Reinforcing structure and reinforcing method for old embedded part

Abstract

The invention discloses a reinforcing structure and method utilizing an old embedded part. The old embedded part is arranged in a concrete structure. The reinforcing structure comprises embedded steel bar embedded parts, the embedded steel bar embedded parts are mainly composed of embedded steel bar parts and steel plate parts, the steel plate parts cover and are fixedly connected to the outer connecting surfaces of the old embedded parts, one ends of the embedded steel bar parts are perpendicularly and fixedly connected with the steel plate parts, and the other ends of the embedded steel bar parts are embedded in the concrete structure and are evenly arranged on the peripheries of the old embedded parts. According to the method, damage to the concrete structure caused by dismantling of the embedded part can be avoided, safety and reliability of the original structure can be guaranteed, it can be guaranteed that the bearing capacity meets the requirement after reinforcement, and construction is economical and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering construction methods, and in particular to a reinforcement structure and a reinforcement method for reusing old embedded parts. Background Art

[0002] It is well known that an effective way to connect a steel structure and a concrete structure is to set embedded parts in the concrete, embed the embedded parts in the concrete structure during construction, and weld the steel structure to the embedded parts during installation so that the load can be reliably transferred to the concrete structure through the embedded parts.

[0003] At present, the heating pipe bracket of cast-in-place reinforced concrete structure has embedded parts for the subsequent welding of support brackets. As the parameters of the heating pipe change, the load of its support point also changes, and it is necessary to change the structure and bearing capacity of the original embedded parts in the design. Since the embedded parts are embedded in the surface of the concrete structure, if they are removed and new embedded parts are added, it may cause damage to the original concrete structure and the construction is difficult.

[0004] Therefore, it is urgent to consider a reinforcement measure that can utilize old embedded parts, and the reinforced embedded parts meet the new bearing capacity requirements.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0006] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the present invention proposes a reinforcement structure and a reinforcement method for reusing old embedded parts, which can avoid the damage to the concrete structure caused by removing the embedded parts, ensure the safety and reliability of the original structure, and ensure that the bearing capacity after reinforcement meets the requirements, and the construction is economical and convenient.

[0007] According to a reinforcement structure of reusing embedded parts of the present invention, the embedded parts are arranged in a concrete structure; the reinforcement structure includes embedded rebar parts, which are mainly composed of a rebar part and a steel plate part, the steel plate part covers and is fixedly connected to the outer connection surface of the embedded parts, one end of a plurality of rebar parts is vertically fixedly connected to the steel plate part, and the other end is rebar-embedded in the concrete structure and evenly arranged on the periphery of the embedded parts.

[0008] According to some embodiments of the present invention, the embedded rebar component also includes a reserved hole opened at the center of the steel plate portion, the embedded component includes an anchor plate and anchor bars connected in one piece, and the steel plate portion and the anchor plate are fixedly connected at the reserved hole by a fillet weld.

[0009] According to some embodiments of the present invention, the reserved orifice is configured as a reserved circular hole.

[0010] According to some embodiments of the present invention, the embedded reinforcement portion and the steel plate portion are connected by a perforated plug weld.

[0011] According to some embodiments of the invention, the concrete structure is configured as a reinforced concrete column.

[0012] A reinforcement method for reusing old embedded parts according to the present invention comprises the following steps:

[0013] The above-mentioned embedded steel bars are constructed on the original reinforced concrete structure and embedded parts to obtain reinforced embedded parts;

[0014] Recalculate the bearing capacity of reinforced embedded parts.

[0015] According to some embodiments of the present invention, the bearing capacity of the reinforced embedded parts is checked and calculated, specifically including:

[0016] Under the action of axial tension, the bearing capacity of the first embedded part after reinforcement should meet Where n is the total number of implanted reinforcement parts, is the design value of the tensile bearing capacity of the embedded steel, and N is the tensile bearing capacity of the embedded parts;

[0017] Under the action of bending moment, the bearing capacity of the reinforced second embedded part should meet ,in is the total number of rebars on one side, is the spacing between the two rows of rebars on the opposite sides, is the bending bearing capacity of the embedded parts;

[0018] Under the action of eccentric tension, the bearing capacity of the reinforced third embedded part should meet , ,in is the tensile bearing capacity of the embedded reinforcement parts, is the bending bearing capacity of the embedded reinforcement parts;

[0019] Under the action of shear force, the bearing capacity of the fourth embedded part after reinforcement should meet ,in is the shear bearing capacity of the old embedded parts, It is the shear bearing capacity of embedded reinforcement parts.

