Hinged connection structure of precast beam and precast column

Abstract

The utility model discloses a hinged connection structure of a precast beam and a precast column, which comprises a column body and a floor beam, a bracket is arranged on the column body, and one end of the floor beam is arranged on the bracket; the beam bottom is in welded connection with the bracket top embedded part and the beam bottom embedded part through a base plate; the column body is connected with the floor beam through a connecting piece; the connecting piece comprises a sleeve embedded in the floor beam, a bolt arranged in the sleeve and an angle steel plate arranged on the side wall of the floor beam, a long round hole is formed in the angle steel plate, the exposed head end of the bolt is limited in the long round hole in a matched sliding mode through a base plate, and the side end of the angle steel plate is connected with an embedded piece on the upper side portion of the column body. The connecting piece structure is additionally arranged at the connecting position of the floor beam and the column, the long round hole in the connecting piece is matched with sliding limiting connection of the bolt preset at the beam end, horizontal constraint and vertical constraint of the upper portion of the beam end are released, bending moment cannot be generated at the beam end, and therefore beam-column hinging is achieved.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a hinged connection structure for precast beams and precast columns. Background Technology

[0002] When a floor beam bears a gravity load, deflection will occur at the mid-span of the beam, and the beam end will rotate around the bottom connection (the bottom is a base plate welded to the upper and lower embedded parts). Vertical and horizontal displacements will occur at the upper part of the beam end, with the horizontal displacement Δx being much larger than the vertical displacement Δz. A concentrated force in the Z-direction, perpendicularly downwards, will be generated at the beam end; this force is transmitted to the column bracket through the welded connection of the base plate at the bottom of the beam.

[0003] Under horizontal seismic forces, concentrated forces in both the X and Y directions in the horizontal plane are generated at the beam ends, which are transmitted to the column brackets through the welded connection of the base plate at the bottom of the beam. Simultaneously, the forces are transmitted to the column through the connector between the upper end of the beam and the column. To achieve a hinged beam-column connection, where the beam rests on the column brackets, the beam ends are allowed to rotate in the vertical plane.

[0004] In conventional connections, the embedded parts at the bottom of the beam are typically welded to the embedded parts at the top of the corbel using a shim plate (see...). Figure 7 At point B in the middle section, the embedded parts on the top of the beam are welded to the embedded parts on the side of the column via connecting plates (see...). Figure 7 At point C, this connection can constrain translation in three directions without any problem. However, the top and bottom connectors prevent the beam end from rotating in the vertical plane, generating a bending moment at the beam end. This will produce a large horizontal tensile force on the top connector, which may cause damage if the tensile force is too large. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an improved hinged connection structure for precast beams and precast columns in order to overcome the shortcomings of the existing technology.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a hinged connection structure of precast beam and precast column, including column body and floor beam, wherein a corbel is provided on the column body, and one end of the floor beam is provided on the corbel; the column and the floor beam are connected by a connector.

[0007] The connecting component includes a sleeve embedded in the floor beam, a bolt installed in the sleeve, and an angle steel plate installed on the side wall of the floor beam. The angle steel plate has an elongated hole. The bolt slides within the elongated hole through the cooperation of its exposed end with the outer side of the elongated hole on one leg of the angle steel plate, the polytetrafluoroethylene plate, and the pad. The other leg of the angle steel plate is welded to the embedded part on the upper side of the column.

[0008] The outer diameter of the pad is larger than the short diameter of the oblong hole. The exposed end of the bolt is blocked by the pad outside the oblong hole. The oblong hole on the angle steel plate provides a certain space for horizontal displacement of the bolt, so that the beam end can rotate slightly in the horizontal direction without affecting the tensile and compressive support of the bolt on the side of the beam.

[0009] The connector is located at the top of the beam. Utilizing the elongated hole in the connecting plate, the horizontal constraint at the upper part of the beam end is released, preventing bending moments from occurring at the beam end. The bolt can slide freely within the elongated hole, while still providing out-of-plane horizontal Y-axis constraint to transmit horizontal forces. At this point, all horizontal forces in the X-axis direction along the beam's length are transmitted through the weld at the bottom of the beam. Additionally, a small amount of Z-axis displacement occurs during beam end rotation; therefore, the diameter of the elongated hole in the other direction must be appropriately enlarged compared to the bolt diameter to allow for free sliding in the Z-axis as well.

[0010] Furthermore, the floor beam described in this utility model is a middle beam or an edge beam.

[0011] Furthermore, in the side beam structure, a sleeve with an internal thread structure is pre-embedded inside one side of the column, or a sleeve without an internal thread structure is pre-embedded through the column and connected with bolts with end plates.

[0012] Furthermore, in the central beam structure, the sleeve is embedded through the column body.

[0013] Since connectors can only be installed on the inner side of the edge beams, pre-embedded connecting sleeves are installed inside the beams and screwed in with ordinary bolts. Connectors are installed on both sides of the middle beams, so sleeves are installed inside the beams and threaded rods are inserted through them, connecting to the pre-embedded parts on the column sides through angle steel connectors.

[0014] Furthermore, the angle steel plate described in this utility model is also provided with triangular stiffening ribs.

