CN102966113A - Shallow buried steel column base and construction method thereof - Google Patents
Shallow buried steel column base and construction method thereof Download PDFInfo
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- CN102966113A CN102966113A CN2012104400004A CN201210440000A CN102966113A CN 102966113 A CN102966113 A CN 102966113A CN 2012104400004 A CN2012104400004 A CN 2012104400004A CN 201210440000 A CN201210440000 A CN 201210440000A CN 102966113 A CN102966113 A CN 102966113A
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Abstract
The invention provides a shallow buried steel column base which comprises a steel column, wherein the bottom of the steel column is provided with an end plate; the end plate of the steel column is fixed by virtue of an anchor bolt; the other end of the anchor bolt is fixed in a bottom plate or base beam concrete; and the bottom of the steel column is buried in shallow buried layer concrete above the bottom plate or the base beam concrete. The shallow buried steel column base is of a shear-resistant structure due to the shallow buried layer reinforced concrete, so that the requirement for arrangement of a lower shear-resistant key on the end plate of the steel column is eliminated; and the anchor bolt is not needed to be shear-resistant, so that the difficulty in anchor bolt quantity and arrangement brought by the condition that the anchor bolt participates in shear resistance can be relieved or eliminated, and the shear stiffness and shear bearing capability of the steel column base are effectively improved. The shear-resistant design of the steel column base is simplified, the construction is convenient, and the seismic performance of the steel column base is improved. The invention further provides a construction method of the shallow buried steel column base.
Description
Technical field
The invention belongs to the steel work technical field, particularly a kind of shallow embedding formula steel column pin and job practices.
Background technology
Steel work has the intensity height, from heavy and light, the series of advantages such as anti-seismic performance is good, speed of application is fast, ground cost saving, area occupied is little, industrialization degree is high, good looking appearance, comparing it with concrete structure is environment-friendly type and can again utilizing, be easy to industrialization, developed country extensively adopts steel work in building construction.Construction steel structure is broadly divided into ordinary steel structure and light section steel structure.
In the construction steel structure, the effect of steel column pin is that axle power, the bending and shearing with the steel column lower end passes to the basis, and superstructure and basis are linked together effectively, guarantees structural safety.Steel column foot is the important pivot that steel superstructure is connected with sole plate, and the rigidity and the internal force that affect whole superstructure distribute.Steel column foot generally includes three kinds of exposed suspension column, outer-enwraped type suspension column and flush type suspension columns.Exposed suspension column refers to that base plate at the bottom of the post or boots beam are fixed on suspension column form on the basis by crab-bolt; The outer-enwraped type suspension column is comprised of steel column pin and external wrapping concrete, is positioned at more than the basic end face; The flush type suspension column refers to the suspension column with the direct buried foundation of steel column or grade beam.Exposed suspension column rigidly connects and hinged two kinds, is usually used in single-layer steel structure, portal frame; Outer-enwraped type suspension column and flush type suspension column are considered by rigidly connecting suspension column, are usually used in multilayer, high-rise steel structure building.
In on January 17th, 1994 USA Northridge Earthquake and Japanese Kobe earthquake on January 17 nineteen ninety-five, the destruction of steel column pin is comparatively serious, has caused the extensive concern of engineering circles and academia.Destroy the status investigation report according to nineteen ninety-five Kobe violent earthquake steel work, in 998 steel work that are seriously damaged, 218 is because the destruction of steel column pin directly causes.Exposed suspension column generally destroys seriously, the situation that is elongated and extracts though the sill anchor that the crab-bolt that has fracture, the end plate that has are broken, had at the crab-bolt edge does not have fracture is also more, the end plate of hinged column base and post member are arranged because adopting fillet weld, the example of part welding seam breaking is more, the crushed situation of base concrete is many, and the situation of the suspension column end plate distortion of obviously observing is actually rare.To the outer-enwraped type suspension column, when the sectional dimension of steel column not or in the inadequate situation of external wrapping concrete height or concrete thickness, the external wrapping concrete cracking peels off, part steel column end plate welding position destroys, the situation that stone bolt is elongated or extracts exists, and shows in its former design specifications inadequate to the unreasonable and safety of outer-enwraped type steel column pin method for designing.Substantially do not observe the remarkable destruction of flush type suspension column.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of shallow embedding formula steel column pin and job practices, keeping on the exposed steel column pin easy construction advantage basis, proposition is by arranging stiffener and building certain thickness steel concrete shallow embedding layer at the top, improve rigidity and the bearing capacity of steel column pin, thereby improve its shock resistance.
