CN109853849B - Embedded column base joint with profile steel short beam and construction method thereof - Google Patents
Embedded column base joint with profile steel short beam and construction method thereof Download PDFInfo
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- CN109853849B CN109853849B CN201910280772.8A CN201910280772A CN109853849B CN 109853849 B CN109853849 B CN 109853849B CN 201910280772 A CN201910280772 A CN 201910280772A CN 109853849 B CN109853849 B CN 109853849B
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Abstract
本发明公开了一种装有型钢短梁的埋入式柱脚节点及其施工方法，柱体四周垂直连接若干型钢短梁，每个型钢短梁垂直贯穿有若干锚栓，柱体下方安装有柱底板，柱底板外围垂直贯穿有若干锚栓。施工方法为首先完成柱体制作，然后柱底板和柱底加劲肋焊接在柱体底部，将型钢短梁通过连接板连接在柱体上，在型钢短梁上设置若干梁端锚栓和梁端加劲肋，在柱体外表面焊接抗剪连接件，将加工完的结构运至施工现场，待结构安装就位后，铺设钢筋并往结构上浇筑混凝土。解决了现有埋入式柱脚节点埋入深度大、抗冲切和抗弯性能差以及施工复杂的问题。本发明增大了混凝土底梁抗冲切面积，提高柱脚节点抗冲切承载力，同时型钢短梁和锚栓传递更多弯矩，降低施工难度。
The invention discloses an embedded column foot joint equipped with short profiled steel beams and a construction method thereof. A plurality of short profiled steel beams are vertically connected around a column body. The column bottom plate is vertically penetrated by a plurality of anchor bolts at the periphery of the column bottom plate. The construction method is to first complete the production of the column body, then weld the column bottom plate and the column bottom stiffener to the bottom of the column body, connect the section steel short beam to the column body through the connecting plate, and set several beam end anchors and beam ends on the section steel short beam The stiffeners are welded with shear connectors on the outer surface of the column, and the processed structure is transported to the construction site. After the structure is installed, steel bars are laid and concrete is poured on the structure. The problems of large buried depth, poor punching shear resistance and bending resistance and complicated construction of the existing buried column foot joints are solved. The invention increases the punching shear resistance area of the concrete bottom beam, improves the punching shear resistance bearing capacity of the column foot joints, and at the same time transmits more bending moments from the section steel short beams and the anchor bolts, thereby reducing the construction difficulty.
Description
Technical Field
The invention relates to an embedded column base node provided with a profile steel short beam and a construction method thereof, belonging to the technical field of building structures.
Background
The column base node is used as an important stressed part in a structure system, not only is the integral reliability of the structure system directly related, but also the construction quality, the engineering progress and the engineering cost of the structure are influenced. The column base nodes of the section steel columns and the steel tube concrete columns can be generally divided into exposed type, outer wrapping type and embedded type column base nodes, wherein the embedded type column base nodes have the advantages of good anti-seismic performance and building effect and the like, and have wide application prospects in high-rise and super high-rise structures.
Disclosure of Invention
The invention aims to solve the problems of large embedding depth, poor punching resistance and bending resistance and complex construction of the conventional embedded column base node, and further provides an embedded column base node provided with a profile steel short beam and a construction method thereof.
The invention provides an embedded column base node provided with profile steel short beams, which comprises a column body, a plurality of profile steel short beams, a column bottom plate and a plurality of anchor bolts; a plurality of shaped steel short beams are connected perpendicularly all around to the cylinder, every the shaped steel short beam runs through perpendicularly has a plurality of crab-bolts, the column bottom plate is installed to the cylinder below, column bottom plate periphery runs through perpendicularly has a plurality of crab-bolts.
Preferably, the number of the steel section short beams is 2-4.
Preferably, the column body is a section steel column, a section steel concrete column, a round steel tube concrete column, a rectangular steel tube concrete column or a polygonal steel tube concrete column.
Preferably, the profile steel short beam is vertically welded with a flange of the profile steel column or the profile steel concrete column.
Preferably, the embedded column base node provided with the profile steel short beam further comprises a connecting plate, the profile steel short beam is connected with the column body through the connecting plate, and the connecting plate is of an outer annular plate type, an inner partition plate type or an outer extending inner partition plate type.
Preferably, the profiled bar short beam is connected with a web plate of a profiled steel column or a profiled steel concrete column through a connecting plate.
Preferably, the connecting plate is fixedly sleeved on the peripheries of the round steel tube concrete column, the rectangular steel tube concrete column and the polygonal steel tube concrete column.
Preferably, the crab-bolt includes beam-ends crab-bolt and column bottom crab-bolt, and is a plurality of the beam-ends crab-bolt runs through shaped steel short beam perpendicularly, the periphery of column bottom plate has a plurality of column bottom crab-bolts through the trompil mode is run through perpendicularly.
