Section structure of rolled T profile

Abstract

The invention discloses a profile structure of a rolled T profile. The profile structure comprises a ball head part and a web plate, the ball head part and the web are integrally formed; the top of the ball head part is a top surface, and the ball head part and the web take the midperpendicular of the top surface as a symmetrical center line; the two ends of the top face are each provided with an upper inclined face, and the lower ends of the two upper inclined faces are each connected with a lower inclined face. The lower ends of the two lower inclined surfaces are respectively connected to two end surfaces of the web plate; the upper inclined surface inclines outwards from the end part of the top surface; the lower slope inclines inwards from the lower end of the upper slope. According to the method, better profile shape selection is provided, the steel structure weight is reduced, the structural design scheme is optimized, and profile section shape design is optimized.

Description

Technical Field

[0001] The invention relates to the technical field of ships, and in particular to a rolled T-shaped material cross-section structure. Background Art

[0002] The most commonly used profile form in ships today is the welded T-profile, which involves connecting a horizontally set panel with a web extending vertically from the middle of the panel. Traditionally, this project requires a lot of manual work, including manual assembly and spot welding, followed by manual pull welding. For traditional welded T-profiles, due to the limitations of the welding process, when the panel is narrow and thick, it is very easy to have process problems such as welding deformation during welding. In a corrosive environment, the best mechanical properties can only be obtained under the same structural weight when the panel is narrow and thick. Traditional welded T-profiles are difficult to make into the optimal cross-sectional shape due to the limitations of the welding process.

[0003] In addition, T-type welding also includes the production of T-joints. This is a common joint form. Depending on the thickness of the web, different groove forms can be used for welding. In the construction welding method, transverse welding is an important link, which ensures the firm connection of the two plates. During operation, attention should be paid to the selection of the speed of the welding current to ensure the quality and beauty of the weld.

[0004] Another commonly used profile in the prior art is bulb flat steel. It is composed of a flat web and a spherical ball head, and is an asymmetric steel. The production of bulb flat steel mainly follows the GB / T9945-2012 standard, and some companies also implement the European standard, EN10067:1996.

[0005] The size of bulb flat steel is generally divided according to the nominal width, with the smallest specification being 8# and the largest being 43# (the maximum nominal width is 430mm). Each specification has 2-5 different thicknesses. There are not many specifications.

[0006] The prior art has the following defects:

[0007] First, welding T-profiles are often cut and polished by the shipyards themselves, which consumes a lot of labor costs and material loss costs.

[0008] Second, when welding narrow and thick panels and webs, welding problems such as welding deformation, poor weld formation, undercuts, and weld bumps are very likely to occur. Although using wider and thinner panels can reduce welding problems, it is impossible to use the optimal section form for design and reduce the weight of the steel structure.

[0009] Thirdly, for the existing rolled asymmetric bulb flat bars, although the above-mentioned welding problems do not exist, the maximum height in the asymmetric bulb flat bar profile library is only 430 mm. Since the mechanical properties of ship profiles are mainly determined by the web height, the sizes of some bulb flat bar profiles on medium and large ships cannot meet the requirements of ship specifications. Therefore, the application of bulb flat bars on medium and large ships is very limited. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to overcome the above-mentioned defects existing in the prior art and provide a rolled T-profile section structure.

[0011] The present invention solves the above technical problem through the following technical solutions:

[0012] A rolled T-profile section structure includes a spherical head and a web connected to the spherical head; the spherical head and the web are integrally formed; the top of the spherical head is the top surface, and both the spherical head and the web are symmetrically centered on the perpendicular bisector of the top surface; each end of the top surface is provided with an upper inclined surface, and each lower end of the two upper inclined surfaces is respectively connected to a lower inclined surface; each lower end of the two lower inclined surfaces is respectively connected to the two end faces of the web; the upper inclined surface inclines outward from the end of the top surface; the lower inclined surface inclines inward from the lower end of the upper inclined surface.

[0013] Furthermore, the connection between the lower inclined surface and the end face of the web, the connection between the upper inclined surface and the lower inclined surface, and the connection between the top surface and the upper inclined surface are all rounded structures.

