Cross-shaped steel member

Abstract

The utility model discloses a cross-shaped steel member, and belongs to the technical field of steel members. Comprising a cross-shaped steel tube bundle and N T-shaped connecting plates arranged at the ends of four arms of the cross-shaped steel tube bundle side by side in a front-back mode, the T-shaped connecting plates on the four arms are arranged in a one-to-one correspondence mode, each T-shaped connecting plate comprises a welding plate and a straight connecting plate, and the welding plates are welded and fixed to the corresponding arms; two fixed reinforcing pieces are arranged on the inner side of the welding plate side by side, the two fixed reinforcing pieces are welded and fixed to the two sides of the corresponding arms respectively, each fixed reinforcing piece comprises two fixed reinforcing plates arranged side by side front and back, the fixed reinforcing plates are arranged along the corresponding arms, and the length of each fixed reinforcing plate is 1.1-1.4 times of the width of a single steel tube bundle; n L-shaped reinforcing ribs are arranged between every two adjacent arms and correspond to the T-shaped connecting plates side by side front and back, and each T-shaped connecting plate is correspondingly provided with one L-shaped reinforcing rib; the two edges of the L-shaped reinforcing rib are welded to the two corresponding arms respectively, and the two ends of the L-shaped reinforcing rib are welded and fixed to the fixed reinforcing plates of the T-shaped connecting plates at the ends of the corresponding arms respectively.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of steel member, especially relates to a cross-shaped steel member. BACKGROUND

[0002] At present, in engineering construction, according to the material of main structure, commonly used are two kinds of concrete structure and steel structure. Steel pipe bundle combined structure shear wall is effectively combined with concrete structure to become a new type of lateral force resisting member, fully gives play to the advantages of building layout flexibility of concrete shear wall, high industrialization degree of steel structure production and fast construction speed, and simultaneously gives play to the material performance advantages of light weight and high strength of steel and large rigidity of concrete. The joint is the key part connecting steel beam and shear wall, and the internal force of beam and wall is transmitted through the joint, and the safety and reliability of the joint are the prerequisite for guaranteeing the safe operation of structure. Therefore, only the shear wall and the plate or beam become a whole, and the shear wall keeps continuous, under the action of external force such as earthquake force, horizontal counterforce or horizontal shear force can be transmitted, and the safety of building is guaranteed.

[0003] For example, the patent with application number CN201410018360.4 discloses a cross-shaped steel pipe bundle combined structure, which is composed of a cross-shaped steel pipe bundle assembly, the cross-shaped steel pipe bundle assembly is composed of a plurality of steel pipe units connected in sequence, the steel pipe unit has a cavity, and the cavity is filled with cast-in-place concrete.

[0004] For example, the patent with application number CN202210085782.8 discloses a beam-wall connecting joint, which comprises a steel pipe bundle component and a steel beam, the steel pipe bundle component comprises a plurality of U-shaped steels connected in sequence in the horizontal direction, the opening of the U-shaped steel is connected with the bottom plate of the U-shaped steel adjacent thereto, the middle part of the U-shaped steel at the end is a replacement cavity formed by replacing a steel plate with a thickness greater than that of the U-shaped steel, a horizontal partition plate is arranged in the replacement cavity and corresponds to the positions of the upper flange and the lower flange of the steel beam, the horizontal partition plate is vertically connected to the bottom plate of the U-shaped steel at the end, and the two ends of the horizontal partition plate are connected with the side plates of the U-shaped steel.

[0005] For example, the patent with application number CN202220295380.6 discloses a half-partition plate type steel pipe concrete bundle shear wall beam-wall joint, which comprises a shear wall and a steel beam, the end U-shaped steel of the shear wall is provided with a T-shaped connecting piece for connecting with the web of the steel beam, two horizontal partition plates for connecting with the flange plates of the steel beam and two side plates, the side plates are welded to the side surfaces of the shear wall, the end surfaces of the side plates are flush with the end surfaces of the end U-shaped steel, the horizontal partition plates are inserted into the partition plate grooves of the end U-shaped steel and the side plates, and the horizontal partition plates are welded to the end U-shaped steel and the side plates.

