Shear-resistant splicing joint between fabricated steel-concrete composite columns

Abstract

The utility model discloses a shear-resistant splicing joint between fabricated steel-concrete composite columns. The shear-resistant splicing joint comprises an upper steel pipe composite column, a lower steel pipe composite column, a shear-resistant connecting piece and concrete. The upper steel pipe composite column is stacked at the upper end of the lower steel pipe composite column, a joint grouting sleeve is arranged in the upper steel pipe composite column, and a concentric-square-shaped connecting flange plate is arranged between the joint grouting sleeve and the lower steel pipe composite column and welded to the two sides of the flange plate respectively. The outer wall of the joint grouting sleeve and the inner wall of the upper steel pipe composite column are both provided with anti-shear connecting pieces arranged in an array mode, the anti-shear connecting pieces on the outer wall of the joint grouting sleeve and the anti-shear connecting pieces on the inner wall of the steel pipe composite column are arranged in a staggered mode, and an inner ribbed plate is welded to the inner wall of the lower steel pipe composite column. And concrete is poured into the upper steel pipe composite column and the lower steel pipe composite column to form the shear-resistant splicing joint.

Description

TECHNICAL FIELD

[0001] The utility model belongs to building structure technical field, concretely relates to a kind of shear splicing joint between fabricated steel-concrete composite column. BACKGROUND

[0002] Compared with traditional building form, fabricated building has obvious technical advantages, which not only saves labor, cost, saves construction period, but also improves building quality, reduces emission, reduces pollution, and responds to green development. Nowadays, traditional composite structure splicing joint, such as bolt-welding mixed connection, full welding, full bolting and the like, although meets construction demand to some extent, has many deficiencies. For example, welding quality is greatly influenced by environment and construction level, which is difficult to stably control;Full bolting joint is labor-intensive and material-intensive, and the degree of fabrication is not high. In addition, these connection forms may show weak bearing capacity and stability when bearing large load or under complex working conditions. And with the development of new materials and new technologies, some new materials with excellent performance (such as ultra-high performance concrete, high ductility fiber reinforced concrete) are introduced into the design of composite structure splicing joint, which not only improves the mechanical properties and corrosion resistance of the joint, but also simplifies the construction process, improves the construction efficiency and quality. Finally, in the construction of fabricated building, the joint is not only the key part of load bearing in the structure system, but also directly affects the seismic performance and stability of the whole structure system. Therefore, it is of great significance to study how to design and construct efficient and reliable composite structure splicing joint for ensuring the safety and quality of building. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a purpose is to reduce the labor cost of construction and transportation cost, have good mechanical properties, construction performance.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of shear splicing joint between fabricated steel-concrete composite column, it is characterized in that, including upper steel pipe composite column, lower steel pipe composite column, shear connector and concrete;The upper steel pipe composite column is stacked on the upper end of lower steel pipe composite column, the node place grouting sleeve is set in the upper steel pipe composite column, the node place grouting sleeve and lower steel pipe composite column between the setting back-shaped connecting flange plate and respectively welded on the two sides of the flange plate, the node place grouting sleeve outer wall and the inner wall of upper steel pipe composite column are all set with arrayed shear connector, the shear connector on the node place grouting sleeve outer wall and the shear connector of steel pipe composite column inner wall are staggered arrangement, the inner ribbed plate of lower steel pipe composite column inner wall is welded, and the shear splicing joint is formed by pouring concrete in the upper steel pipe composite column and lower steel pipe composite column.

[0005] Preferably, the shear connector is a four-plane structure, and the two adjacent planes are vertically arranged, and the opposite two planes have the same width and different lengths.

[0006] Preferably, one end of the longest side of the shear connector is welded to the outer wall of the grouting sleeve at the node.

[0007] Preferably, the upper steel tube composite column comprises an upper steel plate shell, a grouting sleeve at a node and an upper shear connector, the outer surface of the upper steel plate shell is arrayed with shear studs and grouting holes, and the steel plate shell is internally cast with the concrete.

[0008] Preferably, the shear connector is an integrally formed structure.

[0009] Preferably, the lower steel tube composite column comprises a lower steel plate shell, an inner ribbed plate welded to the inner wall of the lower steel plate shell, the outer surface of the lower shell is arrayed with shear studs and grouting holes, and the lower steel plate shell is internally cast with the concrete.

