CN210533872U

CN210533872U - Eccentric loading device for concrete filled steel tubular column

Info

Publication number: CN210533872U
Application number: CN201921280253.3U
Authority: CN
Inventors: 胡松
Original assignee: Tongren University
Current assignee: Tongren University
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-05-15
Anticipated expiration: 2029-08-08

Abstract

The utility model discloses an eccentric loading device of steel core concrete column, including positive hinge plate, cloudy hinge plate and steel backing plate, be equipped with down trapezoidal steel sheet on the positive hinge plate, cloudy hinge plate relevant position is equipped with trapezoidal recess, is equipped with the through-hole around positive hinge plate and the cloudy hinge plate, and joinable high strength bolt makes cloudy hinge plate, positive hinge plate connect in the through-hole, and bolt sleeve aligns with the through-hole to make cloudy hinge plate, positive hinge plate pinpoint with vertical direction at the level, cloudy hinge plate bottom is equipped with protruding awl, and it is equipped with the steel backing plate recess to correspond the position on the steel backing plate, and protruding awl inserts the steel backing plate recess and can make loading device and the geometric centering of steel core concrete column. A steel core concrete column eccentric loading test device, be equipped with high strength bolt and bolt sleeve, protruding awl and steel backing plate recess in addition, before can the loading, cloudy, positive hinge plate can conveniently leveling and centering, can also make loading device and component pinpoint, the eccentricity is accurate, brings better use prospect.

Description

Eccentric loading device for concrete filled steel tubular column

Technical Field

The utility model relates to a concrete structure test method technical field specifically is a steel core concrete column eccentric loading device.

Background

The traditional reinforced concrete column eccentric compression test loading device is realized through a knife edge support or a spherical support, but the traditional loading device has the following problems:

1. the knife edge support is easy to cause local damage to the end part of the concrete column. When the knife edge support is used for loading, eccentric load is applied through a knife edge, local stress is difficult to release due to insufficient rigidity of a hinge plate of the loading device, and local stress concentration is easily caused on the loading end part of the knife edge support by the concrete column, so that the end part of the concrete column is cracked and damaged.

2. The eccentric distance is not easy to control when the spherical support is loaded. When the spherical support is used for loading, although the problem of local damage can be effectively solved, the initial eccentric distance of the loading is not easy to be accurately controlled because the eccentric load is applied through the spherical hinges at the two ends, and meanwhile, the actual eccentric distance may be changed in the eccentric loading process.

3. The vertical loading arrangement of the concrete column is difficult. Because concrete column size is big, weight is big, is difficult to vertical fixed when actually fixing and laying, not only the eccentricity is difficult accurate adjustment, because the too big component bending deformation easily leads to the component to incline in addition the test procedure, has the potential safety hazard. Therefore, in the loading process of an actual test, in order to facilitate positioning and ensure safe loading, a transverse concrete column loading mode is sometimes adopted, but the transverse concrete column loading is obviously inconsistent with the actual situation, the lateral stiffness of the concrete column is greatly influenced due to the influence of the bearing platform on the lateral limit of the concrete column, and the test data result has larger deviation from the vertical loading result.

The steel pipe concrete is a structural member formed by filling concrete in a steel pipe and capable of bearing an external load together with the steel pipe and core concrete thereof, and can be divided into circular, square, rectangular and polygonal steel pipe concrete columns according to different cross-sectional forms.

The steel pipe concrete superposed column is formed by superposing steel pipe concrete in the middle of the section and steel pipe reinforced concrete outside the section, and can be a square section, a rectangular section or a circular section. The inner and outer components of the composite column can be constructed in different periods or simultaneously. The different-phase construction means that concrete in the pipe is poured to form the concrete filled steel tubular column, vertical load during part of construction period is borne, and concrete outside the pipe is poured.

Concrete filled steel tubular column and concrete filled steel tubular composite column adopt above-mentioned eccentric pressure device of tradition, also have the same problem, promptly:

1. the size of the test piece is large, and the operation is not easy;

2. the constraint conditions at the two ends of the test piece are difficult to meet; the loading devices at the two ends are difficult to align;

3. it is difficult to ensure that the specimen is vertical prior to preloading.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a steel pipe concrete column eccentric loading device, which is especially suitable for the eccentric loading device of the steel pipe concrete column, can conveniently carry, position and align a loading test device, improves the working efficiency of the experiment, the test accuracy and other advantages, and solves the problems that the size of a test piece is large and the operation is difficult; the constraint conditions at the two ends of the test piece are difficult to meet; the loading devices at the two ends are difficult to align; the vertical test piece is difficult to ensure before preloading.

