bars 4 of the new beam after pouring concrete can form the new beam 5. Thus, the new beam 5 is formed on the existing column 1 to form a connection node between the new beam and the existing column. At the same time, compared with the hinged structure of the new beam and the existing column, the connection node between the new beam and the existing column provided in this embodiment has a smaller beam height, which can maximize the contribution of the net height.
[0047] Furthermore, such as Figure 1 , Figure 2 As shown, holes of appropriate depth are made in the existing column 1, such that the depth of the anchoring part of the connecting bar 2 extending into the hole is 10 to 12 times the diameter of the connecting bar 2 itself, and the length of the exposed part of the connecting bar 2 extending out of the hole is 18 to 22 times the diameter of the connecting bar 2 itself.
[0048] Furthermore, to ensure the continuous transfer of bending moment at the connection node between the new beam and the existing column, the reinforcement amount of the ring reinforcement 3 is not less than 70% of the reinforcement amount at the beam end of the existing column 1 connected to it. This also ensures that the total reinforcement amount on both sides of the ring beam corresponding to the ring reinforcement 3 is not less than 1.4 times the reinforcement amount at the beam end of the new beam 5.
[0049] In some embodiments, such as Figure 1 , Figure 2 As shown, a groove 7 is formed in the circumference of the existing column 1. The groove 7 is formed by chiseling inward from at least a portion of the circumference of the existing column 1 to expose the supporting ribs inside the existing column 1. Holes are provided in the groove 7, and the holes avoid the supporting ribs inside the existing column 1.
[0050] In the above embodiment, a groove 7 is formed by chiseling around the existing column 1 to expose the supporting ribs inside the existing column 1, so that the opening position of the hole avoids the supporting ribs inside the existing column 1, and avoids interference between the connecting rib 2 and the supporting ribs inside the existing column 1.
[0051] Specifically, such as Figure 1 , Figure 2As shown, the existing column 1 at the connection node is roughened and chiseled, and the grooves 7 are required to be 100mm wide, 100mm apart and 10mm deep, so as to form shear keys, which can ensure the shear force transmission of the ring beam node and improve the stability of the connection node between the new beam and the existing column.
[0052] Furthermore, this embodiment does not restrict the location of the groove 7 formed by circumferential chiseling of the existing column 1.
[0053] As one implementation method, a groove 7 is formed by chiseling out a portion of the existing column 1 around its perimeter to expose the supporting ribs inside the existing column 1, which is suitable for constructing one or two small number of new beams 5.
[0054] As another implementation, a groove 7 is formed by chiseling out the entire circumference of the existing column 1 to expose the supporting ribs inside the existing column 1, which is suitable for constructing four or more new beams 5.
[0055] In some embodiments, such as Figure 1 , Figure 2 As shown, multiple holes are provided along the circumference of the existing column 1; and / or, multiple holes are provided along the height of the existing column 1.
[0056] In the above embodiment, multiple holes are provided along the circumference and height of the existing column 1 for installing the connecting rib 2, thereby providing sufficient installation positions for the ring rib 3.
[0057] Specifically, such as Figure 1 , Figure 2 As shown, in this embodiment, the holes are arranged in four layers along the height direction of the existing column 1, with sixteen holes in each layer along the entire circumference of the existing column 1, for a total of sixty-four holes, which can be used to install sixty-four connecting bars 2. Of course, as other implementation methods, during construction, more or fewer holes can be arranged along the circumference of the existing column 1, or more or fewer holes can be arranged along the height direction of the existing column 1, depending on actual needs.
[0058] In some embodiments, such as Figure 1 , Figure 2 As shown, multiple annular reinforcing bars 3 are provided along the direction away from the existing column 1; and / or, multiple annular reinforcing bars 3 are provided along the height direction of the existing column 1.
[0059] In the above embodiment, multiple annular reinforcement bars 3 are arranged along the direction away from the existing column 1 and along the height direction of the existing column 1. After the multiple annular reinforcement bars 3 are fixedly connected with the connecting reinforcement bars 2, a sufficiently large annular extension structure is formed, which improves the structural stability of the ring beam formed by the extension structure of the existing column 1 after the concrete is poured, and provides a stable foundation structure for the longitudinal reinforcement bars 4 of the new beam, so as to facilitate the formation of a stable new beam 5.
