Preparation mold and preparation method of steel plate concrete bonding slippage test piece

Abstract

The invention discloses a preparation mold and a preparation method of a steel plate concrete bonding slippage test piece, the preparation mold comprises a bottom mold, and a first side mold, a second side mold, a first end mold and a second end mold which are mounted on the bottom mold, the first side mold and the second side mold are symmetrically arranged, and the first end mold and the second end mold are mounted between the first side mold and the second side mold; a plurality of grooves are formed in the first side mold and the second side mold; the first end mold and the second end mold are mounted in one of the grooves; and the first end mold and the second end mold are provided with open grooves for mounting a steel plate test piece. The multiple grooves are formed, the first end mold and the second end mold are installed in the different grooves to achieve preparation of test pieces of different lengths, multiple test pieces of different sizes can be prepared through one mold, the mold utilization rate is increased, and the mold cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of concrete component molds, and in particular to a mold and a method for preparing a steel plate concrete bonding slip test piece. Background Art

[0002] Steel-reinforced concrete composite structures are widely used in engineering. The bonding performance between steel plates and concrete affects their stress state, so the study of bonding performance has received extensive attention from scholars. The factors that affect the bonding slip performance between steel plates and concrete mainly include concrete strength grade, concrete cover thickness and bonding length. Therefore, to study the bonding performance, it is necessary to prepare steel plate concrete specimens of different sizes and thicknesses. At present, one mold is usually used to prepare specimens of one size. If specimens of multiple sizes need to be prepared, molds of multiple sizes need to be customized, resulting in low mold utilization and high costs. Summary of the invention

[0003] Purpose of the invention: In view of the above shortcomings, the present invention provides a mold and method for preparing a steel plate concrete bonding slip specimen.

[0004] Technical solution: To solve the above problems, the present invention adopts a mold for preparing a steel plate concrete bonding slip specimen, including a bottom mold and a first side mold, a second side mold, a first end mold, and a second end mold installed on the bottom mold, the first side mold and the second side mold are symmetrically arranged, the first end mold and the second end mold are installed between the first side mold and the second side mold; the first side mold and the second side mold are each provided with a plurality of grooves, the first end mold and the second end mold are installed in one of the grooves; the first end mold and the second end mold are provided with grooves for installing steel plate specimens.

[0005] Furthermore, the bottom mold includes a bottom mold top plate and a bottom mold side plate installed at the bottom of the bottom mold top plate, and the bottom mold top plate and the bottom mold side plate are surrounded to form a box-type structure with an open bottom end; the bottom mold top plate is provided with two rows of elliptical screw holes for installing the first side mold and the second side mold and two rows of circular holes for installing the first end mold and the second end mold.

[0006] Furthermore, the first side mold and the second side mold are arranged relatively to each other and have the same structure. The first side mold includes a side mold top plate and a side mold side plate installed on the bottom of the side mold top plate. The side mold top plate and the side mold side plates surround to form a box-type structure with an open bottom end. Screw holes are opened on the side mold side plate in contact with the bottom mold, and bolts are installed in the screw holes and the elliptical screw holes of the bottom mold.

[0007] Furthermore, a plurality of grooves are formed on the upper surface of the side mold top plate and run through the upper and lower surfaces, and the axial direction of the grooves is perpendicular to the upper surface of the bottom mold top plate.

[0008] Furthermore, the side mold top plate is provided with reinforcement screw holes, and both ends of the bolts are respectively installed in the reinforcement screw holes of the first side mold and the second side mold.

[0009] Furthermore, the first end mold includes a first bottom plate and two first vertical plates, the first bottom plate is provided with an oblong hole, and bolts are installed in the oblong hole and the circular hole of the bottom mold; a first slot for installing a steel plate specimen is provided on one side of the first bottom plate that is perpendicular to the longitudinal axis of the oblong hole, and the two first vertical plates are respectively installed on both sides of the first slot.

[0010] Furthermore, the second end mold includes a second bottom plate and two second vertical plates, the second bottom plate is provided with an oblong hole, and bolts are installed in the oblong hole and the circular hole of the bottom mold; a second slot for installing the steel plate specimen is provided on one side of the second bottom plate that is perpendicular to the longitudinal axis of the oblong hole, and the two second vertical plates are respectively installed on both sides of the second slot.

[0011] Furthermore, the first slot is rectangular, the second slot is in the shape of a "convex" character, and the short side of the upper end of the convex character is located on one side of the second bottom plate.

[0012] Furthermore, a supporting rib is provided between the first bottom plate and the first vertical plate, and a supporting rib is also provided between the second bottom plate and the second vertical plate.