[0006] From the above patent, it can be seen that the existing cross-shaped steel member includes a cross-shaped steel pipe bundle arranged along the front and back and N T-shaped connecting plates arranged side by side in front of and behind the end portions of the four arms, the T-shaped connecting plates on the four arms are arranged one by one, the T-shaped connecting plate includes a welding plate and a straight connecting plate, the welding plate is welded and fixed on the corresponding arm, and the straight connecting plate is connected with the beam or the web. The T-shaped connecting plate serves as a connecting joint and requires high joint strength and rigidity. The patent with application number CN202220295380.6 strengthens the connection between the T-shaped connecting plate and the steel pipe bundle, but needs to groove the steel pipe bundle, which affects the strength of the steel pipe bundle. Practical new type content

[0007] In order to solve the foregoing problems, the utility model embodiment provides a cross-shaped steel member, the connection between the T-shaped connecting plate and the cross-shaped steel pipe bundle is strengthened, and the structure will not only not affect the strength of the steel pipe bundle, but also strengthen the strength of the steel pipe bundle. The technical scheme is as follows:

[0008] The utility model embodiment provides a cross-shaped steel member, which comprises a cross-shaped steel pipe bundle 1 arranged along the front and back and N T-shaped connecting plates 2 arranged side by side in front of and behind the end portions of the four arms 3, the T-shaped connecting plates 2 on the four arms 3 are arranged one by one, the T-shaped connecting plate 2 comprises a welding plate 21 and a straight connecting plate 22, the welding plate 21 is welded and fixed on the corresponding arm 3, the inner side of the welding plate 21 is provided with two fixed reinforcing members side by side, two fixed reinforcing members are respectively welded and fixed on the two sides of the corresponding arm 3 and both comprise two fixed reinforcing plates 23 arranged side by side in front of and behind, the fixed reinforcing plate 23 is arranged along the corresponding arm 3 and the length is 1.1-1.4 times of the width of a single steel pipe bundle, N L-shaped reinforcing ribs 4 are arranged side by side in front of and behind between the two adjacent arms 3 and the corresponding T-shaped connecting plate 2, one L-shaped reinforcing rib 4 is arranged corresponding to each T-shaped connecting plate 2, two edges of the L-shaped reinforcing rib 4 are welded on the corresponding two arms 3 and the two ends are respectively welded and fixed on the fixed reinforcing plate 23 of the T-shaped connecting plate 2 at the end portion of the corresponding arm 3.

[0009] Preferably, the welding plate 21 in the utility model embodiment is a rectangular plate arranged along the front and back, the two long edges extend outward relative to the corresponding side of the corresponding arm 3 to form a flange, the end face of the corresponding end of the L-shaped reinforcing rib 4 abuts against the flange and is welded and fixed on the flange.

[0010] Further, the two edges of the L-shaped reinforcing rib 4 and the corresponding arm 3 in the utility model embodiment are both provided with at least one longitudinal reinforcing rib 5, the longitudinal reinforcing rib 5 is arranged along the front and back and is welded and fixed with the L-shaped reinforcing rib 4 and the T-shaped steel pipe bundle 1, a plurality of longitudinal reinforcing ribs 5 are located on the same side of the L-shaped reinforcing rib 4, the longitudinal reinforcing rib 5 is a right-angled plate, and the two right-angled edges are respectively welded and fixed on the L-shaped reinforcing rib 4 and the corresponding arm 3.

[0011] Specifically, the width of the fixed reinforcing plate 23 is 35-80mm, and the thickness is 3-6mm; the L-shaped reinforcing rib 4 is welded by a steel strip with a width of 20-55mm and a thickness of 4-8mm; the thickness of the longitudinal reinforcing rib 5 is 5-8mm.

[0012] Specifically, the front part and the rear part of the four arms 3 are each provided with a T-shaped connecting plate 2; the four T-shaped connecting plates 2 at the front part of the cross-shaped steel pipe bundle 1 are located on the same left-right plane, and the four T-shaped connecting plates 2 at the rear part of the cross-shaped steel pipe bundle 1 are located on the same left-right plane.

