CN204780977U - Reduce steel column burried depth's type of putting more energy into and bury formula column base - Google Patents

Abstract

The utility model relates to a stiffened embedded column base for reducing the embedding depth of a steel column. The steel column is an H-shaped steel column or a box-shaped steel column. The column base is embedded in a reinforced concrete foundation, including a The base plate on the bottom end face of the steel column, the area of the base plate is larger than the cross-sectional area of the steel column, vertical stiffeners are arranged between the flanges on both sides of the steel column, and the vertical stiffeners are parallel to the web of the steel column body, A plurality of studs are evenly distributed on the bottom of the outer walls of the two flanges of the steel column body, and anchor bolts are arranged at both ends of the bottom plate. The device expands the effective pressure-bearing width of the embedded part of the steel column by setting horizontal stiffeners and vertical stiffeners, which is beneficial to the transmission of bending moment and shear force on the embedded column foot joints, and can significantly reduce the pressure of the steel column. The embedding depth of the foundation or cap is further reduced, and the column foot has better economic benefits in engineering practice.

Description

A Stiffened Embedded Column Foot to Reduce the Embedded Depth of Steel Columns

technical field

The utility model relates to a stiffened embedded column base which reduces the embedding depth of a steel column.

Background technique

The embedded column foot is a rigid column foot that embeds the bottom of the steel column directly in the concrete foundation, foundation beam or basement wall, and is reinforced with reinforced concrete around it. The embedded column foot has high overall rigidity and good integrity with the foundation, so that the bottom of the steel column can easily meet the requirements of forming a plastic hinge, and the embedding and rigidity of the column foot can be easily guaranteed, and the seismic performance is good. For the embedded column foot, the most important factor affecting the bending stiffness, bearing capacity and deformation capacity of the column foot is the embedding depth of the steel column. According to the current domestic codes, the embedding depth of column feet is designed. Except for the building structure with basement, the existing building structures using embedded column feet are all faced with the excessive embedding depth of steel column feet, which will lead to foundation, foundation beams, Uneconomical issues such as too large and too deep abutments.

Contents of the invention

The utility model makes improvements to the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the utility model is to provide a stiffened embedded column foot that reduces the embedded depth of the steel column, and expands the embedded part of the steel column The effective pressure-bearing width is beneficial to the transmission of bending moment and shear force of the embedded column foot joints, and can significantly reduce the embedding depth of the steel column, thereby further reducing the embedding depth of the foundation or cap. Nodes have good economic benefits in engineering practice.

In order to solve the above-mentioned technical problems, a technical solution of the present invention is: a stiffened embedded column foot that reduces the embedding depth of the steel column, the steel column is an H-shaped steel column or a box-shaped steel column, and the The base of the column is embedded in the reinforced concrete foundation, including a bottom plate arranged on the bottom end of the steel column. The area of the bottom plate is larger than the cross-sectional area of the steel column. The straight stiffener is parallel to the web of the steel column body, the flange, the web, the vertical stiffener and the bottom plate together form a cavity, the top opening of the cavity is provided with a horizontal stiffener, and the steel column body A number of pegs are evenly distributed on the bottom of the outer walls of the two flanges, and anchor bolts are arranged at both ends of the bottom plate.

Further, the horizontal stiffener closes the top of the cavity, and the middle part of the horizontal stiffener is provided with a grouting hole for grouting into the cavity, and the radius of the grouting hole should meet the grouting requirements.

Further, the vertical stiffener is welded to the horizontal stiffener, the two flanges and the bottom plate; the distance between the vertical stiffener and the web is the minimum value between 4 times the thickness of the flange and 75mm; the vertical The distance between the stiffener and the side wall of the flange is greater than or equal to 2 times the thickness of the flange.

Further, the bottom plate is provided with through holes for installing anchor bolts, and the through holes are located on the outside of the steel column and on the center line of the web.

Further, the anchoring length of the anchor bolt at the lower part of the bottom plate is not less than 35 times the diameter of the anchor bolt, and the upper part of the anchor bolt penetrates through the bottom plate and is fastened with a nut.

Further, when the steel column is a box-shaped steel column, a grouting hole is provided on its side wall, and the grouting hole is used for grouting to the grouting hole of the horizontal stiffener.

