Steel structure column base node structure at top of basement

Abstract

The utility model relates to the technical field of building structures, and provides a steel structure column base node structure at the top of a basement, which comprises an upper-layer steel structure column, a wrapped reinforced concrete column base, a reinforced concrete column transition section and a lower-layer reinforced concrete column, a reinforced concrete column transition section and a lower-layer reinforced concrete column are sequentially arranged below the externally-wrapped reinforced concrete column foot; the upper-layer steel structure column extends into the externally-wrapped reinforced concrete column base and extends to the bottom of the externally-wrapped reinforced concrete column base; the central axis of the upper-layer steel structure column is aligned with the center of the central axis of the externally-wrapped reinforced concrete column foot; a column base bottom plate is arranged at the bottom of the upper-layer steel structure column; and the column base bottom plate is connected with the reinforced concrete column transition section. The structure space of the top of the basement can be fully utilized, meanwhile, the requirement for wrapping the column foot with the steel structure is met, and material waste caused by the overlarge section of the basement column is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to building structure technical field especially relates to a steel structure column foot node structure of basement top. BACKGROUND

[0002] More and more public building ground parts adopt steel structure system, but the basement still adopts reinforced concrete structure system, and the connection of two different structures often makes the design of steel structure column foot meet difficulties.

[0003] The steel structure column foot of conventional design adopts the reinforced concrete column foot of outer package, and the traditional reinforced concrete column foot of outer package requires that the reinforced concrete column outside package is adopted in the range from the top of the foundation to the bottom of the steel column on the ground, and needs to satisfy certain construction requirements, which makes the cross section size of the concrete column under the steel column be large when there is the lower basement, can influence the use function of the building, and the steel column extends downwards for a long length, which causes the waste of engineering materials to a certain extent. INNOVATION CONTENT

[0004] The utility model mainly solves the technical problem that the cross section size of the concrete column under the steel column is large when the traditional reinforced concrete column foot of outer package has the lower basement, can influence the use function of the building, and puts forward a steel structure column foot node structure of basement top, which can fully utilize the structural space of the top of the basement, satisfy the demand of the steel structure outer package column foot at the same time, and avoid the material waste caused by the large basement column cross section.

[0005] The utility model provides a steel structure column foot node structure of basement top, which comprises: an upper steel structure column, an outer package reinforced concrete column foot, a reinforced concrete column transition section and a lower reinforced concrete column.

[0006] A reinforced concrete column transition section and a lower reinforced concrete column are sequentially arranged below the outer package reinforced concrete column foot.

[0007] The upper steel structure column extends into the outer package reinforced concrete column foot and extends to the bottom of the outer package reinforced concrete column foot, and the central axis of the upper steel structure column and the outer package reinforced concrete column foot is aligned.

[0008] A column foot bottom plate is arranged at the bottom of the upper steel structure column, and the column foot bottom plate is connected with the reinforced concrete column transition section.

[0009] Preferably, the width of the reinforced concrete column transition section gradually decreases from top to bottom.

[0010] Preferably, a plurality of densified stirrups are arranged at the lower end of the reinforced concrete column transition section.

[0011] Preferably, the column foot bottom plate is connected with the reinforced concrete column transition section by anchor bolts.

[0012] Preferably, the upper steel structure column is filled with fine stone concrete.

[0013] Preferably, the upper steel structure column is provided with multiple shear bolts in the range of the outer reinforced concrete column foot in the circumferential direction.

[0014] Preferably, the outer reinforced concrete column foot is arranged on the top of the basement, and the top of the outer reinforced concrete column foot is at the same elevation as the top of the basement.

[0015] Preferably, the upper steel structure column is provided with a transverse stiffening rib at the top of the outer reinforced concrete column foot, and exhaust holes are arranged on the transverse stiffening rib.

[0016] Compared with the prior art, the steel structure column foot node structure of the basement top provided by the utility model has the following advantages:

[0017] 1. The utility model adopts an innovative construction node method, only makes an outer column foot node in a certain range of height of the top of the basement, sets a variable cross-section reinforced concrete column transition section, a diamond-shaped dense stirrup and other technical means, ensures that the steel structure column foot node structure realizes the technical effect while keeping the bearing capacity and node stiffness of the structure from being weakened.

