Steel bar planting-free connecting structure for newly-added concrete wall body and existing column

Abstract

The utility model relates to an embedded-steel-bar-free connecting structure of a newly-added concrete wall body and an existing column, and belongs to the technical field of buildings. The side face section increasing columns are connected with newly-added concrete walls on the two outer sides of the existing frame column. Newly-added horizontally-distributed steel bars are arranged on the two sides of the side face section increasing column respectively, bypass the two sides of the existing frame column respectively, are anchored in the side face section increasing column in a crossed mode and then stretch into a newly-added concrete wall. The problems that according to a traditional method, the number of steel bar planting drill holes is large, and damage to a frame column of an existing structure is large are solved.

Description

Technical Field

[0001] The utility model belongs to the field of building technology, and particularly relates to a connection node between a concrete wall and a reinforced concrete frame column in the reconstruction and reinforcement of an existing building structure in the field of construction engineering, specifically a reinforcement-free connection structure between a newly added concrete wall and an existing column and a connection method thereof. Background Art

[0002] In recent years, with the prosperity and development of my country's economy, the gradual improvement and development of infrastructure, the urbanization rate has been increasing and gradually matured. The era of large-scale new construction in full swing has become a thing of the past. Urban renewal is a key measure to transform the urban development mode, promote high-quality urban development, and build a people's city. It is also an important measure to promote cities to make up for shortcomings, strengthen weaknesses, improve urban social livelihood, optimize urban public services, and improve the quality of urban living. A large number of existing buildings can no longer meet people's requirements for building environment and building use functions. The demand for transformation and upgrading of their environment or changing their use functions has greatly increased. Urban renewal promotes the renovation of existing buildings. Under certain conditions, a series of relevant measures are taken to safely, energy-saving, green, environmentally friendly, economically and reasonably extend the life and use functions of existing buildings to give full play to their potential. The working goal of existing building renovation technology work can be simply summarized as improving the living environment, protecting and improving people's livelihood, and the focus of work is to effectively improve the overall level of existing building renovation technology work through the comprehensive improvement of key technologies for existing building renovation.

[0003] In the current building structure renovation and reinforcement projects, one situation is to add concrete walls by changing the building structure system for reinforcement. For existing frame structures, if the lateral stiffness is too small and the seismic resistance is insufficient after the building renovation, the building height exceeds the limit, and the building seismic fortification category is improved, a certain number of concrete walls need to be added to improve the lateral stiffness and seismic resistance of the structure to meet the structural concept of multiple defenses in relevant standards. Another situation is to add concrete walls without changing the building structure system for reinforcement. For existing frame-seismic walls, due to the adjustment of building functions, the lateral stiffness and seismic resistance are insufficient, the building height exceeds the limit, and the building seismic fortification category is improved, a certain number of concrete walls need to be added to improve the lateral stiffness and seismic resistance of the structure; for existing frame structures and frame-seismic wall structures, concrete walls are added to add a pool in the basement due to the adjustment of building functions.

[0004] The connection between the newly added concrete wall and the existing frame columns and frame beams is usually connected by embedding reinforcement. Since the concrete wall has more horizontal and vertical distribution bars, the amount of embedding reinforcement drilling is large, which causes greater damage to the frame columns of the existing structure. In order to reduce the amount of embedding reinforcement drilling and avoid excessive damage to the cross-section of the original frame beams and columns, equal-generation connecting bars can be used. Regardless of whether all wall steel bars are embedded or equal-generation connecting bars are embedded, it is necessary to embed reinforcement in the existing frame columns, which will cause certain damage to the cross-section of the existing frame columns. In order to reduce the impact of embedding reinforcement on the damage to the cross-section of the existing frame columns, no reinforcement is embedded in the frame columns, reducing the embedding workload of the reinforcement project. For this reason, it is necessary to design a connection reinforcement node between the newly added concrete wall and the existing frame columns to meet the requirements of building structure renovation and reinforcement. Utility Model Content

[0005] The technical problem to be solved by the utility model is that, in the building structure renovation and reinforcement project, for the connection reinforcement node between the newly added concrete wall and the existing frame column, in order to reduce the damage effect of the newly added concrete wall reinforcement drilling on the existing frame column section and reduce the reinforcement workload of the reinforcement project, a connection reinforcement structure is designed to make the newly added concrete wall and the existing frame column reliable in force transmission, reasonable in force, and solve the practical application of the project. One purpose of the utility model is to provide a connection structure between a newly added concrete wall and an existing column without reinforcement, and another purpose of the utility model is to provide a connection method thereof.