[0013] The present invention also provides a preparation method using the preparation mold, providing a steel plate test piece and a steel bar with the same shape as the groove, wherein the steel plate test piece comprises two parallel steel plates, and a loading end plate perpendicular to the steel plates is welded at one end of the steel plate; specifically comprising the following steps:

[0014] S1, installing the first side mold and the second side mold on the bottom mold;

[0015] S2. Select a groove according to the preset specimen size, install the side edges of the first end mold and the second end mold in the groove, insert steel bars into other grooves, and fix the first end mold and the second end mold on the bottom mold;

[0016] S3, installing the steel plate specimen in the slots of the first end mold and the second end mold;

[0017] S4, pouring concrete between the first side form and the steel plate close to the first side form, and between the second side form and the steel plate close to the second side form;

[0018] S5. Remove the mold and take out the prepared test piece.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: (1) by setting a plurality of grooves, the first end mold and the second end mold are installed in different grooves to realize the preparation of specimens of different lengths, so that one mold can be used to prepare specimens of multiple sizes, thereby improving the mold utilization rate and reducing the mold cost; (2) in addition to the adjustable length, the width of the prepared specimen can also be adjusted, and it is only necessary to replace the end molds of different widths, which also reduces the cost compared to replacing the entire mold; (3) the preparation method of the present invention realizes the integrated preparation of steel plate concrete specimens, is simple to operate, and has high preparation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the mold prepared in the present invention;

[0021] Figure 2 This is a schematic diagram of the bottom mold structure of the present invention;

[0022] Figure 3 This is a bottom view of the bottom mold structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the side mold structure of the present invention;

[0024] Figure 5 This is a schematic structural diagram of the side mold of the present invention from another viewing angle;

[0025] Figure 6 This is a schematic diagram of the first end mold structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the second end mold structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the overall structure when preparing a test piece according to the present invention. DETAILED DESCRIPTION

[0028] like Figure 1 As shown, a mold for preparing a steel plate concrete bonding slip specimen in this embodiment includes a base mold 1 and a first side mold 2, a second side mold 3, a first end mold 4, and a second end mold 5 installed on the base mold 1. The first side mold 2 and the second side mold 3 are symmetrically arranged, and the first end mold 4 and the second end mold 5 are installed between the first side mold 2 and the second side mold 3.

[0029] like Figure 2 and Figure 3As shown, the bottom mold 1 includes a bottom mold top plate 11 and a bottom mold side plate 12 installed at the bottom of the bottom mold top plate. The bottom mold top plate 11 and the bottom mold side plate 12 surround to form a box-shaped structure with an open bottom end. The bottom mold top plate 11 and the bottom mold side plate 12 are connected by welding. In order to further ensure the structural strength of the bottom mold, two ribs 15 parallel to each other are also arranged at the bottom of the bottom mold top plate. Two rows of elliptical screw holes 13 for installing the first side mold 2 and the second side mold 3 and two rows of round holes 14 for installing the first end mold 4 and the second end mold 5 are opened on the bottom mold top plate 11.

[0030] like Figure 4 and Figure 5 As shown, the first side mold 2 and the second side mold 3 are arranged oppositely and have the same structure. The first side mold 2 includes a side mold top plate 21 and a side mold side plate 22 installed at the bottom of the side mold top plate. The side mold top plate 21 and the side mold side plate 22 surround to form a box-shaped structure with an open bottom end. The side mold top plate 21 and the side mold side plate 22 are connected by welding. In order to further ensure the structural strength of the side mold, two ribs 26 parallel to each other are also arranged at the bottom of the side mold top plate. The side mold side plate 22 in contact with the bottom mold 1 is provided with a screw hole 23, and the bolt is installed in the screw hole 23 and the elliptical screw hole 13 of the bottom mold to fix the side mold on the bottom mold. According to the preset width of the prepared specimen, the installation position of the side mold on the bottom mold can also be adjusted, that is, the installation position of the bolt in the elliptical screw hole 13 is adjusted to adjust the distance between the first side mold 2 and the second side mold 3, thereby reaching the preset width. Accordingly, the first end mold 4 and the second end mold 5 of various width sizes are prepared in advance to adapt to the different distances between the first side mold 2 and the second side mold 3.

[0031] The upper end surface of the side mold top plate 21 is provided with a plurality of grooves 24 that penetrate up and down, and the axial direction of the grooves 24 is perpendicular to the upper end surface of the bottom mold top plate 11. In this embodiment, each side mold is provided with eight grooves, four on each side, which are used to install the first side mold 2 and the second side mold 3 respectively. In order to further ensure the strength of the mold when preparing the test piece, the side mold top plate 21 is also provided with reinforcement screw holes 25, and the two ends of the bolts are respectively installed in the reinforcement screw holes 25 of the first side mold 2 and the second side mold 3. In this embodiment, a total of four reinforcement bolts are provided.

