Outer steel tube downward-extending type conversion structure for circular steel tube concrete column and uniform-section reinforced concrete column

Abstract

The utility model relates to a circular steel pipe concrete column and uniform-section reinforced concrete column outer wrapping steel pipe downward-extending type conversion structure which comprises an upper steel pipe concrete column, a lower reinforced concrete column, a middle concrete beam and a column outer wrapping steel pipe. The bottom of the upper concrete-filled steel tubular column is connected with the lower reinforced concrete column, the outer side of the upper concrete-filled steel tubular column is sleeved with a column wrapping steel pipe, and the column wrapping steel pipe extends downwards to penetrate through a beam-column joint core area to a section of the upper portion of the lower reinforced concrete column. The middle concrete beam is vertically and fixedly connected with the outer side of the column wrapping steel pipe, and the distance between the bottom of the column wrapping steel pipe extending downwards and the bottom of the middle concrete beam is not smaller than two times of the diameter of the upper concrete-filled steel tubular column; the steel pipe concrete column of the starting layer is suitable for being converted with a reinforced concrete column with the equal section of a lower floor, the rigidity and the bearing capacity of the steel pipe concrete column base are guaranteed, and the steel pipe concrete column base has the advantages of being reliable in force transmission performance, simple in structure, easy and convenient to construct and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to building structure technical field, especially a circular steel pipe concrete column and equal section reinforced concrete column outer package steel pipe lower extension formula conversion structure. BACKGROUND

[0002] In the public building such as airport terminal, high-speed rail station, the use function requirement of departure layer passenger waiting or waiting hall has greater permeable space, that is, greater column spacing, greater building floor height, and the roof of the upper part mostly adopts large-span steel structure roof, and the permeability requirement of other lower floors to the use space is relatively loose. Therefore, combined with the engineering cost and the requirement of building use function, the lower floors mostly adopt the reinforced concrete frame structure with conventional column spacing, and the departure layer adopts the large-span steel column or steel pipe concrete column frame structure. In this kind of structure system, in order to improve the effective building use area of the lower floor, ensure the building use function and aesthetic property of the lower floor, the adjacent frame columns should be arranged with equal section, and the top of the lower concrete column should not be provided with too large concrete column cap. Therefore, the steel pipe concrete column of the departure layer should be converted with the equal section reinforced concrete column of the lower floor, and the stiffness and bearing capacity of the steel pipe concrete column foot should be ensured. SUMMARY

[0003] In view of the above problems, a circular steel pipe concrete column and equal section reinforced concrete column outer package steel pipe lower extension formula conversion structure is provided.

[0004] The technical scheme of the utility model is as follows: a circular steel pipe concrete column and equal section reinforced concrete column outer package steel pipe lower extension formula conversion structure, which comprises an upper steel pipe concrete column, a lower reinforced concrete column, a middle concrete beam and a column outer package steel pipe; the bottom of the upper steel pipe concrete column is connected with the lower reinforced concrete column, the outer side of the upper steel pipe concrete column is sleeved with the column outer package steel pipe, the column outer package steel pipe extends downwards through the beam-column joint core area to the upper part of the lower reinforced concrete column; the middle concrete beam is vertically fixedly connected with the outer side of the column outer package steel pipe, and the distance between the bottom of the downwardly extending column outer package steel pipe and the bottom of the middle concrete beam is not less than 2 times the diameter of the upper steel pipe concrete column.

[0005] Preferably, the column outer package steel pipe comprises an upper steel pipe concrete column outer package steel pipe and a lower extension thickened outer package steel pipe; the upper steel pipe concrete column outer package steel pipe is above the top surface of the middle concrete beam, and the lower extension thickened outer package steel pipe is below the top surface of the middle concrete beam; the wall thickness of the lower extension thickened outer package steel pipe is greater than that of the upper steel pipe concrete column outer package steel pipe.

[0006] Preferably, the upper steel pipe concrete column is provided with a lower concrete column longitudinal reinforcement outside the wall of the lower reinforced concrete column, and the top end of the lower concrete column longitudinal reinforcement extends to the middle concrete beam; the lower concrete column longitudinal reinforcement is welded to the inner wall of the column outer steel pipe, and the welding length is not less than 10 times the diameter of the lower concrete column longitudinal reinforcement.

[0007] Preferably, the inside of the middle concrete beam is provided with a short steel beam, and the short steel beam is vertically welded to the outer wall of the lower extension thickened outer steel pipe.