[0014] Furthermore, the distance h from the top surface to the bottom of the web and the width t of the spherical head f have the following relationship:

[0015] When h ≤ 230 mm, t f = 0.2×h + 6 mm;

[0016] When 230 mm < h ≤ 330 mm, t f = 0.2×h + 8 mm;

[0017] When 330 mm < h ≤ 430 mm, t f = 0.2×h + 10 mm;

[0018] When h > 430 mm, t f = 0.2×h + 12 mm.

[0019] Furthermore, the relationship between the arc radius R1 at the connection between the lower inclined surface and the end face of the web and the distance h from the top surface to the bottom of the web is:

[0020] When h ≤ 230 mm, R1 = 9 - 11 mm;

[0021] When 230mm < h ≤ 330mm, R1 = 11 - 13mm;

[0022] When 330mm < h ≤ 430mm, R1 = 13 - 15mm;

[0023] When h > 430mm, R1 = 15 - 17mm.

[0024] Furthermore, the relationship between the arc radius R2 at the connection of the upper inclined plane and the lower inclined plane and the distance h from the top surface to the bottom of the web is:

[0025] When h ≤ 230mm, R2 = 9 - 11mm;

[0026] When 230mm < h ≤ 330mm, R2 = 11 - 13mm;

[0027] When 330mm < h ≤ 430mm, R2 = 13 - 15mm;

[0028] When h > 430mm, R2 = 15 - 17mm.

[0029] Furthermore, the relationship between the arc radius R3 at the connection of the top surface and the upper inclined plane and the distance h from the top surface to the bottom of the web is:

[0030] When h ≤ 230mm, R3 = 9 - 11mm;

[0031] When 230mm < h ≤ 330mm, R3 = 11 - 13mm;

[0032] When 330mm < h ≤ 430mm, R3 = 13 - 15mm;

[0033] When h > 430mm, R3 = 15 - 17mm.

[0034] Furthermore, the relationship between the arc radius R1 at the connection of the lower inclined plane and the end face of the web, the arc radius R2 at the connection of the upper inclined plane and the lower inclined plane, and the arc radius R3 at the connection of the top surface and the upper inclined plane is:

[0035] R1 = R2 = R3.

[0036] Furthermore, the angle between the top surface and the upper inclined plane is b; where, b = 55° - 65°.

[0037] Furthermore, the angle between the lower inclined plane and the horizontal plane is a; where, a = 25° - 35°.

[0038] Furthermore, the materials of the spherical head and the web are both metals.

[0039] The beneficial effects of the present invention are as follows: the present invention is a rolled T-shaped profile, and the T-shaped profile panel adopts a symmetrical ball head structure with a double-bevel design. The present invention can also be regarded as a rolled symmetrical bulb flat steel. Unlike conventional asymmetrical bulb flat steel, the ball head part of the present invention is bilaterally symmetrical, and has a significant upward stretching compared to the top surface of conventional bulb flat steel. The present invention solves the problem that the welded T-shaped profile cannot realize the design of thick panels, and also solves the disadvantage of asymmetric bulb flat steel; provides a better profile shape selection, reduces the weight of the steel structure, optimizes the structural design scheme, and optimizes the profile cross-sectional shape design. The present invention adopts a rolling process, and the rolled profile is formed once by a rolling mill, which can avoid the welding problem existing when taking the optimal cross-sectional shape; for narrow and thick symmetrical ball heads, in addition to avoiding the above-mentioned process problems such as welding deformation, it can also better reduce the loss of materials and shipyard labor costs. At the same time, the present invention has more profile size specifications, better mechanical properties and more specifications; it can meet the requirements of yielding, buckling, fatigue, etc. under the specifications of medium and large ships. The present invention can replace the use of welded T-shaped profiles and asymmetrical bulb flat steels on ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention.

[0041] Figure 2 For Figure 1 Schematic diagram for annotation.

[0042] Figure 3 It is a schematic diagram of a preferred embodiment of the present invention when the ball head height is different. DETAILED DESCRIPTION

[0043] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0044] like Figure 1 , Figure 2 As shown, a rolled T-shaped section structure includes a ball head 10 and a web 20 connected to the ball head; the ball head 10 and the web 20 are integrally formed. The ball head and the web are both made of metal.

[0045] The top of the ball head 10 is a top surface 11 , and the ball head 10 and the web 20 are both symmetrically centered about the perpendicular midline of the top surface.