Compared with the prior art, the utility model has the following beneficial effects: by setting horizontal stiffeners and vertical stiffeners, the utility model has the following beneficial effects: the effective pressure-bearing width of the embedded part of the steel column is enlarged, which is beneficial to the embedding The transmission of bending moment and shear force on the embedded column foot joints can achieve the purpose of reducing the embedding depth of steel columns. The calculation results show that the local structure can reduce the embedding depth of the steel column by about 30%, which has good economic benefits; the setting of studs and anchor bolts improves the synergy between the steel column, post-cast concrete and reinforced concrete foundation The work is beneficial to the integrity of the column foot joints and realizes the coordinated force bearing.

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the utility model.

Fig. 2 is a sectional view of A-A in Fig. 1 .

Fig. 3 is a B-B sectional view in Fig. 1 .

Fig. 4 is a sectional view of C-C in Fig. 1 .

Fig. 5 is a schematic structural diagram of Embodiment 2 of the present utility model.

Fig. 6 is a D-D sectional view in Fig. 2 .

Fig. 7 is a sectional view of E-E in Fig. 2 .

Fig. 8 is a sectional view of F-F in Fig. 2 .

In the figure: 1-H-shaped steel column, 2-box-shaped steel column, 3-bottom plate, 31-through hole, 4-vertical stiffener, 5-horizontal stiffener, 51-grouting hole, 6-bolt, 7 -Anchor bolts, 8-Reinforced concrete foundation, 9-Reinforced concrete secondary pouring line, 10-Post-cast concrete.

Detailed ways

Embodiment 1: As shown in Figures 1 to 4, a stiffened embedded column base that reduces the embedding depth of a steel column, the steel column is an H-shaped steel column 1, and the column base is embedded in a reinforced concrete foundation , including a bottom plate 3 arranged on the bottom end face of the steel column, the area of the bottom plate 3 is larger than the cross-sectional area of the steel column, vertical stiffeners 4 are arranged between the flanges on both sides of the steel column, and the vertical stiffeners 4 and The webs of the steel column body are parallel, and the flange, the web, the vertical stiffener 4 and the bottom plate 3 jointly form a cavity, and the top opening of the cavity is provided with a horizontal stiffener 5, and the two wings of the steel column body Several pegs 6 are evenly distributed on the bottom of the outer wall of the edge, and anchor bolts 7 are arranged at both ends of the bottom plate 3 .

In this embodiment, the horizontal stiffener 5 closes the top of the cavity, and the middle part of the horizontal stiffener 5 is provided with a grouting hole 51 for grouting into the cavity, and the radius of the grouting hole 51 should meet the grouting requirements.

In this embodiment, the vertical stiffener 4 is welded to the horizontal stiffener 5, the two flanges and the bottom plate 3; the distance between the vertical stiffener and the web is the minimum value between 4 times the thickness of the flange and 75mm ; The distance between the vertical stiffener 4 and the side wall of the flange is greater than or equal to 2 times the thickness of the flange.

In this embodiment, the bottom plate 3 is provided with through holes 31 for installing anchor bolts, and the through holes 31 are located on the outside of the steel column and on the center line of the web.

In this embodiment, the anchoring length of the anchor bolt 7 at the lower part of the bottom plate is not less than 35 times the diameter of the anchor bolt, and the upper part of the anchor bolt 7 penetrates through the bottom plate and is fastened with a nut.

The construction technology of the present embodiment is carried out according to the following steps:

(1) Select the required H-shaped steel column, and according to the relevant parameters of the steel column to be embedded, make vertical stiffeners, horizontal stiffeners and bottom plates that meet the requirements, and set grouting requirements on the horizontal stiffeners. Grouting holes, open through holes at both ends of the bottom plate;

(2) Factory construction: Weld the bottom plate on the bottom end of the steel column, determine the welding position of the vertical stiffeners at the flanges on both sides of the steel column, and then weld the vertical stiffeners to the flanges and the bottom plate respectively. The webs of the steel columns are parallel, and the horizontal stiffeners are welded at the top opening of the cavity formed by the flange, the web, the vertical stiffeners and the bottom plate, and several studs are respectively welded at the bottom of the outer walls of the two flanges;

(3) On-site construction: The anchor bolts are pre-embedded in the reinforced concrete foundation 8 according to the design position, and after the reinforced concrete foundation 8 reaches the installation strength of the steel column, the steel column prefabricated in step (2) is hoisted; , the through-holes of the bottom plate go through the anchor bolts respectively. After adjusting the horizontal position and verticality of the steel column, the top of the anchor bolts is fastened with nuts; finally, post-cast concrete 10 above the secondary pouring line 9 of the reinforced concrete, and at the same time Pour the post-cast concrete into the cavity of the steel column through the grouting hole until the grouting hole emerges. The post-cast concrete should be of the same strength grade as the reinforced concrete foundation.