[0013] Among them, the cross-shaped steel pipe bundle 1 in the embodiment of the utility model includes upper arm 11, lower arm 12, left arm 13 and right arm 14, upper arm 11, lower arm 12, left arm 13 and right arm 14 are located at the upper side, the lower side, the left side and the right side of cross-shaped steel pipe bundle 1 respectively, upper arm 11 and lower arm 12 are oppositely arranged and both are vertically arranged, left arm 13 and right arm 14 are oppositely arranged and both are arranged along the left-right direction; the upper end of the upper arm 11, the lower end of the lower arm 12, the left end of the left arm 13 and the right end of the right arm 14 are all front and rear side by side with N T-shaped connecting plates 2; two fixed reinforcing pieces on the upper arm 11 and the lower arm 12 are respectively located on the left and right sides thereof, and two fixed reinforcing pieces on the left arm 13 and the right arm 14 are respectively located on the upper and lower sides thereof; the L-shaped reinforcing rib 4 includes a vertical edge and a horizontal edge; for the L-shaped reinforcing rib 4 between the upper arm 11 and the left arm 13, the vertical edge is fixed on the left side of the upper arm 11, and the upper end thereof is fixed on the fixed reinforcing plate 23 on the left side of the T-shaped connecting plate 2 at the upper end of the upper arm 11, and the horizontal edge is fixed on the upper side of the left arm 13, and the left end thereof is fixed on the fixed reinforcing plate 23 on the upper side of the T-shaped connecting plate 2 at the left end of the left arm 13; for the L-shaped reinforcing rib 4 between the left arm 13 and the lower arm 12, the vertical edge is fixed on the left side of the lower arm 12, and the lower end thereof is fixed on the fixed reinforcing plate 23 on the left side of the T-shaped connecting plate 2 at the lower end of the lower arm 12, and the horizontal edge is fixed on the lower side of the left arm 13, and the left end thereof is fixed on the fixed reinforcing plate 23 on the lower side of the T-shaped connecting plate 2 at the left end of the left arm 13; for the L-shaped reinforcing rib 4 between the lower arm 12 and the right arm 14, the vertical edge is fixed on the right side of the lower arm 12, and the lower end thereof is fixed on the fixed reinforcing plate 23 on the right side of the T-shaped connecting plate 2 at the lower end of the lower arm 12, and the horizontal edge is fixed on the lower side of the right arm 14, and the right end thereof is fixed on the fixed reinforcing plate 23 on the lower side of the T-shaped connecting plate 2 at the right end of the right arm 14; for the L-shaped reinforcing rib 4 between the right arm 14 and the upper arm 11, the vertical edge is fixed on the right side of the upper arm 11, and the upper end thereof is fixed on the fixed reinforcing plate 23 on the right side of the T-shaped connecting plate 2 at the upper end of the upper arm 11, and the horizontal edge is fixed on the upper side of the right arm 14, and the right end thereof is fixed on the fixed reinforcing plate 23 on the upper side of the T-shaped connecting plate 2 at the right end of the right arm 14.

[0014] Further, the left and right sides of the front and rear ends of the upper arm 11 and the lower arm 12 and the upper and lower sides of the front and rear ends of the left arm 13 and the right arm 14 are provided with T-shaped hole plates 6; the T-shaped hole plates 6 are arranged along the front and rear directions.

[0015] In the embodiment of the utility model, the T-shaped hole plate 6 includes a rectangular hole plate 61 and two rectangular plates 62 on both sides of the rectangular hole plate 61, and the rectangular hole plate 61 and the two rectangular plates 62 form a T shape; the rectangular hole plate 61 is located at the middle part of the corresponding arm 3 and is arranged along the front and rear directions, and two rows of through holes are arranged side by side on the rectangular hole plate 61; each row of through holes includes a plurality of through holes arranged side by side in front and behind; the rectangular plate 62 is arranged along the left and right directions and is aligned with the front end or the rear end of the corresponding arm 3; the rectangular hole plate 61 and the rectangular plate 62 are welded and fixed on the corresponding arm 3 and are fixed between them by welding, and the thickness of the rectangular hole plate 61 is greater than the thickness of the rectangular plate 62.

[0016] The technical scheme provided by the embodiment of the utility model has the beneficial effects that the embodiment of the utility model provides a cross-shaped steel member, the connection between the T-shaped connecting plate and the cross-shaped steel pipe bundle is strengthened, and the structure does not affect the strength of the steel pipe bundle but strengthens the strength of the steel pipe bundle. In addition, the T-shaped hole plate not only serves as a connecting structure but also strengthens the cross-shaped steel pipe bundle. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a front view of the cross-shaped steel member in the embodiment of the utility model;

[0018] Figure 2 is a left view of the cross-shaped steel member in the embodiment of the utility model;

[0019] Figure 3 is a top view of the cross-shaped steel member in the embodiment of the utility model;

