Connecting structure of cast-in-place beam and steel column
By setting steel bar connectors and connecting steel plates at both ends of cast-in-place beams and welding them with steel columns, the problems of low load-bearing capacity and stability caused by direct welding of steel bars in the prior art are solved, and higher welding quality and load-bearing capacity are achieved.
Patent Information
- Application Number
- CN202421726841.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-19
AI Technical Summary
In the prior art, the steel bars of cast-in-place beams are directly welded with steel columns of steel concrete, resulting in low load-bearing capacity and connection stability of the connection parts.
Supports are used to install at both ends of the cast-in-place beam. The support includes a steel bar connector and a connecting steel plate. The steel bars of the cast-in-place beam are threadedly connected to the steel connector. The steel bar support is welded and fixed to the connecting steel plate on the connecting steel plate, and the steel bar connector and the connecting steel plate are welded and fixed to the steel column.
Through the use of steel bar connectors and connecting steel plates, weld quality and consistency can be improved, welding contact area can be increased, stress can be dispersed, load-bearing capacity and connection stability can be improved, welding defects can be avoided, and cross-sectional performance of steel columns can be maintained.
Smart Images
Figure CN222923909U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, and particularly relates to a connection structure between a cast-in-place beam and a steel column. Background Technique
[0002] A steel-reinforced concrete column (abbreviated as SCC column or SRC column, namely Steel-Reinforced Concrete Column or Steel-Concrete Composite Column) is a composite structural column, and its feature is that a steel column (H-shaped steel, I-shaped steel or a steel column with other shapes) is embedded inside the concrete column. The steel-reinforced concrete column combines the advantages of the steel column and the concrete column. The steel column provides high strength and good ductility, and can absorb energy and maintain the integrity of the structure under dynamic loads such as earthquakes. The concrete column coated on the surface of the steel column provides good fire resistance, protects the internal steel column from high temperature, and increases the stiffness and stability of the whole structure.
[0003] The connection between the steel-reinforced concrete column and the cast-in-place beam is one of the key links in the steel-reinforced concrete structural system, and the effectiveness of the connection directly affects the stiffness, stability and bearing capacity of the overall structure. At present, the connection between the steel-reinforced concrete column and the cast-in-place beam is usually realized by the way of integral casting. In this connection way, the steel bars of the cast-in-place beam are connected with the steel column of the steel-reinforced concrete column by means of welding, mechanical connection, etc., and then concrete is poured outside the steel bars and the steel column. However, this connection way still has the following disadvantages:
[0004] 1) The steel bars of the cast-in-place beam are directly welded to the steel column. On the one hand, it is difficult to form a stable welding interface between the steel column and the suspended steel bars, and it is not convenient to control the welding process. Therefore, it is difficult to improve the welding quality and consistency, and welding defects are likely to occur. On the other hand, the end of the steel bar is welded to the steel column, the contact surface is small, and the stress is relatively concentrated, which is not conducive to improving the bearing capacity and connection stability of the welding part.
[0005] 2) The mechanical connection between the steel bars of the cast-in-place beam and the steel column usually requires pre-drilling holes on the steel column, then inserting the processed end of the steel bar into the hole of the steel column, and then fixing the two together by means of mechanical connection methods such as sleeve extrusion connection, taper thread connection, straight thread connection, etc. Drilling holes on the steel column will weaken the section performance of the steel column, which is not conducive to improving the overall bearing capacity. Content of the Utility Model
[0006] The utility model aims to provide a connection structure between a cast-in-place beam and a steel column to solve the technical problem that in the prior art, the steel bars of the cast-in-place beam are directly welded to the steel column of the steel-reinforced concrete, resulting in low bearing capacity and connection stability of the connection part.