Preferably, the shaped steel short beam still includes a plurality of beam-ends stiffening rib, shaped steel short beam internally mounted have a plurality of with shaped steel short beam's web vertically beam-ends stiffening rib, beam-ends stiffening rib is located the both sides of beam-ends crab-bolt.
Preferably, the embedded column base node provided with the profile steel short beam further comprises column bottom stiffening ribs, and a plurality of column bottom stiffening ribs are arranged at the joints of the column body and the column bottom plate.
Preferably, the embedded column base node provided with the profile steel short beam further comprises a shear connector, the shear connector is arranged on the periphery of the column body, and the shear connector can be shear studs, angle steels, channel steels or PBL connectors.
A construction method of an embedded column base joint provided with a profile steel short beam comprises the following steps:
the method comprises the following steps: manufacturing a column body;
step two: the column bottom plate and the column bottom stiffening rib are welded at the bottom of the column body;
welding a connecting plate on the column body;
step four, connecting the connecting section steel short beam with a connecting plate;
step five, arranging a plurality of beam end anchor bolts on the profile steel short beam;
welding a shear connector on the outer surface of the cylinder;
step seven: welding beam end stiffening ribs on the profile steel short beam;
step eight: and (3) transporting the processed structure to a construction site, laying steel bars and pouring concrete on the structure after the structure is installed in place, wherein the pouring thickness of the concrete is higher than the height of the section steel short beam on the column body.
The embedded column base node with the profile steel short beam and the construction method thereof have the beneficial effects that:
1. the embedded column base node provided with the profile steel short beam can directly transmit most of axial force of the column to the concrete foundation bottom beam or the pile foundation bearing platform by utilizing the connecting plate welded on the column base and the profile steel short beam, thereby reducing the punching force of the column base, remarkably reducing the thickness of the column base concrete and the number of reinforcing bars, and further reducing the construction difficulty and the engineering cost.
2. The embedded column base joint profile steel short beam with the profile steel short beam has larger plane size, can better resist column base bending moment, can obviously reduce the requirement on column base burial depth, further reduces the size of a foundation bottom beam and reduces the engineering difficulty.
3. The embedded column base node provided with the profile steel short beam can disperse and transmit the upward thrust in the profile steel short beam to the lower concrete when the column base is bent by arranging the anchor bolt on the profile steel short beam, thereby obviously reducing the possibility of upward punching and cutting damage of the surrounding concrete, further reducing the height and the number of reinforcing bars of a foundation bottom beam, improving the construction speed and reducing the construction cost.
4. The embedded column base node provided with the profile steel short beam is a novel embedded column base node which is reasonable in stress, simple in structure and convenient to construct.
Drawings
FIG. 1 is a schematic perspective view of an embedded type steel section or steel reinforced concrete column base node provided with a steel section short beam and an anchor bolt according to a first embodiment of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
fig. 4 is a schematic perspective view of an embedded type round steel tube concrete column base node provided with a short section steel beam and an anchor bolt according to a second embodiment of the invention;
FIG. 5 is a front view of FIG. 4;
FIG. 6 is a top view of FIG. 4;
fig. 7 is a schematic perspective view of an embedded rectangular concrete-filled steel tube column base node provided with a short section steel beam and an anchor bolt according to a third embodiment of the present invention;
FIG. 8 is a front view of FIG. 7;
FIG. 9 is a top view of FIG. 7;
in the figure: 1-a column; 2-connecting plates; 3-short section steel beams; 4-beam-end anchor bolts; 5-a reinforced concrete foundation bottom beam; 6-a shear connector; 7-column floor; 8-column bottom stiffening ribs; 9-column bottom anchor bolt; 10-beam end stiffeners.
Detailed Description
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
the first embodiment is as follows: the present embodiment is explained with reference to fig. 1 to 3. The embedded column base node provided with the profile steel short beam comprises a column body 1, a plurality of profile steel short beams 3, a column bottom plate 7 and a plurality of anchor bolts; a plurality of shaped steel short beam 3 are connected perpendicularly all around to cylinder 1, every shaped steel short beam 3 runs through perpendicularly has a plurality of crab-bolts, column bottom plate 7 is installed to 1 below of cylinder, 7 peripheral vertical penetrations of column bottom plate have a plurality of crab-bolts.
The profile steel short beam 3 is an I-beam, a box-shaped beam, a welded steel beam or an H-shaped steel beam, can directly transmit axial load of a column body, increases the anti-punching area of a concrete bottom beam, obviously improves the anti-punching bearing capacity of a column base node, and simultaneously the profile steel short beam 3 and an anchor bolt can transmit more bending moments, so that the embedded depth requirement of the column base node is obviously reduced, and the construction difficulty is reduced.
