Beam-beam rigid connection joint structure of assembly type steel rib connection concrete structure
Through the steel bar structure design of prefabricated main beam and secondary beam, combined with cast-in-place concrete coated steel beef legs and connecting steel bones, the problem of slow construction speed of the beam and beam of prefabricated prefabricated concrete structure is solved, and a fast and reliable connection node structure is achieved, which improves the anti-slip capacity and bearing capacity, and reduces costs.
Patent Information
- Application Number
- CN202422335864.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-24
AI Technical Summary
The use of wet connections of existing prefabricated concrete structure beams and beams has slow construction speed, increased construction measures and difficult to guarantee quality.
The steel bar structure design of prefabricated main beam and prefabricated secondary beam is adopted, including node steel bones, steel beef legs and connecting steel bones. The steel beef legs are coated with cast-in-place concrete and connecting steel bones to form a prefabricated steel bones connecting concrete structure.
It realizes rapid connection without support system, enhances the bonding and grip ability between steel bones and concrete, improves the anti-slip ability, reduces concrete cracking, improves the bearing capacity and construction efficiency, and reduces the overall cost.
Smart Images
Figure CN223214743U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, in particular to a beam-to-beam rigid connection node structure of an assembled steel-framed concrete structure. Background Art
[0002] Precast concrete structures are one of the most widely used and researched industrialized structural systems both domestically and internationally, with their core components being their connection nodes. The construction of these connection nodes not only impacts the construction speed and quality of prefabricated buildings but also determines the building's seismic resistance and safety performance. Currently, the most common construction method for rigidly connecting beams in precast concrete structures is wet-jointing. This involves using supports. Once the reinforcement at the precast component nodes is connected, concrete is poured to form the structure. However, the installation and subsequent removal of the support system slows construction, increases construction costs, and makes on-site construction quality difficult to guarantee. Utility Model Content
[0003] In order to overcome the defects of the existing technology, a beam-beam rigid connection node structure of an assembled steel-framed concrete structure is provided to solve the problem of slow construction speed of wet connection of beam-beam rigid connection of prefabricated assembled concrete structure.
[0004] To achieve the above-mentioned purpose, a beam-to-beam rigid connection node structure of an assembled steel-reinforced concrete structure is provided, comprising:
[0005] A precast main beam, wherein the reinforcement structure of the precast main beam comprises two sections of reinforcement structure and a node steel frame, the two ends of the node steel frame are respectively connected to the two sections of reinforcement structure, and steel brackets are respectively connected to opposite sides of the node steel frame, and the length of the node steel frame gradually increases from bottom to top, the top of the reinforcement structure of the precast main beam extends above the concrete of the precast main beam, and the steel brackets extend to the outside of the concrete of the precast main beam;
[0006] A precast secondary beam, wherein an end of the reinforcement structure of the precast secondary beam is connected to a connecting steel frame, the top of the reinforcement structure of the precast secondary beam extends above the concrete of the precast secondary beam, one end of the connecting steel frame extends outside the concrete of the precast secondary beam, and one end of the connecting steel frame is fixedly connected to the steel corbel;
[0007] Cast-in-situ concrete is poured into the concrete of the prefabricated main beam and the concrete of the prefabricated secondary beam, and the cast-in-situ concrete covers the steel corbel and one end of the connecting steel frame.
[0008] Furthermore, the node steel frame, the steel corbel and the connecting steel frame are I-shaped steel.
[0009] Furthermore, opposite sides of one end of the flange plate connecting the steel frame extend along the plate surface direction of the flange plate to form side wings, and the flange plate and the side wings are connected to the longitudinal main reinforcement of the steel structure of the prefabricated secondary beam.
[0010] Furthermore, the middle part of one end of the flange plate of the connecting steel frame extends obliquely toward the belly of the connecting steel frame to form a middle wing, and the belly of the connecting steel frame extends to form a tail plate connected between the two middle wings. The top and bottom of the prefabricated secondary beam are respectively provided with two layers of longitudinal main reinforcement, an outer layer of longitudinal main reinforcement is connected to the flange plate of the connecting steel frame and the side wings, and an inner layer of longitudinal main reinforcement is connected to the middle wing.