[0015] The beneficial effects of this utility model are as follows: By adding a connecting structure at the connection between the floor beam and the column, and using the elongated hole on the connecting piece to cooperate with the sliding limit connection of the pre-set bolt at the beam end, the horizontal constraint at the upper part of the beam end is released, and no bending moment is generated at the beam end. At the same time, the bolt can still provide horizontal Y-direction constraint outside the beam plane to transmit horizontal force, thus solving the problems existing in the prior art. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 yes Figure 1 Enlarged view of point A in the image;

[0019] Figure 3 This is an installation structure diagram of the floor beam in this utility model, where the beam is a central beam structure.

[0020] Figure 4 This is a schematic diagram of the hinged rotational displacement of the floor beam end in Embodiment 1 of this utility model;

[0021] Figure 5 This is an installation structure diagram of the floor beam in this utility model as an edge beam structure;

[0022] Figure 6 This is a schematic diagram of the structure of the present invention, which uses bolts with end plates for installation in Embodiment 2;

[0023] Figure 7 This is a schematic diagram of a conventional connection structure for floor beams in the background technology.

[0024] The following are the labels in the diagram: 1. Column, 2. Floor beam, 3. Corbel, 4. Sleeve, 5. Bolt, 6. Angle steel plate, 7. Oblong hole, 8. Pad, 9. Embedded part, 10. Triangular stiffening rib, 11. Bolt with end plate, 12. Polytetrafluoroethylene plate. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Example 1

[0027] like Figures 1-4 The diagram shows a hinged connection structure between a precast beam and a precast column, including a column 1 and a floor beam 2. A corbel 3 is provided on the column, and one end of the floor beam 2 is provided on the corbel 3. The column 1 and the floor beam 2 are connected by a connector.

[0028] The connecting components include a sleeve 4 pre-embedded in the floor beam 2, a bolt 5 installed in the sleeve 4, and an angle steel plate 6 installed on the side wall of the floor beam 2. The angle steel plate 6 has an elongated hole 7. The bolt 5 slides within the elongated hole 7 through its exposed end and the cooperation of the outer side of the elongated hole 7 on one leg of the angle steel plate 6, the polytetrafluoroethylene plate 12, and the pad 8. The other leg of the angle steel plate 6 is welded to the pre-embedded part 9 on the upper side of the column 1.

[0029] The floor beam 2 is a central beam installation structure, and the sleeve 4 is embedded through the column 1. Triangular stiffening ribs 10 are also provided on the angle steel plate 6.

[0030] like Figure 4 As shown, the schematic diagram of the hinged rotation displacement of the floor beam is as follows: the dashed line is the position after displacement, "C" is the rotation point, △x is the horizontal displacement, △z is the vertical displacement, and f is the deflection at the mid-span of the beam.

[0031] Example 2

[0032] like Figure 5 As shown, the floor beam 2 is a side beam installation structure, and a sleeve 4 with internal thread is pre-embedded inside one side of the column 1. Other connection structures are the same as in Embodiment 1.

[0033] Alternatively, a sleeve 4 without internal threads can be used to penetrate and be embedded in the column 1, and connected with a bolt 11 with an end plate (see...). Figure 6 ).

[0034] The connector in this invention is located in the upper middle part of the floor beam. By utilizing the elongated hole of the connecting plate, the horizontal and vertical constraints at the upper part of the beam end are released, and no bending moment is generated at the beam end. The bolt can slide freely in the elongated hole, while the bolt can still provide horizontal constraints in the Y direction outside the beam plane to transmit horizontal force. At this time, the horizontal force in the X direction along the beam length is transmitted through the bottom weld of the beam.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hinged connection structure of a precast beam and a precast column, characterized by: It includes a column (1) and a floor beam (2), wherein a corbel (3) is provided on the column, and one end of the floor beam (2) is provided on the corbel (3); the column (1) and the floor beam (2) are connected by a connector; The connecting component includes a sleeve (4) pre-embedded in the floor beam (2), a bolt (5) installed in the sleeve (4), and an angle steel plate (6) installed on the side wall of the floor beam (2). The angle steel plate (6) has an elongated hole (7). The bolt (5) slides within the elongated hole (7) of one leg of the angle steel plate (6) through the cooperation of its exposed end with the outer side of the elongated hole (7), the polytetrafluoroethylene plate (12), and the pad (8). The other leg of the angle steel plate (6) is welded to the pre-embedded part (9) on the upper side of the column (1).

2. The articulated connection structure of a precast beam and a precast column according to claim 1, characterized in that: The floor beam (2) mentioned above is either a middle beam or an edge beam.

3. The articulated connection structure of a precast beam and a precast column according to claim 2, characterized in that: In the side beam structure, a sleeve (4) with an internal thread structure is pre-embedded inside one side of the column (1), or a sleeve (4) without an internal thread structure is pre-embedded inside the column (1) and connected with a bolt (11) with an end plate.

4. The hinged connection structure of a precast beam and a precast column according to claim 2, characterized in that: In the central beam structure, the sleeve (4) is embedded through the column (1).

5. The articulated connection structure of a precast beam and a precast column according to claim 1, characterized in that: The angle steel plate (6) is also provided with triangular stiffening ribs (10).

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