A hinge joint steel bar structure
By setting a composite steel reinforcement structure at the hinge joint, including main reinforcement, secondary reinforcement, longitudinal stirrups and transverse stirrups, the problems of insufficient coordination and shear resistance of the hinge joint reinforcement structure are solved, and the stability and service life of the hinge joint are extended.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN HOLSIN ENG TECH CO LTD
- Filing Date
- 2025-09-22
- Publication Date
- 2026-07-10
AI Technical Summary
The existing hinged joint reinforcement structure has insufficient coordination and shear resistance, resulting in longitudinal cracking of concrete and poor shear resistance of the hinge joint.
The structure adopts a combination of first main reinforcement, second main reinforcement, secondary reinforcement, longitudinal stirrups, transverse stirrups and continuous reinforcement. By setting anchoring main reinforcement at the top and bottom triangular grooves of the hinge joint, the synergy between the reinforcements is enhanced. The shear force is transmitted through the tightening of the longitudinal and transverse stirrups, and the anchoring strength is enhanced by the use of U-shaped reinforcement.
It enhances the stress coordination of the reinforcing bars at the hinge joint, improves shear resistance, and extends the service life of the concrete beam.
Smart Images
Figure CN224478583U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel reinforcement structure technology, specifically to a hinged steel reinforcement structure. Background Technology
[0002] A hinge joint is a post-cast concrete structure between precast slabs and beams in a building, serving the core function of laterally connecting adjacent slabs and beams. The hinge joint reinforcement structure is the core load-bearing system for the connection between precast slabs and beams in a building, with the core function of "transmitting lateral shear force and ensuring structural coordination". It often uses a combination of ribbed steel bars and plain round steel bars to form a spatial grid skeleton.
[0003] Patent application publication number CN105648899B discloses a hinged joint reinforcement structure for a concrete hollow slab bridge. It includes a hollow slab body and hollow slab stirrups inside it. Multiple U-shaped hinged joint pin-connected reinforcing bars are arranged between adjacent hollow slab bodies. Multiple closed-ring hinged tensile reinforcing bars are arranged between the hinged joint pin-connected reinforcing bars and the hollow slab stirrups on both sides. Longitudinal reinforcing bars for the hollow slab and longitudinal reinforcing bars for the hinged joint are arranged inside the hollow slab stirrups and between the hinged joint pin-connected reinforcing bars, respectively. The longitudinal reinforcing bars in the above patent have insufficient synergy with the longitudinal reinforcing bars of the hollow slab, which easily leads to longitudinal cracking of the concrete. The arrangement of the U-shaped pin-connected reinforcing bars between adjacent hollow slabs makes them prone to lateral displacement under transverse shear force, resulting in insufficient shear resistance of the hinged joint.
[0004] Therefore, the inventors proposed a hinged steel reinforcement structure. Utility Model Content
[0005] The purpose of this invention is to provide a rebar structure with hinged joints to solve the problems of insufficient rebar coordination and insufficient shear resistance of existing hinged joints.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] A reinforced concrete structure with hinged joints includes a first main reinforcement, a second main reinforcement, secondary reinforcement, longitudinal stirrups, transverse stirrups, continuous reinforcement, and a hollow slab. The secondary reinforcement includes a first secondary reinforcement, a second secondary reinforcement, and a third secondary reinforcement; the longitudinal stirrups include a first longitudinal stirrup, a second longitudinal stirrup, and a third longitudinal stirrup; the transverse stirrups include a first transverse stirrup and a second transverse stirrup. Parallel to the cross-section of the hollow slab, the arrangement from top to bottom is: first main reinforcement, first secondary reinforcement, second secondary reinforcement, third secondary reinforcement, and second main reinforcement. The first longitudinal stirrups secure two first main reinforcements and two second secondary reinforcements; the second longitudinal stirrups secure two first secondary reinforcements and three secondary reinforcements; and the third longitudinal stirrups secure two second secondary reinforcements and two second main reinforcements. The first transverse stirrups secure two first longitudinal stirrups and two second longitudinal stirrups; and the second transverse stirrups secure two second longitudinal stirrups and two third longitudinal stirrups.
[0008] Furthermore, parallel to the cross-sectional direction of the hollow slab, the interval between the first main reinforcement and the third secondary reinforcement is the same and less than the interval between the second main reinforcement and the third secondary reinforcement; the first main reinforcement, the second main reinforcement, and the secondary reinforcement are parallel to the cross-sectional direction of the hinge joint, and their two ends are anchored to the hollow slab on both sides respectively.
[0009] Furthermore, the first main reinforcement to the third secondary reinforcement are located in the trapezoidal region of the hinge joint, and the second main reinforcement is located in the triangular groove region of the hinge joint.