[0007] To achieve the above purpose, the utility model adopts the following technical scheme:
[0008] A connecting structure between a cast-in-place beam and a steel column, comprising bearings arranged at both ends of the steel bars of the cast-in-place beam. The bearings include steel bar connectors and connecting steel plates. The steel bars of the cast-in-place beam are threadedly connected to the steel bar connectors, and the steel bars of the cast-in-place beam are supported on the connecting steel plates and welded and fixed to the connecting steel plates. Both the steel bar connectors and the connecting steel plates are welded and fixed to the steel column; when there is only one row of upper steel bars in the cast-in-place beam, the bearings at both ends of the upper steel bars both adopt connecting steel plates. When there are two or more rows of upper steel bars in the cast-in-place beam, the bearings at both ends of the upper steel bars respectively adopt steel bar connectors and connecting steel plates, and the steel bar connectors and the connecting steel plates are alternately arranged in the vertical direction; the connecting structure of the lower steel bars of the cast-in-place beam is the same as that of the upper steel bars.
[0009] Principle and beneficial effects of this solution:
[0010] 1. In this solution, the steel bar connectors and the connecting steel plates are welded and fixed to the steel column, and then the steel bars of the cast-in-place beam are threadedly connected to the steel bar connectors, or the steel bars of the cast-in-place beam are supported on the connecting steel plates and welded and fixed to the connecting steel plates to realize the connection between the steel bars of the cast-in-place beam and the steel column; on the one hand, the lengths of the steel bar connectors and the connecting steel plates are smaller than those of the steel bars of the cast-in-place beam, and it is easier to form stable welding interfaces between the steel bar connectors and the steel column and between the connecting steel plates and the steel column. Moreover, the steel bars of the cast-in-place beam are supported on the connecting steel plates and then welded to the connecting steel plates, and it is also easy to form a stable welding interface between the steel bars of the cast-in-place beam and the connecting steel plates, so as to facilitate the control of the welding process, which is beneficial to improving the welding quality and consistency and reducing or even avoiding welding defects; on the other hand, the steel bars of the cast-in-place beam are welded to the steel column through the steel bar connectors and the connecting steel plates. Compared with the way of directly welding the ends of the steel bars to the steel column, it can effectively increase the welding contact area, which is beneficial to dispersing stress, thus being beneficial to improving the bearing capacity and safety of the welding part and ensuring the connection stability.
[0011] 2. This solution indirectly realizes the welding and fixing of the steel bars of the cast-in-place beam and the steel column through the steel bar connectors and the connecting steel plates. Compared with connecting the steel bars of the cast-in-place beam and the steel column by mechanical connection, it can avoid drilling holes in the steel column, thus effectively ensuring the cross-sectional performance of the steel column and being beneficial to improving the overall bearing capacity.
[0012] 3. When there is only one row of upper steel bars in the cast-in-place beam in this solution, both the bearings at both ends of the upper steel bars adopt connecting steel plates. The two ends of the upper steel bars are respectively supported on the connecting steel plates at the corresponding positions and then welded and fixed to the connecting steel plates at the corresponding positions, which can form a stable welding interface between the steel bars of the cast-in-place beam and the connecting steel plates, facilitate the control of the welding process, be beneficial to improving the welding quality and consistency, and reduce or even avoid welding defects; and because there is only one row of upper steel bars, the operation space will not be occupied by the upper row of steel bars during the welding process, ensuring the convenience of operation and further ensuring the welding quality.
[0013] 4. When there are two or more rows of upper steel bars in the cast-in-place beam, the supports at both ends of the upper steel bars adopt steel bar connectors and connecting steel plates respectively, and the steel bar connectors and connecting steel plates are alternately arranged in the vertical direction. This arrangement has the following advantages: 1) By alternately welding the steel bar connectors and connecting steel plates with the steel column at the ends of the steel bars in different rows, the stress generated by the load can be more evenly dispersed, avoiding stress concentration, thereby improving the bearing capacity and safety of the connection part; 2) Under the action of earthquake, the alternately arranged steel bar connectors and connecting steel plates can provide a better energy dissipation mechanism, and through the coordinated work of multiple connection points, improve the ductility and seismic performance of the structure; 3) The steel bar connectors and connecting steel plates are alternately arranged in the vertical direction, which can effectively avoid the distance between two adjacent connecting steel plates in the vertical direction being too close, ensuring that there is enough operating space for welding the steel bars of the cast-in-place beam and the connecting steel plates, which is conducive to ensuring the welding quality.