[0010] The utility model has the following beneficial effects: first, the utility model adopts non-site welding, non-bolt connection and non-steel binding design, compared with the traditional splicing node, the node quality is higher, is less affected by the environment and construction level, is more stable and easy to control, second, compared with the full bolt connection node, the utility model saves labor and has high assembly degree, compared with the reinforced concrete node, the utility model does not need to bind steel, greatly improves the construction portability, third, the utility model adopts shear connectors and embedded screws, through the common stress of shear connectors, embedded screws and ultra-high performance concrete, the shear force resistance and force transmission are borne, the connection and the screw and ultra-high performance concrete common stress also resist the deformation of the node, improve the integrity of the splicing node, fourth, the lower column "hui" shaped end plate, lower steel tube composite column and inner ribbed plate are integrally constructed, which can guarantee the stability of the structure during the pouring of ultra-high performance concrete, plays a supporting role, and the inner ribbed plate can also reduce the buckling of the steel plate when the steel tube composite column is under compression, thereby improving the bearing capacity, fifth, the lower column welded grouting sleeve is convenient for the overall pouring of cast-in-place concrete and can be used as an ultra-high performance pouring formwork, thereby saving the use of formwork, sixth, the upper and lower column connecting part uses ultra-high performance concrete, which can improve the strength of the splicing node, the splicing node structure of the utility model can guarantee the load transmission between the steel tube concrete composite columns, has good stress performance and enhances the integrity of the splicing structure, the splicing node structure is simple and convenient to construct, and the connection between the steel-concrete composite columns can be conveniently realized, the applicability of the splicing between the steel-concrete composite columns in the prefabricated building is improved, and the splicing node structure has wide application prospect in prefabricated buildings. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to make the technical scheme of the embodiments of the present application clearer, the drawings needed in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For the first person skilled in the art, other related drawings can be obtained without creative labor on the basis of the drawings.

[0012] Figure 1 It is a perspective view of the steel pipe composite column steel plate inner shell of the present application.

[0013] Figure 2 It is a perspective view of the lower steel pipe composite column inner shell of the present application.

[0014] Figure 3 It is a perspective view of the shear connector of the present application.

[0015] Figure 4 It is a perspective view of the assembly type steel-concrete composite column inter-splicing joint structure of the present application.

[0016] Figure 5 It is a perspective view of the assembly type steel-concrete composite column inter-splicing joint structure of the present application.

[0017] Figure 6 It is a schematic view of the H-shaped connecting flange structure of the present application.

[0018] Figure 7 It is a schematic view of the inner-ribbed plate structure of the present application. DETAILED DESCRIPTION

[0019] In order to make the technical scheme of the embodiments of the present application clearer, the drawings needed in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For the first person skilled in the art, other related drawings can be obtained without creative labor on the basis of the drawings.

[0020] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0021] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0022] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For the first person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0023] In the utility model, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and oblique of the first feature above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and oblique of the first feature below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0024] Embodiment

[0025] The following is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the following examples. Any technical solution falling within the scope of the utility model is within the protection scope of the utility model.

[0026] Reference drawings Figures 1-5The utility model discloses a splicing node contains upper steel pipe superposed column 1, lower steel pipe superposed column 2, shearing connecting piece 3, super high performance concrete 4, high strength concrete 5. Upper steel pipe superposed column 1 includes upper steel plate shell 11, high ductility fiber concrete 12, upper shearing connecting piece 13, shearing bolt 15, reserved grouting hole 16 and cast-in-place core concrete 5, and lower steel pipe superposed column includes lower steel plate shell 21, high ductility fiber concrete 22, lower shearing connecting piece 23, back -shaped connecting flange plate 24, shearing bolt 25, node grouting sleeve 26, and cast-in-place core concrete 5, wherein the node grouting sleeve 26 outer wall welding shearing connecting piece 23, lower end welding back -shaped connecting flange plate 24, and the screw rod 28 of flange plate preburieng, it is worth noting that the shearing connecting piece 3 array welding on the inner and outer walls of the respective steel plate shell between upper steel pipe superposed column 1, lower steel pipe superposed column 2, so that upper steel pipe superposed column 1 and lower steel pipe superposed column 2 can be spliced together tightly, finally welding the other side of back -shaped connecting flange plate 24 on lower steel pipe superposed column 2, the back -shaped connecting flange plate 24 reference specification appendix Figure 6 The shearing connecting piece 3 at the node and the super high performance concrete 4 jointly play the role of resisting shearing and force transmission, resist the deformation of the node, and improve the integrity of the splicing node.

[0027] The construction method of the utility model includes the following two stages:

[0028] Factory prefabrication stage:

[0029] 1. Upper and lower steel pipe superposed columns:

[0030] First, according to the design calculation requirements of column section, suitable steel plate size is selected to be processed into a rectangle with suitable spacing (the suitable steel plate size refers to the steel plate size meeting the requirements of section steel ratio, namely economy and stress); second, the steel plate sides are welded together into a square section; then the upper shearing bolt 15 is welded on the upper steel plate shell 11; then the back -shaped connecting flange plate 24 is welded on the upper end of the lower steel pipe superposed column 2, the connecting flange plate 24 is welded on the lower steel plate shell 21, the lower steel plate shell 21 outer wall is welded with the arrayed lower shearing bolt 25, then the grouting sleeve 26 is welded on the connecting flange plate 24, and the screw rod 28 is preburieng on the connecting flange plate 24; finally, the upper steel plate shell 11 and the lower steel plate shell 21 are externally shored and the high ductility fiber concrete is poured, and the concrete is cured.