To achieve these goals, the technical solution used in the present invention is:
A kind of shallow embedding formula steel column pin comprises the bottom with the steel column 1 of end plate, and the end plate of steel column 1 is crab-bolt 3 fixedly, and the another end of crab-bolt 3 is fixed in base plate or the grade beam concrete eight, and the bottom of steel column 1 is embedded in the shallow embedding layer concrete 9 of base plate or grade beam concrete eight top.
Described steel column 1 is opening section or closed cross-section form.
Described opening section is H shape or ten intersection fonts, and described closed cross-section is circular, square or rectangular.
Concrete perfusion in the described closed cross-section steel column bottom section, concrete height are not less than 1.5 times of the outer shallow embedding layer thickness of pipe, and strength grade is C30～C40.
The thickness of described shallow embedding layer concrete 9 is got the two smaller value of steel column depth of section or diameter and 300mm, and minimum thickness is 200mm.
In the end plate scope of described steel column 1 stiffener 2 is set, stiffener 2 is anchored in base plate or the grade beam concrete eight, perhaps be anchored in the shallow embedding layer concrete 9, improve the shear resistance of shallow embedding layer concrete and to the effect of contraction of steel column 1, stiffener 2 adopts HRB335, HRB400 or HRB500 grade reinforcing steels.
The end plate of described steel column 1 is with the distributing bar 7 of vertical reinforcement and horizontal hoop composition outward, wherein the vertical spacing of stirrup is 100mm, vertical reinforcement adopts HRB335, HRB400 or HRB500 grade reinforcing steel, and horizontal hoop adopts HPB300, HRB335 or HRB400 grade reinforcing steel.
Horizontal distribution reinforcing bar 6 is arranged at described shallow embedding layer concrete 9 tops, by being anchored at the connecting reinforcement 5 in base plate or the grade beam concrete eight, reinforcement is to the drawknot of described horizontal distribution reinforcing bar 6, improve the shear resistance of shallow embedding layer concrete 9, guarantee the suspension column shear stiffness of steel column 1 and cut bearing capacity, horizontal distribution reinforcing bar 6 adopts HRB335, HRB400 or HRB500 grade reinforcing steel, and connecting reinforcement 5 adopts HPB300, HRB335 or HRB400 grade reinforcing steel.
Described steel column 1 adopts Q235, Q345, Q390 or Q420 level steel pipe; Described shallow embedding layer concrete 9 adopts the concrete that is not less than the C30 strength grade.
The present invention also provides a kind of job practices of shallow embedding formula steel column pin, comprises the steps:
The horizontal distribution reinforcing bar 6 of stiffener 2, distributing bar 7 and shallow embedding layer around the step 6, colligation steel column 1, guarantee with connecting reinforcement 5 between be connected formwork supporting plate;
The present invention builds the shallow embedding layer steel concrete of certain thickness and planar dimension and stiffener is set more than the steel column end plate, by the shearing resistance of shallow embedding layer steel concrete, eliminate the requirement that arranges of shear key under the steel column end plate, also without the crab-bolt shearing resistance, alleviate or eliminate because crab-bolt participates in the difficulty that crab-bolt quantity that shearing resistance brings and cloth are set up, thus the shear stiffness that effectively improves the steel column pin with cut bearing capacity, simplify shear Design bottom the steel column, convenient construction improves the suspension column anti-seismic performance.