[0060] Specifically, such as Figure 1 , Figure 2 As shown, in this embodiment, the annular reinforcement 3 is arranged in five layers along the height direction of the existing column 1, and each layer has four annular reinforcement 3 with increasing radii in the direction away from the existing column 1, that is, a total of twenty annular reinforcement 3. Of course, as other implementation methods, in construction, according to actual needs, more or fewer annular reinforcement 3 can be arranged along the direction away from the existing column 1, and more or fewer annular reinforcement 3 can be arranged along the height direction of the existing column 1.
[0061] In some embodiments, such as Figure 1 , Figure 2 As shown, the connection node between the newly added beam and the existing column also includes stirrups 8 that are wrapped around the periphery of multiple ring bars 3, and the multiple stirrups 8 are spaced apart along the circumference of the ring bars 3.
[0062] In the above embodiment, stirrups 8 are provided around the multiple annular bars 3 to improve the integrity of the multiple annular bars 3 and further improve the structural stability of the extension structure of the existing column 1 after the concrete is poured.
[0063] Specifically, such as Figure 1 , Figure 2 As shown, in this embodiment, multiple annular ribs 3 are arranged along the direction away from the existing column 1 and along the height direction of the existing column 1. The multiple annular ribs 3 are integrally formed into a hollow cylinder. The stirrups 8 are wrapped around the periphery of the multiple annular ribs 3, that is, wrapped around the entire circumference of the side wall of the hollow cylinder. The multiple annular ribs 3 are wrapped in this way to improve the integrity of the multiple annular ribs 3.
[0064] In some embodiments, such as Figure 1 , Figure 2 As shown, the connection node between the new beam and the existing column also includes multiple through bars 9, of which two through bars 9 are set on the same horizontal plane, and one end of the two through bars 9 on the same side passes through the ring bar 3 and avoids the existing column 1 respectively, and the other end of the two through bars 9 on the same side is arranged crosswise; concrete can be poured on the other end of the two through bars 9 on the same side and on the longitudinal reinforcement 4 of the new beam to form the new beam 5.
[0065] In the above embodiment, multiple through bars 9 are set and poured together with the longitudinal reinforcement 4 of the new beam to form a new beam 5, so as to ensure the continuous transmission of bending moment at the connection node between the new beam and the existing column.
[0066] Specifically, such as Figure 1 , Figure 2 As shown, in this embodiment, the through bar 9 is fixedly connected to the uppermost annular bar 3; the diameter of the through bar 9 is the same as the diameter of the maximum longitudinal bar of the newly added beam 5.
[0067] In some embodiments, such as Figure 1 , Figure 2 As shown, column 1 is a square column, and the innermost annular rib 3 abuts against the edge of the square column.
[0068] In the above embodiment, the innermost annular rib 3 of the existing column 1, which is a square column, abuts against the edge of the square column to ensure the connection stability of the annular rib 3.
[0069] In some embodiments, such as Figure 1 , Figure 2 As shown, a clearance 10 is formed between the outer surface of the square column and the innermost annular reinforcement 3; the connection node between the new beam and the existing column also includes a filler reinforcement 11, which is located in the clearance 10.
[0070] In the above embodiment, when the existing column 1 is set as a square column, the filling reinforcement 11 is set in the void 10 to improve the integrity of the internal steel reinforcement structure of the connection node between the new beam and the existing column, and further improve the structural stability of the connection node between the new beam and the existing column.
[0071] Specifically, such as Figure 1 , Figure 2 As shown, the clearance 10 formed between the outer surface of the square column and the innermost annular rib 3 is crescent-shaped. The filling rib 11 includes additional long ribs 12 and additional short ribs 13. Multiple additional long ribs 12 are arranged in parallel and distributed along the length of the clearance 10; multiple additional short ribs 13 are provided and are spaced apart between adjacent additional long ribs 12.
[0072] In some embodiments, such as Figure 1 , Figure 2 As shown, column 1 is designed as a circular column, and the innermost annular rib 3 is attached to the outer surface of the circular column.