[0014] 5. The connection structure of the lower steel bars of the cast-in-place beam in this solution is the same as that of the upper steel bars. On the one hand, it can ensure that the steel bars in all parts of the cast-in-place beam are effectively connected to the steel column, thus ensuring the stiffness, stability and bearing capacity of the overall structure. On the other hand, the connection structure of the steel bars in all parts of the cast-in-place beam to the steel column is the same, which is conducive to maintaining the consistency of the installation process, facilitating on-site construction and improving construction efficiency.
[0015] Preferably, as an improvement, the width of the connecting steel plate is less than or equal to the distance between two adjacent column bars of the steel reinforced concrete column.
[0016] Beneficial effects: 1) This solution can ensure that the width of the connecting steel plate does not exceed the interval between the column bars, avoiding conflicts between the connecting steel plate and the longitudinal steel bars in the column, ensuring that all steel bars can be correctly positioned and will not interfere with each other; 2) The narrower connecting steel plate is easier to position and install in a limited space, especially in the case of dense column bars, which can reduce the construction difficulty and improve the construction efficiency; 3) The narrower connecting steel plate can leave more space for the concrete to flow and be compacted, avoiding voids or honeycomb phenomena in the subsequent pouring process, ensuring the compactness and quality of the concrete, and thus ensuring the bearing capacity and stability of the steel reinforced concrete column and even the entire structure.
[0017] Preferably, as an improvement, the length of the connecting steel plate is equal to the width of the cast-in-place beam.
[0018] Beneficial effects: 1) This solution can ensure that the connecting steel plate and the steel bars of the cast-in-place beam have sufficient contact area and welding area, thereby improving the connection strength between the steel bars of the cast-in-place beam and the steel column and ensuring the stability of the overall structure when bearing loads; 2) The connecting steel plate with sufficient contact area and welding area with the steel bars of the cast-in-place beam can disperse loads and stresses more evenly, avoid stress concentration, and thus improve the bearing capacity and ductility of the connection structure; 3) The length of the connecting steel plate is long enough to increase the rigidity of the connection structure between the steel bars of the cast-in-place beam and the steel column, reduce the deformation of the connection structure under the action of loads, improve the stability of the connection structure, and thus improve the stability of the overall structure.
[0019] Preferably, as an improvement, the weld length between the steel bars of the cast-in-place beam and the connecting steel plate is greater than or equal to five times the diameter of the steel bars of the cast-in-place beam.
[0020] Beneficial effects: This solution can ensure welding strength and structural reliability, and the specific analysis is as follows: 1) Increasing the weld length can improve the load-bearing capacity of the weld, ensure that the strength of the connection part between the steel bars and the connecting steel plate is not lower than that of the steel bars themselves, and thus guarantee the load-bearing capacity and safety of the overall structure; 2) A longer weld can provide better ductility, which means that when subjected to external forces, the connection part between the steel bars and the connecting steel plate can absorb more energy without breaking immediately, which is beneficial to improving the seismic performance of the overall structure; 3) A longer weld helps to disperse stress, avoid stress concentration caused by too short a weld, and thus reduce the risk of cracks and fractures in the connection part between the steel bars and the connecting steel plate.
[0021] Preferably, as an improvement, the weld height between the steel bars of the cast-in-place beam and the connecting steel plate is greater than or equal to half of the diameter of the steel bars of the cast-in-place beam.
[0022] Beneficial effects: This solution can ensure the welding connection strength between the steel bars of the cast-in-place beam and the connecting steel plate, thereby improving the reliability and safety of the overall structure. The specific analysis is as follows: 1) A higher weld can provide a larger contact area and stronger bonding force, thereby improving the connection strength between the steel bars of the cast-in-place beam and the connecting steel plate and ensuring the stability of the structure when bearing loads; 2) The weld height reflects the amount of filler material and the welding energy input during the welding process. Sufficient weld height helps to ensure the penetration depth and full penetration during the welding process, and reduce welding defects such as lack of fusion and cracks; 3) A weld with a certain height can improve the ductility of the connection part between the steel bars of the cast-in-place beam and the connecting steel plate, so that under earthquakes or other dynamic loads, the connection part can absorb more energy without failing immediately, which is beneficial to improving the seismic performance of the connection structure and even the entire structure.
