Welded joint construction for buildings

Abstract

The present invention discloses a welding connection structure for buildings, comprising a clamping positioning piece fixed to a main body and a connecting plate fixed to the end of a connected body, wherein the connecting plate is welded and fixed to the main body as a whole after being clamped and positioned by the clamping positioning piece. The connection structure is applicable to systems such as frame structure, frame-shear wall structure, frame-core tube structure, etc. The integral components are processed in the factory, which reduces the number of on-site workers and speeds up the construction progress; the number of steel bars in the beam-column node area is small, which is convenient for concrete pouring and has better integrity; the use of concrete beams in the frame beam section saves steel consumption; reduces the length of on-site butt welds; reduces the amount of anti-corrosion and fire-retardant coatings; does not require large-scale application of fire-retardant coatings, which reduces the difficulty of construction.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, and in particular to a welding connection structure used for buildings. Background Art

[0002] The prefabricated steel-concrete composite structure system is the most widely studied prefabricated structure system at home and abroad. Its advantages are good mechanical properties of the steel-concrete composite structure, high prefabrication rate of structural components, convenient component processing and construction, outstanding environmental protection and energy-saving performance and significant economic benefits.

[0003] In the current field of prefabricated buildings, there are only two types of connection structures: steel pipe columns and steel beams, and concrete columns and concrete beams. The first method uses a large amount of steel, and the fire retardant coating needs to be applied to more parts, which is not economical enough; the second method is more complicated to construct, the construction sequence of component nodes is complicated, there are more steel bars in the node area, and concrete pouring is more difficult, and the overall cost is higher. Summary of the invention

[0004] In view of this, the present invention provides a new type of welding connection structure for buildings, which is mainly a welding connection structure of steel pipe columns and concrete beams. The connection structure is used in systems such as frame structures, and can effectively solve the strength, rigidity and stability problems at the nodes. The components are easy to process and construct, and supports and formworks can be avoided during the construction process, thereby shortening the construction period.

[0005] The welding connection structure for buildings provided by the present invention comprises a clamping positioning piece fixed to a main body and a connecting plate fixed to the end of a connected body. The connecting plate is fixed to the main body by welding after being clamped and positioned by the clamping positioning piece.

[0006] Furthermore, the main body is a steel tube concrete column; the connected body is a concrete beam;

[0007] The plate surface of the connecting plate is perpendicular to the longitudinal reinforcement of the concrete beam and is connected and fixed to the longitudinal reinforcement of the beam.

[0008] Furthermore, the clamping positioning member is a U-shaped steel bracket welded and fixed to the steel tube concrete column, and the connecting plate is clamped and positioned on the U-shaped steel bracket and then welded and fixed to the steel tube concrete column as a whole.

[0009] Furthermore, the inner ends of the two side walls of the U-shaped steel bracket are respectively formed with sunken slots and the bottom corresponding to the slots is provided with through holes;

[0010] The connecting plate is a T-shaped steel plate, and the two wing plates of the T-shaped steel plate are correspondingly clamped in the two clamping grooves downwardly, and the lower end portion extends downwardly out of the through hole to form positioning, and then welded to the steel tube concrete column to form a whole.

[0011] Furthermore, the upper and lower ends of the T-shaped steel plate are provided with single grooves for welding and fixing, and the single groove is provided on one side where the connecting plate and the steel tube concrete column are welded.

[0012] Furthermore, the plate surface of the connecting plate is perpendicular to the longitudinal reinforcement of the concrete beam and is welded and fixed to the longitudinal reinforcement of the beam, and a gap for connection and reinforcement is reserved between the connecting plate and the beam end of the concrete beam; after the connecting plate is clamped in the U-shaped steel corbel, the corresponding part of the concrete beam is located in the U-shaped steel corbel and formed as a whole by casting in situ.

[0013] Furthermore, the steel tube concrete column is provided with open inner partitions corresponding to the top and bottom positions of the concrete beam in the horizontal direction.

[0014] Furthermore, stiffening ribs are provided between the open inner partitions at positions corresponding to the side edges of the U-shaped steel corbels.