The number of the profile steel short beams 3 is 2-4, the number of the profile steel short beams 3 can be set according to actual conditions, two profile steel short beams can be set when the stress is not large, the two profile steel short beams are arranged oppositely, and the profile steel short beams 3 are distributed in a cross shape when the number is 4.
Or the column base nodes can be selected according to the types of the column base nodes, and can be middle column nodes, side column nodes or corner column nodes. The column body 1 in the present embodiment is a center column, so 4 steel short beams 3 are provided; when the column body 1 is an angle column, 2 profile steel short beams 3 are arranged; when the column body 1 is a side column, 3 steel short beams 3 are arranged.
The column body 1 is a section steel column, a section steel concrete column, a round steel tube concrete column, a rectangular steel tube concrete column or a polygonal steel tube concrete column. The column 1 in the column base node can be a section steel column, a section steel concrete column or a steel tube concrete column, and the steel tube in the steel tube concrete column can be a rectangular steel tube, a circular steel tube or a polygonal steel tube.
In this embodiment, the column body 1 is a section steel column or a section steel concrete column. The column bottom plate 7 is rectangular.
And the section steel short beam 3 is vertically welded with a flange of a section steel column or a section steel concrete column.
The embedded column base node provided with the profile steel short beam further comprises a connecting plate 2, the profile steel short beam 3 is connected with the column body 1 through the connecting plate 2, and the connecting plate 2 is of an outer annular plate type, an inner partition plate type or an outer extending inner partition plate type.
And the profiled bar short beam 3 is connected with a web plate of a profiled steel column or a profiled bar concrete column through a connecting plate 2.
In this embodiment, two opposite profiled bar short beams 3 are perpendicularly welded to the flange of the section steel column or the section steel concrete column, and the other two opposite profiled bar short beams 3 are connected to the web of the section steel column or the section steel concrete column through a connecting plate 2. The steel short beam 3 and the connecting plate 2 can be connected by welding or bolts.
The connecting plate 2 is fixedly sleeved on the peripheries of the round steel tube concrete column, the rectangular steel tube concrete column and the polygonal steel tube concrete column.
The crab-bolt includes beam-ends crab-bolt 4 and column base crab-bolt 9, and is a plurality of beam-ends crab-bolt 4 runs through shaped steel stub beam 3 perpendicularly, the periphery of column bottom plate 7 has a plurality of column base crab-bolts 9 through the trompil mode is perpendicular to run through. Beam-ends crab- bolt 4 and 9 sizes of column base crab-bolt and quantity can set up according to actual need, and the anchor mode of crab-bolt in the concrete includes: direct embedding, enlarged head, anchor bolt bending and the like. Each shaped steel short beam 3 is provided with a plurality of beam end anchor bolts 4, and 4 are arranged in the embodiment.
Shaped steel short beam 3 still includes a plurality of beam- ends stiffening rib 10, 3 internally mounted of shaped steel short beam have a plurality of with shaped steel short beam 3's web vertically beam-ends stiffening rib 10, beam-ends stiffening rib 10 is located the both sides of beam-ends crab-bolt 4. The short section steel beam 3 is provided with the number and the installation positions of the beam-end stiffening ribs 10 according to actual needs.
The embedded column base node provided with the profile steel short beam further comprises column bottom stiffening ribs 8, and a plurality of column bottom stiffening ribs 8 are arranged at the joint of the column body 1 and the column bottom plate 7. A plurality of column bottom stiffening ribs 8 are welded around the column bottom plate 7, and a plurality of column bottom anchor bolts 9 are arranged on the periphery of the column bottom plate 7 in a manner of holes and the like.
The embedded column base node provided with the profile steel short beam further comprises a shear connector 6, and the shear connector 6 is arranged on the periphery of the column body 1. The shear connector 6 adopts shear studs, angle steel, channel steel or PBL connectors. A plurality of shear connectors 6 are welded on the periphery of the column body 1 according to actual requirements, and a plurality of shear studs are welded in the embodiment.
The second embodiment is as follows: this embodiment is described with reference to fig. 4 to 6. In this embodiment, the column body 1 is a circular steel tube concrete column. The column bottom plate 7 is circular, and the diameter of the circle is larger than that of the circular steel tube concrete column.
The connecting plates 2 are fixedly sleeved on the periphery of the circular steel tube concrete column in an integrated structure, the four profile steel short beams 3 are uniformly connected to the outer surface of the circular steel tube concrete column through the connecting plates 2, and the connecting surfaces of the connecting plates 2 and the profile steel short beams 3 are on the same plane. The profile steel short beam 3 can be connected with the circular steel tube concrete column through the connecting plate 2. Other structures and connection relations are the same as those of the first embodiment.