[0006] Technical solutions adopted:

[0007] A reinforcement-free connection structure between a newly added concrete wall and an existing column, comprising an existing frame column, a newly added concrete wall, newly added horizontally distributed steel bars and a side column with an increased cross section. The characteristics are:

[0008] Side columns with increased cross-section are arranged outside the existing frame columns.

[0009] The side columns with enlarged cross-section connect the newly added concrete walls on both sides outside the existing frame columns.

[0010] Multiple layers of newly added horizontal distributed steel bars are respectively provided on both sides of the side section-enlarged column. Each layer of newly added horizontal distributed steel bars bypasses the two sides of the existing frame column and is cross-anchored in the side section-enlarged column to form anchor points A and anchor points B on both sides. Then the newly added horizontal distributed steel bars extend into the newly added concrete wall.

[0011] The newly added concrete walls on both sides of the existing frame columns are arranged relative to each other or at 90 degrees.

[0012] The utility model also provides a connection method of a newly added concrete wall and an existing column without reinforcing bar connection structure.

[0013] This connection reinforcement node is designed to solve the problem that the number of reinforcement holes drilled for embedding reinforcement nodes between newly added concrete walls and existing frame columns in actual reinforcement and renovation projects is large, and the damage to the frame columns of the existing structure is serious. In order to reduce the number of reinforcement holes drilled for embedding reinforcement and avoid excessive damage to the cross-section of the original frame beams and columns, a utility model is provided, which makes the connection between the newly added concrete wall and the existing frame column reliable, the force transmission path is direct, the force is reasonable, and the construction is convenient. Connection reinforcement structure.

[0014] Its advantages are:

[0015] The design of the connection reinforcement node is reasonable. By increasing the cross-section of the existing frame column side, the problem of the anchor connection between the newly added concrete wall and the existing frame column is converted into the horizontal distribution steel bars of the newly added concrete wall being bent and connected and anchored on the side of the existing frame column. The force is directly applied and the connection and force transmission are reliable. It can effectively solve the problem of a large number of anchor drilling holes in the connection reinforcement node between the newly added concrete wall and the existing frame column in the actual reinforcement and renovation project. It can effectively reduce the amount of anchor drilling holes and avoid the problem of large damage to the frame column of the existing structure caused by a large number of anchor drilling holes. In addition, since the horizontal distribution steel bars are not anchored in the existing frame column, it is only necessary to roughen the side of the existing frame column and apply the structural interface agent to ensure the effective transmission of the shear force at the interface between the new and old concrete, which effectively reduces the anchor workload in the renovation and reinforcement project, reduces the construction difficulty, can effectively speed up the construction progress, and the construction quality is easy to control, which is economical and reasonable. Based on the above reasons, the utility model can be widely promoted and applied in the fields of connection nodes between newly added concrete walls and reinforced concrete frame columns in the renovation and reinforcement projects of existing building structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a plan layout diagram of the utility model.

[0017] Figure 2 This is a schematic diagram of the newly added horizontal distributed steel bar structure of Example 1.

[0018] Figure 3 is a schematic diagram of the structure of Example 1 ( Figure 1 (Local enlarged view of the node in the figure).

[0019] Figure 4 This is a schematic diagram of the newly added horizontal distributed steel bar structure of Example 2.

[0020] Figure 5 This is a schematic diagram of the structure of Example 2.

[0021] There are existing frame columns 1, existing concrete walls 2, newly added concrete walls 3, newly added horizontal distributed steel bars 4 (newly added horizontal distributed steel bars for concrete walls), newly added vertical distributed steel bars 5 (newly added vertical distributed steel bars for concrete walls), existing frame column longitudinal bars 6, existing frame column stirrups 7, side enlarged section columns 8, and structural interface layers 9. DETAILED DESCRIPTION

[0022] Example 1

[0023] A reinforcement-free connection structure between a newly added concrete wall and an existing column comprises an existing frame column 1, a newly added concrete wall 3, newly added horizontal distribution steel bars 4, newly added vertical distribution steel bars 5 and a side column 8 with an enlarged cross section.

[0024] A side section-enlarged column 8 is arranged outside the existing frame column 1 .

[0025] The side enlarged section column 8 is connected to the newly added concrete wall 3 opposite to the existing frame column 1.

[0026] A plurality of newly added vertically distributed steel bars 5 are arranged in the side increased cross-section columns 8 and the newly added concrete walls 3 .

