Construction method and structure of stiff beam-column joint for updating and reconstruction of existing building
By chiseling outconcrete concrete and welding new steel beams during building renovation, the problem of connecting new and old structures is solved, the safety of existing structures and the firm combination of new and old structures is achieved, and the visual effect is met. Improvement has significant economic and social benefits.
Patent Information
- Application Number
- CN202411476784.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2024-12-24
AI Technical Summary
During the process of building renewal and renovation, the connection difficulties between the new structure and the existing structure, especially the beam and column nodes, must not only ensure the safety and stability of the existing structure, but also ensure the firm and reliable connection between the new and old structures, while also meeting the beautification of the city. Visual effects.
A strong beam and column node construction method is adopted. By chiseling outsourcing concrete outside the existing strong column, exposing the steel column, and welding between the newly built steel beam and the steel column, strengthening the plate to enhance stability and reserve holes Weld the connecting plate to restore the steel bar connection, and fill the grouting material to remove the area.
The safety risk of destroying existing strong columns is effectively avoided, and the reliable combination of existing strong columns and newly built steel beams is achieved, with significant economic and social benefits.
Smart Images
Figure CN119177789A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to building renovation and reconstruction, and in particular to a rigid beam-column node construction method and structure for renovation and reconstruction of existing buildings. Background Art
[0002] With the development of economy and population growth, the urbanization process is accelerating, resulting in the gradual shortage of available space in cities. Many old and old urban areas in cities are in urgent need of renewal and reconstruction because of their long-standing construction history and relatively outdated infrastructure. By improving infrastructure, improving building quality, increasing public space, and optimizing transportation and environment, we can increase available space in cities and inject new vitality into cities.
[0003] In the process of building renovation, the connection between the new structure and the existing structure is a difficult point, especially the beam-column joints. It is necessary to ensure the safety and stability of the existing structure, and to ensure the firmness and reliability of the connection between the old and new structures. At the same time, it is also necessary to create the need to beautify the city and bring about a good visual effect, so as to ultimately achieve the purpose of the coordinated work of the new and old structures. Summary of the invention
[0004] The purpose of the present invention is to provide a method and structure for constructing a rigid beam-column node for the renovation of existing buildings, which can not only avoid damaging the existing rigid columns and causing safety risks, but also reliably combine the existing rigid columns with the newly built steel beams, and has economic and social benefits worthy of promotion.
[0005] The technical solution adopted by the present invention is: A method for constructing a rigid beam-column node for renovation of an existing building, wherein the rigid column is an existing structure and the steel beam is a newly constructed structure, and the following steps are adopted during construction: S1) a temporary beam bottom support is set below the existing structural beam connected to the existing rigid column to ensure safety during construction; S2) the outer concrete of the existing rigid column is chiseled off, and the chiseled off area is within a certain height range above and below the newly constructed steel beam on the side where the newly constructed steel beam is located, until the steel column inside the existing rigid column is exposed; S3) part of the steel bars in the exposed area of the existing rigid column are cut off to avoid interference with subsequent welding of the newly constructed steel beam and the steel column; S4) concrete residues on the welding surface of the steel column are cleaned and rust is removed until The surface shows metallic luster; S5) The newly built steel beam is welded to the steel column, and a reinforcing plate is welded at the lower side of the two to enhance stability. The upper and lower sides of the ends of the newly built steel beams are preset with connecting plates, and reserved holes are set at the webs; S6) The column longitudinal reinforcements retained within the width of the newly built steel beam are overlapped and welded with the connecting plates on the side, the column longitudinal reinforcements retained on the upper and lower sides outside the width of the newly built steel beam are overlapped and welded with newly added steel bars, and the column stirrups retained on the left and right sides within the height of the newly built steel beam are overlapped and welded with newly added steel bars passing through the corresponding reserved holes to restore the connection of the steel bars in the cut-off area, and let the main reinforcement at the beam end pass through the corresponding reserved holes; S7) Use grouting material to fill the chiseled area.
[0006] Preferably, the position of the reserved hole is determined according to the installation position of the newly built steel beam and the positional relationship between the column stirrups and the main reinforcement at the beam end and the newly built steel beam, and the diameter of the reserved hole is larger than the corresponding steel bar diameter.