[0023] Preferably, as an improvement, the horizontal projection distance between the top of the weld and the weld edge of the steel bars of the cast-in-place beam and the connecting steel plate is greater than or equal to half of the weld height.
[0024] Beneficial effects: This solution can improve the welding connection quality between the steel bars and the connecting steel plates of the cast-in-place beam and the structural safety. The specific analysis is as follows: 1) The weld edge is often a stress concentration area because the sudden change in the geometric shape at the weld edge easily forms a stress gradient. This solution can reduce the stress concentration effect and improve the fatigue performance and ductility of the connection part between the steel bars and the connecting steel plates of the cast-in-place beam by increasing the horizontal projection distance between the weld top and the weld edge; 2) A larger horizontal projection distance between the weld top and the weld edge helps to form a more rounded weld shape, which can better disperse stress and reduce the possibility of crack occurrence, ensuring the welding quality; 3) Increasing the horizontal projection distance between the weld top and the weld edge can ensure that the weld has sufficient width and thickness, thereby improving the strength and toughness of the weld, making it less likely to be damaged when bearing loads and ensuring the safety of the overall structure. Description of the Drawings
[0025] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present utility model.
[0026] Figure 2 It is a schematic structural diagram of the connection part between the upper steel bars and the connecting steel plates in Embodiment 1 of the present utility model.
[0027] Figure 3 is Figure 2 the left view of the upper steel bars and the connecting steel plates.
[0028] Figure 4 It is a schematic structural diagram of Embodiment 2 of the present utility model. Detailed Description of the Preferred Embodiments
[0029] The following is a more detailed description through specific embodiments:
[0030] The reference numerals in the drawings of the specification include: support 1, connecting steel plate 11, steel bar connector 12, upper steel bar 2, upper first row of steel bars 21, upper second row of steel bars 22, lower steel bar 3, lower first row of steel bars 31, lower second row of steel bars 32, cast-in-place beam 4, steel column 5, weld length L, steel bar diameter D, weld height H, horizontal projection distance S between the weld top and the weld edge.
[0031] Embodiment 1
[0032] A connection structure between a cast-in-place beam 4 and a steel column 5, as shown in the attached Figure 1As shown in the figure, it includes bearings 1 arranged at both ends of the steel bars of the cast-in-place beam 4. The bearing 1 includes a connecting steel plate 11. The steel bars of the cast-in-place beam 4 are supported on the connecting steel plate 11 and are welded and fixed to the connecting steel plate 11, and the connecting steel plate 11 is welded and fixed to the steel column 5. In this embodiment, there is only one row of upper steel bars 2 of the cast-in-place beam 4, and the bearings 1 at both ends of the upper steel bars 2 both adopt connecting steel plates 11. The two ends of the upper steel bars 2 are supported on the connecting steel plates 11 at the corresponding positions, and the two ends of the upper steel bars 2 are welded and fixed to the connecting steel plates 11 at the corresponding positions.
[0033] The connection structure of the lower steel bars 3 of the cast-in-place beam 4 is the same as that of the upper steel bars 2. In this embodiment, there is also only one row of lower steel bars 3 of the cast-in-place beam 4, so the bearings 1 at both ends of the lower steel bars 3 also both adopt connecting steel plates 11. The two ends of the lower steel bars 3 are supported on the connecting steel plates 11 at the corresponding positions, and the two ends of the lower steel bars 3 are welded and fixed to the connecting steel plates 11 at the corresponding positions.
[0034] In this embodiment, the upper steel bars 2 and the lower steel bars 3 of the cast-in-place beam 4 have the same size, and all the connecting steel plates 11 have the same size.