[0011] Furthermore, the middle wing extends along the plate surface direction of the flange plate connecting the steel frame to form a lap wing, and an inner layer of longitudinal main reinforcement is lapped on the lap wing.
[0012] The beneficial effect of the present invention is that the beam-beam rigid connection node structure of the assembled steel-frame connected concrete structure of the present invention can solve the difficulty of construction when connecting the beam-beam rigid connection nodes on the construction site, can eliminate the support system, and can also eliminate the connection bolts between the steel frame and the concrete, solve the problem of the bonding and wrapping ability between the steel frame and the concrete, increase the anti-slip ability, reduce concrete cracking, and improve the bearing capacity of the steel frame connection node. It has the characteristics of optimized performance and wide applicability, which is conducive to reducing the overall cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:
[0014] Figure 1 This is a structural schematic diagram of the rigid connection node structure of the equal-height beams of the assembled steel-concrete structure according to an embodiment of the present invention.
[0015] Figure 2 This is a cross-sectional view of the rigid connection node structure of the equal-height beams of the assembled steel-concrete structure according to an embodiment of the present invention.
[0016] Figure 3 This is a structural schematic diagram of the unequal height beam rigid connection node structure of the assembled steel-concrete structure according to an embodiment of the present invention.
[0017] Figure 4 This is a cross-sectional view of the rigid connection node structure of unequal height beams in an assembled steel-concrete structure according to an embodiment of the present invention.
[0018] Figure 5 This is a schematic diagram of the first structure of the connection node between the corbel and the connecting steel frame according to an embodiment of the utility model.
[0019] Figure 6 This is a front view of a first structure of a connection node between a corbel and a connecting steel frame according to an embodiment of the present invention.
[0020] Figure 7 This is a schematic diagram of the second structure of the connection node between the corbel and the connecting steel frame according to an embodiment of the present invention.
[0021] Figure 8 This is a third schematic diagram of the connection node between the corbel and the connecting steel frame according to an embodiment of the present invention.
[0022] Figure 9 This is a fourth structural schematic diagram of the connection node between the corbel and the connecting steel frame according to an embodiment of the present invention. DETAILED DESCRIPTION
[0023] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.
[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0025] Reference Figures 1 to 9 As shown, the utility model provides a beam-beam rigid connection node structure of an assembled steel-framed concrete structure, comprising: a prefabricated main beam 1, a prefabricated secondary beam 2, and cast-in-place concrete 3.
[0026] In this embodiment, the precast main beam 1 includes a steel structure and concrete. The concrete of the precast main beam 1 is coated on the lower part of the steel structure of the precast main beam 1. The upper part of the steel structure of the precast main beam 1 is exposed above the concrete of the precast main beam 1.
[0027] Specifically, the reinforcement structure of the precast main beam 1 includes two sections of reinforcement and a steel node 11. The two ends of the steel node 11 are connected to the two sections of reinforcement. Steel brackets 12 are connected to opposite sides of the steel node 11. The length of the steel node 11 gradually increases from bottom to top. The top of the reinforcement structure of the precast main beam 1 extends above the concrete of the precast main beam 1. The steel brackets 12 extend outside the concrete of the precast main beam 1.
[0028] The precast secondary beam 2 includes a steel structure and concrete. The concrete of the precast secondary beam 2 is covered on the lower part of the steel structure of the precast secondary beam 2. The upper part of the steel structure of the precast secondary beam 2 is exposed above the concrete of the precast secondary beam 2.
[0029] The end of the reinforcement structure of the precast secondary beam 2 is connected to a connecting steel frame 21. The top of the reinforcement structure of the precast secondary beam 2 extends above the concrete of the precast secondary beam 2. One end of the connecting steel frame 21 extends outside the concrete of the precast secondary beam 2. One end of the connecting steel frame 21 is fixedly connected to the steel corbel 12.