[0008] Preferably, the top surface and the bottom surface of the short steel beam are provided with concrete beam longitudinal reinforcements; the outer wall of the lower extension thickened outer steel pipe is provided with an outer ring plate near the top surface and the bottom surface of the short steel beam, and not less than 1 / 3 of the total number of the concrete beam longitudinal reinforcements are connected with the outer ring plate, and the remaining concrete beam longitudinal reinforcements are connected with the short steel beam.

[0009] Preferably, the inner wall of the lower extension thickened outer steel pipe is provided with an inner ring plate near the top surface and the bottom surface of the short steel beam.

[0010] Preferably, the inner ring plate is provided with a stiffening rib at the connection with the inner wall of the lower extension thickened outer steel pipe.

[0011] Preferably, the inside of the lower reinforced concrete column is provided with a cross-shaped steel skeleton in the vertical direction, the cross-shaped steel skeleton has an overlapping area with the lower extension thickened outer steel pipe in the vertical direction, the height of the overlapping area is not less than 1 times the diameter of the lower reinforced concrete column, and the cross-shaped steel skeleton extends downward to the floor or the top of the foundation.

[0012] Preferably, a vertical rib plate is arranged between the lower extension thickened outer steel pipe and the cross-shaped steel skeleton in the overlapping area.

[0013] Preferably, a plurality of shear studs are arranged at equal intervals on the outer wall of the lower extension thickened outer steel pipe near the side of the cross-shaped steel skeleton, the outer side of the flange of the short steel beam, and the lower extension thickened outer steel pipe of the intersection part of the middle concrete beam and the upper steel pipe concrete column.

[0014] The beneficial effects of the utility model lie in that: the steel pipe concrete column of the departure layer is suitable for conversion with the lower floor equal-section reinforced concrete column, the stiffness and bearing capacity of the steel pipe concrete column foot are ensured, and the utility model has the advantages of reliable force transmission performance, simple structure, simple construction and the like. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a main structure view of the utility model round steel pipe concrete column and equal-section reinforced concrete column outer steel pipe lower extension type conversion structure;

[0016] Figure 2 It is Figure 1 A-A / B-B section schematic view;

[0017] Figure 3 for Figure 1 a cross-sectional view of the middle C-C;

[0018] Figure 4 for Figure 1 a cross-sectional view of the middle D-D;

[0019] Figure 5 for Figure 1 a cross-sectional view of the middle E-E.

[0020] In the drawings, the component names corresponding to each reference numeral are as follows:

[0021] 1, upper steel pipe concrete column; 2, lower reinforced concrete column; 3, middle concrete beam; 4, column outer steel pipe; 401, upper steel pipe concrete column outer steel pipe; 402, lower extension thickened outer steel pipe; 5, short steel beam; 6, inner ring plate; 7, outer ring plate; 8, concrete beam longitudinal reinforcement; 9, stiffening rib; 10, cross-shaped stiff steel skeleton; 11, vertical rib plate; 12, lower concrete column longitudinal reinforcement; 13, shear bolt. DETAILED DESCRIPTION

[0022] The utility model will be described in detail below in combination with the drawings and specific embodiments. The embodiments are implemented on the premise of the technical scheme of the utility model, and give detailed implementation modes and specific operation processes, but the protection scope of the utility model is not limited to the following embodiments.

[0023] Referring to Figure 1 , 2 , 3, the application embodiment discloses a circular steel pipe concrete column and equal cross-section reinforced concrete column outer steel pipe extension type conversion structure, including upper steel pipe concrete column 1, lower reinforced concrete column 2, middle concrete beam 3, column outer steel pipe 4;Upper steel pipe concrete column 1 bottom is connected with lower reinforced concrete column 2, and the outer side of upper steel pipe concrete column 1 is provided with column outer steel pipe 4, and column outer steel pipe 4 extends downwards through beam-column joint core area to the upper part of lower reinforced concrete column 2;

[0024] Middle concrete beam 3 is vertically fixedly connected with the outer side of column outer steel pipe 4, and the bottom of the downwardly extending outer steel pipe 4 is at a distance not less than 2 times the diameter of the upper steel pipe concrete column 1 from the bottom of the middle concrete beam 3, and the top surface of the middle concrete beam 3 is the starting floor surface;

[0025] The column outer steel tube 4 includes an upper steel tube concrete column outer steel tube 401 and a lower extension thickened outer steel tube 402; the upper steel tube concrete column outer steel tube 401 is above the top surface of the middle concrete beam 3, and the lower extension thickened outer steel tube 402 is below the top surface of the middle concrete beam 3; the wall thickness of the lower extension thickened outer steel tube 402 is greater than the wall thickness of the upper steel tube concrete column outer steel tube 401; and the wall thicknesses are calculated and determined according to the shear bearing capacity of the beam-column joint core area and the bending-shear bearing capacity of the top end of the lower reinforced concrete column 2; so as to ensure the bending bearing capacity of the top of the lower concrete column, the shear bearing capacity of the joint core area, and the strengthening of the steel pipe structure in the conversion area;