Compared with prior art, the invention has the beneficial effects as follows:
(1) compares with exposed suspension column, on the basis that absorbs exposed suspension column easy construction advantage, owing to there is the shallow embedding concrete of arrangement of reinforcement to participate in shearing resistance around the steel column, shear stiffness and the shear-carrying capacity of this suspension column obviously improve, reduced the demand to the crab-bolt shearing resistance, cast-in fixing bolt is mainly used in transmitting moment of flexure and axial tension, reduced the quantity of crab-bolt, simultaneously, reduce or eliminate the requirement of shear key under the steel column end plate, make things convenient for processing and fabricating and construction, can realize rigidly connecting or the designing requirement of semi-rigid joint suspension column;
(2) compare with the flush type suspension column, the secondary that its end plate base plate or grade beam need not after reserved opening and steel column are installed is built base plate or the concrete requirement of grade beam, convenient construction, and suspension column build-in effect reaches and rigidly connects fully or the requirement of semi-rigid joint;
(3) compare with the outer-enwraped type suspension column, do not want the external wrapping concrete section, easy construction has reduced material usage, and elevation of building is processed more flexible.
(4) this suspension column is adapted to the requirement of multilayer and high-rise steel structure building, individual layer and Multiple-story Lightweight Steel, is particularly suitable for design of column foot and the construction of requirements for fortification against earthquake building.
Description of drawings
Fig. 1 is shallow embedding formula steel column pin schematic diagram of the present invention.
Fig. 2 is shallow embedding formula steel column base structure arrangement of reinforcement structure-floor map of the present invention.
Fig. 3 is A-A section enlarged diagram among Fig. 2.
Fig. 4 is B-B section enlarged diagram among Fig. 2.
The specific embodiment
Describe embodiments of the present invention in detail below in conjunction with drawings and Examples.
As shown in Figure 1, a kind of shallow embedding formula steel column pin, comprise that the bottom is with the steel column 1 of end plate, the end plate of steel column 1 is crab-bolt 3 fixedly, the another end of crab-bolt 3 is fixed in base plate or the grade beam concrete eight, the bottom of steel column 1 is embedded in the shallow embedding layer concrete 9 of base plate or grade beam concrete eight top, and wherein, steel column 1 can be opening section (such as H shape or ten intersection fonts etc.) or closed cross-section form (such as circle, square or rectangular etc.).When selecting the closed cross-section form, concrete perfusion in the steel column bottom section, concrete height are not less than 1.5 times of the outer shallow embedding layer thickness of pipe, and strength grade is C30～C40.The thickness of shallow embedding layer concrete 9 is got the two smaller value of steel column depth of section or diameter and 300mm, and minimum thickness is 200mm, adopts the concrete that is not less than the C30 strength grade.Steel column 1 adopts Q235, Q345, Q390 or Q420 level steel pipe.
The concrete structure of this shallow embedding formula steel column pin is shown in Fig. 2-4, in the end plate scope of steel column 1 stiffener 2 is set, stiffener 2 is anchored in base plate or the grade beam concrete eight, perhaps be anchored in the shallow embedding layer concrete 9, improve the shear resistance of shallow embedding layer concrete and to the effect of contraction of steel column 1, stiffener 2 adopts HRB335, HRB400 or HRB500 grade reinforcing steels.The end plate of steel column 1 is with the distributing bar 7 of vertical reinforcement and horizontal hoop composition outward, and wherein the vertical spacing of stirrup is 100mm, and vertical reinforcement adopts HRB335, HRB400 or HRB500 grade reinforcing steel, and horizontal hoop adopts HPB300, HRB335 or HRB400 grade reinforcing steel.Horizontal distribution reinforcing bar 6 is arranged at shallow embedding layer concrete 9 tops, by being anchored at the connecting reinforcement 5 in base plate or the grade beam concrete eight, reinforcement is to the drawknot of described horizontal distribution reinforcing bar 6, improve the shear resistance of shallow embedding layer concrete 9, guarantee the suspension column shear stiffness of steel column 1 and cut bearing capacity, horizontal distribution reinforcing bar 6 adopts HRB335, HRB400 or HRB500 grade reinforcing steel, and connecting reinforcement 5 adopts HPB300, HRB335 or HRB400 grade reinforcing steel.