[0015] Furthermore, the height of the U-shaped steel corbel groove is consistent with the beam height of the concrete beam, and the width of the U-shaped steel corbel groove is 2-10mm larger than the beam width of the concrete beam, so that the concrete beam can be positioned and placed into the groove of the U-shaped corbel during installation.

[0016] Beneficial effects of the present invention: The snap-on connection structure for buildings provided by the present invention is suitable for systems such as frame structures, frame-shear wall structures, and frame-core tube structures. The overall components are processed in the factory, which reduces the number of on-site workers and speeds up the construction progress; the number of steel bars in the beam-column node area is small, which is convenient for concrete pouring and has better integrity; the use of concrete beams in the frame beam sections saves steel usage; the length of on-site butt welds is reduced; the amount of anti-corrosion and fire-retardant coatings is reduced; there is no need to apply fire-retardant coatings on a large area, which reduces the difficulty of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 It is an axonometric view of the precast concrete beam-column connection node of the present invention;

[0019] Figure 2 It is an axonometric diagram of the concrete composite beam-column connection node of the present invention;

[0020] Figure 3 It is a schematic diagram of a precast concrete beam of the present invention;

[0021] Figure 4 It is a schematic diagram of a concrete composite beam of the present invention;

[0022] Figure 5 It is a cross-sectional view of a connection node of a steel tube concrete column of the present invention;

[0023] Figure 6 It is a schematic diagram of the U-shaped steel corbel of the present invention.

[0024] Among them, the above-mentioned drawings include the following figure marks: 1-steel tube concrete column; 2-precast concrete beam; 3-U-shaped steel corbel; 4-concrete composite beam; 11-opening inner partition; 12-stiffening rib; 21-connecting plate; 22-closed stirrups; 23-beam longitudinal reinforcement; 24-gate stirrup; 25-longitudinal structural reinforcement; 26-opening stirrups; 27-U-shaped stirrups; 211-wing plate; 31-slot; 32-through hole. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail below.

[0026] The welding connection structure for buildings of this embodiment comprises a clamping positioning member fixed to a main body and a connecting plate fixed to the end of a connected body. The connecting plate is fixed to the main body by welding after being clamped and positioned by the clamping positioning member.

[0027] In this embodiment, the main body is a steel tube concrete column 1 in a construction project; the clamping positioning piece fixed to the steel tube concrete column 1 is a U-shaped steel corbel 3, and the connected body is a concrete beam, which is a precast concrete beam 2 or a composite concrete beam 4; the inner ends of the two side walls of the U-shaped steel corbel 3 respectively form sunken clamping grooves 31 and the bottom corresponding to the clamping grooves is provided with through holes 32; after the concrete beam is placed in the groove of the U-shaped steel corbel 3 and clamped with the clamping groove 31 on the U-shaped steel corbel through the connecting plate 21, the connecting plate 21 is welded to the steel tube concrete column 1 and concrete is poured to form a whole.

[0028] The width of the U-shaped steel corbel 3 can be the same as the column width, and the side wall is aligned with the column edge; it can also be narrower than the column width, and the center of the steel corbel is aligned with the center of the column or one-sidedly aligned; the bottom plate and the two side plates of the U-shaped steel corbel 3 are fixed to the steel tube concrete column 1 by factory groove welding to achieve shear force transmission; the U-shaped steel corbel 3 plays the role of supporting beams, plates and casting bottom molds, further improving the overall stiffness, strength and stability after casting is completed.

[0029] In this embodiment, the connecting plate 21 is a T-shaped steel plate with wing plates 211 for installation at both ends of the top, and the upper and lower ends of the T-shaped steel plate are provided with single grooves for welding and fixing, and the single groove is provided on the side where the connecting plate is welded to the main body. The connecting plate on the concrete beam is clamped in the clamping groove 31 of the U-shaped steel bracket 3 through the wing plate 211, so as to limit the concrete beam in the length direction and the height direction, and the connecting plate is fixed on the steel tube concrete column 1 through the welding grooves at the upper and lower ends of the connecting plate, so as to form the connection structure.

