Self-positioning splicing joint of steel structural member and concrete member

Abstract

The utility model relates to the technical field of assembly type steel structures, in particular to a self-positioning splicing joint of a steel structural member and a concrete member. Comprising a steel pipe column, a concrete column and filler between the steel pipe column and the concrete column, the lower end of the steel pipe column is sealed by an end plate fixedly connected with the steel pipe column, a group of stiffening ribs in the axial direction of the steel pipe column are arranged in the circumferential direction of the end plate, and the stiffening ribs protrude out of the end plate downwards; an embedded steel plate is arranged on the upper portion of the concrete column along the circumferential face of the concrete column, guide steel blocks are arranged in the circumferential direction of the concrete column, and the upper end faces of the guide steel blocks have guide gradients. The lower portions of the stiffening ribs are located on the periphery of the embedded steel plate, the inner surfaces of the stiffening ribs are fixedly connected with the circumferential face of the embedded steel plate, and the guide steel blocks are located between every two adjacent stiffening ribs. A set of limiting columns are arranged at the upper end of the embedded steel plate, and the upper ends of the limiting columns are matched with the end plate. According to the utility model, the hoisting butt joint time, the labor cost and the concrete consumption can be reduced, and automatic rotation correction and accurate in-place splicing on the horizontal plane can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fabricated steel structure, especially to a self-positioning splicing joint of steel structural member and concrete member. BACKGROUND

[0002] The fabricated steel structure can greatly shorten the construction period of buildings and structures. During the construction of the concrete structure, the steel structural member can be processed and manufactured in the factory, and after the completion of the construction of the concrete structure, the steel structural member is transported to the site for installation. Since the steel structural member is generally located above the concrete member, hoisting and splicing are usually required during the installation process. The fabricated steel structure has the advantages of fast construction speed, energy saving and environmental protection, and the development of the fabricated steel structure is an urgent demand for green buildings and building industrialization in China.

[0003] At present, in the power industry: energy storage firewall architecture, offshore wind turbines, boiler body frame; in the metallurgical industry: machine head electric dust removal, hot blast stove and other single bodies, the connection of steel columns and concrete columns or steel columns and foundation short columns is involved, and the steel column is fixed on the concrete column.

[0004] In structural design, the resisting moment of the circular cross-section column is isotropic, which is more reasonable, economical and beautiful, and is favored by more and more designers.

[0005] However, at present, in the fixed connection of the circular cross-section steel pipe column and the circular cross-section concrete column, the method of embedding anchor bolts at the top of the concrete column, setting a bottom plate and a boot rib below the steel pipe column, and opening bolt holes on the bottom plate is still adopted. The steel pipe column is hoisted and then falls on the concrete column. During the hoisting process, the bolt holes of the steel pipe column bottom plate need to be aligned with the embedded anchor bolts at the top of the concrete column, which is a time-consuming and labor-consuming work that needs to be manually pulled and completed by using a crowbar. Especially in the case of high concrete columns, the hole alignment in the air is more difficult. For heavy steel columns, an electric hoist needs to be used for traction, and after adjusting the position and angle on the horizontal plane and accurately aligning the holes, the steel column can be lowered into place.

[0006] Embedding anchor bolts in the concrete column and adjusting them are also a relatively complicated work, which requires the prior preparation of a positioning steel plate. After the positioning steel plate is used, it cannot be used for other single bodies, which is relatively wasteful.

[0007] The cross-sectional size of the concrete column with anchor bolts is generally 200mm or more larger than the outer diameter size of the circular cross-section steel pipe column located above it, or even larger, which is to form a rigid connection between the steel column and the concrete column. This requires embedding the anchor bolts around the outside of the steel column. The use of anchor bolts for connection will result in a large amount of concrete and waste. Utility model content

[0008] The utility model discloses a kind of self-positioning splicing nodes of steel structure component and concrete component, which can reduce the time of hoisting, hoisting splicing labor cost of steel pipe column, and the dosage of concrete, and can realize horizontal plane automatic rotation correction, accurate in-place.

