A hinged joint between a steel box girder and a concrete column and its construction method

Abstract

The present invention provides a hinged joint between a steel box girder and a concrete column and a construction method thereof. The hinged joint includes a concrete column and a steel box girder. The end of the steel box girder is located on the column side corbel of the concrete column, and a rubber bearing is provided between the steel box girder and the column side corbel. The steel box girder and the column side corbel are fixed by a plurality of anchor bolts, and an internal support assembly is provided inside the steel box girder in the installation area of the anchor bolts. By adopting a rubber bearing and an internal support assembly to jointly connect the steel box girder and the concrete column, the shear force transmitted by the steel box girder is transmitted, and the rotational deformation of the steel box girder in the bending direction is reasonably released, thereby improving the reliability and feasibility of the joint connection. At the same time, by means of bolt fixation, the on-site fixation of the steel box girder and the concrete column is adjusted to the inside of the steel box girder, and on-site welding operations are cancelled, which not only makes full use of the internal space of the steel box girder, solves the on-site installation space problem, but also effectively ensures the on-site construction quality and the force requirements of the components.

Description

Technical Field

[0001] The present invention belongs to the technical field of building construction, and particularly relates to a hinged joint between a steel box girder and a concrete column and a construction method thereof. Background Art

[0002] When a concrete column and a steel beam are hinged, generally, the web of the steel beam is welded to the embedded plate on the side of the concrete column, or the beam is directly placed on the bracket (or column top) on the side of the column. The first method is to weld a connecting plate on the embedded plate on the side of the column, and connect the connecting plate and the web of the steel beam through high-strength bolts or welds; the second method is similar to the connection form of a crane beam support, that is, a flat plate or a flange plate is arranged at the beam end, and then the flat plate or the flange plate is welded to the embedded plate on the bracket (or column top) of the concrete column.

[0003] However, from the structure of the hinged connection between the concrete column and the steel beam, the following disadvantages exist in the existing two connection methods:

[0004] (1) The method of welding the web of the steel beam to the embedded plate on the side of the concrete column is generally used for I-shaped cross-section beams. For box-shaped cross-sections with multiple webs, this connection method will be restricted by the width of the column; when the length or self-weight of the beam is large, the difficulty of hoisting and high-altitude installation operations will increase significantly.

[0005] (2) The method of directly placing the steel beam on the bracket (or column top) on the side of the column requires sufficient welding space for the welding of the beam end support plate and the embedded plate on the bracket (or column top); when the length of the bracket (or column top) support is too long, this connection method may also restrict the free rotation of the beam end, resulting in inconsistency with the calculation assumption. Summary of the Invention

[0006] The purpose of the present invention is to provide a hinged joint between a steel box girder and a concrete column, which solves at least some of the above technical problems.

[0007] The technical solution of the present invention provides a hinged joint between a steel box girder and a concrete column, including a concrete column and a steel box girder. The end of the steel box girder is located on the bracket on the side of the concrete column, and a rubber bearing is provided between the steel box girder and the bracket on the side of the column. The steel box girder and the bracket on the side of the column are fixed by a plurality of anchor bolts, and an internal support assembly is provided inside the steel box girder in the installation area of the anchor bolts.

[0008] Further, the steel box girder is a box-shaped structure with two open ends spliced by four steel plates.

[0009] Further, the upper and lower surfaces of the rubber bearing are adhesively fixed to the bottom surface of the steel box girder and the top surface of the bracket on the side of the column respectively by an adhesive. The anchor bolts are located outside the rubber bearing and are arranged circumferentially around it.

[0010] Further, the inner support assembly includes support stiffeners supported between the upper and lower plates of the steel box girder, and lattice stiffeners arranged on the lower plate of the steel box girder to fixedly support the stiffeners.

[0011] Further, the support stiffener is a rectangular steel plate with holes formed in the middle thereof, and hemming plates are arranged at the edges of the holes.

[0012] Further, the support stiffeners are arranged to have the same width as the interior of the steel box girder.

[0013] Further, the lattice stiffeners include two longitudinally arranged plates arranged opposite to each other, and two transversely arranged plates vertically arranged between the two longitudinally arranged plates; the two transversely arranged plates are arranged opposite to each other, and a clamping slot for clamping and fixing the support stiffeners is arranged in the middle of the transversely arranged plates along the length direction thereof.

[0014] Further, a bearing plate is arranged at the bottom of the steel box girder corresponding to the installation area of the anchor bolts, and the bearing plate is adhesively fixed to the upper surface of the rubber bearing.

[0015] Further, a pre-embedded plate is buried in the upper surface of the corbel on the side of the concrete column corresponding to the installation area of the anchor bolts.