[0020] According to the reinforcement structure and reinforcement method of the present invention, by adding a reinforcement structure of embedded parts, the original embedded parts can be used to avoid damage to the concrete structure caused by removing the embedded parts. On the other hand, for the part of the embedded parts with insufficient bearing capacity, the reinforcement method of the present invention can be used to verify the bearing capacity. This not only ensures the safety and reliability of the original structure, but also achieves the convenience and economy of construction.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 This is a front view of a reinforcement structure for reusing embedded parts according to an embodiment of the present invention.

[0024] Figure 2 This is an AA cross-sectional view of a reinforcement structure of a reused embedded part according to an embodiment of the present invention.

[0025] Figure 3 This is a bending bearing capacity diagram of a rebar embedded part in a reinforcement method for reusing a pre-embedded part according to an embodiment of the present invention.

[0026] Figure 4 This is a diagram of the eccentric tensile bearing capacity of embedded rebar parts in a reinforcement method for reusing old embedded parts according to an embodiment of the present invention.

[0027] Meaning of reference numerals in the figure:

[0028] 100-Reinforced structure;

[0029] 110-embedded steel bar; 1101-embedded steel bar portion; 1102-steel plate portion; 1102-1-reserved hole; 1102-2-piercing plug weld; 1103-fillet weld;

[0030] 200-Old embedded parts;

[0031] 210-anchor plate;

[0032] 220-anchor reinforcement;

[0033] 300-Concrete structure. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Example 1

[0039] like Figure 1 and Figure 2 As shown, Embodiment 1 of the present invention provides a reinforcement structure 100 that utilizes a used embedded part 200, and the embedded part is arranged in a concrete structure 300; the reinforcement structure 100 includes a rebar embedded part 110, and the rebar embedded part 110 is mainly composed of a rebar embedded part 1101 and a steel plate part 1102, and the steel plate part 1102 covers the outer connection surface of the embedded part, and one end of a plurality of rebar embedded parts 1101 is vertically fixedly connected to the steel plate part 1102, and the other end is rebar embedded in the concrete structure 300 and evenly arranged on the periphery of the embedded part.

[0040] In Example 1 of the present invention, the embedded rebar 110 also includes a reserved hole 1102-1 opened at the center of the steel plate portion 1102, and the embedded part includes an anchor plate 210 and an anchor bar 220 connected together. The steel plate portion 1102 and the anchor plate 210 are connected at the reserved hole 1102-1 through a corner weld 1103.

[0041] It is not difficult to understand that the design of the reserved hole 1102 - 1 is to fix the embedded part 110 with the embedded part, so as to make use of the old embedded part 200 .

[0042] Exemplarily, considering the convenience of opening a hole, the reserved opening 1102 - 1 in Embodiment 1 of the present invention may preferably be configured as a reserved circular hole, but is not limited to any other shape.

[0043] In Example 1 of the present invention, the embedded bar portion 1101 and the steel plate portion 1102 can be fixedly connected by a perforated plug weld 1102-2.

[0044] For example, the concrete structure 300 in Example 1 of the present invention can be configured as a reinforced concrete column. When the concrete structure 300 corresponds to a heating pipe support, the concrete structure 300 can be specifically set as a reinforced concrete column, and the reinforced embedded parts of the embodiment 1 of the present invention are set in the reinforced concrete column to meet the new support point load requirements. However, it is not limited to this. The concrete structure 300 in Example 1 of the present invention can also be expanded to other application scenarios that require the connection of steel structure and concrete structure 300, such as a construction pipe gallery, etc.