[0046] An upper inclined surface 12 is respectively provided at both ends of the top surface 11 , and the lower ends of the two upper inclined surfaces 12 are respectively connected to a lower inclined surface 13 ; the lower ends of the two lower inclined surfaces 13 are respectively connected to the two end surfaces 21 of the web 20 .

[0047] The upper inclined surface 12 is inclined outward from the end of the top surface; and the lower inclined surface 13 is inclined inward from the lower end of the upper inclined surface.

[0048] At the connection between the lower inclined surface 13 and the end face 21 of the web, at the connection between the upper inclined surface 12 and the lower inclined surface 13, and at the connection between the top surface 11 and the upper inclined surface 12, there are all fillet structures 30.

[0049] The distance h from the top surface 11 to the bottom of the web 20 and the width t of the spherical head 10 f The relationship between them is:

[0050] When h ≤ 230 mm, t f = 0.2×h + 6 mm;

[0051] When 230 mm < h ≤ 330 mm, t f = 0.2×h + 8 mm;

[0052] When 330 mm < h ≤ 430 mm, t f = 0.2×h + 10 mm;

[0053] When h > 430 mm, t f = 0.2×h + 12 mm.

[0054] The relationship between the fillet radius R1 at the connection between the lower inclined surface 13 and the end face of the web 20 and the distance h from the top surface 11 to the bottom of the web 20 is:

[0055] When h ≤ 230 mm, R1 = 9 - 11 mm;

[0056] When 230 mm < h ≤ 330 mm, R1 = 11 - 13 mm;

[0057] When 330 mm < h ≤ 430 mm, R1 = 13 - 15 mm;

[0058] When h > 430 mm, R1 = 15 - 17 mm.

[0059] The relationship between the fillet radius R2 at the connection between the upper inclined surface 12 and the lower inclined surface 13 and the distance h from the top surface 11 to the bottom of the web 20 is:

[0060] When h ≤ 230 mm, R2 = 9 - 11 mm;

[0061] When 230 mm < h ≤ 330 mm, R2 = 11 - 13 mm;

[0062] When 330 mm < h ≤ 430 mm, R2 = 13 - 15 mm;

[0063] When h > 430 mm, R2 = 15 - 17 mm.

[0064] The relationship between the arc radius R3 at the connection of the top surface 11 and the upper inclined surface 12 and the distance h from the top surface 11 to the bottom of the web 20 is as follows:

[0065] When h ≤ 230 mm, R3 = 9 - 11 mm;

[0066] When 230 mm < h ≤ 330 mm, R3 = 11 - 13 mm;

[0067] When 330 mm < h ≤ 430 mm, R3 = 13 - 15 mm;

[0068] When h > 430 mm, R3 = 15 - 17 mm.

[0069] The relationship between the arc radius R1 at the connection of the lower inclined surface 13 and the end face 21 of the web, the arc radius R2 at the connection of the upper inclined surface 12 and the lower inclined surface 13, and the arc radius R3 at the connection of the top surface 11 and the upper inclined surface 12 is as follows:

[0070] R1 = R2 = R3.

[0071] In other embodiments, R1, R2, and R3 are not all equal; or, two of R1, R2, and R3 are equal.

[0072] The angle between the upper inclined surface 12 and the plane of the top surface is b; wherein, b = 55° - 65°.

[0073] The angle between the lower inclined surface 13 and the horizontal plane is a; wherein, a = 25° - 35°.

[0074] When the distance h from the top surface 11 to the bottom of the web 20 is fixed, the height T of the ball head can be changed as needed. As Figure 3 shown, the height T1 of the ball head and the height T2 of the ball head respectively correspond to two kinds of ball head heights.

[0075] The present invention is a rolled T-shaped section steel, and the T-shaped section steel panel adopts a symmetric ball head structure with a double inclined surface design. The present invention can also be regarded as a rolled symmetric bulb flat steel. Different from the conventional asymmetric bulb flat steel, the ball head part of the present invention is symmetric left and right, and the top surface of the present invention has an obvious upward stretch compared with the conventional bulb flat steel.

[0076] The present invention solves the problem that the welded T-shaped section steel cannot achieve the design of a thick panel, and at the same time also solves the drawback of the asymmetry of the bulb flat steel. The present invention provides a better choice of section steel shape, reduces the weight of the steel structure, optimizes the structural design scheme, and optimizes the sectional shape design of the section steel.