[0026] The outer walls of the upper steel tube concrete column 1 and the lower reinforced concrete column 2 are provided with lower concrete column longitudinal reinforcement 12, one end of the top of the lower concrete column longitudinal reinforcement 12 extending to the middle concrete beam 3; the lower concrete column longitudinal reinforcement 12 is welded and connected with the inner wall of the column outer steel tube 4, and the welding length is not less than 10 times the diameter of the lower concrete column longitudinal reinforcement 12;

[0027] The inside of the middle concrete beam 3 is provided with a short steel beam 5, the cross-sectional specification of the short steel beam 5 being determined according to the equivalent strength conversion of the bending-shear bearing capacity of the reinforced concrete beam end, and the short steel beam 5 being vertically welded and connected with the outer wall of the lower extension thickened outer steel tube 402; in this embodiment, the middle concrete beam 3 and the short steel beam 5 have a total of four, and when connected with the column outer steel tube 4, a cross shape is formed;

[0028] The top surface and the bottom surface of the short steel beam 5 are provided with concrete beam longitudinal reinforcement 8; the outer wall of the lower extension thickened outer steel tube 402 is provided with an outer ring plate 7 near the top surface and the bottom surface of the short steel beam 5, and not less than 1 / 3 of the total number of the concrete beam longitudinal reinforcement 8 is welded and connected with the outer ring plate 7, and the remaining concrete beam longitudinal reinforcement 8 is lap-welded and connected with the short steel beam;

[0029] The inner wall of the lower extension thickened outer steel tube 402 is provided with an inner ring plate 6 near the top surface and the bottom surface of the short steel beam 5, and the inner ring plate 6 is provided with a stiffening rib 9 at the connection with the inner wall of the lower extension thickened outer steel tube 402;

[0030] Reference Figure 1 , 4 As shown in the figure, the inside of the lower reinforced concrete column 2 is provided with a cross-shaped steel skeleton 10 in the vertical direction, the cross-shaped steel skeleton 10 having an overlapping area with the lower extension thickened outer steel tube 402 in the vertical direction, the height of the overlapping area being not less than 1 times the diameter of the lower reinforced concrete column 2, and the cross-shaped steel skeleton 10 extending downward to the floor or the top of the foundation, so as to avoid the layer construction joint of the lower concrete column, the strength and stiffness mutation of the interlayer column, and facilitate construction;

[0031] A vertical rib plate 11 is welded between the overlapping area of the lower extension thickened outer steel tube 402 and the cross-shaped steel skeleton 10;

[0032] ReferenceFigure 1 、 5 As shown in the figure, the cruciform stiff steel skeleton 10 is close to the side of the lower extension thick outer steel pipe 402, the flange outer side of the short steel beam 5, the lower extension thick outer wall of the outer wall of the intersection part of the middle concrete beam 3 and the upper steel pipe concrete column 1, and a plurality of shear bolts 13 are arranged at equal intervals.

[0033] The beneficial effect is that the steel pipe concrete column of the departure layer is converted with the reinforced concrete column of the lower floor with the same cross section, the stiffness and bearing capacity of the steel pipe concrete column foot are ensured, and the utility model has the advantages of reliable force transmission performance, simple structure, simple construction and the like.

[0034] It should be noted that the above terms "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. The terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The meaning of "a plurality of" is two or more. "Installation", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected.

[0035] The above is only a preferred embodiment of the utility model, and is not any form or substantial limitation on the utility model. It should be noted that for ordinary skilled persons in the technical field, without departing from the utility model, a number of improvements and supplements can also be made, which should be considered as the protection range of the utility model. For those skilled in the art, without departing from the spirit and scope of the utility model, some changes, modifications and equivalent changes of the above disclosed technical content can be made, which are equivalent embodiments of the utility model; at the same time, any equivalent change, modification and evolution of the above-mentioned embodiments according to the essential technology of the utility model are still within the scope of the technical scheme of the utility model.