The distance between the horizontal stiffener and the top surface of the reinforced concrete foundation 8 is the thickness of the protective layer.

Embodiment 2: As shown in Figure 5-8, a stiffened embedded column foot that reduces the embedding depth of the steel column, the steel column is a box-shaped steel column 2 (in the field of construction, it is generally called bending moment action The steel plate parallel to the surface is the web, and the steel plate perpendicular to the bending moment acting surface is the flange), the column foot is embedded in the reinforced concrete foundation, including the bottom plate 3 arranged on the bottom end of the steel column, the bottom plate 3 The area is larger than the cross-sectional area of the steel column. Vertical stiffeners 4 are arranged in the middle of the flanges on both sides of the steel column. The vertical stiffeners 4 are parallel to the web of the steel column body. The flange, web, and vertical The stiffeners 4 and the bottom plate 3 jointly form a cavity, the opening of the top of the cavity is provided with a horizontal stiffener 5, and several studs 6 are evenly distributed on the bottom of the outer wall of the two flanges of the steel column body. 3 Both ends are provided with anchor bolts 7

In this embodiment, the horizontal stiffener 5 closes the top of the cavity, and the middle part of the horizontal stiffener 5 is provided with a grouting hole 51 for grouting into the cavity, and the radius of the grouting hole 51 should meet the grouting requirements.

In this embodiment, the vertical stiffener 4 is welded to the horizontal stiffener 5, the two flanges and the bottom plate 3; the distance between the vertical stiffener and the web is the minimum value between 4 times the thickness of the flange and 75mm ; The distance between the vertical stiffener 4 and the side wall of the flange is greater than or equal to 2 times the thickness of the flange.

In this embodiment, the bottom plate 3 is provided with through holes 31 for installing anchor bolts, and the through holes 31 are located on the outside of the steel column and on the center line of the web.

In this embodiment, the anchoring length of the anchor bolt 7 at the lower part of the bottom plate is not less than 35 times the diameter of the anchor bolt, and the upper part of the anchor bolt 7 penetrates through the bottom plate and is fastened with a nut. When the steel column is a box-shaped steel column, a grouting hole is arranged on its side wall, and the grouting hole is used for grouting to the grouting hole of the horizontal stiffener.

The above descriptions are only preferred embodiments of the present utility model, and all equivalent changes and modifications made according to the patent scope of the present utility model shall fall within the scope of the present utility model.

Claims (6)

1. one kind is reduced type of the putting more energy into embedded column base of steel column buried depth, described steel column is H-shaped steel column or box steel column, it is characterized in that: described suspension column is imbedded in reinforced concrete foundation, comprise the base plate being arranged on steel column bottom end face, the area of described base plate is greater than steel column cross-sectional area, vertical stiffening rib is provided with between described steel column two side wing edge, described vertical stiffening rib is parallel with the web of steel column body, the described edge of a wing, web, vertical stiffening rib and base plate form a cavity volume jointly, described cavity volume top open part is provided with sash rib, several pegs are evenly equipped with respectively on bottom the outside wall surface of described steel column body two edge of a wing, described base plate two ends are provided with crab-bolt.

2. type of the putting more energy into embedded column base of minimizing steel column buried depth according to claim 1, it is characterized in that: described sash rib is by this cavity volume top seal, be provided with the grout hole toward the grouting of this cavity volume in the middle part of described sash rib, this grout hole radius should meet grouting requirement.

3. type of the putting more energy into embedded column base of minimizing steel column buried depth according to claim 1, is characterized in that: described vertical stiffening rib welds mutually with sash rib, two edges of a wing and base plate; The spacing of described vertical stiffening rib and web is the minimum value between 4 times of edge of a wing thickness to 75mm; The spacing of described vertical stiffening rib and edge of a wing sidewall is more than or equal to 2 times of edge of a wing thickness.

4. type of the putting more energy into embedded column base of minimizing steel column buried depth according to claim 1, is characterized in that: described base plate is provided with the through hole for installing crab-bolt, on the outside that described through hole is positioned at steel column and web center line.

5. type of the putting more energy into embedded column base of minimizing steel column buried depth according to claim 1, is characterized in that: described crab-bolt is not less than 35 times of crab-bolt diameters in the anchorage length of base plate bottom, and described crab-bolt top is run through base plate and used nut fastening.

6. type of the putting more energy into embedded column base of minimizing steel column buried depth according to claim 1, is characterized in that: when described steel column is box steel column, its sidewall is provided with injected hole, and this injected hole is used for toward the grouting of sash rib grout hole.