[0032] like Figure 6 As shown, the first end mold 4 includes a first bottom plate 41 and two first vertical plates 42, and a supporting rib 45 is provided between the first bottom plate 41 and the first vertical plates 42. The side of the first vertical plate 42 is installed in the groove, and an oblong hole 43 is opened on the first bottom plate 41. Bolts are installed in the oblong hole 43 and the circular hole of the bottom mold to fix the first end mold 4 on the bottom mold 1. A first slot 44 for installing the steel plate specimen is opened on one side of the first bottom plate 41 perpendicular to the longitudinal axis of the oblong hole 43. The first slot 44 is rectangular, and the two first vertical plates 42 are installed on both sides of the first slot 44 respectively.

[0033] like Figure 7As shown, the second end mold 5 includes a second bottom plate 51 and two second vertical plates 52, and a supporting rib 55 is also provided between the second bottom plate 51 and the second vertical plates 52. The side of the second vertical plate 52 is installed in the groove, and an oblong hole 53 is opened on the second bottom plate 51. Bolts are installed in the oblong hole 53 and the circular hole of the bottom mold to fix the second end mold 5 on the bottom mold 1. A second slot 54 for installing the steel plate specimen is opened on one side of the second bottom plate 51 perpendicular to the longitudinal axis of the oblong hole 53. The second slot 54 is in the shape of a "convex" character, and the short side of the upper end of the convex character is located on one side of the second bottom plate 51. The two second vertical plates 52 are installed on both sides of the second slot 54 respectively.

[0034] The present invention also provides a preparation method using the above-mentioned preparation mold, and during preparation, a steel plate test piece 6 and a steel bar having the same shape as the groove are provided. The steel plate test piece includes two parallel steel plates 61, between which a plurality of equally spaced tie plates 63 are welded, and one end of the steel plate 61 is also welded with a loading end plate 62 perpendicular to the steel plate. Specifically, the following steps are included:

[0035] S1. Install the first side mold 2 and the second side mold 3 on the bottom mold 1. Adjust the distance between the first side mold 2 and the second side mold 3 according to the width of the prepared specimen, and install bolts in the screw holes 23 and the elliptical screw holes 13 of the bottom mold to fix the side mold on the bottom mold.

[0036] S2. Select grooves according to the preset specimen length, install the sides of the first vertical plate 42 and the second vertical plate 52 in the grooves, insert steel bars in other grooves, and make the upper end surface of the steel bars flush with the upper end surface of the side mold top plate 21. Install bolts in the oblong holes of the bottom plate and the circular holes of the bottom mold, and fix the first bottom plate 41 and the second bottom plate 51 on the bottom mold 1.

[0037] S3, install the steel plate specimen 3 in the slots of the first end mold 4 and the second end mold 5, install the loading end plate 62 in the second slot 54, and install the other end of the steel plate specimen 6 in the first slot 44. Install the bolts in the reinforcement screw holes 25, tighten the first side mold 2 and the second side mold 3, and place the concrete to prevent leakage.

[0038] S4. Pour concrete between the first side form 2 and the steel plate 61 close to the first side form 3 , and between the second side form 3 and the steel plate close to the second side form 3 .

[0039] S5, dismantle the mold, first remove the reinforcing bolts, remove the first end mold 4, the second end mold 5, then remove the first side mold 2, the second side mold 3, and take out the prepared test piece. Clean the mold for next use.

[0040] The present invention provides multiple grooves, and the first end mold and the second end mold are installed in different grooves to realize the preparation of specimens of different lengths, so that one mold can prepare specimens of multiple different sizes, improve the mold utilization rate, and reduce the mold cost; in addition to the adjustable length, the width of the prepared specimen can also be adjusted, and only the end molds of different widths need to be replaced, which also reduces the cost compared to replacing the entire mold. At the same time, the preparation method of the present invention realizes the integrated preparation of steel plate concrete specimens, is simple to operate, and has high preparation efficiency.

Claims

1. A mold for preparing a steel plate concrete bonding slip specimen, characterized in that: The invention comprises a bottom mold (1) and a first side mold (2), a second side mold (3), a first end mold (4) and a second end mold (5) installed on the bottom mold (1); the first side mold (2) and the second side mold (3) are symmetrically arranged; the first end mold (4) and the second end mold (5) are installed between the first side mold (2) and the second side mold (3); the first side mold (2) and the second side mold (3) are both provided with a plurality of grooves; the first end mold (4) and the second end mold (5) are installed in one of the grooves; the first end mold (4) and the second end mold (5) are provided with grooves for installing steel plate specimens.