(II) technical scheme

For realizing above-mentioned especially eccentric loading device who is fit for steel core concrete column, transport, location that can be convenient and the loading test device that aligns improve the work efficiency and the test accuracy degree purpose of experiment, the utility model provides a following technical scheme: the eccentric loading device for the concrete-filled steel tube column comprises a male hinge plate, a female hinge plate and a steel backing plate, wherein an inverted trapezoidal steel plate is arranged on the male hinge plate, trapezoidal grooves are formed in the corresponding positions of the female hinge plate, through holes are formed in the peripheries of the male hinge plate and the female hinge plate, high-strength bolts can be connected into the through holes to enable the female hinge plate and the male hinge plate to be located in the horizontal direction and the vertical direction, and a screw is sleeved with a sleeve, so that the female hinge plate and the male hinge plate are located accurately in the. The bottom of the female hinge plate is provided with a convex cone, a corresponding position on the steel backing plate is provided with a groove, and the convex cone is inserted into the groove to ensure that the loading device and the concrete-filled steel tubular column are geometrically centered.

Preferably, the periphery of the female hinge plate and the periphery of the male hinge plate are thinner than the middle of the female hinge plate and are reserved positions for bolts.

Preferably, the periphery of the female hinge plate and the male hinge plate is provided with stiffening ribs for enhancing the rigidity of the hinge plates.

Preferably, through holes are formed in the peripheries of the female hinge plate and the male hinge plate and are bolt insertion holes and steel rope fixing holes.

Preferably, the stiffening ribs and the through holes of the male hinge plate correspond to the stiffening ribs and the through holes of the female hinge plate and have the same size.

Preferably, the angle between the left oblique line and the right oblique line of the inverted trapezoidal steel plate on the male hinge plate is 60 degrees.

Preferably, the inclined line of the trapezoidal groove on the female hinge plate forms an included angle of 90 degrees.

Preferably, the convex cone is arranged right below the groove.

Preferably, the grooves on the steel backing plate are deeper than the convex cones, and the grooves are arranged along the eccentric direction.

(III) advantageous effects

Compared with the prior art, the utility model provides an eccentric loading device of steel core concrete column possesses following beneficial effect:

1. the eccentric loading test device for the concrete filled steel tubular column has the advantages that the high-strength bolt, the bolt sleeve, the convex cone, the groove in the steel base plate and the steel rope are arranged, so that the loading device and the member are connected into a whole before the member is placed on the press, the eccentricity is accurately positioned, the member is physically centered, the bolt is loosened after the member is placed on the press, the bolt sleeve and the steel rope are removed, and the loading can be started.

2. By arranging the high-strength bolt and the bolt sleeve, the female hinge plate and the male hinge plate can be conveniently leveled and centered before loading.

3. By arranging the convex cone and the steel base plate groove, the loading device and the component are accurately positioned, and the eccentricity is accurate.

4. Through setting up the steel cable for loading device, component can be fixed, and the component of being convenient for is moved to the testing machine, and is safe relatively.

5. By providing stiffening ribs, the rigidity of the hinge plate is enhanced.

Drawings

FIG. 1 is a schematic view of the overall structure of an eccentric loading device for a concrete filled steel tubular column according to the present invention;

FIG. 2 is a schematic structural view of a male hinge plate of the eccentric loading device for a steel core concrete column of the present invention;

FIG. 3 is a schematic view of the structure of a female hinge plate of the eccentric loading device for a steel core concrete column of the present invention;

FIG. 4 is a schematic structural view of an upper backing plate of the eccentric loading device for a steel core concrete column of the present invention;

FIG. 5 is a schematic view of a lower bolster structure of the eccentric loading device for a steel core concrete column of the present invention;

figure 6 is the utility model discloses an eccentric loading device's of steel core concrete column assembly schematic diagram.

In the figure: 1. a male hinge plate; 2. a female hinge plate; 3. a steel backing plate; 4. a stiffening rib; 5. a through hole; 6. an inverted trapezoidal steel plate; 7. a trapezoidal groove; 8. a convex cone; 9. a steel backing plate groove; 10. a high-strength bolt; 11. a bolt bushing; 12. a steel pipe concrete column; 13. a steel cord; 14. a lower base plate; 15. an upper base plate; 16. and (6) pouring holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, an eccentric loading test device for a concrete filled steel tubular column comprises a male hinge plate 1, a female hinge plate 2 and a steel backing plate 3.