[0018] 2. The upper steel structure column and the lower reinforced concrete column are connected to each other to form an outer reinforced concrete column foot, the upper section of the lower reinforced concrete column is locally increased, the structural space of the upper part of the basement is fully utilized, the building function of the basement is not affected, the demand of the building function is fully met, the demand of the outer steel structure column foot is met, the inconvenience caused by the excessively large basement column section and the material waste are avoided, and good economic benefit and social benefit are obtained.

[0019] 3. The traditional variable cross-section node suddenly changes the column section below the steel column foot, the stiffness and bearing capacity of the reinforced concrete column are suddenly changed, and the structure system forms a weak part. The utility model innovatively adopts the construction method of the variable cross-section transition section of the reinforced concrete column, the column section is smoothly and continuously transitioned from the large section of the outer reinforced concrete column foot to the small section of the lower reinforced concrete column, the longitudinal reinforcement of the reinforced concrete column is also continuously transitioned, and the dense and reinforced stirrups are arranged at the lower end of the transition section of the reinforced concrete column, so that the stiffness and bearing capacity of the reinforced concrete column are smoothly and continuously transitioned. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the steel structure column foot node structure of the basement top provided by the utility model;

[0021] Figure 2 is Figure 1 a sectional view of line A-A in Fig.

[0022] Attached reference numerals: 1. Upper steel structure column; 2. Lower reinforced concrete column; 3. Outer reinforced concrete column base; 4. Reinforced concrete column transition section; 5. Column base plate; 6. Anchor bolt; 7. Shear stud; 8. Dense stirrups; 9. Transverse stiffening ribs; 10. Vent hole; 11. Fine aggregate concrete; 12. Longitudinal reinforcement; 13. Stirrups. Detailed Implementation

[0023] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0024] like Figures 1-2 As shown in the figure, the steel structure column base node structure of the basement roof provided by this utility model includes: upper steel structure column 1, outer reinforced concrete column base 3, reinforced concrete column transition section 4 and lower reinforced concrete column 2.

[0025] The reinforced concrete column base 3, the reinforced concrete column transition section 4, and the lower reinforced concrete column 2 are provided with multiple stirrups 13 at horizontal intervals and multiple longitudinal bars 12 at vertical intervals. The reinforced concrete column transition section 4 and the lower reinforced concrete column 2 are sequentially arranged below the reinforced concrete column base 3. The reinforced concrete column base 3 is located at the top of the basement (within a certain height range of the top of the reinforced concrete basement), and the top of the reinforced concrete column base 3 is at the same elevation as the top of the basement. The height range and cross-sectional dimensions of the reinforced concrete column base 3 meet the requirements of current design codes and construction manuals, and the longitudinal bars 12 and stirrups 13 of the reinforced concrete column base 3 meet the requirements of the steel structure column base and basement frame envelope calculation.

[0026] The upper steel structure column 1 is filled with fine aggregate concrete 11 (within a certain height range corresponding to and above the basement). The upper steel structure column 1 extends into the outer reinforced concrete column base 3 and extends to the bottom of the outer reinforced concrete column base 3; the central axis of the upper steel structure column 1 and the outer reinforced concrete column base 3 are centrally aligned. Multiple shear studs 7 are circumferentially installed on the upper steel structure column 1 within the range of the outer reinforced concrete column base 3 to ensure the normal transmission of shear force between the upper steel structure column 1 and the lower reinforced concrete column 2.

[0027] The bottom of the upper steel structure column 1 is provided with a column foot bottom plate 5; the column foot bottom plate 5 is connected with the reinforced concrete column transition section 4. Specifically, the column foot bottom plate 5 is connected with the reinforced concrete column transition section 4 by using anchor bolts 6, and the anchor bolts 6 fix the column foot bottom plate 5 and the reinforced concrete column transition section 4.