[0016] In addition, the present invention also provides a construction method for the articulated joint between the above-mentioned steel box girder and the concrete column, including the following steps:

[0017] 1) Prefabricate the steel box girder in the factory, drill bolt holes in the lower plate of the steel box girder, and at the same time arrange an inner support assembly inside the steel box girder, and arrange a bearing plate outside the lower plate of the steel box girder corresponding to the bolt hole area.

[0018] 2) Cast the concrete column on the construction site, bury a pre-embedded plate in the upper surface of the corbel on the side of the concrete column, and reserve anchor bolts.

[0019] 3) After the concrete column reaches the age, calibrate and level the pre-embedded plate and the anchor bolts, and adhesively fix the rubber bearing in the area enclosed by the anchor bolts.

[0020] 4) Apply an adhesive to the bottom surface of the bearing plate and the top surface of the rubber bearing, hoist the steel box girder above the corbel on the side of the column, and align the bolt holes of the steel box girder with the anchor bolts on the corbel on the side of the column, and adhesively fix the bearing plate of the steel box girder to the rubber bearing on the corbel on the side of the column.

[0021] 5) Connect and fix the anchor bolts to the steel box girder inside the steel box girder, and the connection between the steel box girder and the concrete column is completed.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] (1) The articulated joint of the steel box girder and the concrete column provided by the present invention connects the steel box girder and the concrete column jointly by adopting a rubber bearing and an internal support assembly to transfer the shear force transmitted by the steel box girder, and reasonably releases the rotational deformation of the steel box girder in the bending direction, improving the reliability and feasibility of the joint connection; at the same time, by means of bolt fixation, the on-site fixation of the steel box girder and the concrete column is adjusted to the inside of the steel box girder, canceling the on-site welding operation, which not only makes full use of the internal space of the steel box girder, solves the on-site installation space problem, but also effectively guarantees the on-site construction quality and the force requirements of the components.

[0024] (2) The articulated joint of the steel box girder and the concrete column provided by the present invention solves the problem of restricting the free rotation of the end of the steel box girder due to the overlong bearing surface by adding a rubber bearing with appropriate stiffness, making the articulated connection basically consistent with the calculation assumption, and fixing the rubber bearing to the steel box girder and the concrete column by bonding, solving the problems such as difficult to guarantee the welding quality of the bearing plate of the existing steel beam and small welding space.

[0025] (3) The articulated joint of the steel box girder and the concrete column provided by the present invention optimizes the structure of the internal support assembly at the bearing position and adds an access hole to ensure the connectivity of the internal space of the steel box girder, providing sufficient operating space for on-site installation operations. At the same time, by setting a trimming plate at the edge of the hole of the bearing stiffener, the stress concentration caused by the hole opening of the bearing stiffener is solved, and steel is also saved.

[0026] The following will further elaborate on the present invention in conjunction with the accompanying drawings. Description of the Drawings

[0027] Figure 1 is the structural schematic diagram of the articulated joint of the steel box girder and the concrete column of the present invention;

[0028] Figure 2 is the front view of the articulated joint of the steel box girder and the concrete column of the present invention;

[0029] Figure 3 is Figure 2 the schematic diagram of the A-A cross-section in

[0030] Figure 4 is Figure 2 the schematic diagram of the B-B cross-section in

[0031] Figure 5 is Figure 2 the schematic diagram of the C-C cross-section in

[0032] Figure 6 is the structural schematic diagram of the bearing stiffener in the embodiment of the present invention;

[0033] Figure 7 is the structural schematic diagram of the grid stiffener in the embodiment of the present invention.

[0034] Description of reference numerals in the drawings: 1. Steel box girder; 2. Inner support assembly; 3. Rubber bearing; 4. Column side bracket; 5. Anchor bolt; 6. Support plate; 7. Embedded plate; 8. Grid stiffener; 9. Support stiffener; 10. Hole; 11. Edge closing plate; 12. Longitudinal plate; 13. Transverse plate; 14. Slot joint. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention; in the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0037] Such as Figure 1 、 Figure 2 、 Figure 5As shown in the figure, this embodiment provides a hinged joint between a steel box girder and a concrete column, including a concrete column and a steel box girder 1. The end of the steel box girder 1 is located on the column side corbel 4 of the concrete column, and a rubber bearing 3 is provided between the steel box girder 1 and the column side corbel 4. The steel box girder 1 and the column side corbel 4 are fixed by a plurality of anchor bolts 5, and an internal support assembly 2 is provided inside the steel box girder 1 in the installation area of the anchor bolts 5. In this embodiment, by using the rubber bearing 3 and the internal support assembly 2 to jointly connect the steel box girder 1 and the concrete column, the shear force transmitted by the steel box girder 1 is transmitted, and the rotational deformation of the steel box girder 1 in the bending direction is reasonably released, improving the reliability and feasibility of the joint connection; at the same time, by the way of fixing with anchor bolts 5, the on-site fixing of the steel box girder 1 and the concrete column is adjusted to the inside of the steel box girder 1, canceling the on-site welding operation, which not only makes full use of the internal space of the steel box girder 1, solves the on-site installation space problem, but also effectively guarantees the on-site construction quality and the force requirements of the components. Compared with the welding of the web of the steel beam and the embedded plate on the side of the concrete column, the connection method of this hinged joint between the steel box girder and the concrete column in this embodiment is not restricted by the cross-sectional width of the concrete column, and the accuracy requirement for on-site hoisting and positioning is significantly reduced. And because the steel box girder 1 no longer needs to be hoisted after being in place, when the beam length or self-weight is large, the difficulty of on-site hoisting and positioning and high-altitude operation is significantly reduced.