Further, component manufacturing: welding the steel pipes on the lower backing plate 14 and the upper backing plate 15, erecting the formwork, and then pouring concrete. The concrete in the pipe is poured from the pouring hole 16 of the upper mat 15. And if the steel pipe concrete composite column is adopted, a hole is formed in the side face of the template, and the concrete outside the template is poured from the hole in the side face of the template.

Further, the member is placed vertically and the device 1 of the invention is placed on the bottom and top of the member, the loading device is fixed with bolts and bolt sleeves, and then the member 12 and the loading device are tightened with steel cables 13.

Further, the components are brought to the tester to be centered and preloaded.

Further, the high tensile bolt, sleeve and steel cord were removed.

Further, test loading was started.

The working principle is as follows: manufacturing a component: welding the steel pipe on the lower backing plate 14 and the upper backing plate 15, supporting the template, then pouring concrete, and pouring concrete in the pipe from the pouring hole 16 of the upper backing plate 15. If the steel pipe concrete composite column is used, a hole is formed in the side face of the formwork, concrete outside the pipe is poured from the hole in the side face of the formwork, the member is vertically placed, the bottom and the top of the member are respectively provided with a sleeve 1 of the device, the loading device is fixed through a bolt and a bolt sleeve, then the member 12 and the loading device are tensioned through a steel rope 13, the member is conveyed to a testing machine to be centered and preloaded, the high-strength bolt, the sleeve and the steel rope are removed, and the test loading is started.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an eccentric loading device of concrete filled steel tubular column, includes positive hinge plate (1), negative hinge plate (2), steel backing plate (3), bolt sleeve (11), concrete filled steel tubular column (12), lower bolster (14), upper padding plate (15) and pours hole (16), its characterized in that: the steel tube concrete column loading device is characterized in that an inverted trapezoidal steel plate (6) is arranged on the male hinge plate (1), trapezoidal grooves (7) are formed in corresponding positions of the female hinge plate (2), through holes (5) are formed in the peripheries of the male hinge plate (1) and the female hinge plate (2), high-strength bolts (10) can be connected in the through holes (5) to enable the female hinge plate (2) and the male hinge plate (1) to be connected, bolt sleeves (11) are aligned to the through holes (5), so that the female hinge plate (2) and the male hinge plate (1) are accurately positioned in the horizontal and vertical directions, convex cones (8) are arranged at the bottom of the female hinge plate (2), steel backing plate grooves (9) are formed in corresponding positions on the steel backing plate (3), and the convex cones (8) are inserted into the steel backing plate grooves (9) to enable the loading.

2. The eccentric loading device of concrete filled steel tubular column according to claim 1, characterized in that: the peripheries of the female hinge plate (2) and the male hinge plate (1) are thinner than the middle, and the peripheries are reserved positions for the high-strength bolts (10).

3. The eccentric loading device of concrete filled steel tubular column according to claim 1, characterized in that: and stiffening ribs (4) are arranged around the female hinge plate and the male hinge plate, and the stiffening ribs (4) are used for enhancing the rigidity of the hinge plates.

4. The eccentric loading device of concrete filled steel tubular column according to claim 1, characterized in that: through holes (5) are formed around the female hinge plate (2) and the male hinge plate (1) and are high-strength bolt (10) through holes and steel rope (13) fixing holes.

5. The eccentric loading device of concrete filled steel tubular column according to claim 1, characterized in that: the stiffening ribs (4) and the through holes (5) of the male hinge plate (1) correspond to the stiffening ribs (4) and the through holes (5) of the female hinge plate (2) and have the same size.

6. The eccentric loading device of concrete filled steel tubular column according to claim 1, characterized in that: the included angle of the left oblique line and the right oblique line of the inverted trapezoidal steel plate (6) on the male hinge plate (1) is 60 degrees.

7. The eccentric loading device of concrete filled steel tubular column according to claim 1, characterized in that: the included angle of the left oblique line and the right oblique line of the trapezoidal groove (7) on the female hinge plate (2) is 90 degrees.

8. The eccentric loading device of concrete filled steel tubular column according to claim 1, characterized in that: the convex cone (8) is arranged right below the trapezoidal groove (7).

9. The eccentric loading device of concrete filled steel tubular column according to claim 1, characterized in that: the steel backing plate groove (9) on the steel backing plate (3) is deeper than the convex cone (8), and the steel backing plate groove (9) is arranged along the eccentric direction.