[0035] Combined Figure 2 and Figure 3 As shown in the figure, the width of the connecting steel plate 11 is less than or equal to the distance between two adjacent column bars of the steel reinforced concrete column, and the length of the connecting steel plate 11 is equal to the width of the cast-in-place beam 4. The weld length L between the steel bars of the cast-in-place beam 4 (including the upper steel bars 2 and the lower steel bars 3, the same below) and the connecting steel plate 11 is greater than or equal to five times the diameter D of the steel bars of the cast-in-place beam 4, the weld height H between the steel bars of the cast-in-place beam 4 and the connecting steel plate 11 is greater than or equal to half of the diameter D of the steel bars of the cast-in-place beam 4, and the horizontal projection distance S between the top of the weld and the weld edge of the steel bars of the cast-in-place beam 4 and the connecting steel plate 11 is greater than or equal to half of the weld height H.
[0036] The specific implementation process is as follows:
[0037] (1) Welding of the connecting steel plate 11: Weld the connecting steel plate 11 at the corresponding position of the steel column 5 according to the design drawing so that the connecting steel plate 11 is horizontally arranged.
[0038] (2) Welding of steel bars: Support the two ends of the upper steel bars 2 and the lower steel bars 3 on the connecting steel plates 11 at the corresponding positions so that the upper steel bars 2 and the lower steel bars 3 are horizontally arranged. Adjust the relative positions of the upper steel bars 2 and the lower steel bars 3 and the connecting steel plates 11 at the corresponding positions, and weld the upper steel bars 2 and the lower steel bars 3 to the connecting steel plates 11 at the corresponding positions to realize the connection between the steel bars of the cast-in-place beam 4 and the steel column 5.
[0039] (3) Concrete pouring: After all the steel bars of the cast-in-place beam 4 are welded and fixed to the steel column 5 through the connecting steel plates 11, formwork is erected on the upper steel bars 2, lower steel bars 3 and outside the steel column 5, and concrete is poured into the formwork to complete the connection between the cast-in-place beam 4 and the steel reinforced concrete column.
[0040] Embodiment 2
[0041] A connection structure between the cast-in-place beam 4 and the steel column 5, as shown in the appendix Figure 4 It is different from Embodiment 1 in that: The support 1 further includes a steel bar connector 12. The steel bars of the cast-in-place beam 4 are threadedly connected to the steel bar connector 12, and the steel bar connector 12 is welded and fixed to the steel column 5. When there are two or more rows of upper steel bars 2 of the cast-in-place beam 4, the supports 1 at both ends of the upper steel bars 2 respectively adopt the steel bar connector 12 and the connecting steel plate 11, and the steel bar connector 12 and the connecting steel plate 11 are alternately arranged in the vertical direction. The steel bar connector 12 adopts a steel sleeve of the existing technology, and its structure will not be elaborated in this embodiment.
[0042] In this embodiment, there are two rows of upper steel bars 2, including the upper first-row steel bars 21 and the upper second-row steel bars 22. The left-end support 1 of the upper first-row steel bars 21 adopts the connecting steel plate 11, and the right-end support 1 of the upper first-row steel bars 21 adopts the steel bar connector 12; the left-end support 1 of the upper second-row steel bars 22 adopts the steel bar connector 12, and the right-end support 1 of the upper second-row steel bars 22 adopts the connecting steel plate 11. The left end of the upper first-row steel bars 21 and the right end of the upper second-row steel bars 22 are supported on the connecting steel plates 11 at the corresponding positions and are welded and fixed to the connecting steel plates 11 at the corresponding positions. The right end of the upper first-row steel bars 21 and the left end of the upper second-row steel bars 22 are threadedly connected inside the steel bar connectors 12 at the corresponding positions.
