Structure transformation node structure of frame structure

Abstract

The utility model relates to a structure transformation node structure of a frame structure, which comprises a frame column and a transformation beam arranged on one side of the frame column, and at least one row of beam end support ribs, at least one row of beam bottom longitudinal ribs and a plurality of stirrups are arranged in the transformation beam; the parts, close to the frame column, of the beam end support ribs located in the transformed beam are cut off to form cut-off gaps, newly-added ribs are arranged at any number of cut-off gaps, and the two ends of the newly-added ribs are connected with the beam end support ribs at the two ends of the cut-off gaps respectively; according to the utility model, the beam end support ribs of the to-be-transformed beam are cut off, and any number of beam end support ribs are reconnected through the newly added ribs, so that the hogging moment value which can be borne by the beam end is controlled and reduced, and the hogging moment value is calculated and rechecked through structural analysis software without reinforcing a frame column; according to the method, the calculation requirement can be met only by transforming the transformation beam, the anti-seismic concept of strong columns and weak beams is met, construction is convenient, and due to the fact that the reinforcing workload is reduced, the construction time and the construction cost can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of building frame structures, in particular to a structural transformation node structure of a frame structure. Background Art

[0002] In the reconstruction of frame structures, some frame beams need to be removed to meet the requirements of local large spaces. After the removal, the original structure's middle column, which was under small eccentric compression or axial compression, becomes a side column under large eccentric compression. The longitudinal reinforcement of the middle column under small eccentric compression or axial compression is basically structural reinforcement, and the side column under large eccentric compression is mainly reinforced by bending calculation. The conventional reinforcement plan is to model and verify and reinforce the actual reinforcement and structural conditions of the beams and columns that have been constructed. After analysis and research, this seemingly reasonable conventional treatment method has the following points that are worth discussing:

[0003] Due to the demolition of the frame beam, the continuous span middle support of the beam is changed to side support, the constraint of the column on the beam becomes weaker, and the longitudinal reinforcement of the beam end of the original frame beam is too large, which exceeds the model calculation results after demolition, resulting in strong beams and weak columns, which is not conducive to earthquake resistance.

[0004] In order to avoid the adverse effects of strong beams and weak columns, it is necessary to strengthen the seismic bearing capacity of frame columns. Since the original frame columns are under small eccentric compression or axial compression, their reinforcement is relatively small, which can easily cause a significant increase in the reinforcement cost.

[0005] Even if the frame beams and columns are treated according to the actual situation, for the overall structure, this treatment method of excessively strengthening individual components is not conducive to the comprehensive seismic performance of the overall structure, especially for high-intensity areas.

[0006] When encountering projects where it is inconvenient to reinforce frame columns, conventional solutions are not applicable.

[0007] Therefore, it is necessary to consider a structural renovation node structure that conforms to the seismic resistance concept of "strong columns and weak beams" of the frame structure. Utility Model Content

[0008] Based on the above description, the utility model provides a structural transformation node structure of a frame structure, which is constructed conveniently, reduces reinforcement workload, and greatly reduces construction time and construction costs by cutting off the beam end support bars of the modified beam that needs to be modified, and reconnecting any number of the beam end support bars through newly added bars.

[0009] The utility model solves the above technical problems with the following technical solutions: a structural reconstruction node structure of a frame structure, comprising a frame column and a reconstruction beam arranged on one side of the frame column, wherein the reconstruction beam is provided with at least one row of beam end support bars, at least one row of beam bottom longitudinal bars and a plurality of stirrups; the beam end support bars are arranged at the top of the reconstruction beam, the beam bottom longitudinal bars are arranged at the bottom of the reconstruction beam, the beam end support bars and the beam bottom longitudinal bars are both passed through or anchored in the frame column, and the beam end support bars and the beam bottom longitudinal bars in each row are both horizontally arranged at the same height, and the stirrups are vertically arranged and used to connect the beam end support bars and the beam bottom longitudinal bars;

[0010] The beam end support reinforcement located in the modified beam is cut off near the frame column to form a truncation gap, wherein any number of the truncation gaps are provided with new reinforcements, and the two ends of the new reinforcements are respectively connected to the beam end support reinforcements at the two ends of the truncation gaps.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the newly added reinforcement is located at the truncation gap of the top row of beam end support reinforcements.