[0020] Figure 4 is Figure 2 a partial enlarged view of

[0021] In the drawing: 1 cross-shaped steel pipe bundle, 2 T-shaped connecting plate, 3 arm, 4 L-shaped reinforcing rib, 5 longitudinal reinforcing rib, 6 T-shaped hole plate;

[0022] 11 upper arm, 12 lower arm, 13 left arm, 14 right arm;

[0023] 21 welded plate, 22 straight connecting plate, 23 fixed reinforcing plate;

[0024] 61 rectangular hole plate, 62 rectangular plate. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0026] Example 1

[0027] See Figures 1-4 Example 1 provides a cross-shaped steel component, including a cross-shaped steel tube bundle 1 arranged in the front-to-back direction and N T-shaped connecting plates 2 arranged side-by-side at the ends of its four arms 3, with each T-shaped connecting plate 2 on the four arms 3 corresponding to the others. Each T-shaped connecting plate 2 includes a welded plate 21 and a straight connecting plate 22. The welded plate 21 is welded and fixed to the corresponding arm 3, and is a rectangular plate arranged in the front-to-back direction. Two fixing reinforcing members are arranged side-by-side on the inner side of the welded plate 21, and are welded and fixed to both sides (left and right sides or top and bottom sides) of the corresponding arm 3, each including two fixing reinforcing plates 23 arranged side-by-side. The fixing reinforcing plates 23 are arranged along the corresponding arm 3, and their length is 1.1-1.4 times the width of a single steel tube bundle. Specifically, they are rectangular plates with a width of 35-80 mm and a thickness of 3-6 mm. N L-shaped reinforcing ribs 4 are arranged side-by-side between adjacent arms 3 and at the corresponding T-shaped connecting plates 2, with one L-shaped reinforcing rib 4 corresponding to each T-shaped connecting plate 2. The two sides of the L-shaped reinforcing rib 4 are welded to the corresponding two arms 3 respectively, and its two ends are welded and fixed to the fixing reinforcing plate 23 of the T-shaped connecting plate 2 at the end of the corresponding arm 3 respectively.

[0028] Among them, see Figures 1-4 The cross-shaped steel tube bundle 1 in this embodiment of the present invention includes an upper arm 11, a lower arm 12, a left arm 13, and a right arm 14. The upper arm 11, lower arm 12, left arm 13, and right arm 14 are located on the upper, lower, left, and right sides of the cross-shaped steel tube bundle 1, respectively, and are each composed of multiple steel tube bundles arranged side by side. The upper arm 11 and lower arm 12 are arranged opposite each other and are both vertically oriented, while the left arm 13 and right arm 14 are arranged opposite each other and are both oriented in the left-right direction. N T-shaped connecting plates 2 are arranged side by side at the upper end of the upper arm 11, the lower end of the lower arm 12, the left end of the left arm 13, and the right end of the right arm 14. The two fixing reinforcing members of the T-shaped connecting plates 2 on the upper arm 11 and lower arm 12 are located on their left and right sides, respectively, while the two fixing reinforcing members of the T-shaped connecting plates 2 on the left arm 13 and right arm 14 are located on their upper and lower sides, respectively. The L-shaped reinforcing rib 4 includes a vertical side and a horizontal side, with the vertical side arranged vertically and the horizontal side arranged horizontally in the left-right direction. Specifically, the L-shaped reinforcing rib 4 is welded from steel strips with a width of 20-55mm and a thickness of 4-8mm. That is, both the vertical and horizontal sides are steel strips with a width of 20-55mm and a thickness of 4-8mm.

[0029] For the L-shaped reinforcing rib 4 between the upper arm 11 and the left arm 13, the vertical side is fixed to the left side of the upper arm 11 and its upper end is fixed to the fixed reinforcing plate 23 on the left side of the T-shaped connecting plate 2 at the upper end of the upper arm 11, and the horizontal side is fixed to the upper side of the left arm 13 and its left end is fixed to the fixed reinforcing plate 23 on the upper side of the T-shaped connecting plate 2 at the left end of the left arm 13.

[0030] For the L-shaped reinforcing rib 4 between the left arm 13 and the lower arm 12, the vertical side is fixed to the left side of the lower arm 12 and its lower end is fixed to the fixed reinforcing plate 23 on the left side of the T-shaped connecting plate 2 at the lower end of the lower arm 12, and the horizontal side is fixed to the lower side of the left arm 13 and its left end is fixed to the fixed reinforcing plate 23 on the lower side of the T-shaped connecting plate 2 at the left end of the left arm 13.