[0009] The utility model discloses a steel pipe column and concrete column and filling material between both, the lower end of steel pipe column is closed by the end plate fixedly connected with it, and a set of stiffening rib along the axial direction of steel pipe column is arranged along the circumference of end plate, and each stiffening rib projects downward on end plate;The upper portion of concrete column is provided with embedded steel plate along the peripheral surface thereof, and guide steel block is arranged along the circumference of concrete column, and the upper end surface of guide steel block is provided with guide slope;The lower portion of each stiffening rib is located around embedded steel plate, and the inner surface of the lower portion of each stiffening rib is fixedly connected with the outer peripheral surface of embedded steel plate, and guide steel block is located between two adjacent stiffening ribs;A set of protruding limit posts are arranged along the circumference on the upper end of embedded steel plate, and the upper end of limit post cooperates with end plate, and the filling material is located between the lower surface of end plate, the upper surface of concrete column and each limit post.

[0010] Further, the end plate is protruded from the steel pipe column, and the stiffening rib is in inverted L shape, the inner surface of the upper portion of the stiffening rib is fixedly connected with the outer surface of the steel pipe column, and the stepped surface of the middle portion of the stiffening rib cooperates with and is fixedly connected with the upper surface of the end plate.

[0011] Further, the embedded steel plate is composed of a set of flat plate structures or arc plate structures of embedded plates arranged along the circumference of the concrete column at intervals, the guide steel block is fixedly connected with the two adjacent embedded plates, and the limit post is located on at least a part of the embedded plates.

[0012] Further, the guide steel block is composed of two guide ribs, the two guide ribs form an included angle towards the end plate, and the distance between the outer ends of the other ends of the two guide ribs is adapted to the distance between the two adjacent stiffening ribs.

[0013] Further, the guide steel block is fixedly connected with the two adjacent embedded plates, the central axes of the two guide ribs are in the same plane or the same curved surface, and the positions of the two adjacent embedded plates connected by the two guide ribs are in axial symmetric relationship.

[0014] Further, the number of the embedded plates is the same as that of the inverted L-shaped stiffening ribs and the positions are one-to-one corresponding.

[0015] Further, the inner surface of each embedded plate is provided with a shear key at an included angle with the embedded plate at the connecting position thereof, and the upper end of the shear key is not higher than the lower end of the limit post.

[0016] Further, at least two additional stirrups formed by closed loops are arranged in the concrete column, and the same additional stirrup is welded with the embedded steel plate; the upper end of the shear key is lower than the lower end of the limiting column, and at least one additional stirrup is located between the shear key and the upper end surface of the concrete column.

[0017] Further, a lower column main reinforcement is arranged in the concrete column, and the additional stirrup is welded with the lower column main reinforcement.

[0018] Further, an outward chamfer is arranged on the inner side of the lower part of the stiffening rib.

[0019] The utility model discloses beneficial effects:

[0020] In the utility model, the steel pipe column is welded with the embedded steel plate of the concrete column through several vertical stiffening ribs, so that the rigid connection of the two is realized, and because the steel pipe column is connected by the stiffening rib, the stiffening rib can play the horizontal shear role, and it is not necessary to separately arrange the shear key for resisting the horizontal force. In addition, the embedded steel plate is firmly connected with the concrete column through the additional stirrup and the lower column main reinforcement, and is connected with the embedded part through the vertical shear key welded with the embedded part to resist the vertical shear force. The embedding and positioning of the embedded steel plate are more simple and convenient than the foundation bolt.

[0021] By arranging the outward chamfer on the inner side of the lower part of the stiffening rib, in the hoisting process, the steel pipe column and the concrete column can be aligned by naked eye observation, the stiffening rib chamfer can slide down and buckle the top of the concrete column, and in the hoisting falling process, the steel column will automatically rotate to a specific position under the influence of the self weight of the steel column, the horizontal plane is automatically rotated and corrected, and the accurate positioning is realized through the positioning guide plate. In use, because the foundation bolt is not necessary, the diameter of the concrete column can be reduced, and the concrete consumption can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the node perspective view after the steel pipe column and the concrete column of the utility model are spliced (one stiffening rib is partially cut);

[0023] Figure 2 It is the entity enlarged view of the steel pipe column in Figure 1