[0010] Furthermore, the secondary reinforcement is U-shaped, and each secondary reinforcement includes two U-shaped bars with opposite opening directions, opposite arc directions, and the same horizontal height; the open ends of the U-shaped bars of each secondary reinforcement are anchored to the hollow slab on both sides respectively.
[0011] Furthermore, the longitudinal stirrups are rounded rectangles, inserted and fastened through the opening area of the U-shaped bars, with one steel bar fastened to each of the four rounded corners of each longitudinal stirrup.
[0012] Furthermore, the transverse stirrups are rounded rectangles, and the four longitudinal stirrups are respectively fastened to the four rounded corners of the transverse stirrups.
[0013] Furthermore, the hinge joint is provided with two continuous reinforcing bars symmetrically distributed along the horizontal center, in the same direction as the extension of the hollow slab.
[0014] Furthermore, the first main reinforcement, the second main reinforcement, the secondary reinforcement, the longitudinal stirrups, and the transverse stirrups form a reinforcement group; in the hinge area, several reinforcement groups are arranged along the extension direction of the hollow slab.
[0015] The beneficial effects of this utility model are:
[0016] This invention ensures the stability of the concrete at the hinge joint by setting anchor reinforcement bars at the top and bottom triangular grooves of the trapezoidal joint. By using intermittently tightened longitudinal stirrups, the force generated by the bending moment is evenly transmitted when the hinge joint is subjected to uneven bending moment from top to bottom, enhancing the synergy between the reinforcement bars. The spacing between the third secondary reinforcement bar and the second main reinforcement bar is greater than the other spacings, taking into account the special stress characteristics of the triangular groove position and enhancing the hinge joint strength. The transverse stirrups tighten the longitudinal stirrups, facilitating shear force transmission, ensuring even stress distribution on the reinforcement bars at the hinge joint, and extending service life. The use of U-shaped reinforcement bars as anchor reinforcement enhances anchorage strength. In summary, this invention enables the reinforcement bars at the hinge joint to work together under stress, enhancing shear resistance and extending the service life of the concrete beam.
[0017] Other advantages, objectives, and features of this application will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from practice of this application. The objectives and other advantages of this application may be realized and obtained through the detailed embodiments described below. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of a steel reinforcement structure with a hinge joint according to the present invention;
[0020] Figure 2 This is a schematic diagram of the reinforcing steel structure of a hinge joint according to the present invention.
[0021] Figure 3 This utility model relates to a rebar structure with a hinge joint. Figure 2 A schematic diagram of the steel reinforcement structure;
[0022] Figure 4 This utility model relates to a rebar structure with a hinge joint. Figure 3 A schematic diagram of the structure in another direction;
[0023] Figure 5 This is a schematic diagram of the steel bar anchorage in a hinged steel bar structure according to the present invention.
[0024] Among them, 1 is the first main reinforcement, 2 is the second main reinforcement, 3 is the secondary reinforcement, 4 is the longitudinal stirrup, 5 is the transverse stirrup, 6 is the continuous reinforcement, 7 is the hollow slab, 8 is the steel reinforcement group, 31 is the first secondary reinforcement, 32 is the second secondary reinforcement, 33 is the third secondary reinforcement, 41 is the first longitudinal stirrup, 42 is the second longitudinal stirrup, 43 is the third longitudinal stirrup, 51 is the first transverse stirrup, and 52 is the second transverse stirrup. Detailed Implementation
[0025] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.
[0026] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0027] This embodiment proposes a rebar structure with hinged joints, such as... Figure 1 , 2 As shown in Figure 4, the slab includes a first main reinforcement 1, a second main reinforcement 2, secondary reinforcement 3, longitudinal stirrups 4, transverse stirrups 5, continuous reinforcement 6, and a hollow slab 7. Secondary reinforcement 3 includes: a first secondary reinforcement 31, a second secondary reinforcement 32, and a third secondary reinforcement 33. Longitudinal stirrups 4 include: a first longitudinal stirrup 41, a second longitudinal stirrup 42, and a third longitudinal stirrup 43. Transverse stirrups 5 include: a first transverse stirrup 51 and a second transverse stirrup 52. Parallel to the cross-sectional direction of the hollow slab 7, the arrangement order from top to bottom is: first main reinforcement 1, first secondary reinforcement 31, second secondary reinforcement 32, third secondary reinforcement 33, and second main reinforcement 2. The first longitudinal stirrup 41 secures two first main bars 1 and two second secondary bars 32; the second longitudinal stirrup 42 secures two first secondary bars 31 and three secondary bars 33; the third longitudinal stirrup secures two second secondary bars 32 and two main bars 2; the first transverse stirrup 51 secures two first longitudinal stirrups 41 and two second longitudinal stirrups 42; the second transverse stirrup 52 secures two second longitudinal stirrups 42 and two third longitudinal stirrups 43.