[0031] For the L-shaped reinforcing rib 4 between the lower arm 12 and the right arm 14, the vertical side is fixed to the right side of the lower arm 12 and its lower end is fixed to the fixing reinforcing plate 23 on the right side of the T-shaped connecting plate 2 at the lower end of the lower arm 12, and the horizontal side is fixed to the lower side of the right arm 14 and its right end is fixed to the fixing reinforcing plate 23 on the lower side of the T-shaped connecting plate 2 at the right end of the right arm 14.

[0032] For the L-shaped reinforcing rib 4 between the right arm 14 and the upper arm 11, the vertical side is fixed to the right side of the upper arm 11 and its upper end is fixed to the fixing reinforcing plate 23 on the right side of the T-shaped connecting plate 2 at the upper end of the upper arm 11, and the horizontal side is fixed to the upper side of the right arm 14 and its right end is fixed to the fixing reinforcing plate 23 on the upper side of the T-shaped connecting plate 2 at the right end of the right arm 14.

[0033] Preferably, in this embodiment of the invention, the two long sides of the welding plate 21 extend outward relative to the corresponding sides (left and right sides or downward sides) of the corresponding arm 3 to form flanges, and the end face of the corresponding end of the L-shaped reinforcing rib 4 abuts against the flange and is welded and fixed to the flange. Specifically, the left and right ends of the welding plate 21 on the upper arm 11 extend relative to the left and right sides of the upper arm 11 to form flanges, and the upper end of the L-shaped reinforcing rib 4 on the left side is fixed to the lower side of the flange on the left side.

[0034] Further, see Figures 1-4 In this embodiment of the invention, at least one longitudinal reinforcing rib 5 is provided between each of the two sides of the L-shaped reinforcing rib 4 and the corresponding arm 3; if multiple longitudinal reinforcing ribs 5 are provided on the sides of the L-shaped reinforcing rib 4, the longitudinal reinforcing ribs 5 are arranged side by side in the direction of the corresponding arm 3. The longitudinal reinforcing ribs 5 are arranged in the front-rear direction and are fixed to the L-shaped reinforcing rib 4 and the T-shaped steel tube bundle 1 by welding. Multiple longitudinal reinforcing ribs 5 are located on the same side (front or rear) of the L-shaped reinforcing rib 4. The longitudinal reinforcing rib 5 is a right-angled plate, with its two right-angled sides welded and fixed to the L-shaped reinforcing rib 4 and the corresponding arm 3 respectively, and its thickness is 5-8mm.

[0035] Example 2

[0036] SeeFigures 1-3 Example 2 provides a cruciform steel component, whose structure is basically the same as that of Example 1, except that: in this example, each of the four arms 3 has a T-shaped connecting plate 2 at both the front and rear. Therefore, the number of T-shaped connecting plates 2 is eight. The four T-shaped connecting plates 2 at the front of the cruciform steel tube bundle 1 are located on the same left-right plane, and the four T-shaped connecting plates 2 at the rear of the cruciform steel tube bundle 1 are located on the same left-right plane. The total number of fixed reinforcing plates 23 is 32; the total number of L-shaped reinforcing ribs 3 is eight, and the total number of T-shaped connecting plates 2 is eight.

[0037] Example 3

[0038] See Figures 1-4 Example 3 provides a cross-shaped steel component, whose structure is basically the same as that of Example 1, except that: in this example, T-shaped perforated plates 6 are provided on the left and right sides of the front and rear ends of the upper arm 11 and lower arm 12, and on the upper and lower sides of the front and rear ends of the left arm 13 and right arm 14. The T-shaped perforated plates 6 are arranged in the front-to-back direction. The T-shaped perforated plate 6 includes a rectangular perforated plate 61 and two rectangular plates 62 on both sides, forming a T-shape. The rectangular perforated plate 61 is located in the middle of the corresponding arm 3, and is arranged in the front-to-back direction, with two rows of through holes arranged side by side. Each row of through holes includes multiple through holes (specifically, round holes) arranged side by side. The rectangular plates 62 are arranged in the left-to-right direction, and are aligned with the front or rear end of the corresponding arm 3. The rectangular perforated plate 61 and the rectangular plates 62 are welded and fixed to the corresponding arm 3, and are fixed together by welding. The thickness of the rectangular perforated plate 61 is greater than the thickness of the rectangular plates 62, and the front-to-back length of the rectangular perforated plate 61 is greater than the front-to-back width of the rectangular plates 62.