The present invention also provides a kind of job practices of shallow embedding formula steel column pin, comprises the steps:
The horizontal distribution reinforcing bar 6 of stiffener 2, distributing bar 7 and shallow embedding layer around the step 6, colligation steel column 1, guarantee with connecting reinforcement 5 between be connected formwork supporting plate;
Steel column, various reinforcing bar and concrete specific design parameter should be by calculative determinations, and all designs all should meet the regulation of the design specificationss such as " seismic design provision in building code ", " Code for design of concrete structures ", " technical specification for concrete structures of high-rise building ".Carry out the correlation computations such as normal section press-bending bearing capacity, tension and compression bearing capacity, styletable cross section shear-carrying capacity, and satisfy the requirement of the structure such as minimal construction arrangement of reinforcement.Wherein, when calculating the end section shear-carrying capacity, count the shear contribution of shallow embedding steel concrete and stiffener.
Claims (10)
1. shallow embedding formula steel column pin, comprise that the bottom is with the steel column (1) of end plate, the end plate of steel column (1) is crab-bolt (3) fixedly, the another end of crab-bolt (3) is fixed in base plate or the grade beam concrete (8), it is characterized in that the bottom of steel column (1) is embedded in the shallow embedding layer concrete (9) of base plate or grade beam concrete (8) top.
2. shallow embedding formula steel column pin according to claim 1 is characterized in that, described steel column (1) is opening section or closed cross-section form.
3. shallow embedding formula steel column pin according to claim 2 is characterized in that, described opening section is H shape or ten intersection fonts, and described closed cross-section is circular, square or rectangular.
4. shallow embedding formula steel column pin according to claim 2 is characterized in that, concrete perfusion in the described closed cross-section steel column bottom section, concrete height are not less than 1.5 times of the outer shallow embedding layer thickness of pipe, and strength grade is C30～C40.
5. shallow embedding formula steel column pin according to claim 1 is characterized in that, the thickness of described shallow embedding layer concrete (9) is got the two smaller value of steel column depth of section or diameter and 300mm, and minimum thickness is 200mm.
6. shallow embedding formula steel column pin according to claim 1, it is characterized in that, stiffener (2) is set in the end plate scope of described steel column (1), stiffener (2) is anchored in base plate or the grade beam concrete (8), perhaps be anchored in the shallow embedding layer concrete (9), improve the shear resistance of shallow embedding layer concrete and to the effect of contraction of steel column (1), stiffener (2) adopts HRB335, HRB400 or HRB500 grade reinforcing steel.
7. shallow embedding formula steel column pin according to claim 1, it is characterized in that, the end plate of described steel column (1) is with the distributing bar (7) of vertical reinforcement and horizontal hoop composition outward, wherein the vertical spacing of stirrup is 100mm, vertical reinforcement adopts HRB335, HRB400 or HRB500 grade reinforcing steel, and horizontal hoop adopts HPB300, HRB335 or HRB400 grade reinforcing steel.
8. shallow embedding formula steel column pin according to claim 1, it is characterized in that, horizontal distribution reinforcing bar (6) is arranged at described shallow embedding layer concrete (9) top, by being anchored at the connecting reinforcement (5) in base plate or the grade beam concrete (8), reinforcement is to the drawknot of described horizontal distribution reinforcing bar (6), improve the shear resistance of shallow embedding layer concrete (9), guarantee the suspension column shear stiffness of steel column (1) and cut bearing capacity, horizontal distribution reinforcing bar (6) adopts HRB335, HRB400 or HRB500 grade reinforcing steel, connecting reinforcement (5) adopts HPB300, HRB335 or HRB400 grade reinforcing steel.
9. shallow embedding formula steel column pin according to claim 1 is characterized in that, described steel column (1) adopts Q235, Q345, Q390 or Q420 level steel pipe; Described shallow embedding layer concrete (9) adopts the concrete that is not less than the C30 strength grade.