[0028] like Figure 3 , 5 As shown, parallel to the cross-sectional direction of the hollow slab 7, the first main reinforcement 1 to the third secondary reinforcement 33 are spaced at the same distance, and less than the distance between the second main reinforcement 2 and the third secondary reinforcement 33. The first main reinforcement 1, the second main reinforcement 2, and the secondary reinforcement 3 are parallel to the cross-sectional direction of the hinge joint, and their ends are anchored to the hollow slab 7 on both sides. The first main reinforcement 1 to the third secondary reinforcement 33 are located in the trapezoidal region of the hinge joint, and the second main reinforcement 2 is located in the triangular groove region of the hinge joint. In use, when a vehicle passes over the surface of the hollow slab, a dynamic load is generated. One side of the beam slab undergoes deflection deformation, while the other side undergoes smaller deflection deformation. The resulting difference in deflection deformation causes the hinge joint to be subjected to transverse shear force. The first main reinforcement 1 experiences the greatest shear force, and the shear force decreases sequentially from the first main reinforcement 1 to the secondary reinforcement 3 to the second main reinforcement 2, gradually generating shear deformation. Due to the prestressed prefabricated structure, the hinge joint adopts a trapezoidal and triangular groove structure. The triangular groove is located at the bottom of the hinge joint, and the stress is relatively special. When a vehicle passes over the hinge joint, the bottom is subjected to greater pressure, and the second main reinforcement 2 undergoes downward deflection deformation. Therefore, the distance between the third secondary reinforcement 33 and the second main reinforcement 2 is greater than the distance between other anchor reinforcements, thus balancing the torque difference by increasing the lever arm. At the same time, the third longitudinal stirrup acts as a restraint, reducing downward deflection.
[0029] The secondary reinforcement 3 is a U-shaped reinforcement, with each secondary reinforcement 3 consisting of two U-shaped reinforcements with opposite opening directions, opposite arc directions, and the same horizontal height. The open ends of the U-shaped reinforcements of each secondary reinforcement 3 are anchored to the hollow slabs 7 on both sides. Under the combined effect of the lateral compression effect of vehicle load and the temperature deformation constraint effect, a lateral compression axial force will be generated at the hinge joint. The secondary reinforcement 3 uses U-shaped reinforcements, with a certain space reserved for filling with concrete, which bears the compression axial force transmitted by the secondary reinforcement 3. Since this axial force is relatively small, the pressure transmitted by the reinforcement will not affect the structural safety of the hinge joint. At the same time, the anchorage area of the U-shaped reinforcement is larger than that of the vertical reinforcement, which can provide sufficient anchorage constraint when the hinge joint is subjected to lateral shear force.
[0030] The longitudinal stirrups 4 are rounded rectangles, inserted and tightened through the opening area of the U-shaped reinforcement. Each longitudinal stirrup 4 has one steel bar tightened at each of the four rounded corners. When heavy vehicles pass over the concrete beam surface, the bending moments generated by the first main reinforcement 1, the second main reinforcement 2, and the secondary reinforcement 3 are different, resulting in vertical forces of the same direction but different magnitudes. At this time, the first longitudinal stirrup 41 tightens two first main reinforcements 1 and two second secondary reinforcements 32, the second longitudinal stirrup 42 tightens two first secondary reinforcements 31 and the third secondary reinforcement 33, and the third longitudinal stirrup tightens two second secondary reinforcements 32 and the second main reinforcement 2. Through interval tightening, the vertical forces of the first main reinforcement 1, the second main reinforcement 2, and the secondary reinforcement 3 are mutually transferred and evenly distributed, avoiding the upper layer of reinforcement being subjected to much greater stress than the lower layer of reinforcement, enhancing the synergy between the reinforcements, and extending the service life.
[0031] The transverse stirrups 5 are rounded rectangles, and four longitudinal stirrups 4 are respectively fastened to the four rounded corners of the transverse stirrups 5. When the hinge joint is subjected to transverse shear force, the anchoring reinforcement transmits the shear force to the longitudinal stirrups 4. At this time, the first transverse stirrup 51 constrains the first longitudinal stirrup 41 and the second longitudinal stirrup 42. The first transverse stirrup 51 bears the upper layer shear force of the hinge joint, and since the upper layer of concrete has a large filling volume, the shear force borne by the first transverse stirrup 51 will be partially converted into the pressure on the concrete. The second transverse stirrup 52 constrains the second longitudinal stirrup 42 and the third longitudinal stirrup 43, and the second transverse stirrup 52 bears the lower layer shear force. The transverse shear force is transmitted and distributed, and the synergistic participation of the hinge joint reinforcement in bearing the force extends the service life and ensures the safety of the hollow slab 7. Two continuous reinforcement bars 6 are provided in the hinge joint, symmetrically distributed along the horizontal center, in the same direction as the extension of the hollow slab 7. The continuous reinforcement bars 6 bear the axial force generated by longitudinal tension.