[0024] Figure 3 It is the perspective enlarged view of the concrete column in Figure 1

[0025] Figure 4 It is the entity enlarged view of the concrete column in Figure 1

[0026] Figure 5 It is the sectional view along A-A in Figure 2 ​​​​

[0027] Figure 6 As Figure 3 the sectional view along B-B in FIG. 1;

[0028] Figure 7 As Figure 5 the sectional view along C-C in FIG. 1;

[0029] Figure 8 As Figure 3 the enlarged view of the cooperation between the embedded plate and the shear key in FIG. 1;

[0030] Figure 9 As Figure 8 the right view of the cooperation between the embedded plate and the shear key in FIG. 1;

[0031] Figure 10 As Figure 3 the partial enlarged view of two embedded plates adjacent to each other and welded with guiding steel blocks in FIG. 1;

[0032] Figure 11 the schematic view of the internal steel bars at one end of the concrete column splice;

[0033] Wherein, 1, concrete column, 2, steel pipe column, 3, end plate, 4, stiffening rib, 5, embedded plate, 6, limiting column, 7, guiding steel block, 8, shear key, 9, additional stirrup, 10, lower column main reinforcement, 11, ordinary stirrup, 12, chamfer, 13, filler, 14, upper end surface of the concrete column, 15, guiding rib. DETAILED DESCRIPTION

[0034] Unless otherwise specified, the present application defines the inside and outside in the present embodiment by the central axis of the steel pipe column and the concrete column after cooperation, taking the side close to the central axis as the inside and the side far from the central axis as the outside. Figure 1 As shown in the figure, the present embodiment includes a steel pipe column 2 and a concrete column 1 and the filler 13 between the two, the radius r1 of the concrete column 1 is greater than the outer circle radius r2 of the steel pipe column 2; wherein the lower end of the steel pipe column 2 is closed by the end plate 3 fixedly connected thereto, a set of stiffening ribs 4 along the axial direction of the steel pipe column 1 is arranged circumferentially along the end plate 3, each stiffening rib 4 protrudes downward from the end plate 3, and the inner surface of the part of the stiffening rib 4 protruding downward from the end plate 3 is in cooperation with and fixedly connected to the concrete column 1.

[0035]

[0036] ​The end plate 3 is peripherally protruded from the steel pipe column 1, the stiffening rib 4 is in inverted L shape, the inner surface of the upper portion is fixedly connected with the outer surface of the steel pipe column 2, the stepped surface of the middle portion is matched with the upper surface of the end plate 3 and is fixedly connected with the end plate 3. Wherein, a group of inverted L shaped stiffening ribs 4 are uniformly arranged along the circumferential direction of the steel pipe column 2 and the end plate 3, the plate surface of the stiffening rib 4 is parallel to the plane formed by the axis of the steel pipe column 2 and a certain radial direction of the steel pipe column 2; the inverted L shaped stiffening rib 4 is bent in the middle portion, the stepped surface formed by the bending portion is matched with the upper surface of the portion of the end plate protruded from the steel pipe column 2 and is fixed by welding, and the inner surface of the upper portion of the stiffening rib 4 is matched with the outer surface of the steel pipe column 2 and is fixed by welding. The inner side of the lower portion of the stiffening rib 4 is provided with an outward chamfer 12, so that the initial opening of the steel pipe column 2 and the concrete column 1 is large and easy to butt joint, and the chamfer 12 plays a guiding role when the butt joint is inserted downward after the butt joint.

[0037] The radius r3 of the end plate 3 is greater than the outer radius r2 of the steel pipe column 2, the bending length (i.e. the matching length of the stepped surface of the middle portion of the stiffening rib 4 and the upper surface of the end plate 3) la of the inverted L shaped stiffening rib 4 is r3-r2; the relationship among the bending length la of the inverted L shaped stiffening rib 4, the outer radius r2 of the steel pipe column 2 and the radius r1 of the concrete column 1 is la+r2≥r1.