[0073] In the above embodiment, the innermost annular rib 3 of the existing column 1, which is a circular column, is attached to the outer surface of the circular column to ensure the connection stability of the annular rib 3.
[0074] According to an embodiment of the present invention, another aspect provides a construction method for a new beam-existing column connection node, used for constructing the new beam-existing column connection node described in the above embodiment. The construction method includes the following steps:
[0075] Step S1: Chisel away the area at the junction of the new circumferential beam 5 and the existing column 1, remove the protective layer of the existing column 1, and expose the supporting reinforcement inside the existing column 1.
[0076] Step S2: Open holes at the chiseling location of the existing column 1, and make the holes avoid the longitudinal reinforcement inside the existing column 1.
[0077] Step S3: Set the connecting rib 2 in the hole, and make at least a portion of the connecting rib 2 extend out of the hole;
[0078] Step S4: Install annular reinforcement 3 around the existing column 1, and fix the annular reinforcement 3 to the part of the connecting reinforcement 2 that extends out of the hole;
[0079] Step S5: Fix the newly added longitudinal reinforcement 4 of the beam to the ring reinforcement 3;
[0080] Step S6: Pour concrete onto the connecting reinforcement 2 and the ring reinforcement 3 to form a ring beam;
[0081] Step S7: Pour concrete onto the longitudinal reinforcement 4 of the new beam to form the new beam 5.
[0082] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by this application.
Claims
1. A new beam and existing column connection joint, characterized in that, include: There is an existing column (1) with recessed holes along its circumference; A connecting rib (2) is provided in the hole, and at least a portion of the connecting rib (2) extends out of the hole; A ring-shaped rib (3) is provided on the periphery of the existing column (1) and is fixedly connected to the part of the connecting rib (2) that extends out of the hole. The longitudinal reinforcement (4) of the new beam is fixedly connected to the ring reinforcement (3), and concrete can be poured on the longitudinal reinforcement (4) of the new beam to form the new beam (5); A concrete layer (6) is formed on the connecting bar (2), the ring bar (3) and the longitudinal reinforcement (4) of the new beam, so that the new beam (5) is formed on the existing column (1).
2. The new beam-to-existing column connection node of claim 1, wherein, The existing column (1) has a groove (7) formed in the circumference. The groove (7) is formed by chiseling inward from at least a portion of the existing column (1) in the circumference and exposing the supporting ribs inside the existing column (1). The hole is located in the slot (7) and avoids the support ribs inside the existing column (1).
3. The connection joint of claim 1 or 2, wherein, The holes are provided in multiple directions along the circumference of the existing column (1); And / or, the holes are provided in multiple directions along the height of the existing column (1).
4. The connection joint of claim 1, wherein, The annular reinforcement (3) is provided in multiple directions away from the existing column (1); And / or, the annular reinforcement (3) is provided in multiple directions along the height of the existing column (1).
5. The new beam-to-existing column connection of claim 4, wherein, It also includes stirrups (8) that are arranged around the periphery of the plurality of annular bars (3), and the plurality of stirrups (8) are arranged at circumferential intervals along the annular bars (3).
6. The new beam-to-existing column connection of claim 1, wherein, It also includes multiple through bars (9), two of which are set on the same horizontal plane, and one end of the two through bars (9) on the same side passes through the ring bar (3) and avoids the existing column (1), and the other ends of the two through bars (9) on the same side are arranged crosswise. Concrete can be poured onto the other end of the two through bars (9) on the same side and onto the longitudinal reinforcement (4) of the new beam to form the new beam (5).
7. The new beam-to-existing column connection node according to any one of claims 1-2, 4-6, wherein, The existing column (1) is a square column, and the innermost annular rib (3) abuts against the edge of the square column.
8. The new beam-to-existing column connection node of claim 7, wherein, An open space (10) is formed between the outer surface of the square column and the innermost annular rib (3); The connection node between the new beam and the existing column also includes a filler bar (11), which is located in the void (10).
9. The new beam-to-existing column connection of any one of claims 1-2, 4-6, wherein, The existing column (1) is a circular column, and the innermost annular rib (3) is attached to the outer surface of the circular column.