[0039] Example 4

[0040] See Figures 1-4 Example 4 provides a cross-shaped steel component, whose structure is basically the same as that of Example 3, except that: in this example, the upper arm 11, lower arm 12, left arm 13, and right arm 14 are all composed of two steel tube bundles arranged side by side. A longitudinal reinforcing rib 5 is provided between each of the two sides of the L-shaped reinforcing rib 4 and the corresponding arm 3. The longitudinal reinforcing rib 5 is located on the second steel tube bundle (counting from the end towards the middle of the cross-shaped steel tube bundle 1), and it is located on the side of the L-shaped reinforcing rib 4 near the corresponding end (front end or rear end).

[0041] Example 5

[0042] Example 5 provides a cross-shaped steel component, whose structure is basically the same as that of Example 3, except that: in this example, the length of the fixing reinforcing plate 23 is 1.15 times the width of a single steel tube bundle, its width is 45mm, and its thickness is 4mm. The L-shaped reinforcing rib 4 is welded from steel bars with a width of 40mm and a thickness of 5mm. The thickness of the longitudinal reinforcing rib 5 is 6mm. Each row of through holes includes three through holes arranged side by side, and the diameter of the through holes is 1cm. The thickness of the rectangular perforated plate 61 is 3mm, and its width in the left and right direction is 25cm. The thickness of the rectangular plate 62 is 2mm, and its width in the left and right direction is 15cm.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cross-shaped steel component, comprising a cross-shaped steel tube bundle (1) arranged in a front-to-back direction and N T-shaped connecting plates (2) arranged side-by-side at the ends of its four arms (3), wherein the T-shaped connecting plates (2) on the four arms (3) are arranged in a one-to-one correspondence, and the T-shaped connecting plate (2) comprises a welded plate (21) and a straight connecting plate (22), wherein the welded plate (21) is welded and fixed to the corresponding arm (3); characterized in that, The inner side of the welding plate (21) is provided with two fixed reinforcing members arranged side by side. The two fixed reinforcing members are respectively welded and fixed on both sides of the corresponding arm (3) and each of them includes two fixed reinforcing plates (23) arranged side by side. The fixed reinforcing plates (23) are arranged along the corresponding arm (3) and their length is 1.1-1.4 times the width of a single steel pipe bundle. Between two adjacent arms (3) and at the corresponding T-shaped connecting plate (2), N L-shaped reinforcing ribs (4) are arranged side by side. Each T-shaped connecting plate (2) is provided with one L-shaped reinforcing rib (4). The two sides of the L-shaped reinforcing rib (4) are respectively welded to the two corresponding arms (3) and their two ends are respectively welded and fixed to the fixed reinforcing plates (23) of the T-shaped connecting plate (2) at the end of the corresponding arm (3).

2. The cross-shaped steel component according to claim 1, characterized in that, The welding plate (21) is a rectangular plate arranged in the front-back direction. Its two long sides extend outward relative to the corresponding side of the corresponding arm (3) to form a flange. The end face of the corresponding end of the L-shaped reinforcing rib (4) abuts against the flange and is welded and fixed to the flange.

3. The cross-shaped steel component according to claim 1, characterized in that, At least one longitudinal reinforcing rib (5) is provided between each of the two sides of the L-shaped reinforcing rib (4) and the corresponding arm (3). The longitudinal reinforcing rib (5) is arranged in the front-back direction and is fixed to the L-shaped reinforcing rib (4) and the T-shaped steel tube bundle (1) by welding. Multiple longitudinal reinforcing ribs (5) are located on the same side of the L-shaped reinforcing rib (4). The longitudinal reinforcing rib (5) is a right-angled plate, and its two right-angled sides are welded and fixed to the L-shaped reinforcing rib (4) and the corresponding arm (3) respectively.

4. The cross-shaped steel component according to claim 3, characterized in that, The fixed reinforcing plate (23) has a width of 35-80mm and a thickness of 3-6mm; the L-shaped reinforcing rib (4) is welded from steel bars with a width of 20-55mm and a thickness of 4-8mm; the longitudinal reinforcing rib (5) has a thickness of 5-8mm.