[0007] Preferably, the position of the connecting plate is determined according to the positional relationship between the column longitudinal reinforcement and the newly built steel beam. The connecting plate is arranged with the same width along the width direction of the newly built steel beam. The thickness of the connecting plate is the diameter of the column longitudinal reinforcement. The height of the connecting plate can meet the lap length of the newly added steel bars not less than 5 times the diameter of the steel bars. The connecting plate and the newly built steel beam are welded by double-sided groove partial penetration welding.
[0008] Preferably, a partition plate with the same thickness as the connecting plate is provided at the connecting plate inside the newly built steel beam.
[0009] Preferably, the reinforcing plate is triangular in shape.
[0010] Preferably, in step S5, the newly built steel beam and the steel column are welded by full penetration groove welding, and the weld quality grade is level one.
[0011] Preferably, in step S6, the retained steel bars are overlap-welded with newly added steel bars of the same specification, and double-sided welding is adopted between the newly added steel bars and the connecting plate.
[0012] Preferably, in step S7, Class IV cement-based grouting material is used, and the grouting is compacted, and the performance indicators of the grouting material are implemented according to the requirements of GB / T50448-2015.
[0013] A rigid beam-column node structure for renovation of an existing building comprises an existing rigid column and a newly built steel beam; the existing rigid column has an outer concrete covering with steel bars on the outside and a steel column on the inside, the outer concrete covering of the existing rigid column at the joint of the newly built steel beam is chiseled out and the steel bars are cut out, the upper and lower sides of the end of the newly built steel beam are preset with connection plates, and reserved holes are provided at the web; the newly built steel beam is welded to the steel column and a reinforcing plate is welded at the lower inner corners of the two, the column longitudinal bars retained within the width of the newly built steel beam are overlap-welded to the connection plates on the sides, the column longitudinal bars retained on the upper and lower sides outside the width of the newly built steel beam are overlap-welded by newly added steel bars, the column stirrups retained on the left and right sides within the height of the newly built steel beam are overlap-welded by newly added steel bars passing through corresponding reserved holes, and the main bars at the beam ends pass through the corresponding reserved holes; the chiseled area of the existing rigid column is filled with grouting material.
[0014] Preferably, a partition plate with the same thickness as the connecting plate is provided at the connecting plate inside the newly built steel beam.
[0015] The beneficial effects of the present invention are: It can not only avoid safety risks caused by damaging existing rigid columns, but also reliably combine existing rigid columns with newly built steel beams, which has economic and social benefits worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 It is a vertical section view when the existing rigid columns have not been removed.
[0018] Figure 2 It is the transverse section view when the existing rigid column is combined with the newly built steel beam.
[0019] Figure 3 It is a vertical section view of the renovated stiffness beam-column joint.
[0020] In the figure: 1-newly built steel beam; 2-existing rigid column; 3-existing structural beam; 4-column longitudinal reinforcement; 5-removed area; 6-retained column longitudinal reinforcement; 7-connecting plate; 8-reserved hole; 9-partition; 10-temporary support at the bottom of the beam; 11-reinforcement plate; 12-removed column longitudinal reinforcement. DETAILED DESCRIPTION
[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0022] Embodiment 1 This embodiment discloses a method for constructing a rigid beam-column node for renovation of an existing building, wherein the rigid column of the node is an existing structure and the steel beam is a newly built structure, and the following steps are adopted during construction: S1) Figure 1 As shown, a temporary support for the bottom of the beam is provided below the existing structural beam 3 connected to the existing rigid column 2 to ensure safety during construction. The temporary support for the bottom of the beam can adopt a conventional tire frame.
[0023] S2) Figure 1 As shown, the outer concrete of the existing rigid column 2 is chiseled off, and the chiseled area 5 is within a certain height range above and below the newly built steel beam 1 on the side where the newly built steel beam 1 is located, until the steel column inside the existing rigid column 2 is exposed. In this embodiment, the chiseled area is within a height range of 500mm above and below the newly built steel beam 1.
[0024] S3) Figure 2 As shown, part of the steel bars in the exposed area of the existing rigid column 2 are cut off to avoid interfering with the subsequent welding of the newly-built steel beam 1 and the steel column.
[0025] S4) Clean the concrete residue on the welding surface of the clean steel column and remove rust until the surface shows metallic luster. In this embodiment, the rust removal level is Sa2.5.
[0026] S5) Figure 2 and Figure 3 As shown, the newly built steel beam 1 is welded to the steel column, and a reinforcing plate 11 is welded at the lower inner corners of the two to enhance stability. The upper and lower sides of the ends of the newly built steel beam 1 are preset with connecting plates 7, and reserved holes 8 are provided at the web. In this embodiment, the newly built steel beam 1 and the steel column are welded by full penetration groove welding, and the weld quality grade is level one.