[0031] As shown in the specification appendix Figures 1-2As shown, before welding the upper steel plate shell 11 of the composite steel pipe column, the corresponding shear connector 3 should be welded to the inner wall of the steel plate first; when welding the lower steel pipe composite column 2, the inner rib plate 27 should be welded to the inner wall of the steel plate first, refer to the attached instruction manual. Figure 7 The inner rib plate is a planar steel plate. Subsequently, a shear connector 23 in a suitable direction is welded to the outer wall of the grouting sleeve 26 of the lower steel pipe composite column 2 (the suitable direction means that the shear connector 23 should be in the opposite direction to the shear connector 13 welded to the inner wall of the steel plate of the upper steel pipe composite column 1, which facilitates the splicing of the upper and lower steel pipe composite columns). The upper column should have a pre-reserved grouting hole, and the bolt 28 should be pre-embedded before the high ductility fiber concrete 22 is poured into the lower column 2, so that when splicing later, the bolt 28 can be grouted through the pre-reserved grouting hole 16 of the upper column 1, thereby playing an anchoring role.

[0032] Shear connectors:

[0033] As per the instruction manual Figure 3 As shown, according to the design requirements of the shear connector 3, a suitable steel plate size is selected, and the steel plate is cut and processed into a shape similar to a "hook" according to the appropriate steel plate length.

[0034] On-site construction phase:

[0035] As per the instruction manual Figures 4-5 As shown, this stage involves the prefabrication and transportation of the upper steel pipe composite column 1 and the lower steel pipe composite column 2 to the site, followed by the assembly of the prefabricated nodes. First, the upper steel pipe composite column 1 and the lower steel pipe composite column 2 are installed at the grouting sleeve 26 and externally fixed with tools. Then, ultra-high performance concrete 4 is poured on the outside of the grouting sleeve 26 at the node and into the reserved grouting hole 16. After the ultra-high performance concrete 4 has been initially cured, the core high-strength concrete 5 can be poured in place and cured. Once the concrete strength reaches the design requirements, the on-site construction stage is completed.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A shear splicing joint between fabricated steel-concrete composite columns, characterized in that, The application relates to a steel pipe composite column, which comprises an upper steel pipe composite column, a lower steel pipe composite column, shear connectors and concrete; the upper steel pipe composite column is stacked on the upper end of the lower steel pipe composite column; a grouting sleeve is arranged in the upper steel pipe composite column; a back-to-back flange plate is arranged between the grouting sleeve and the lower steel pipe composite column, and the flange plate is welded on both sides of the flange plate; shear connectors are arranged on the outer wall of the grouting sleeve and the inner wall of the upper steel pipe composite column; the shear connectors on the outer wall of the grouting sleeve and the shear connectors on the inner wall of the upper steel pipe composite column are arranged in a staggered mode; an inner ribbed plate is welded on the inner wall of the lower steel pipe composite column; and the upper steel pipe composite column and the lower steel pipe composite column are poured with concrete to form the shear splicing joint.

2. The assembled steel-concrete composite column column-to-column shear splicing joint according to claim 1, characterized in that, The shear connector is a four-plane structure, adjacent two planes are vertically arranged, and opposite two planes have the same width and different lengths.

3. The fabricated steel-concrete composite column spliced shear joint between columns according to claim 2, characterized in that, One end of the plane with the longest length of the shear connector is welded to the outer wall of the grouting sleeve.

4. The fabricated steel-concrete composite column spliced shear joint between columns according to claim 1, characterized in that, The upper steel pipe composite column comprises an upper steel plate shell, a grouting sleeve and upper shear connectors; shear bolts and grouting holes are arranged on the outer surface of the upper steel plate shell in an array mode; and the concrete is poured in the steel plate shell.

5. The fabricated steel-concrete composite column spliced shear joint between columns according to claim 2, characterized in that, The shear connector is an integrally formed structure.

6. The fabricated steel-concrete composite column spliced shear joint between columns according to claim 1, characterized in that, The lower steel pipe composite column comprises a lower steel plate shell; an inner ribbed plate is welded on the inner wall of the lower steel plate shell; shear bolts and grouting holes are arranged on the outer surface of the lower steel plate shell in an array mode; and the concrete is poured in the lower steel plate shell.

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