5. The cross-shaped steel component according to claim 4, characterized in that, Each of the four arms (3) has a T-shaped connecting plate (2) at the front and rear. The four T-shaped connecting plates (2) at the front of the cross-shaped steel tube bundle (1) are located on the same left-right plane, and the four T-shaped connecting plates (2) at the rear of the cross-shaped steel tube bundle (1) are located on the same left-right plane.

6. The cross-shaped steel component according to claim 1, characterized in that, The cross-shaped steel tube bundle (1) includes an upper arm (11), a lower arm (12), a left arm (13), and a right arm (14). The upper arm (11), lower arm (12), left arm (13), and right arm (14) are located on the upper, lower, left, and right sides of the cross-shaped steel tube bundle (1), respectively. The upper arm (11) and lower arm (12) are arranged opposite each other and are both vertically oriented. The left arm (13) and right arm (14) are arranged opposite each other and are both oriented along the left and right sides. The upper end of the upper arm (11), the lower end of the lower arm (12), the left end of the left arm (13), and the right end of the right arm (14) are each provided with N T-shaped connecting plates (2) arranged side by side; the two fixed reinforcing members on the upper arm (11) and the lower arm (12) are respectively located on their left and right sides, and the two fixed reinforcing members on the left arm (13) and the right arm (14) are respectively located on their upper and lower sides; the L-shaped reinforcing rib (4) includes a vertical side and a horizontal side; For the L-shaped reinforcing rib (4) between the upper arm (11) and the left arm (13), the vertical side is fixed to the left side of the upper arm (11) and its upper end is fixed to the fixed reinforcing plate (23) on the left side of the T-shaped connecting plate (2) at the upper end of the upper arm (11), and the horizontal side is fixed to the upper side of the left arm (13) and its left end is fixed to the fixed reinforcing plate (23) on the upper side of the T-shaped connecting plate (2) at the left end of the left arm (13); For the L-shaped reinforcing rib (4) between the left arm (13) and the lower arm (12), the vertical side is fixed to the left side of the lower arm (12) and its lower end is fixed to the fixed reinforcing plate (23) on the left side of the T-shaped connecting plate (2) at the lower end of the lower arm (12), and the horizontal side is fixed to the lower side of the left arm (13) and its left end is fixed to the fixed reinforcing plate (23) on the lower side of the T-shaped connecting plate (2) at the left end of the left arm (13); For the L-shaped reinforcing rib (4) between the lower arm (12) and the right arm (14), the vertical side is fixed to the right side of the lower arm (12) and its lower end is fixed to the fixing reinforcing plate (23) on the right side of the T-shaped connecting plate (2) at the lower end of the lower arm (12), and the horizontal side is fixed to the lower side of the right arm (14) and its right end is fixed to the fixing reinforcing plate (23) on the lower side of the T-shaped connecting plate (2) at the right end of the right arm (14); For the L-shaped reinforcing rib (4) between the right arm (14) and the upper arm (11), the vertical side is fixed to the right side of the upper arm (11) and its upper end is fixed to the fixing reinforcing plate (23) on the right side of the T-shaped connecting plate (2) at the upper end of the upper arm (11), and the horizontal side is fixed to the upper side of the right arm (14) and its right end is fixed to the fixing reinforcing plate (23) on the upper side of the T-shaped connecting plate (2) at the right end of the right arm (14).

7. The cruciform steel component according to claim 6, characterized in that, T-shaped perforated plates (6) are provided on the left and right sides of the front and rear ends of the upper arm (11) and lower arm (12), and on the upper and lower sides of the front and rear ends of the left arm (13) and right arm (14); the T-shaped perforated plates (6) are arranged in the front and rear direction.

8. The cross-shaped steel component according to claim 7, characterized in that, The T-shaped perforated plate (6) includes a rectangular perforated plate (61) and two rectangular plates (62) on both sides, the rectangular perforated plate (61) and the two rectangular plates (62) forming a T shape; the rectangular perforated plate (61) is located in the middle of the corresponding arm (3), it is arranged in the front-to-back direction, and two rows of through holes are arranged side by side on it; each row of through holes includes multiple through holes arranged side by side in the front-to-back direction; the rectangular plate (62) is arranged in the left-to-right direction, and it is aligned with the front end or rear end of the corresponding arm (3); the rectangular perforated plate (61) and the rectangular plate (62) are welded and fixed on the corresponding arm (3) and they are fixed together by welding, the thickness of the rectangular perforated plate (61) is greater than the thickness of the rectangular plate (62).

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