[0038] The concrete column 1 of the embodiment comprises a pre-embedded steel plate, a limiting column 6, a guide steel block 7, a shear key 8, an additional stirrup 9, a lower column main reinforcement 10 and a common stirrup 11, so that the concrete column is formed after the mutual fixation and the pouring of concrete. The pre-embedded steel plate is arranged on the upper portion of the concrete column 1 along the circumferential surface, the guide steel block 7 is arranged along the circumferential direction of the concrete column 1, the upper end surface of the guide steel block 7 is provided with a guide slope; the lower portion of each stiffening rib 4 is located around the pre-embedded steel plate, the inner end surface of each stiffening rib 4 is fixedly connected with the circumferential surface of the pre-embedded steel plate, and the guide steel block 7 is located between the adjacent two stiffening ribs 4; a group of protruding limiting columns 6 are arranged on the pre-embedded steel plate 7 along the circumferential direction, the upper end of the limiting column 6 is matched with the end plate 3, and the filling material is located between the lower surface of the end plate 3, the upper surface of the concrete column 1 and each limiting column 6.

[0039] The pre-embedded steel plate is composed of a group of pre-embedded plates 5 in flat plate structure or arc plate structure which are arranged along the circumferential direction of the concrete column at intervals, the number of the pre-embedded plates 5 is the same as that of the inverted L shaped stiffening ribs 4 and the positions are one-to-one corresponding, the inner surface of the lower portion of each stiffening rib 4 is respectively fixed by welding at the matching position with the outer surface of each corresponding pre-embedded plate 5, so as to realize the fixation between the steel pipe column 2 and the concrete column 1. The vertical length lb of the inner surface of the lower portion of the stiffening rib 4 matched with the outer circumferential surface of the pre-embedded steel plate (i.e. the outer surface of the pre-embedded plate 5) is not less than the sum of the height h of the limiting column 6 and the vertical distance from the lowest point of the guide steel block 7 to the upper end surface 14 of the concrete column.

[0040] The embedded steel plate can also be made of a steel pipe that is compatible with the thickness of the concrete column 1, but the embedded steel plate is composed of a flat plate structure or an arc-shaped plate structure, which can not be limited by the size of the concrete column 1, and different numbers of embedded plates 5 can be used according to the thickness of the concrete column 1.

[0041] The fixing between the steel pipe column 2 and the concrete column 1 in the embodiment mainly relies on the welding fixing of the stiffening rib 4 and the embedded steel plate. The outer side of the embedded steel plate is mainly subjected to vertical shear force. Therefore, the inner surface of each embedded plate 5 is provided with a shear key 8 that is at an angle with the embedded plate 5 at the connection position thereof, and the shear key 8 is vertically and centrally arranged on the inner surface of the embedded plate 5 and is generally vertically arranged and fixed by welding, so that the effect of resisting the vertical shear force of the outer side is best, and the upper end of the shear key 8 is not higher than the lower end of the limiting column 6.

[0042] Among them, the arrangement of the multiple inverted L-shaped stiffening ribs 4 not only plays a role in transmitting vertical shear force, but also well bears the role of resisting horizontal shear force, which makes it unnecessary to separately arrange horizontal shear keys at the bottom of the end plate 3 of the steel pipe column 2, and it is also unnecessary to arrange shear grooves on the upper end surface of the concrete column 1.

[0043] The concrete column 1 is provided with at least two additional stirrups 9 formed by closed rings, and the same additional stirrup 9 is welded with the embedded steel plate. In the embodiment, the inner side of the embedded steel plate is fully welded with the additional stirrup 9 inside the concrete column 1, and the two ends of the additional stirrup 9 are closed and welded, and double-sided welding lap joint can be adopted. The diameter of the additional stirrup 9 is not less than 8 mm, and there are not less than two. When the upper end of the shear key 8 is lower than the lower end of the limiting column 6, at least one additional stirrup 9 is located between the shear key 8 and the upper end surface 14 of the concrete column.

[0044] The concrete column 1 is provided with a lower column main reinforcement 10, which is uniformly arranged along the circumference of the concrete column 1, and the additional stirrup 9 is welded with the lower column main reinforcement 10. Because the embedded steel plate is fully welded with the additional stirrup 9, and the additional stirrup 9 is firmly welded with the lower column main reinforcement 10, it itself well plays the role of anchoring the embedded steel plate, which is more direct and reliable than the existing technology of welding vertical anchor bars or vertical bent anchors on the inner side of the embedded steel plate.

