Steel-UHPC bridge deck slab stud system

Abstract

The utility model relates to the technical field of bridge deck slab studs, and provides a steel-UHPC bridge deck slab stud system which comprises a stud cap, a groove is formed in one face of the stud cap, a stud column is arranged on the face, away from the groove, of the stud cap, a welding part is arranged at the end, away from the stud cap, of the stud column, and the stud column is in a circular truncated cone shape; the ceramic ring is used for sleeving the stud column, the inner diameter of the upper end of the ceramic ring is smaller than the diameter of the bottom end of the stud column, and the inner diameter of the lower end of the ceramic ring is not smaller than the diameter of the bottom end of the stud column. The utility model can solve the problem of unreasonable stress after the stud of the traditional bridge deck slab is welded, so that the root of the stud is not easy to cut off, and the stability of the connection between the stud and the bridge deck slab is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge deck bolts, and in particular to a steel-UHPC bridge deck bolt system. Background Art

[0002] Studs are widely used in steel structures and steel-UHPC (ultra-high performance concrete) composite structures due to their excellent shear resistance, especially in the deck pavement of steel bridges. Studs are also called cylindrical head studs. The studs are standard cylinders with the same diameter at both ends. Arc stud welding is usually used. In order to protect the welding pool and the shape of the weld leg and to concentrate the heat for weld formation, a ceramic ring needs to be installed on each stud.

[0003] At present, the welding of steel-UHPC bridge deck bolts adopts traditional bolts and ceramic rings. The traditional bolt column is a standard cylinder with a small connection area with the steel bridge deck and low shear resistance. Many tests on bolt connectors of steel-UHPC composite structures show that the failure mode of the specimens is mainly the shearing of the roots of the bolts and the bridge deck. It can be seen that the welding area and the quality of the welding between the bolts and the bridge deck largely determine the shear performance of the steel-UHPC composite structure.

[0004] Therefore, in view of the above problems, a steel-UHPC bridge deck bolt system is proposed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model develops a steel-UHPC bridge deck bolt system, which can solve the problem of unreasonable force on traditional bridge deck bolts after welding, making the roots of the bolts less likely to be sheared off and improving the stability of the connection between the bolts and the bridge deck.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A steel-UHPC bridge deck bolt system comprises: a bolt, comprising a bolt cap, a groove is arranged on one surface of the bolt cap, a bolt column is arranged on the surface of the bolt cap away from the groove, a welding portion is arranged on the end of the bolt column away from the bolt cap, and the bolt column is arranged in a truncated cone shape; a ceramic ring, the ceramic ring is used to be sleeved on the bolt column, the inner diameter of the upper end of the ceramic ring is smaller than the diameter of the bottom end of the bolt column, and the inner diameter of the lower end of the ceramic ring is not less than the diameter of the bottom end of the bolt column.

[0008] Preferably, the bolt cap is configured to be disc-shaped, and the outer contour of the bolt cap is configured to be a bolt cap arc segment.

[0009] Preferably, the groove is configured as a disc-shaped groove, the side wall of the groove is connected to the top surface of the bolt cap via arc segment one fillet, and the side wall of the groove is connected to the bottom surface of the groove via arc segment two fillets.

[0010] Preferably, the axis of the groove and the axis of the bolt column are located in the same straight line.

[0011] Preferably, the bolt cap and the bolt column are made in one piece, and the bottom surface of the bolt cap and the top of the side surface of the bolt column are connected by three rounded corners of an arc segment.

[0012] Preferably, the diameter of the truncated cone-shaped bolt column is smaller at one end close to the bolt cap, and larger at one end away from the bolt cap.

[0013] Preferably, the diameter of the bolt cap is larger than the diameter of the upper end of the bolt column and smaller than the inner diameter of the upper end of the porcelain ring.

[0014] As a preferred method, a plurality of ceramic ring teeth are provided around the bottom of the ceramic ring to protect the molten pool and the shape of the weld foot.