[0013] Furthermore, the newly added reinforcement is located at the truncation gaps of at least two rows of beam end support reinforcements at the top.

[0014] Furthermore, the diameter of the newly added reinforcement is smaller than the diameter of the beam end support reinforcement.

[0015] Furthermore, both ends of the newly added reinforcement are connected to the beam end support reinforcement by single-sided welding.

[0016] Furthermore, the single-sided welding length between each end of the newly added reinforcement and the beam end support reinforcement is greater than or equal to 16 times the diameter of the newly added reinforcement.

[0017] Furthermore, one end of the top of the modified beam close to the frame column is removed to form a reduction portion, and the cut-off gap and the newly added reinforcement are arranged in the reduction portion.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0019] The utility model controls and reduces the negative bending moment value that the beam end can withstand by cutting off the beam end support bars of the modified beam that needs to be modified, and reconnects any number of the beam end support bars through newly added bars. Through calculation and verification by structural analysis software, there is no need to reinforce the frame columns, and only the modified beams need to be modified to meet the calculation requirements. In addition, it complies with the anti-seismic concept of "strong columns and weak beams". The construction is convenient, and the construction time and construction cost can be greatly reduced due to the reduction in reinforcement workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure before the frame structure is modified in the embodiment of the utility model;

[0021] Figure 2 A schematic diagram of a structural transformation node structure of a frame structure provided by an embodiment of the utility model;

[0022] Figure 3 for Figure 2 A structural diagram from another perspective;

[0023] Figure 4 This is a schematic diagram of the welding structure of the newly added ribs in the embodiment of the utility model;

[0024] Figure 5 This is a structural schematic diagram of the embodiment of the utility model after the frame structure is transformed;

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Frame column; 2. Modified beam; 2', frame beam; 21. Reduction part; 3. Beam end support reinforcement; 31. Cut-off gap; 4. Beam bottom longitudinal reinforcement; 5. Stirrups; 6. New reinforcement. DETAILED DESCRIPTION

[0027] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0029] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0030] A structural transformation node structure of a frame structure is used to transform a middle column in a state of small eccentric compression or axial compression into a side column in a state of large eccentric compression.

[0031] like Figure 1 As shown, before the reconstruction, the original frame structure includes a frame column 1 and two frame beams 2' respectively arranged on both sides of the frame column 1. The frame column 1 is in a state of small eccentric compression or axial compression, and the longitudinal reinforcement is basically structural reinforcement. In order to meet the owner's local large space requirements, it is necessary to remove the frame beam 2' on one side, so that the frame column 1 is only provided with a frame beam 2' on one side. At this time, the frame column 1 is in large eccentric compression, and the bending calculation reinforcement is mainly required, so reinforcement is required.

[0032] The node structure of this embodiment is as follows Figure 2 and Figure 3 As shown, after the frame beam 2' on one side is removed, only one side of the frame column 1 is provided with a modified beam 2. At least one row of beam end support bars 3, at least one row of beam bottom longitudinal bars 4 and a plurality of stirrups 5 are provided in the modified beam 2. The beam end support bars 3 are provided at the top of the modified beam 2, and the beam bottom longitudinal bars 4 are provided at the bottom of the modified beam 2. The beam end support bars 3 and the beam bottom longitudinal bars 4 both pass through the frame column 1 and the modified beam 2, and the beam end support bars 3 and the beam bottom longitudinal bars 4 in each row are horizontally provided at the same height, and the stirrups 5 are vertically provided and used to connect the beam end support bars 3 and the beam bottom longitudinal bars 4.

[0033] The top end of the modified beam 2 near the frame column 1 is removed to form a cut-off portion 21, and the beam end support ribs 3 all pass through the cut-off portion 21, so that the beam end support ribs 3 are partially exposed. The beam end support ribs 3 located in the cut-off portion 21 are cut off to form a cut-off gap 31. Among them, new ribs 6 are provided at any number of the cut-off gaps 31, and the two ends of the new ribs 6 are respectively connected to the beam end support ribs 3 at the two ends of the cut-off gap 31 by single-sided welding, such as Figure 4 As shown, the single-sided welding length L between each end of the newly added rib 6 and the beam end support rib 3 is greater than or equal to 16d, where d is the diameter of the newly added rib 6.