[0045] The upper end of the embedded steel plate is provided with a set of protruding limiting columns 6 in the circumferential direction, the limiting columns 6 are located on at least one part of the embedded plate 5, and the embedded plate 5 and the limiting column 6 can be integrally manufactured or fixed by welding. In this embodiment, the upper end of the four embedded plates 5 is provided with an integrally manufactured limiting column 6, the height h of the limiting column 6 is not greater than 50 mm, is perpendicular to the upper end surface 14 of the concrete column, is uniformly arranged along the periphery of the upper end surface 14 of the concrete column, and the number of the limiting columns 6 is not less than 3, the upper end of the limiting column 6 cooperates with the end plate 3, so that the steel pipe column 2 and the concrete column 1 are stably connected; after the steel pipe column 2 and the concrete column 1 are connected, the gap between the lower surface of the end plate 3, the upper end surface 14 of the concrete column and each limiting column 6 is filled with a filling material 13, and the filling material 13 can be shrinkage-free fine stone concrete or grouting material.

[0046] In this embodiment, a guide steel block 7 is arranged along the circumferential direction of the concrete column 1, the guide steel block 7 is fixedly connected with the adjacent two embedded plates 5, and the guide steel block 7 is located between the adjacent two stiffening ribs 4; the guide steel block 7 is composed of two guide ribs 15, the two guide ribs 15 form an included angle towards the end plate 3, and the distance between the outer ends of the other ends of the two guide ribs 15 is adapted to the distance between the adjacent two stiffening ribs 4. Among them, the central axes of the two guide ribs 15 are in the same plane or the same curved surface, and the positions of the adjacent two embedded plates 5 connected by the two guide ribs 15 are in an axisymmetric relationship (that is, the central line of the gap between the two embedded plates 5 connected by the two guide ribs 15 is the axis of symmetry).

[0047] The ends of the two guide ribs 15 towards the end plate intersect on the axis of symmetry between the adjacent two embedded plates 5 and are fixedly welded, the other ends of the two guide ribs 15 are away from each other and are located between the two stiffening ribs 4 matched with the adjacent two embedded plates 5, and are fixedly welded with the adjacent two embedded plates 5, and form an included angle towards the end plate 3, that is, the included angle is ≤90°; the relationship between the clear distance 1c between the end of the guide rib 15 welded with the embedded plate 5 and the central axis of the embedded plate 5 welded with it and the thickness 1d of the ribbed plate 4 is: 5mm≥1c-1d / 2≥1mm. Thus, when the steel pipe column 2 is connected with the concrete column 1, the positioning is ensured to be accurate, so as to achieve the purpose that the stiffening ribs 4 on the steel pipe column 2 are aligned with the centers of the embedded plates 5 on the concrete column 1, so that the vertical shear effect can be best.

[0048] In use, the concrete column 1 is embedded with the steel plate, the shear key 8, the limiting column 6, the guide steel block 7, the additional stirrup 9, the lower column main reinforcement 10 and the common stirrup 11 according to the above scheme, and then the concrete is poured to form the concrete column 1. When the concrete reaches a certain strength, the steel pipe column 2 is hoisted above the concrete column 1. After the outer side of the chamfer of the several stiffening ribs 4 completely wraps the upper end surface 14 of the concrete column by visual observation, the steel pipe column 2 is slowly lowered. Under the influence of the self-weight of the steel pipe column 2, the steel pipe column 2 is automatically rotated to a specific position. When the stiffening ribs 4 on the steel pipe column 2 are aligned with the center of the embedded steel plate on the concrete column 1, the upper end of the concrete column 1 is buckled by the several stiffening ribs 4 at the end of the steel pipe column 2. Until the end plate 3 is tightly attached to the top of the limiting column 6, the lowering is stopped. One side of the stiffening rib 4 is fully welded with the embedded steel plate, and the end plate 3 is not connected with the limiting column 6 in any form. The gap between the end plate 3 and the upper end surface 14 of the concrete column is filled with shrinkage-free fine stone concrete or grouting material.