[0032] The first main reinforcement 1, the second main reinforcement 2, the secondary reinforcement 3, the longitudinal stirrups 4, and the transverse stirrups 5 form a reinforcement group 8; in the hinge area, several reinforcement groups 8 are arranged along the extension direction of the hollow slab 7. Each reinforcement group 8 bears part of the area load. During construction, multiple reinforcement groups 8 are arranged to form multiple load-bearing areas, thus extending the service life of the hollow slab 7.
[0033] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A reinforced steel structure with hinged joints, characterized in that, include: First main reinforcement (1), second main reinforcement (2), secondary reinforcement (3), longitudinal stirrups (4), transverse stirrups (5), continuous reinforcement (6), hollow slab (7). The secondary reinforcement (3) includes: the first secondary reinforcement (31), the second secondary reinforcement (32), and the third secondary reinforcement (33); the longitudinal stirrups (4) include: the first longitudinal stirrup (41), the second longitudinal stirrup (42), and the third longitudinal stirrup (43); the transverse stirrups (5) include: the first transverse stirrup (51) and the second transverse stirrup (52). Parallel to the cross section of the hollow slab (7), the arrangement order from top to bottom is: first main reinforcement (1), first secondary reinforcement (31), second secondary reinforcement (32), third secondary reinforcement (33), and second main reinforcement (2). The first longitudinal stirrup (41) fastens two first main bars (1) and two second secondary bars (32), the second longitudinal stirrup (42) fastens two first secondary bars (31) and three secondary bars (33), and the third longitudinal stirrup fastens two second secondary bars (32) and two second main bars (2). The first transverse stirrup (51) fastens two first longitudinal stirrups (41) and two second longitudinal stirrups (42), and the second transverse stirrup (52) fastens two second longitudinal stirrups (42) and two third longitudinal stirrups (43).
2. The reinforcing steel structure of the hinged joint according to claim 1, characterized in that: Parallel to the cross-sectional direction of the hollow slab (7), the first main reinforcement (1) to the third secondary reinforcement (33) are spaced at the same distance, and are less than the distance between the second main reinforcement (2) and the third secondary reinforcement (33); the first main reinforcement (1), the second main reinforcement (2), and the secondary reinforcement (3) are parallel to the cross-sectional direction of the hinge joint, and are anchored at both ends to the hollow slab (7) on both sides respectively.
3. The reinforcing steel structure of the hinged joint according to claim 2, characterized in that: The first main reinforcement (1) to the third secondary reinforcement (33) are set in the trapezoidal area of the hinge joint, and the second main reinforcement (2) is set in the triangular groove area of the hinge joint.
4. The reinforcing steel structure of the hinged joint according to claim 1, characterized in that: The secondary reinforcement (3) is a U-shaped reinforcement. Each secondary reinforcement (3) includes two U-shaped reinforcements with opposite opening directions, opposite arc directions, and the same horizontal height. The opening ends of the U-shaped reinforcements of each secondary reinforcement (3) are anchored to the hollow slabs (7) on both sides respectively.
5. The reinforcing steel structure of the hinged joint according to claim 4, characterized in that: The longitudinal stirrups (4) are rounded rectangles, which are inserted and tightened through the opening area of the U-shaped bar. Each longitudinal stirrup (4) has one steel bar tightened at each of the four rounded corners.
6. The reinforcing steel structure of the hinged joint according to claim 1, characterized in that: The transverse stirrup (5) is a rounded rectangle, and four longitudinal stirrups (4) are fastened to the four rounded corners of the transverse stirrup (5).
7. The reinforcing steel structure of the hinged joint according to claim 1, characterized in that: Two continuous reinforcing bars (6) are provided at the hinge joint, symmetrically distributed along the horizontal center, in the same direction as the hollow slab (7).
8. The reinforcing steel structure of the hinged joint according to claim 1, characterized in that: The first main reinforcement (1), the second main reinforcement (2), the secondary reinforcement (3), the longitudinal stirrups (4), and the transverse stirrups (5) form a reinforcement group (8); in the hinge area, several reinforcement groups (8) are arranged along the extension direction of the hollow slab (7).