Claims

1. A type of transition structure where a circular steel-concrete composite column and a uniform cross-section reinforced concrete column are encased in an extended steel tube, characterized in that... It includes an upper steel-concrete composite column (1), a lower reinforced concrete column (2), a middle concrete beam (3), and a steel pipe (4) encasing the column. The bottom of the upper steel-concrete composite column (1) is connected to the lower reinforced concrete column (2). The outer side of the upper steel-concrete composite column (1) is fitted with a steel pipe (4). The steel pipe (4) extends downward through the core area of ​​the beam-column joint to the upper part of the lower reinforced concrete column (2). The middle concrete beam (3) is vertically fixed to the outer side of the steel pipe (4). The bottom of the downward-extending steel pipe (4) is not less than twice the diameter of the upper steel-concrete composite column (1) from the bottom of the middle concrete beam (3).

2. The circular steel-concrete composite column and the uniform cross-section reinforced concrete column encased in an extended steel tube transition structure according to claim 1, characterized in that, The column outer steel pipe (4) includes an upper steel pipe concrete column outer steel pipe (401) and a lower extended thickened outer steel pipe (402); the upper steel pipe concrete column outer steel pipe (401) is above the top surface of the middle concrete beam (3), and the lower extended thickened outer steel pipe (402) is below the top surface of the middle concrete beam (3); the wall thickness of the lower extended thickened outer steel pipe (402) is greater than the wall thickness of the upper steel pipe concrete column outer steel pipe (401).

3. The circular steel-concrete composite column and the uniform cross-section reinforced concrete column encased in an extended steel tube transition structure according to claim 1, characterized in that, The upper steel pipe concrete column (1) and the lower reinforced concrete column (2) are provided with lower concrete column longitudinal reinforcement (12) on their outer walls. The top end of the lower concrete column longitudinal reinforcement (12) extends to the middle concrete beam (3). The lower concrete column longitudinal reinforcement (12) is welded to the inner wall of the outer steel pipe (4) of the column, and the welding length is not less than 10 times the diameter of the lower concrete column longitudinal reinforcement (12).

4. The circular steel-concrete composite column and the uniform cross-section reinforced concrete column encased in an extended steel tube transition structure according to claim 2, characterized in that, The interior of the central concrete beam (3) is provided with a short steel beam (5), which is vertically welded to the outer wall of the lower thickened outer steel pipe (402).

5. The circular steel-concrete composite column and the uniform cross-section reinforced concrete column encased in an extended steel tube transition structure according to claim 4, characterized in that, The top and bottom surfaces of the short steel beam (5) are provided with concrete beam longitudinal reinforcement (8); the outer wall of the lower thickened outer steel pipe (402) is provided with an outer ring plate (7) near the top and bottom surfaces of the short steel beam (5), and no less than 1 / 3 of the total number of concrete beam longitudinal reinforcement (8) are connected to the outer ring plate (7), and the remaining concrete beam longitudinal reinforcement (8) are connected to the short steel beam.

6. The circular steel-concrete composite column and the uniform cross-section reinforced concrete column encased in an extended steel tube transition structure according to claim 4, characterized in that, The inner wall of the lower thickened outer steel pipe (402) is provided with an inner ring plate (6) near the top and bottom surfaces of the short steel beam (5).

7. The circular steel-concrete composite column and the uniform cross-section reinforced concrete column encased in an extended steel tube transition structure according to claim 6, characterized in that, The inner ring plate (6) is provided with stiffening ribs (9) at the connection between the inner ring plate (6) and the inner wall of the lower thickened outer steel pipe (402).

8. The circular steel-concrete composite column and the uniform cross-section reinforced concrete column encased in an extended steel tube transition structure according to claim 2, characterized in that, The interior of the lower reinforced concrete column (2) is provided with a cross-shaped stiffening steel frame (10) in the vertical direction. The cross-shaped stiffening steel frame (10) overlaps with the lower thickened outer steel pipe (402) in the vertical direction. The height of the overlapping area is not less than 1 times the diameter of the lower reinforced concrete column (2). The cross-shaped stiffening steel frame (10) extends downward to the floor or the top of the foundation.

9. The circular steel-concrete composite column and the uniform cross-section reinforced concrete column encased in an extended steel tube transition structure according to claim 8, characterized in that, A vertical rib (11) is provided between the lower thickened outer steel pipe (402) of the overlapping area and the cross-shaped stiffening steel frame (10).

10. The circular steel-concrete composite column and the uniform cross-section reinforced concrete column encased in an extended steel tube transition structure according to claim 8, characterized in that, Multiple shear studs (13) are evenly spaced on the outer wall of the lower thickened outer steel pipe (402) near the side of the cross-shaped stiffened steel frame (10) close to the lower thickened outer steel pipe (402), the outer side of the flange of the short steel beam (5), the middle concrete beam (3) intersecting with the upper steel pipe concrete column (1).

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