[0038] Among them, the steel box girder 1 is a box-shaped structure with both ends open, which is formed by splicing four steel plates, facilitating the connection and fixing of the steel box girder 1 and the concrete column inside the steel box girder 1, and making full use of the internal space of the steel box girder 1 to solve the on-site installation space problem. Further, a manhole can be added to the top of the steel box girder 1 to facilitate construction personnel to enter the inside of the steel box girder for construction operations.

[0039] Optimized implementation methods, such as Figure 2 , Figure 4 and Figure 5 As shown, the upper and lower surfaces of the rubber bearing 3 are adhesively fixed to the bottom surface of the steel box girder 1 and the top surface of the column side corbel 4 respectively by an adhesive. By this connection method of directly bonding the steel box girder 1 to the rubber bearing 3 on the concrete column, compared with the method of directly placing the beam on the column side corbel (or column top), it effectively solves the problems such as difficult to guarantee the welding quality and small welding space between the existing steel beam and the concrete column; at the same time, the anchor bolts 5 are arranged outside the rubber bearing 3 and are arranged along its circumferential direction. The anchor bolts 5 and the rubber bearing 3 independently support the steel box girder 1, further ensuring the free rotation of the end of the steel box girder 1, so that the hinged connection formed by the steel box girder 1 and the concrete column through the rubber bearing 3 is basically consistent with the calculation assumption.

[0040] Specifically, a bearing plate 6 is provided at the bottom of the steel box girder 1 corresponding to the installation area of the anchor bolts 5, and the bearing plate 6 is fixedly bonded to the upper surface of the rubber bearing 3; an embedded plate 7 is embedded in the upper surface of the column side bracket 4 of the concrete column corresponding to the installation area of the anchor bolts 5, and the lower surface of the rubber bearing 3 is fixedly bonded to the embedded plate 7 on the column side bracket 4.

[0041] Refine the structure of the internal support assembly, such as Figure 2 , Figure 3 and Figure 5 As shown, the internal support assembly 2 includes a support stiffener 9 supported between the upper and lower plates of the steel box girder 1, and a grid stiffener 8 provided on the lower plate of the steel box girder 1 to fix the support stiffener 9. The stress transfer on the steel box girder 1 is ensured through the setting of the stiffeners. Specifically, as Figure 6 shown, the support stiffener 9 is a rectangular steel plate, and the support stiffener 9 is arranged with the same width as the inside of the steel box girder 1. A hole 10 is opened in the middle of the support stiffener 9. By adding the hole 10, the connectivity of the internal space of the steel box girder 1 is ensured, providing sufficient operating space for on-site installation operations. Further, a trimming plate 11 is provided at the edge of the hole 10, which solves the stress concentration caused by the opening of the support stiffener 9 and also saves steel. As Figure 7 shown, the grid stiffener 8 includes two longitudinally arranged plates 12 arranged opposite to each other, and two transversely arranged plates 13 vertically arranged between the two longitudinally arranged plates 12. The two transversely arranged plates 13 are arranged opposite to each other, and a clamping slot 14 for clamping and fixing the support stiffener 9 is provided in the middle of the transversely arranged plate 13 along its length direction.

[0042] The construction method of the hinge joint between the steel box girder and the concrete column in the above embodiment specifically includes the following process:

[0043] (1) Prefabricate the steel box girder 1 in the factory, drill bolt holes on the lower plate of the steel box girder 1 according to requirements, and at the same time set the internal support assembly 2 inside the steel box girder 1, that is, weld the support stiffener 9 and the grid stiffener 8 at the designated positions, and set the bearing plate 6 at the outer part of the lower plate of the steel box girder 1 corresponding to the bolt hole area.