[0028] The upper steel structure column 1 is provided with a transverse stiffening rib 9 at the top position of the outer-wrapped reinforced concrete column foot 3 (the top elevation of the basement), and exhaust holes 10 are arranged on the transverse stiffening rib 9 to ensure the compressive strength of the upper steel structure column 1.

[0029] The reinforced concrete column transition section 4 is arranged between the outer-wrapped reinforced concrete column foot 3 and the lower reinforced concrete column 2, and is a transition section with variable cross-section of a certain height; the reinforced concrete column transition section 4 gradually decreases in width from top to bottom, so that the cross-section of the lower reinforced concrete column 2 gradually changes from a large cross-section at the top to a small cross-section at the lower part. A plurality of densified stirrups 8 are arranged at the lower end of the reinforced concrete column transition section 4, specifically four densified stirrups 8, so as to ensure the smooth and continuous transition of the stiffness and bearing capacity of the lower reinforced concrete column 2. The densified stirrups 8 can be diamond-shaped densified stirrups.

[0030] The steel structure column foot node of the utility model first meets the construction and calculation requirements of the current design specification for the outer-wrapped column foot of the steel structure column, and the bearing capacity of the steel structure column foot meets the design requirements through envelope design; secondly, the column foot node of the utility model only sets the outer-wrapped reinforced concrete column foot 3 with a large cross-section at the top of the basement, and gradually changes into the lower reinforced concrete column 2 with a small cross-section through the reinforced concrete column transition section 4, so that the building function of the basement is not affected, and various requirements of the building space can be fully met; then, the node of the utility model adopts the node structure of the locally enlarged outer-wrapped reinforced concrete column foot 3 and the reinforced concrete column transition section 4 with variable cross-section, so that the extension length of the upper steel structure column 1 into the lower reinforced concrete column 2 is reduced, and the cross-section of the lower reinforced concrete column 2 is reduced, thereby avoiding the waste of building materials and better saving the engineering cost, and having good economic benefits. The steel structure column foot node of the utility model does not affect the cross-section of the reinforced concrete basement column.

[0031] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the utility model, rather than limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments are modified, or some or all of the technical features are replaced equivalently, without making the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A steel column base node structure for the roof of a basement, characterized in that, include: Upper steel structure column (1), outer reinforced concrete column base (3), reinforced concrete column transition section (4) and lower reinforced concrete column (2); Below the outer reinforced concrete column base (3), a reinforced concrete column transition section (4) and a lower reinforced concrete column (2) are arranged in sequence; The upper steel structure column (1) extends into the outer reinforced concrete column base (3) and extends to the bottom of the outer reinforced concrete column base (3); the central axis of the upper steel structure column (1) and the outer reinforced concrete column base (3) are aligned in the center; The bottom of the upper steel structure column (1) is provided with a column base plate (5); the column base plate (5) is connected to the reinforced concrete column transition section (4).

2. The steel column base node structure for the basement roof according to claim 1, characterized in that, The width of the reinforced concrete column transition section (4) gradually decreases from top to bottom.

3. The steel column base node structure for the basement roof according to claim 1, characterized in that, Multiple reinforced concrete column transition sections (4) are provided with multiple layers of dense stirrups (8) at the lower end.

4. The steel column base node structure for the basement roof according to claim 1, characterized in that, The column base plate (5) is connected to the reinforced concrete column transition section (4) by anchor bolts (6).

5. The steel column base node structure for the basement roof according to claim 1, characterized in that, The upper steel structure column (1) is filled with fine stone concrete (11).

6. The steel column basement joint structure for the basement roof according to claim 5, characterized in that, The upper steel structure column (1) has multiple shear studs (7) circumferentially arranged within the area of ​​the outer reinforced concrete column base (3).

7. The steel column basement joint structure for the basement roof according to claim 6, characterized in that, The reinforced concrete column base (3) is located at the top of the basement, and the top of the reinforced concrete column base (3) is at the same elevation as the top of the basement.

8. The steel column base node structure for the basement roof according to claim 7, characterized in that, The upper steel structure column (1) is provided with a transverse stiffening rib (9) at the top of the outer reinforced concrete column base (3), and an exhaust hole (10) is provided on the transverse stiffening rib (9).

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