2. The mold for preparing the steel plate concrete bonding slip specimen according to claim 1, characterized in that: The bottom mold (1) comprises a bottom mold top plate (11) and a bottom mold side plate (12) installed at the bottom of the bottom mold top plate, and the bottom mold top plate (11) and the bottom mold side plate (12) are surrounded to form a box-shaped structure with an open bottom end; the bottom mold top plate (11) is provided with two rows of elliptical screw holes (13) for installing a first side mold (2) and a second side mold (3) and two rows of round holes (14) for installing a first end mold (4) and a second end mold (5).

3. The mold for preparing the steel plate concrete bonding slip specimen according to claim 1, characterized in that: The first side mold (2) and the second side mold (3) are arranged opposite to each other and have the same structure. The first side mold (2) comprises a side mold top plate (21) and a side mold side plate (22) installed at the bottom of the side mold top plate. The side mold top plate (21) and the side mold side plate (22) surround and form a box-shaped structure with an open bottom end. The side mold side plate (22) in contact with the bottom mold (1) is provided with a screw hole (23), and a bolt is installed in the screw hole (23) and the elliptical screw hole (13) of the bottom mold.

4. The mold for preparing the steel plate concrete bonding slip specimen according to claim 3, characterized in that: The upper end surface of the side mold top plate (21) is provided with a plurality of grooves (24) penetrating vertically, and the axial direction of the grooves (24) is perpendicular to the upper end surface of the bottom mold top plate (11).

5. The mold for preparing the steel plate concrete bonding slip specimen according to claim 3, characterized in that: The side mold top plate (21) is also provided with a reinforcing screw hole (25), and the two ends of the bolt are respectively installed in the reinforcing screw holes (25) of the first side mold (2) and the second side mold (3).

6. The mold for preparing the steel plate concrete bonding slip specimen according to claim 1, characterized in that: The first end mold (4) comprises a first bottom plate (41) and two first vertical plates (42); the first bottom plate (41) is provided with an oblong hole (43), and bolts are installed in the oblong hole (43) and the circular hole of the bottom mold; a first slot (44) for installing a steel plate specimen is provided on one side of the first bottom plate (41) perpendicular to the longitudinal axis of the oblong hole (43), and the two first vertical plates (42) are respectively installed on both sides of the first slot (44).

7. The mold for preparing the steel plate concrete bonding slip test piece according to claim 6, characterized in that: The second end mold (5) comprises a second bottom plate (51) and two second vertical plates (52); the second bottom plate (51) is provided with an oblong hole (53), and bolts are installed in the oblong hole (53) and the circular hole of the bottom mold; a second slot (54) for installing a steel plate specimen is provided on one side of the second bottom plate (51) perpendicular to the longitudinal axis of the oblong hole (53), and the two second vertical plates (52) are respectively installed on both sides of the second slot (54).

8. The mold for preparing the steel plate concrete bonding slip test piece according to claim 7, characterized in that: The first slot (44) is rectangular, and the second slot (54) is in the shape of a "convex" character, with the short side of the upper end of the convex character being located on one side of the second bottom plate (51).

9. The mold for preparing the steel plate concrete bonding slip test piece according to claim 7, characterized in that: A supporting rib (45) is provided between the first bottom plate (41) and the first vertical plate (42), and a supporting rib (55) is also provided between the second bottom plate (51) and the second vertical plate (52).

10. A method for preparing a mold using any one of claims 1 to 9, characterized in that: A steel plate test piece (6) and a steel bar having the same shape as the groove are provided, wherein the steel plate test piece comprises two parallel steel plates (61), and a loading end plate (62) perpendicular to the steel plates is welded to one end of the steel plates. Specifically, the following steps are included: S1, installing the first side mold (2) and the second side mold (3) on the bottom mold (1); S2, selecting a groove according to the preset specimen size, installing the side edges of the first end mold (4) and the second end mold (5) in the groove, inserting steel bars into other grooves, and fixing the first end mold (4) and the second end mold (5) on the bottom mold (1); S3, installing the steel plate test piece (6) in the slots of the first end mold (4) and the second end mold (5); S4, pouring concrete between the first side form (2) and the steel plate (61) close to the first side form (2), and between the second side form (3) and the steel plate close to the second side form (3); S5. Remove the mold and take out the prepared test piece.

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