[0044] (2) Cast the concrete column on the construction site, embed the embedded plate 7 on the upper surface of the column side bracket 4 of the concrete column, and reserve the anchor bolts 5.

[0045] (3) After the concrete column reaches the age, calibrate and level the embedded plate 7 and the anchor bolts 5, and fixedly bond the rubber bearing 3 in the area surrounded by the anchor bolts 5 on the concrete column, and coat the four sides of the rubber bearing 3 with phenolic resin.

[0046] (4) Before the on-site hoisting of the steel box girder 1, apply adhesive to the bottom surface of the support plate 6 and the top surface of the rubber bearing 3. Hoist the steel box girder 1 to a position above the column side corbel 4, and align the bolt holes of the steel box girder 1 with the anchor bolts 5 on the column side corbel 4. Then, bond and fix the support plate 6 of the steel box girder 1 to the rubber bearing 3 on the column side corbel 4.

[0047] (5) Connect and fix the anchor bolt 5 to the steel box girder 1 inside the steel box girder 1, thus completing the connection between the steel box girder and the concrete column.

[0048] The above examples are only illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. Any design identical or similar to the present invention falls within the protection scope of the present invention.

Claims

1. A hinged joint between a steel box girder and a concrete column, comprising a concrete column and a steel box girder, Characterized in that: The end of the steel box girder is located on the column side corbel of the concrete column, and a rubber bearing is provided between the steel box girder and the column side corbel. The steel box girder and the column side corbel are fixed by a plurality of anchor bolts, and the anchor bolts are arranged outside the rubber bearing and along its circumferential direction; an internal support assembly is provided in the steel box girder at the installation area of the anchor bolts; the internal support assembly includes support stiffeners supported between the upper and lower plates of the steel box girder, and grid stiffeners provided on the lower plate of the steel box girder to fix the support stiffeners; the grid stiffeners include two longitudinally arranged plates arranged opposite to each other, and two transversely arranged plates vertically arranged between the two longitudinally arranged plates; the two transversely arranged plates are arranged opposite to each other, and a clamping slot for clamping and fixing the support stiffener is provided in the middle of the transverse plate along its length direction.

2. A hinged joint between a steel box girder and a concrete column according to claim 1, Characterized in that: The steel box girder is a box-shaped structure with both ends open, spliced by four steel plates.

3. A hinged joint between a steel box girder and a concrete column according to claim 1, Characterized in that: The upper and lower surfaces of the rubber bearing are adhesively fixed to the bottom surface of the steel box girder and the top surface of the column side corbel respectively by an adhesive. The anchor bolts are located outside the rubber bearing and are arranged along its circumferential direction.

4. A hinged joint between a steel box girder and a concrete column according to claim 1, Characterized in that: The support stiffener is a rectangular steel plate, and a hole is provided in the middle thereof, and a trimming plate is provided at the edge of the hole.

5. A hinged joint between a steel box girder and a concrete column according to claim 4, Characterized in that: The support stiffener is arranged with the same width as the inside of the steel box girder.

6. A hinged joint between a steel box girder and a concrete column according to claim 1, Characterized in that: A support plate is provided at the bottom of the steel box girder corresponding to the installation area of the anchor bolts, and the support plate is adhesively fixed to the upper surface of the rubber bearing.

7. A hinged joint between a steel box girder and a concrete column according to claim 1, Characterized in that: An embedded plate is buried on the upper surface of the column side corbel of the concrete column corresponding to the installation area of the anchor bolts.

8. A construction method of a hinged joint between a steel box girder and a concrete column according to any one of claims 1 to 7, Characterized in that, It includes the following steps: 1) Prefabricate the steel box girder in the factory, drill bolt holes on the lower plate of the steel box girder, and at the same time arrange an internal support assembly inside the steel box girder, and arrange a support plate outside the lower plate of the steel box girder corresponding to the bolt hole area; 2) Cast the concrete column on the construction site, bury the embedded plate on the upper surface of the column side corbel of the concrete column, and reserve the anchor bolts; 3) After the concrete column reaches the age, correct and level the embedded plate and the anchor bolts, and adhesively fix the rubber bearing within the area enclosed by the anchor bolts; 4) Apply an adhesive on the bottom surface of the support plate and the top surface of the rubber bearing, hoist the steel box girder above the column side corbel, and align the bolt holes of the steel box girder with the anchor bolts on the column side corbel, and adhesively fix the support plate of the steel box girder to the rubber bearing on the column side corbel; 5) Connect and fix the anchor bolts to the steel box girder inside the steel box girder, thus completing the connection between the steel box girder and the concrete column.

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