[0030] In this embodiment, the plate surface of the connecting plate 21 is perpendicular to the longitudinal reinforcement 23 of the concrete beam and is fixed to the longitudinal reinforcement 23. The fixing method can be welding or sleeve form, and a gap for connection and reinforcement is left between the connecting plate 21 and the beam end of the concrete beam 2. After the concrete beam is hoisted into the U-shaped steel bracket 3 and welded in place, by pouring concrete with a higher grade than the concrete beam in the gap, the structural strength and stability of the connection structure at this location can be improved.

[0031] In this embodiment, the slot 31 is a notch arranged on the upper part of the welding side of the U-shaped steel corbel 3, and the size of the notch matches the size of the mounting portion 311 of the connecting plate. The lower part of the welding side of the U-shaped steel corbel is also provided with a through hole 32 for avoiding the connecting plate 21 and the groove of the lower end of the welding connecting plate 21.

[0032] like Figure 6 As shown, the notch size on the U-shaped steel corbel 3 matches the size of the concrete beam end plate, which is a rectangular notch of the beam end plate thickness + 5mm, so as to facilitate the hoisting of the concrete beam into place; the lower part of the U-shaped steel corbel 3 is grooved, the groove length is consistent with the bottom size of the concrete beam, and the groove width is the beam end plate thickness + 2mm, which is convenient for welding the connecting plate 21 and the steel tube concrete column 1.

[0033] In this embodiment, the precast concrete beam 2 and the concrete composite beam 5 are described respectively according to different manufacturing methods;

[0034] The upper and lower longitudinal reinforcements and stirrups of the precast concrete beam 2 are tied in the factory and poured with concrete as a whole. A section of extended steel bars is reserved at both ends without pouring concrete. The gate-shaped hoop 24 is reserved at the top of the precast concrete beam. The gate-shaped hoop 24 is set corresponding to the closed stirrup 22 of the concrete solid beam and overlapped on the stirrup of the concrete beam by welding or binding. The overall height of the connecting plate 21 is the same as the beam height, and the width below the connecting plate wing plate 211 is the same as the beam width;

[0035] The lower longitudinal reinforcement, waist reinforcement and open stirrups 26 of the concrete composite beam 5 are all tied in the factory and part of the concrete is poured (when the seismic resistance level is one or two, the grid densification area is closed stirrups 22). A section of extended steel bars is reserved at both ends of the composite beam without pouring concrete, and a certain height at the top is left without pouring concrete. After the on-site lifting is completed, the longitudinal structural steel bars 25 and U-shaped stirrups 27 are tied and poured together with the composite floor to form a whole. The height and width below the connecting plate wing 211 are the same as the width and height of the prefabricated part of the beam, and the height of the wing 211 is flush with the floor surface when the composite floor is installed.

[0036] When the precast concrete beam 2 is applied to the connection structure construction of the present invention, as shown in FIG. Figure 1As shown, the precast concrete beam 2 is installed in the groove of the U-shaped steel bracket 3 and then welded to the steel tube concrete column 1, and the longitudinal structural steel bar 25 is installed on the top of the door hoop. The two ends of the precast panels (which can be composite floor panels or matching SPD panels, etc.) are placed and erected in the horizontal erection space between the beam edge of the precast concrete beam 2 and the door hoop 24. After the panel is installed, high-grade concrete is poured between the concrete in the groove of the U-shaped steel bracket 3 and the precast panel to form a whole.

[0037] When the concrete composite beam 5 is applied to the connection structure construction of the present invention, as shown in FIG. Figure 2 As shown, after the concrete composite beam 5 is installed in the groove of the U-shaped steel corbel 3, it is welded to the steel tube concrete column 1, and the longitudinal structural steel bars 25 and U-shaped stirrups 27 used in conjunction with the composite floor are tied at the opening position of the open stirrups 24. Then, the composite floor is connected to the concrete composite beam 5 and installed, and high-grade concrete is poured between the concrete in the groove of the U-shaped steel corbel 3 and the composite floor to form a whole.