[0015] The effects provided in the utility model content are only the effects of the embodiments, not all the effects of the utility model. The above technical solution has the following advantages:

[0016] 1. The utility model provides a truncated cone-shaped bolt column, the bottom diameter of which is larger than the top diameter, thereby ensuring the connection strength between the bolt column and the steel bridge deck after welding, effectively reducing the occurrence of the connection between the root of the bolt column and the bridge deck being easily sheared, and improving the safety of use;

[0017] 2. The utility model provides a rounded connection of arc segment 3, so that the connection between the bolt cap and the bolt column is more stable, stress concentration is reduced, and the bolt cap is effectively and firmly mortised to the UHPC, thereby improving the bonding between the two and improving the stability of the steel-UHPC connection;

[0018] 3. The utility model provides a ceramic ring, and makes the inner ring of the ceramic ring fit the surface of the bottom of the bolt column, and ceramic ring teeth are provided at the bottom of the ceramic ring, thereby improving the safety of the bolt in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of a bolt according to an embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of a ceramic ring according to an embodiment of the utility model;

[0023] Figure 4 The figure is a cross-sectional schematic diagram of a stud and a ceramic ring according to an embodiment of the utility model.

[0024] In the figure, 1, bolt cap; 2, groove; 3, bolt column; 4, welding part; 5, ceramic ring; 6, bolt cap arc segment; 7, arc segment one; 8, arc segment two; 9, arc segment three; 10, ceramic ring teeth. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-4 As shown, the utility model provides a technical solution:

[0027] A steel-UHPC bridge deck bolt system comprises: a bolt, comprising a bolt cap 1, a groove 2 is provided on one surface of the bolt cap 1, the bolt cap 1 and the groove 2 are used to extend into the clamping end of the welding gun to facilitate welding, a bolt column 3 is arranged on the surface of the bolt cap 1 away from the groove 2, a welding portion 4 is arranged on the end of the bolt column 3 away from the bolt cap 1, and the bolt column 3 is arranged in a truncated cone shape; a ceramic ring 5, the ceramic ring 5 is used to be sleeved on the bolt column 3, the inner diameter of the upper end of the ceramic ring 5 is smaller than the diameter of the bottom end of the bolt column 3 and larger than the diameter of the top end of the bolt column 3, and the inner diameter of the lower end of the ceramic ring 5 is not less than the diameter of the bottom end of the bolt column 3, so as to facilitate the assembly of the bolt and the ceramic ring 5 and prevent the ceramic ring from falling off, thereby having better practicality.

[0028] In this embodiment, the bolt cap 1 is set to be disc-shaped, and the outer contour of the bolt cap 1 is set to be a bolt cap arc segment 6. The bolt cap arc segment 6 is an arc, preferably a 180° arc, which facilitates the bolt cap 1 to enter the clamping end of the welding gun and improves the efficiency of bolt welding.

[0029] In this embodiment, the groove 2 is configured as a disc-shaped groove, the side wall of the groove 2 is connected to the top surface of the bolt cap 1 through the rounded corner of arc segment 1 7, and the side wall of the groove 2 is connected to the bottom surface of the groove 2 through the rounded corner of arc segment 2 8. The rounded connection of arc segment 1 7 and arc segment 2 8 facilitates quick entry into the clamping end of the welding gun, thereby improving the efficiency of the bolt when in use.

[0030] In this embodiment, the axis of the groove 2 is on the same straight line as the axis of the bolt column 3, and the upper and lower centers of the truncated cone of the bolt column 3 are both on the axis of the groove 2, which improves the practicality of the bolt when in use.

[0031] In this embodiment, the bolt cap 1 and the bolt column 3 are made in one piece, and the bottom surface of the bolt cap 1 and the top of the side surface of the bolt column 3 are connected by the rounded corner of the arc segment 3 9. The rounded corner connection of the arc segment 3 9 solves the problem of excessive stress concentration at the connection between the bolt cap and the bolt column to a large extent, and improves the stability of the connection between the bolt cap 1 and the UHPC.

[0032] In this embodiment, the diameter of the truncated cone-shaped bolt column 3 is small at the end close to the bolt cap 1, and large at the end away from the bolt cap 1, thereby increasing the firmness of the bolt column 3 after welding to the steel bridge deck. Compared with traditional bolts, it is not easy to be sheared at the connection, thereby improving the safety of construction.

[0033] In this embodiment, the diameter of the bolt cap 1 is larger than the diameter of the upper end of the bolt column 3 and smaller than the inner diameter of the upper end of the ceramic ring 5, which facilitates the insertion of the ceramic ring 5 and makes it difficult for the ceramic ring 5 to fall out, thereby improving safety.