[0027] S6) Figure 3 As shown, the column longitudinal reinforcement 6 retained within the width of the newly built steel beam 1 is overlap-welded with the connecting plate 7 on the side where it is located, the column longitudinal reinforcement 6 retained on the upper and lower sides outside the width of the newly built steel beam 1 is overlap-welded with newly added steel bars, and the column stirrups retained on the left and right sides within the height of the newly built steel beam 1 are overlap-welded with newly added steel bars passing through the corresponding reserved holes 8, so as to restore the connection of the steel bars in the cut-off area, and allow the main reinforcement at the beam end to pass through the corresponding reserved holes 8. In this embodiment, the retained steel bars are overlap-welded with the newly added steel bars of the same specification, and the newly added steel bars and the connecting plate 7 are welded by double-sided welding.
[0028] S7) Grouting material is used to fill the chiseled area. In this embodiment, Class IV cement-based grouting material is used. The grouting material is poured and compacted. The performance index of the grouting material is implemented according to the requirements of GB / T50448-2015.
[0029] Regarding the reserved hole 8, in this embodiment: the position of the reserved hole 8 is determined according to the installation position of the newly built steel beam 1 and the positional relationship between the column stirrups and the main reinforcement at the beam end and the newly built steel beam 1, and the diameter of the reserved hole 8 is larger than the corresponding steel bar diameter (for example, the corresponding steel bar diameter d+4mm).
[0030] Regarding the connecting plate 7, in this embodiment: Figure 3 As shown, the position of the connecting plate 7 is determined according to the positional relationship between the column longitudinal reinforcement and the newly built steel beam 1. The connecting plate 7 is arranged with the same width along the width direction of the newly built steel beam 1. The thickness of the connecting plate 7 is the diameter of the column longitudinal reinforcement. The height of the connecting plate 7 can meet the lap length of the newly added steel bars not less than 5 times the steel bar diameter. The connecting plate 7 and the newly built steel beam 1 are welded in the form of double-sided groove partial penetration welding.
[0031] Regarding the reinforcing plate 11, in this embodiment: Figure 3 As shown, the reinforcing plate 11 is triangular in shape, and the size of the triangular plate may be 150×150×20 mm.
[0032] In order to improve the connection reliability, in this embodiment: Figure 3 As shown, a partition plate 9 having the same thickness as the connecting plate 7 is provided at the connecting plate 7 inside the newly built steel beam 1 .
[0033] Embodiment 2 This embodiment discloses a rigid beam-column node structure for renovation of an existing building, comprising an existing rigid column and a newly built steel beam; Figure 3 As shown: the exterior of the existing rigid column 2 is an outer concrete with steel bars, and the interior is a steel column. The outer concrete of the existing rigid column 2 at the joint of the new steel beam 1 is chiseled out, and the steel bars are cut off. The upper and lower sides of the end of the new steel beam 1 are preset with connecting plates 7, and reserved holes 8 are provided at the web; the new steel beam 1 is welded to the steel column, and a reinforcing plate 11 is welded at the lower inner corners of the two. The column longitudinal bars retained within the width of the new steel beam 1 are overlap-welded with the connecting plates 7 on the side where they are located, the column longitudinal bars retained on the upper and lower sides outside the width of the new steel beam 1 are overlap-welded with newly added steel bars, and the column stirrups retained on the left and right sides within the height of the new steel beam 1 are overlap-welded with newly added steel bars passing through the corresponding reserved holes 8, and the main bars at the beam ends pass through the corresponding reserved holes 8; the chiseled area of the existing rigid column 2 is filled with grouting material. In order to improve the connection reliability, in this embodiment, Figure 3 As shown, a partition plate 9 having the same thickness as the connecting plate 7 is provided at the connecting plate 7 inside the newly built steel beam 1 .
[0034] The present invention can avoid the safety risk caused by damaging the existing rigid column 2, and can also reliably combine the existing rigid column 2 with the newly built steel beam 1, which has economic and social benefits worthy of promotion.
[0035] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.