[0038] In this embodiment, the steel tube concrete column 1 is provided with open inner partitions 12 corresponding to the top and bottom positions of the concrete beam in the horizontal direction, and stiffening ribs 13 are provided between the open inner partitions at the side positions corresponding to the U-shaped steel corbels.

[0039] like Figure 5 As shown, the steel tube concrete column 1 has an open inner partition 12 welded at the top and bottom of the beam according to the beam height of the concrete beam in the column of the connection structure, which is used to increase the strength of the connection structure at this location. At the same time, the holes in the inner partition are conducive to the pouring of concrete; when the width of the U-shaped steel corbel 3 is narrower than the column width, the center of the corbel needs to be aligned with the center of the column or aligned unilaterally. At this time, it is necessary to set a stiffening rib at the position corresponding to the side of the U-shaped corbel in the column to reduce the shear force transmission of the concrete beam to the steel tube concrete column 1 at this location, and strengthen the stiffness and stability of the node at this location.

[0040] In this embodiment, the width of the U-shaped steel bracket 3 groove is 2-10mm larger than the beam width of the concrete beam, which is used for the concrete beam to be placed in the groove of the U-shaped bracket during installation. However, the height of the U-shaped steel bracket 3 groove depends on the type of concrete beam used, combined with Figure 1 and Figure 2 As shown, when a precast concrete beam 2 is used, the height of the U-shaped steel corbel 3 in the groove is consistent with the beam height of the precast concrete beam 2; when a concrete composite beam 5 is used, the height of the U-shaped steel corbel 3 in the groove is consistent with the beam height of the precast part of the concrete composite beam 5.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A welding connection structure for a building, characterized in that: It includes a clamping positioning piece fixed to the main body and a connecting plate fixed to the end of the connected body, and the connecting plate is welded and fixed to the main body as a whole after being clamped and positioned by the clamping positioning piece; The main body is a steel tube concrete column; the connected body is a concrete beam; the plate surface of the connecting plate is perpendicular to the longitudinal reinforcement of the concrete beam and is connected and fixed to the longitudinal reinforcement; the clamping positioning piece is a U-shaped steel bracket welded and fixed to the steel tube concrete column, and the connecting plate is clamped and positioned on the U-shaped steel bracket and then welded and fixed to the steel tube concrete column to form a whole; The inner ends of the two side walls of the U-shaped steel bracket are respectively formed with sunken slots, and the bottom corresponding to the slots is provided with through holes; the connecting plate is a T-shaped steel plate, and the two wing plates of the T-shaped steel plate are used to be correspondingly clamped in the two slots downward, and the lower end extends downward from the through holes to form a positioning, and then welded to the steel tube concrete column to form a whole; The upper and lower ends of the T-shaped steel plate are provided with single grooves for welding and fixing, and the single groove is provided on one side where the connecting plate is welded to the steel tube concrete column; The steel tube concrete column is provided with open inner partitions corresponding to the top and bottom positions of the concrete beam in the horizontal direction.

2. The welding connection structure for buildings according to claim 1, characterized in that: The plate surface of the connecting plate is perpendicular to the longitudinal reinforcement of the concrete beam and is welded and fixed to the longitudinal reinforcement of the beam, and a gap for connection and reinforcement is reserved between the connecting plate and the beam end of the concrete beam; after the connecting plate is clamped in the U-shaped steel corbel, the corresponding part of the concrete beam is located in the U-shaped steel corbel and is formed as a whole by casting in situ.

3. The welding connection structure for buildings according to claim 1, characterized in that: Stiffening ribs are arranged between the open inner partitions at the side positions corresponding to the U-shaped steel corbels.

4. The welding connection structure for buildings according to claim 1, characterized in that: The height of the U-shaped steel corbel groove is consistent with the beam height of the concrete beam, and the width of the U-shaped steel corbel groove is 2-10mm larger than the beam width of the concrete beam, so that the concrete beam is positioned and placed into the groove of the U-shaped corbel during installation.

Images