[0034] In this embodiment, the inner ring shape of the ceramic ring 5 is a truncated cone that fits the outer surface of the stud column 3. The outer ring shape of the ceramic ring 5 can be cylindrical or other shapes without affecting the use effect of the ceramic ring 5. A number of ceramic ring teeth 10 are evenly arranged on the bottom of the ceramic ring 5 in the circumferential direction to protect the molten pool and the shape of the weld foot during stud welding, avoid affecting the stud welding quality, and improve the firmness of the connection between the stud and the UHPC.

[0035] Working principle: First, the studs and ceramic rings 5 ​​are prefabricated in the factory and are convenient to use at the construction site; when in use, the construction personnel first put the ceramic ring 5 on the stud, specifically, the end with a larger inner diameter of the ceramic ring 5 is inserted from the bolt cap 1, and because the diameter of the end with a smaller inner diameter of the ceramic ring 5 is smaller than the diameter of the bottom of the stud column 3, the ceramic ring 5 is stuck at the bottom of the stud column 3; the area to be welded on the steel bridge deck is polished; the construction personnel hold the stud welding machine in one hand, and the stud welding machine can be a conventional welding machine on the market, and the construction personnel hold the stud with the ceramic ring on in the other hand, insert the bolt cap 1 of the stud into the clamping end of the stud welding machine, and then contact the welding part 4 at the bottom of the stud column 3 with the area to be welded of the steel bridge deck, start the stud welding machine, and the welding of a stud can be completed. At this time, the ceramic ring 5 can protect the molten pool and the shape of the weld foot of the welding, and repeat the operation to complete the stud welding of the entire steel bridge deck.

[0036] The parts not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A steel-UHPC bridge deck bolt system, characterized in that: include: A bolt comprises a bolt cap (1), a groove (2) being formed on one surface of the bolt cap (1), a bolt column (3) being arranged on a surface of the bolt cap (1) away from the groove (2), a welding portion (4) being arranged on an end of the bolt column (3) away from the bolt cap (1), and the bolt column (3) being arranged in a truncated cone shape; A ceramic ring (5) is used to be sleeved on the bolt column (3), the inner diameter of the upper end of the ceramic ring (5) is smaller than the diameter of the bottom end of the bolt column (3) and larger than the diameter of the top end of the bolt column (3), and the inner diameter of the lower end of the ceramic ring (5) is not smaller than the diameter of the bottom end of the bolt column (3).

2. A steel-UHPC bridge deck bolt system according to claim 1, characterized in that: The bolt cap (1) is configured to be disc-shaped, and the outer contour of the bolt cap (1) is configured to be a bolt cap arc segment (6).

3. A steel-UHPC bridge deck bolt system according to claim 2, characterized in that: The groove (2) is configured as a disc-shaped groove, the side wall of the groove (2) is connected to the top surface of the bolt cap (1) via an arc segment 1 (7) rounded corner, and the side wall of the groove (2) is connected to the bottom surface of the groove (2) via an arc segment 2 (8) rounded corner.

4. A steel-UHPC bridge deck bolt system according to claim 3, characterized in that: The axis of the groove (2) and the axis of the bolt column (3) are on the same straight line.

5. A steel-UHPC bridge deck bolt system according to claim 4, characterized in that: The bolt cap (1) and the bolt column (3) are made in an integrated manner, and the bottom surface of the bolt cap (1) and the top of the side surface of the bolt column (3) are connected via arc segment three (9) fillets.

6. A steel-UHPC bridge deck bolt system according to claim 5, characterized in that: The diameter of the truncated cone-shaped bolt column (3) is small at one end close to the bolt cap (1), and large at one end away from the bolt cap (1).

7. A steel-UHPC bridge deck bolt system according to claim 6, characterized in that: The diameter of the bolt cap (1) is larger than the diameter of the upper end of the bolt column (3) and smaller than the inner diameter of the upper end of the porcelain ring (5).

8. A steel-UHPC bridge deck bolt system according to claim 7, characterized in that: A plurality of ceramic ring teeth (10) are provided in the circumferential direction of the bottom of the ceramic ring (5) for protecting the molten pool and the shape of the welding foot.

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