[0049] Due to the use of the chamfer inside the stiffening rib 4 and the guide steel block at the same time, the use of manpower for traction calibration is avoided or reduced, so that the hoisting and assembling process is safer, more economical and more efficient. And because the anchor bolt is not needed, the diameter of the concrete column 1 can be reduced, and more concrete can be saved.

Claims

1. A self-positioning splicing joint of a steel structural member and a concrete member, comprising a steel pipe column and a concrete column and a filler between the two, characterized in that: The lower end of the steel pipe column is closed by an end plate fixedly connected with the steel pipe column, a set of stiffening ribs along the axial direction of the steel pipe column is arranged along the circumference of the end plate, and each stiffening rib protrudes downward from the end plate; a pre-embedded steel plate is arranged along the circumferential surface of the concrete column, guide steel blocks are arranged along the circumference of the concrete column, and the upper end surface of each guide steel block is provided with a guide slope; the lower part of each stiffening rib is located around the pre-embedded steel plate, the inner surface of the lower part of each stiffening rib is fixedly connected with the outer side of the circumferential surface of the pre-embedded steel plate, and the guide steel blocks are located between adjacent two stiffening ribs; a set of protruding limiting columns are arranged on the upper end of the pre-embedded steel plate along the circumference, the upper end of the limiting column is matched with the end plate, and the filling material is located between the lower surface of the end plate, the upper surface of the concrete column and each limiting column.

2. The self-locating spliced joint of steel structural member and concrete member according to claim 1, characterized in that: The end plate protrudes around the steel pipe column, and the stiffening rib is in an inverted L shape, the inner surface of the upper part of the stiffening rib is fixedly connected with the outer surface of the steel pipe column, and the stepped surface of the middle part of the stiffening rib is matched with and fixedly connected with the upper surface of the end plate.

3. The self-locating spliced joint of a steel structural member and a concrete member according to claim 1 or 2, characterized in that: The pre-embedded steel plate is composed of a set of pre-embedded plates in flat plate structures or arc-shaped plate structures arranged at intervals along the circumference of the concrete column, the guide steel block is fixedly connected with the adjacent two pre-embedded plates, and the limiting column is located on at least part of the pre-embedded plates.

4. The self-locating spliced joint of steel structural member and concrete member according to claim 3, characterized in that: The guide steel block is composed of two guide ribs, the two guide ribs form an included angle towards the end plate, and the outer end distance of the other end of the two guide ribs is adapted to the distance between the adjacent two stiffening ribs.

5. The self-locating spliced joint of steel structural member and concrete member according to claim 4, characterized in that: The guide steel block is fixedly connected with the adjacent two pre-embedded plates, the central axes of the two guide ribs are in the same plane or the same curved surface, and the positions of the two guide ribs on the adjacent two pre-embedded plates are in an axial symmetric relationship.

6. The self-locating spliced joint of steel structural member and concrete member according to claim 3, characterized in that: The stiffening rib is in an inverted L shape, and the number of the pre-embedded plates is the same as that of the stiffening ribs and corresponds to the stiffening ribs one by one.

7. The self-locating spliced joint of steel structural member and concrete member according to claim 3, characterized in that: The inner surface of each pre-embedded plate is provided with a shear key at an included angle with the pre-embedded plate at the connection position of the pre-embedded plate, and the upper end of the shear key is not higher than the lower end of the limiting column.

8. The self-locating spliced joint of a steel structural member and a concrete member according to claim 7, characterized in that the concrete At least two additional stirrups composed of closed rings are arranged in the column, the same additional stirrup is welded with the pre-embedded steel plate, the upper end of the shear key is lower than the lower end of the limiting column, and at least one additional stirrup is located between the shear key and the upper end surface of the concrete column.

9. The self-locating spliced joint of a steel structural member and a concrete member according to claim 8, characterized in that the concrete A lower column main reinforcement is arranged in the column, and the additional stirrup is welded with the lower column main reinforcement.

10. The self-locating spliced joint of a steel structural member and a concrete member according to claim 1 or 2, characterized by: The inner side of the lower part of the stiffening rib is provided with an outward chamfer.

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