[0027] Multiple layers of newly added horizontal distributed steel bars 4 are respectively provided on both sides of the side section-enlarged column 8. Each layer of newly added horizontal distributed steel bars 4 bypasses the two sides of the existing frame column 1 and is cross-anchored in the side section-enlarged column 8. Anchor points A and anchor points B are formed on both sides respectively, and then the newly added horizontal distributed steel bars 4 extend into the newly added concrete wall 3.

[0028] Furthermore, the anchor point A and the anchor point B are arranged diagonally (staggered with each other) on the side of the increased cross-section column 8 .

[0029] Furthermore, a structural interface layer 9 is provided between the side surface of the existing frame column 1 and the side increased cross-section column.

[0030] The existing concrete wall 2 and the existing frame column 1 located at the edge and the newly added concrete wall 3 are fixed by conventional methods.

[0031] The existing frame column 1 contains existing frame column longitudinal reinforcement 6 and existing frame column stirrup reinforcement 7 .

[0032] The existing frame column 1 has a square cross section, and the side enlarged cross section column 8 also has a square cross section. A circle of the same shape is enlarged on the outside of the existing frame column 1, and the two sides of each layer of newly added horizontal distribution steel bars 4 are anchored at 90°.

[0033] Example 2

[0034] Embodiment 2 is substantially the same as Embodiment 1, except that:

[0035] The newly added concrete walls 3 on both sides are not arranged on the opposite sides of the existing frame columns 1, but are arranged on the adjacent sides of the existing frame columns 1 at 90 degrees.

[0036] The anchor point A and the anchor point B are still arranged at diagonal positions on the side increased cross-section column 8 .

[0037] Example 3

[0038] A method for connecting a newly added concrete wall and an existing column without reinforcing bar connection structure comprises the following steps:

[0039] The side of the existing frame column 1 connected to the newly added concrete wall 3 is roughened and coated with a structural interface agent to form a structural interface layer 9, and then the cross-section is increased to a side increased section column 8. The thickness of the increased section on each side should not be less than 60 mm. Roughening and coating with a structural interface agent can ensure the effective transmission of shear force at the interface between the new and old concrete and reliable connection. New vertical distribution steel bars 5 and new horizontal distribution steel bars 4 are set in the side increased section column 8 and the two outer newly added concrete walls 3. Each layer of horizontal distribution steel bars 4 bypasses both sides of the side increased section column 8 and is cross-anchored in the side increased section column 8. The newly added vertical distribution steel bars 5 and the multiple layers of newly added horizontal distribution steel bars 4 are anchored at the intersection.

[0040] The utility model method does not need to embed the newly added horizontal distributed steel bars 4 of the concrete wall into the existing frame column 1, thus avoiding the large damage to the existing frame column 1 caused by embedding and drilling a large number of newly added horizontal distributed steel bars 4, and avoiding damage to the existing frame column longitudinal bars 6 and the existing frame column stirrups 7 in the existing frame column 1. Since there is no horizontal axil section in the cross-section of the side-enlarged cross-section column 8, the impact on the building space is small, and both basements and upper structures can be applied.

Claims

1. A structure for connecting a newly added concrete wall with an existing column without planting reinforcement, comprising an existing frame column (1), a newly added concrete wall (3), newly added horizontally distributed reinforcement bars (4) and a side column with an increased cross section (8); characterized in that: A side section-enlarged column (8) is arranged outside the existing frame column (1); The side enlarged section columns (8) are connected to the newly added concrete walls (3) on both sides outside the existing frame columns (1); Multiple layers of newly added horizontal distribution steel bars (4) are respectively arranged on both sides of the side section-enlarged column (8), and each layer of newly added horizontal distribution steel bars (4) bypasses both sides of the existing frame column (1) and is cross-anchored in the side section-enlarged column (8), forming anchor points A and anchor points B on both sides, respectively, and then the newly added horizontal distribution steel bars (4) extend into the newly added concrete wall (3).

2. According to claim 1, a reinforcement-free connection structure between a newly added concrete wall and an existing column is characterized in that: The newly added concrete walls (3) on both sides outside the existing frame column (1) are arranged opposite to each other.

3. According to claim 1, a reinforcement-free connection structure between a newly added concrete wall and an existing column is characterized in that: The newly added concrete walls (3) on both sides outside the existing frame column (1) are arranged at 90 degrees.

4. According to claim 1, a reinforcement-free connection structure between a newly added concrete wall and an existing column is characterized in that: The anchor point A and the anchor point B are arranged diagonally on the side of the enlarged cross-section column (8).

5. According to claim 1, a reinforcement-free connection structure between a newly added concrete wall and an existing column is characterized in that: The anchor point A and the anchor point B are intersected at 90 degrees.

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