[0045] Example 2

[0046] Reference Figures 1 to 4 Embodiment 2 of the present invention further provides a method for reinforcing a reused embedded part 200, comprising the following steps:

[0047] 1) constructing the above-mentioned embedded parts 110 on the original reinforced concrete structure 300 and embedded parts to obtain reinforced embedded parts;

[0048] 2) Recalculate the bearing capacity of the reinforced embedded parts.

[0049] In Example 2 of the present invention, the specific method of step 1) can be: first, the rebar embedding part 1101 of the rebar embedding embedded part 110 is implanted into the concrete structure 300, specifically, a circle of rebar embedding part 1101 is evenly placed on the outside of the embedded part; then, the rebar embedding part 1101 and the steel plate part 1102 with a reserved circular hole are connected by a perforated plug weld 1102-2, and at the same time, the steel plate part 1102 covers the anchor plate 210 of the embedded part and the two are connected by a fillet weld 1103 at the reserved circular hole.

[0050] In the second embodiment of the present invention, the method for calculating the bearing capacity of the embedded parts after reinforcement in step 2) can be derived according to the "Concrete Structure Design Standard" GB / T50010-2010 and the "Technical Code for Post-Anchorage of Concrete Structures" JGJ145-2013.

[0051] According to Section 9.7 of the "Concrete Structure Design Standard" GB / T50010-2010, the bearing capacity of embedded parts is divided into shear bearing capacity V, tensile bearing capacity N and bending bearing capacity M.

[0052] The bearing capacity of the newly added embedded reinforcement 110 part:

[0053] When the anchorage depth design value of the anchor bolt meets When the anchor bar yields, it will not be pulled out of the concrete. The failure mode is anchor bar tensile failure. The design value of anchor bar tensile bearing capacity is The on-site inspection method and assessment standard for anchor bearing capacity shall be carried out in accordance with Appendix C of Technical Code for Post-Anchorage of Concrete Structures JGJ145-2013, where the load test value for non-destructive inspection is The bearing capacity can be used for subsequent design only after the test results are evaluated as qualified.

[0054] When the anchorage depth design value of the anchor That is, the anchor bar is pulled out of the concrete before yielding. The failure mode is concrete cone tensile failure, concrete splitting failure or mixed failure. According to the Technical Code for Post-Anchorage of Concrete Structures JGJ145-2013 Table 4.3.10: The anchorage bearing capacity partial factors of the three anchorage failure types for non-structural components are Assuming that the ultimate bond strength of the embedded steel bar is uniformly distributed with depth, the design value of the tensile bearing capacity of the embedded steel bar is proportional to the embedded steel bar depth, which is The on-site inspection method and assessment standard for anchor bearing capacity shall be carried out in accordance with Appendix C of Technical Code for Post-Anchorage of Concrete Structures JGJ145-2013, where the load test value for non-destructive inspection is , Standard value of non-steel material destructive bearing capacity The bearing capacity can be used for subsequent design only after the test results are evaluated as qualified.

[0055] Article 5.1.5 of the Technical Code for Post-anchorage of Concrete Structures JGJ145-2013 stipulates that the internal force of the anchor connection should be calculated in accordance with the provisions of the ultimate bearing capacity state of the current national standard "Code for Design of Concrete Structures" GB50010, but no specific formula is given. The basic assumption for calculating the internal force of the anchor connection based on the formula is to take the plane where the steel plate and the beam are in contact as the normal section in the "Code for Design of Concrete Structures" and the anchor is taken as the longitudinal reinforcement. The cross-sectional strain remains flat when subjected to force. The tensile strength of concrete is not considered. In general, anchor embedded parts 110 are all symmetrical anchors.

[0056] Exemplarily, step 2) of embodiment 2 of the present invention performs a bearing capacity recheck calculation on the reinforced embedded parts, specifically including:

[0057] Under the action of axial tension, the bearing capacity of the embedded reinforcement 110 should meet , then the bearing capacity of the first embedded part after reinforcement should meet ,in is the total number of reinforcing bar implants 1101, is the design value of tensile bearing capacity of embedded steel, is the tensile bearing capacity of the embedded parts;

[0058] Reference Figure 3 Under the action of bending moment, the bearing capacity of the embedded reinforcement 110 should meet , then the bearing capacity of the second embedded part after reinforcement should meet ,in is the total number of rebars on one side, is the spacing between the two rows of rebars on the opposite sides, is the bending bearing capacity of the embedded parts;