[0034] The diameter of the newly added reinforcement 6 is smaller than the diameter of the beam end support reinforcement 3 . The diameter of the newly added reinforcement 6 is calculated according to the demand, and the utility model does not impose any limitation thereto.

[0035] Preferably, the newly added reinforcement 6 is only arranged at the cut-off gap 31 of the top row of beam end support reinforcement 3, and as Figure 3 As shown, it is not necessary to provide all the new reinforcements 6 and connect them at the truncation gaps 31 of the top row of beam end support reinforcements 3.

[0036] The number of newly added ribs 6 is also calculated based on demand, and the utility model does not impose any restrictions. By changing the diameter and number of newly added ribs 6, the value of the negative bending moment that the beam end can withstand can be controlled, thereby meeting the reinforcement requirements. In addition, when necessary, newly added ribs 6 can also be set and connected at the truncation gap 31 of the beam end support ribs 3 in the second row from top to bottom, or newly added ribs 6 can continue to be set in the third row and below, and the utility model does not impose any restrictions. However, preferably, in this embodiment, newly added ribs 6 are only set and connected at the truncation gap 31 of the beam end support ribs 3 in the top row.

[0037] After the welding of the newly added reinforcement 6 is completed, the cut portion 21 is chiseled and cleaned, and then cement slurry is applied and concrete is poured to complete the transformation of the frame structure. Figure 5 shown.

[0038] The utility model controls and reduces the negative bending moment value that the beam end can withstand by cutting off the beam end support ribs 3 of the modified beam 2 that needs to be modified, and reconnects any number of the beam end support ribs 3 through the newly added ribs 6. Through calculation and verification by structural analysis software, there is no need to reinforce the frame column 1, and only the modified beam 2 needs to be modified to meet the calculation requirements. In addition, it complies with the anti-seismic concept of "strong column and weak beam". The construction is convenient, and the construction time and construction cost can be greatly reduced due to the reduction in reinforcement workload.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A structural transformation node structure of a frame structure, characterized in that: The invention comprises a frame column and a modified beam arranged at one side of the frame column, wherein the modified beam is provided with at least one row of beam end support bars, at least one row of beam bottom longitudinal bars and a plurality of stirrups; the beam end support bars are arranged at the top of the modified beam, the beam bottom longitudinal bars are arranged at the bottom of the modified beam, the beam end support bars and the beam bottom longitudinal bars are both passed through or anchored to the frame column, and the beam end support bars and the beam bottom longitudinal bars in each row are both horizontally arranged at the same height, and the stirrups are vertically arranged and used to connect the beam end support bars and the beam bottom longitudinal bars; The beam end support reinforcement located in the modified beam is cut off near the frame column to form a truncation gap, wherein any number of the truncation gaps are provided with new reinforcements, and the two ends of the new reinforcements are respectively connected to the beam end support reinforcements at the two ends of the truncation gaps.

2. The structural transformation node structure of a frame structure according to claim 1, characterized in that: The newly added reinforcement is located at the cut-off gap of the top row of beam end support reinforcements.

3. The structural transformation node structure of a frame structure according to claim 2, characterized in that: The newly added reinforcement is located at the truncation gaps of at least two rows of beam end support reinforcements at the top.

4. The structural transformation node structure of a frame structure according to claim 1, characterized in that: The diameter of the newly added reinforcement is smaller than the diameter of the beam end support reinforcement.

5. The structural transformation node structure of a frame structure according to claim 1, characterized in that: Both ends of the newly added reinforcement are connected to the beam end support reinforcement by single-sided welding.

6. The structural transformation node structure of a frame structure according to claim 5, characterized in that: The single-sided welding length between each end of the newly added reinforcement and the beam end support reinforcement is greater than or equal to 16 times the diameter of the newly added reinforcement.

7. The structural transformation node structure of a frame structure according to claim 1, characterized in that: The end of the top of the modified beam close to the frame column is removed to form a reduction portion, and the cut gap and the newly added reinforcement are arranged in the reduction portion.

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