10. the job practices of a shallow embedding formula steel column pin is characterized in that, comprises the steps:
Step 1 is made steel column (1), processes various reinforcing bars and correlate template;
Step 2, according to designing requirement colligation concrete floor or grade beam arrangement of reinforcement (4), and distributing bar (7), connecting reinforcement (5), then formwork around the cast-in fixing bolt (3), stiffener (2), steel column;
Step 3 is built base plate or grade beam concrete (8), if under steel column (1) end plate shear key is arranged then reserve corresponding space in base plate or grade beam concrete (8);
Step 4, wait base plate or grade beam concrete (8) intensity to reach designing requirement after, prepare with clear hole the location of carrying out before steel column (1) is installed;
Step 5, lifting steel column (1) is adjusted and by cast-in fixing bolt (3) steel column (1) is fixed after the position reaches designing requirement, and with grouting material the gap between steel column (1) end plate and base plate or grade beam filled with closely knit;
The horizontal distribution reinforcing bar (6) of step 6, colligation steel column (1) stiffener (2), distributing bar (7) and shallow embedding layer on every side, guarantee with connecting reinforcement (5) between be connected formwork supporting plate;
Step 7 is built shallow embedding layer concrete (9), and maintenance stripping to the concrete formation reaches designing requirement, has finished the work progress of shallow embedding formula steel column pin.
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| CN2012104400004A CN102966113A (en) | 2012-11-06 | 2012-11-06 | Shallow buried steel column base and construction method thereof |
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| CN2012104400004A CN102966113A (en) | 2012-11-06 | 2012-11-06 | Shallow buried steel column base and construction method thereof |
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Cited By (7)
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| CN105020110A (en) * | 2015-07-24 | 2015-11-04 | 浙江中控太阳能技术有限公司 | Heliostat upright column and installation foundation |
| CN107143173A (en) * | 2017-05-05 | 2017-09-08 | 上海市城市建设设计研究总院（集团）有限公司 | Ecological parking stall |
| CN109024250A (en) * | 2018-09-30 | 2018-12-18 | 浙江大学城市学院 | A kind of exposed foot joint and its construction method of composite bridge pier stud |
| CN109137955A (en) * | 2018-09-29 | 2019-01-04 | 上海建工建集团有限公司 | A kind of shear reinforcement and its construction method of sole plate |
| CN109372009A (en) * | 2018-12-13 | 2019-02-22 | 河南省第二建设集团有限公司 | A kind of nigh-level synthesis embedded column base and its application method |
| CN112609735A (en) * | 2020-12-17 | 2021-04-06 | 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 |
| CN115198786A (en) * | 2022-07-05 | 2022-10-18 | 广州建筑工程监理有限公司 | H-shaped reinforced concrete tower crane beam foundation borne by main body structure and reinforcing method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020110A (en) * | 2015-07-24 | 2015-11-04 | 浙江中控太阳能技术有限公司 | Heliostat upright column and installation foundation |
| CN107143173A (en) * | 2017-05-05 | 2017-09-08 | 上海市城市建设设计研究总院（集团）有限公司 | Ecological parking stall |
| CN109137955A (en) * | 2018-09-29 | 2019-01-04 | 上海建工建集团有限公司 | A kind of shear reinforcement and its construction method of sole plate |
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| CN109024250A (en) * | 2018-09-30 | 2018-12-18 | 浙江大学城市学院 | A kind of exposed foot joint and its construction method of composite bridge pier stud |
| CN109372009A (en) * | 2018-12-13 | 2019-02-22 | 河南省第二建设集团有限公司 | A kind of nigh-level synthesis embedded column base and its application method |
| CN112609735A (en) * | 2020-12-17 | 2021-04-06 | 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 |
| 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 |
| CN115198786A (en) * | 2022-07-05 | 2022-10-18 | 广州建筑工程监理有限公司 | H-shaped reinforced concrete tower crane beam foundation borne by main body structure and reinforcing method |
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