[0043] There are also two rows of lower steel bars 3, including the lower first-row steel bars 31 and the lower second-row steel bars 32. The left-end support 1 of the lower first-row steel bars 31 adopts the connecting steel plate 11, and the right-end support 1 of the lower first-row steel bars 31 adopts the steel bar connector 12; the left-end support 1 of the lower second-row steel bars 32 adopts the steel bar connector 12, and the right-end support 1 of the lower second-row steel bars 32 adopts the connecting steel plate 11. The left end of the lower first-row steel bars 31 and the right end of the lower second-row steel bars 32 are supported on the connecting steel plates 11 at the corresponding positions and are welded and fixed to the connecting steel plates 11 at the corresponding positions. The right end of the lower first-row steel bars 31 and the left end of the lower second-row steel bars 32 are threadedly connected inside the steel bar connectors 12 at the corresponding positions.
[0044] The specific implementation process is as follows:
[0045] (1) Welding of the connection structure: Weld the steel bar connector 12 and the connecting steel plate 11 at the corresponding positions of the steel column 5 according to the design drawings, so that both the steel bar connector 12 and the connecting steel plate 11 are horizontally arranged.
[0046] (2) Steel bar connection and welding: One end of the upper steel bar 2 and the lower steel bar 3 is threadedly connected to the steel bar connectors 12 at the corresponding positions, and the other ends of the upper steel bar 2 and the lower steel bar 3 are supported on the connection steel plates 11 at the corresponding positions, so that the upper steel bar 2 and the lower steel bar 3 are horizontally arranged. Adjust the relative positions of the upper steel bar 2 and the lower steel bar 3 and the connection steel plates 11 at the corresponding positions, and weld and fix the upper steel bar 2 and the lower steel bar 3 to the connection steel plates 11 at the corresponding positions to realize the connection between the steel bars of the cast-in-place beam 4 and the steel column 5.
[0047] (3) Concrete pouring: After all the steel bars of the cast-in-place beam 4 are fixedly connected to the steel column 5 through the connection structure, formwork is erected outside the upper steel bar 2, the lower steel bar 3 and the steel column 5, and concrete is poured into the formwork to complete the connection between the cast-in-place beam 4 and the steel reinforced concrete column.
[0048] The above are only embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.
Claims
1. A connection structure between a cast-in-place beam and a steel column, characterized in that: It includes supports arranged at both ends of the steel bars of the cast-in-place beam, the supports include steel bar connectors and connecting steel plates, the steel bars of the cast-in-place beam are threadedly connected to the steel bar connectors, the steel bars of the cast-in-place beam are supported on the connecting steel plates and are welded and fixed to the connecting steel plates, and the steel bar connectors and the connecting steel plates are both welded and fixed to the steel columns; when there is only one row of upper steel bars of the cast-in-place beam, the supports at both ends of the upper steel bars both use connecting steel plates, when there are two or more rows of upper steel bars of the cast-in-place beam, the supports at both ends of the upper steel bars respectively use steel bar connectors and connecting steel plates, and the steel bar connectors and connecting steel plates are alternately arranged in the vertical direction; the connection structure of the lower steel bars of the cast-in-place beam is the same as the connection structure of the upper steel bars.
2. The connection structure of a cast-in-place beam and a steel column according to claim 1, characterized in that: The width of the connecting steel plate is less than or equal to the distance between two adjacent column bars of the steel concrete column.
3. The connection structure of a cast-in-place beam and a steel column according to claim 2, characterized in that: The length of the connecting steel plate is equal to the width of the cast-in-place beam.
4. The connection structure of a cast-in-place beam and a steel column according to claim 1, characterized in that: The length of the weld between the steel bars of the cast-in-place beam and the connecting steel plate is greater than or equal to five times the diameter of the steel bars of the cast-in-place beam.
5. The connection structure of a cast-in-place beam and a steel column according to claim 4, characterized in that: The height of the weld between the steel bars of the cast-in-place beam and the connecting steel plate is greater than or equal to half the diameter of the steel bars of the cast-in-place beam.
6. The connection structure of a cast-in-place beam and a steel column according to claim 5, characterized in that: The horizontal projection distance between the top of the weld connecting the steel bar of the cast-in-place beam and the steel plate and the edge of the weld is greater than or equal to half the height of the weld.