[0030] The cast-in-situ concrete 3 is poured on the concrete of the precast main beam 1 and the concrete of the precast secondary beam 2. The cast-in-situ concrete 3 is covered on the steel corbel 12 and one end of the connecting steel frame 21.
[0031] As a preferred embodiment, the node steel frame 11, the steel corbel 12 and the connecting steel frame 21 are I-shaped steel.
[0032] The two opposite sides of one end of the flange plate connected to the steel frame 21 extend along the plate surface direction of the flange plate to form side wings a. The flange plate and side wings a are connected to the longitudinal main reinforcement of the steel structure of the prefabricated secondary beam 2.
[0033] The middle portion of one end of the flange plate of the connecting steel frame 21 extends diagonally toward the web of the connecting steel frame 21 to form the center wing b. The web of the connecting steel frame 21 extends to form a tail plate d, which connects between the two center wing b. The precast secondary beam 2 is provided with two layers of longitudinal main reinforcement at the top and bottom, respectively. The outer layer of longitudinal main reinforcement connects to the flange plate of the connecting steel frame 21 and the side wing a. The inner layer of longitudinal main reinforcement connects to the center wing b.
[0034] The middle wing b extends along the plate surface direction of the flange plate connected to the steel frame 21 to form a lap wing c, and a layer of longitudinal main reinforcement on the inner side is lapped on the lap wing c.
[0035] The beam-to-beam rigid connection node structure of the assembled steel-frame concrete structure of the present invention can solve the difficulty in construction when connecting beam-to-beam rigid connection nodes on the construction site, can eliminate the need for a support system, and can also eliminate the need for connecting bolts between the steel frame and the concrete, thereby solving the problem of the bonding and holding ability between the steel frame and the concrete, increasing the anti-slip ability, reducing concrete cracking, and improving the bearing capacity of the steel frame connection node. It has the characteristics of optimized performance and wide applicability, and is conducive to reducing the overall cost.
[0036] The beam-to-beam rigid connection node of the assembled steel-frame connected concrete structure of the present invention is constructed by pre-embedded connecting steel frames at the ends of prefabricated secondary beam components, and reserved node steel frames in the prefabricated main beams. Both sides of the node steel frames are fixedly connected to the connecting steel frames by corbels (or steel corbels). The flange cross-section of the steel frames or steel corbels is determined by the strength of the longitudinal reinforcement of the beam, and the web can also be used for shear resistance. The connecting steel frames and corbels are reliably welded to the steel bars in the concrete beam components and then prefabricated into prefabricated concrete beam components in the factory. At the construction site, the prefabricated concrete beam components are connected into a structural system through the steel frame dry node connection (all-bolt, all-weld and bolt-weld connection can be applied) at the ends of the prefabricated concrete beam components.
[0037] See Figure 3 and Figure 4 As shown, the beam-to-beam rigid connection node structure of the assembled steel-frame concrete structure of the present invention is an unequal height beam-to-beam rigid connection node structure. During the processing and manufacturing process, the node steel frame and the bracket are embedded in the prefabricated main beam, and the top steel bar of the prefabricated main beam is welded to the upper and lower flange plates of the node steel frame. The welding length meets the requirements, and the bottom reinforcement is arranged throughout the length. Figure 7 、 Figure 8 and Figure 9 As shown, when there is only one row (layer) of longitudinal steel bars at the top of the prefabricated main beam, the steel bars are arranged throughout the length; when there are two rows (layers) of longitudinal steel bars, the outer layer of longitudinal steel bars is arranged throughout the length, and the inner layer of longitudinal steel bars is welded to the inner side of the upper flange of the node steel frame.
[0038] The following points are important in the production of node steel frames:
[0039] 1. Ventilation holes are opened on the upper and lower flanges of the node steel frame to ensure that the concrete is tightly connected to the steel during pouring, increase the bond strength between the two, and prevent the steel and concrete from slipping;
[0040] 2. When the top reinforcement of the precast primary beam is double-row, two side wings extend from the edges of the upper flange to ensure the welding length of the second row of edge reinforcement (single-sided welding). Similarly, two side wings extend from the upper and lower flanges of the connecting steel frame in the precast secondary beam. The precast secondary beam reinforcement is welded to the bracket.