[0077] The present invention adopts a rolling process, and the rolled profile is formed in one step by a rolling mill, which can avoid the welding problem when taking the optimal cross-sectional shape; for a narrow and thick symmetrical ball head, in addition to avoiding the above-mentioned process problems such as welding deformation, it can also better reduce the loss of materials and shipyard labor costs.

[0078] At the same time, the present invention has more profile size specifications, better mechanical properties and more specifications; it can meet the requirements of yield, buckling, fatigue, etc. under the specifications of medium and large ships.

[0079] The invention can replace the use of welded T-shaped bars and asymmetric bulb flat steels on ships.

[0080] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A rolled T-shaped profile structure, comprising a ball head and a web connected to the ball head; characterized in that: The spherical head and the web are integrally formed; the top of the spherical head is the top surface, and both the spherical head and the web take the perpendicular bisector of the top surface as the symmetry center line; at each end of the top surface, there is an upper inclined surface, and a lower inclined surface is respectively connected to the lower ends of the two upper inclined surfaces; the lower ends of the two lower inclined surfaces are respectively connected to the two end faces of the web; the upper inclined surface inclines outward from the end of the top surface; the lower inclined surface inclines inward from the lower end of the upper inclined surface.

2. The rolled T-section profile structure according to claim 1, characterized in that: The connection between the lower inclined surface and the end face of the web, the connection between the upper inclined surface and the lower inclined surface, and the connection between the top surface and the upper inclined surface are all rounded structures.

3. The rolled T-section profile structure according to claim 2, characterized in that: The distance h from the top surface to the bottom of the web and the width t of the ball head f The relationship between them is: When h≤230mm, t f =0.2×h+6mm; When 230mm < h ≤ 330mm, t f = 0.2×h + 8mm; When 330mm < h ≤ 430mm, t f = 0.2×h + 10mm; When h>430mm, t f =0.2×h+12mm.

4. The rolled T-section profile structure according to claim 3, characterized in that: The relationship between the arc radius R1 at the connection between the lower inclined surface and the end face of the web and the distance h from the top surface to the bottom of the web is: When h ≤ 230 mm, R1 = 9 - 11 mm; When 230 mm < h ≤ 330 mm, R1 = 11 - 13 mm; When 330 mm < h ≤ 430 mm, R1 = 13 - 15 mm; When h > 430 mm, R1 = 15 - 17 mm.

5. The rolled T-section profile structure according to claim 3, characterized in that: The relationship between the arc radius R2 at the connection between the upper inclined surface and the lower inclined surface and the distance h from the top surface to the bottom of the web is: When h ≤ 230 mm, R2 = 9 - 11 mm; When 230 mm < h ≤ 330 mm, R2 = 11 - 13 mm; When 330 mm < h ≤ 430 mm, R2 = 13 - 15 mm; When h > 430 mm, R2 = 15 - 17 mm.

6. The rolled T-section profile structure according to claim 3, characterized in that: The relationship between the arc radius R3 at the connection between the top surface and the upper inclined surface and the distance h from the top surface to the bottom of the web is: When h ≤ 230 mm, R3 = 9 - 11 mm; When 230 mm < h ≤ 330 mm, R3 = 11 - 13 mm; When 330 mm < h ≤ 430 mm, R3 = 13 - 15 mm; When h > 430 mm, R3 = 15 - 17 mm.

7. The rolled T-section profile structure according to claim 3, characterized in that: The relationship between the arc radius R1 at the connection between the lower inclined surface and the end face of the web, the arc radius R2 at the connection between the upper inclined surface and the lower inclined surface, and the arc radius R3 at the connection between the top surface and the upper inclined surface is: R1 = R2 = R3.

8. The rolled T-section profile structure according to claim 1, characterized in that: The included angle between the top surface and the upper inclined surface is b; wherein, b = 55° - 65°.

9. The rolled T-section profile structure according to claim 1, characterized in that: The included angle between the lower inclined surface and the horizontal plane is a; wherein, a = 25° - 35°.

10. The rolled T-section profile structure according to claim 1, characterized in that: The materials of both the spherical head and the web are metals.

Images