Claims
1. A method for constructing a rigid beam-column node for renovation of an existing building, characterized in that: The rigid column is an existing structure and the steel beam is a new structure. The following steps are adopted during construction: S1) Set up a temporary support under the existing structural beam connected to the existing rigid column to ensure safety during construction; S2) Chisel off the outer concrete on the outside of the existing rigid column. The chiseled area is within a certain height range above and below the new steel beam on the side where the new steel beam is located, until the steel column inside the existing rigid column is exposed; S3) Cut off part of the steel bars in the exposed area of the existing rigid column to avoid interfering with the subsequent welding of the new steel beam and the steel column; S4) Clean the concrete residue on the welding surface of the steel column and remove the rust until the surface shows the metallic luster; S5) The newly built steel beam is welded to the steel column, and a reinforcing plate is welded at the lower inner corners of the two to enhance stability. The upper and lower sides of the ends of the newly built steel beams are preset with connection plates, and reserved holes are set at the webs; S6) The column longitudinal reinforcements retained within the width of the newly built steel beam are overlapped and welded with the connection plates on the sides, the column longitudinal reinforcements retained on the upper and lower sides outside the width of the newly built steel beam are overlapped and welded with newly added steel bars, and the column stirrups retained on the left and right sides within the height of the newly built steel beam are overlapped and welded with newly added steel bars passing through the corresponding reserved holes to restore the connection of the steel bars in the cut-off area, and let the main reinforcement at the beam end pass through the corresponding reserved holes; S7) Grouting material is used to fill the chiseled area.
2. The method for constructing rigid beam-column joints for renovation of existing buildings as claimed in claim 1, characterized in that: The position of the reserved hole is determined according to the installation position of the newly built steel beam and the positional relationship between the column stirrups and the main reinforcement at the beam end and the newly built steel beam. The diameter of the reserved hole is larger than the corresponding steel bar diameter.
3. The method for constructing rigid beam-column joints for renovation of existing buildings as claimed in claim 1, characterized in that: The position of the connecting plate is determined according to the positional relationship between the column longitudinal reinforcement and the newly built steel beam. The connecting plate is arranged with the same width along the width direction of the newly built steel beam. The thickness of the connecting plate is the diameter of the column longitudinal reinforcement. The height of the connecting plate can meet the lap length of the newly added steel bars of not less than 5 times the diameter of the steel bars. The connecting plate and the newly built steel beam are welded by double-sided groove partial penetration welding.
4. The method for constructing rigid beam-column joints for renovation of existing buildings as claimed in claim 1, characterized in that: A partition with the same thickness as the connecting plate is provided at the connecting plate inside the newly built steel beam.
5. The method for constructing rigid beam-column joints for renovation of existing buildings as claimed in claim 1, characterized in that: The reinforcing plate is triangular in shape.
6. The method for constructing rigid beam-column joints for renovation of existing buildings as claimed in claim 1, characterized in that: In step S5, the newly built steel beam and the steel column are welded by full penetration groove welding, and the weld quality grade is level one.
7. The method for constructing rigid beam-column joints for renovation of existing buildings as claimed in claim 1, characterized in that: In step S6, the retained steel bars are overlap-welded with newly added steel bars of the same specification, and double-sided welding is adopted between the newly added steel bars and the connecting plate.
8. The method for constructing rigid beam-column joints for renovation of existing buildings as claimed in claim 1, characterized in that: In step S7, Class IV cement-based grouting material is used, and the grouting is compacted during grouting. The performance indicators of the grouting material are implemented in accordance with the requirements of GB / T50448-2015.
9. A rigid beam-column node structure for renovation of existing buildings, characterized in that: It includes existing rigid columns and newly built steel beams; the exterior of the existing rigid columns is concrete with steel bars and the interior is steel columns; the concrete of the existing rigid columns at the joints with the newly built steel beams is chiseled out and the steel bars are cut off; the upper and lower sides of the ends of the newly built steel beams are preset with connecting plates and reserved holes at the webs; the newly built steel beams are welded to the steel columns and reinforcing plates are welded at the lower inner corners of the two; the column longitudinal bars retained within the width of the newly built steel beams are overlap-welded with the connecting plates on the sides where they are located, the column longitudinal bars retained on the upper and lower sides outside the width of the newly built steel beams are overlap-welded with newly added steel bars, the column stirrups retained on the left and right sides within the height of the newly built steel beams are overlap-welded with newly added steel bars passing through the corresponding reserved holes, and the main bars at the beam ends pass through the corresponding reserved holes; the area chiseled out of the existing rigid columns is filled with grouting material.
10. The rigid beam-column node structure for renovation of an existing building as claimed in claim 9, characterized in that: A partition with the same thickness as the connecting plate is provided at the connecting plate inside the newly built steel beam.