[0059] Reference Figure 4 , under the action of eccentric tension, , , the bearing capacity of the embedded steel bar 110 should meet , then the bearing capacity of the third embedded part after reinforcement should meet , ,in is the tensile bearing capacity of the embedded reinforcement 110, is the bending bearing capacity of the embedded reinforcement 110;

[0060] Under the action of shear force, the "Concrete Structure Design Code" does not clearly stipulate the shear strength of steel bars. The conversion relationship of the design value of steel shear strength in the "Steel Structure Design Code" is , considering the reduction of the design value of shear strength when the embedded reinforcement does not reach the design value of embedded reinforcement depth , the bearing capacity of the embedded steel bar 110 should meet , then the bearing capacity of the fourth embedded part after reinforcement should meet ,in is the shear bearing capacity of the old embedded part 200, is the shear bearing capacity of the embedded reinforcement 110.

[0061] The present invention provides a reinforcement structure 100 and a reinforcement method for reusing a pre-embedded part 200. By newly setting a rebar embedded part 110 on the outside of the embedded part, the rebar embedded part 110 is implanted into a concrete structure 300, and the rebar embedded part 110 is covered on the embedded part and fixedly connected. This achieves structural reinforcement on the basis of the original embedded part, avoids damage to the concrete structure 300 caused by removing the embedded part, and takes into account the convenience and economy of construction. In addition, according to the reinforcement method, the bearing capacity of the reinforced embedded part is verified to meet new usage requirements.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications and equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A reinforcement structure for reusing pre-embedded parts, wherein the pre-embedded parts are arranged in a concrete structure; characterized in that: The reinforcement structure includes embedded rebar parts, which are mainly composed of a rebar embedding part and a steel plate part. The steel plate part covers and is fixedly connected to the outer connection surface of the embedded part. One end of a plurality of rebar embedding parts is vertically fixedly connected to the steel plate part, and the other end is embedded in the concrete structure and evenly arranged on the periphery of the embedded part.

2. The reinforcement structure of the reused embedded parts according to claim 1 is characterized in that: The embedded component further includes a reserved hole opened at the center of the steel plate portion, the embedded component includes an anchor plate and anchor bars connected in one piece, and the steel plate portion and the anchor plate are fixedly connected at the reserved hole by a fillet weld.

3. The reinforcement structure of the reused embedded parts according to claim 2 is characterized in that: The reserved orifice is configured as a reserved circular hole.

4. The reinforcement structure of the reused embedded parts according to claim 1, 2 or 3, characterized in that: The reinforcing bar portion and the steel plate portion are connected via a perforated plug weld.

5. The reinforcement structure of the reused embedded parts according to claim 4 is characterized in that: The concrete structure is configured as reinforced concrete columns.

6. A reinforcement method for reusing old embedded parts, characterized in that: The following steps are involved: Constructing the embedded steel bar parts according to any one of claims 1 to 5 on the original reinforced concrete structure and embedded parts to obtain reinforced embedded parts; The bearing capacity of the reinforced embedded parts is recalculated.

7. The reinforcement method according to claim 6, characterized in that: The bearing capacity of the reinforced embedded parts is recalculated, specifically including: Under the action of axial tension, the bearing capacity of the first embedded part after reinforcement should meet ,in is the total number of implanted reinforcement parts, is the design value of tensile bearing capacity of embedded steel, is the tensile bearing capacity of the embedded parts; Under the action of bending moment, the bearing capacity of the reinforced second embedded part should meet ,in is the total number of rebars on one side, is the spacing between the two rows of rebars on the opposite sides, is the bending bearing capacity of the embedded parts; Under the action of eccentric tension, the bearing capacity of the reinforced third embedded part should meet , ,in is the tensile bearing capacity of the embedded reinforcement parts, is the bending bearing capacity of the embedded reinforcement parts; Under the action of shear force, the bearing capacity of the fourth embedded part after reinforcement should meet ,in is the shear bearing capacity of the old embedded parts, It is the shear bearing capacity of embedded reinforcement parts.

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