[0041] When connecting the primary and secondary beams at the construction site, the precast primary beam's corbel is connected to the connecting steel frame within the precast secondary beam. This connection can be achieved using all-bolt, all-welded, or bolt-welded methods. The precast primary and secondary beams are then tied with upright reinforcement and stirrups (the stirrups can be stacked on the beam corbel or on the connecting steel frame within the secondary beam before the steel frame is connected). Concrete is then poured to complete the joint construction.
[0042] See Figure 5 and Figure 6 As shown, the upper and lower flanges of the node steel frames of the prefabricated main beam and the connecting steel frames in the prefabricated secondary beam connected to the second row of steel bars are extended to form middle wings and lap wings to facilitate welding with the second row of steel bars.
[0043] See Figure 1 and Figure 2 As shown, the beam-to-beam rigid connection structure of the prefabricated steel-reinforced concrete structure of the present invention is a uniform-height beam-to-beam rigid connection structure. Similar to the unequal-height beam-to-beam rigid connection structure, the only difference is that when there are two rows of steel bars at the bottom of the prefabricated main beam, the first row runs the entire length, while the second row is welded to the inner side of the lower flange of the prefabricated main beam's node steel.
[0044] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.
Claims
1. A beam-to-beam rigid connection node structure of an assembled steel-framed concrete structure, characterized in that: include: A precast main beam, wherein the reinforcement structure of the precast main beam comprises two sections of reinforcement structure and a node steel frame, the two ends of the node steel frame are respectively connected to the two sections of reinforcement structure, and steel brackets are respectively connected to opposite sides of the node steel frame, and the length of the node steel frame gradually increases from bottom to top, the top of the reinforcement structure of the precast main beam extends above the concrete of the precast main beam, and the steel brackets extend to the outside of the concrete of the precast main beam; A precast secondary beam, wherein an end of the reinforcement structure of the precast secondary beam is connected to a connecting steel frame, the top of the reinforcement structure of the precast secondary beam extends above the concrete of the precast secondary beam, one end of the connecting steel frame extends outside the concrete of the precast secondary beam, and one end of the connecting steel frame is fixedly connected to the steel corbel; Cast-in-situ concrete is poured into the concrete of the prefabricated main beam and the concrete of the prefabricated secondary beam, and the cast-in-situ concrete covers the steel corbel and one end of the connecting steel frame.
2. The beam-to-beam rigid connection node structure of the assembled steel-framed concrete structure according to claim 1 is characterized in that: The node steel frame, the steel corbel and the connecting steel frame are I-shaped steel.
3. The beam-to-beam rigid connection node structure of the assembled steel-concrete structure according to claim 2 is characterized in that: The opposite sides of one end of the flange plate connecting the steel frame extend along the plate surface direction of the flange plate to form side wings, and the flange plate and the side wings are connected to the longitudinal main reinforcement of the steel structure of the prefabricated secondary beam.
4. The beam-to-beam rigid connection node structure of the assembled steel-framed concrete structure according to claim 3 is characterized in that: The middle portion of one end of the flange plate of the connecting steel frame extends obliquely toward the web of the connecting steel frame to form a middle wing, and the web of the connecting steel frame extends to form a tail plate connected between the two middle wings. The top and bottom of the prefabricated secondary beam are respectively provided with two layers of longitudinal main reinforcement, an outer layer of longitudinal main reinforcement is connected to the flange plate of the connecting steel frame and the side wings, and an inner layer of longitudinal main reinforcement is connected to the middle wing.
5. The beam-to-beam rigid connection node structure of the assembled steel-concrete structure according to claim 4 is characterized in that: The middle wing extends along the plate surface direction of the flange plate connecting the steel frame to form a lap wing, and an inner layer of longitudinal main reinforcement is lapped on the lap wing.