The third concrete implementation mode: this embodiment is explained with reference to fig. 7 to 9. The column body 1 is a rectangular steel pipe concrete column. The column bottom plate 7 is rectangular, and the side length of the rectangle is larger than that of the rectangular concrete filled steel tube column.
The connecting plate 2 is fixedly sleeved on the periphery of the rectangular concrete filled steel tube column in an integrated structure, the connecting plate 2 is positioned on each side of the rectangular concrete filled steel tube column and is in a convex shape, and the profile steel short beams 3 are connected with the periphery of the connecting plate 2 in a protruding mode. Other structures and connection relations are the same as those of the first embodiment.
The construction method of the embedded column base joint with the profile steel short beam comprises the following specific operations:
the method comprises the following steps: manufacturing a column body 1;
step two: the column bottom plate 7 and the column bottom stiffening rib 8 are welded at the bottom of the column body 1;
welding the connecting plate 2 on the column body 1;
step four, connecting the connecting section steel short beam 3 with the connecting plate 2;
step five, arranging a plurality of beam end anchor bolts 4 on the profile steel short beam 3;
welding a shear connector 6 on the outer surface of the column body 1;
step seven: welding beam end stiffening ribs 10 on the profile steel short beam 3;
step eight: and transporting the processed structure to a construction site, after the structure is installed in place, laying reinforcing steel bars below the column bottom plate 7 and pouring concrete on the structure, wherein the pouring thickness of the concrete is higher than the height of the section steel short beam 3 at the column body 1.
The specific explanation is as follows: at first the preparation of accomplishing cylinder 1 in the mill, then shaped steel short beam 3 is connected with cylinder 1 through connecting plate 2, 3 suitable position departments in shaped steel short beam process a plurality of holes and are used for arranging beam-ends crab-bolt 4, beam-ends crab-bolt 4 can be fixed on shaped steel short beam 3 through nut etc., change the size of beam-ends crab-bolt 4 or buckle 4 tip of beam-ends crab-bolt simultaneously as required, can weld beam-ends stiffening rib 10 in 4 both sides of beam-ends crab-bolt of shaped steel short beam 3 as required, post side shear connector 6 can be fixed in the periphery of cylinder 1 through welding mode, confirm shear connector interval and size as required, 7 peripheries of column bottom plate can trompil and arrange a plurality of column bottom crab-bolts 9 as required. And (3) transporting the processed structure to a construction site, laying steel bars and pouring concrete after the structure is installed in place, hardening the concrete to form a reinforced concrete foundation bottom beam 5, and jointly bearing force to complete the construction of the column base joint.
The reinforced concrete foundation bottom beam 5 is common concrete, light concrete or high-performance concrete.
When the column base of the embedded column base joint provided with the profile steel short beam is bent, the profile steel short beam 3 also bears bending moment, one side beam can generate upward thrust on concrete contacted with the profile steel short beam, and in order to avoid punching damage on the top of a concrete bottom beam near the profile steel beam, the height of the concrete on the top of the profile steel short beam 3 is preferably increased or a certain amount of steel bars are arranged on the upper part of the profile steel short beam 3.
The above-mentioned embodiments further explain the objects, technical solutions and advantages of the present invention in detail. It should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the present invention, and that the reasonable combination of the features described in the above-mentioned embodiments can be made, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
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| CN110644526B (en) * | 2019-10-30 | 2025-02-25 | 北京市市政工程设计研究总院有限公司 | An outrigger beam embedded column foot structure and construction method for reducing the height of the pedestal |
| CN111877812B (en) * | 2020-07-15 | 2021-06-01 | 中铁工程设计咨询集团有限公司 | Elevated single-column station |
| CN112609735B (en) * | 2020-12-17 | 2022-07-22 | 浙江精工钢结构集团有限公司 | Semi-embedded column base positioning and mounting device and construction method thereof |
| CN112861216A (en) * | 2021-01-13 | 2021-05-28 | 中国建筑西北设计研究院有限公司 | Anti-punching concrete filled steel tube column base structure and anti-punching capability estimation method thereof |
| CN113123518A (en) * | 2021-04-29 | 2021-07-16 | 西安建筑科技大学 | Anti-punching device for section steel concrete special-shaped plate column node and construction method |
| CN114635430B (en) * | 2022-03-28 | 2023-12-26 | 广州一建建设集团有限公司 | Construction process for large-depth half-reverse excavation |
| CN115726392B (en) * | 2023-01-06 | 2024-06-25 | 中建八局第二建设有限公司 | Pile cap and section steel beam steel bar arrangement structure and construction method |
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