Reinforcing structure for steel beam web opening

Abstract

The utility model discloses a reinforcing structure of a steel beam web hole, which is characterized in that a hole is formed in a steel beam web, and longitudinal stiffening ribs and transverse stiffening ribs are arranged on the periphery of the hole; wherein the longitudinal stiffening ribs are located on the upper side and the lower side of the hole and symmetrically arranged in parallel, the transverse stiffening ribs are located on the left side and the right side of the hole, and the two ends of each transverse stiffening rib are perpendicular to the longitudinal stiffening ribs on the upper side and the lower side of the hole respectively; wherein the length of the part, extending out of the edge of the hole, of the end of each longitudinal stiffening rib is two times of the width of each single-face stiffening rib, and the total width of each transverse stiffening rib is 1 / 2 of the width of a beam flange; and the thicknesses of the longitudinal stiffening ribs and the transverse stiffening ribs are consistent with the thickness of the flange plate of the steel beam. The reinforcing structure is convenient to machine, avoids collision of adjacent hole stiffening ribs, and is widely suitable for steel beam web punching.

Description

Technical Field

[0001] The utility model relates to the field of new construction and reinforcement of steel structures of building structures, and more specifically, to a reinforcement structure with a hole opened on the web of a steel beam. Background Art

[0002] Steel structures are increasingly used in residential buildings due to their high strength, light weight, good earthquake resistance and fast construction speed. In order to increase the indoor net height, equipment pipelines often need to pass through the web of steel beams. The reinforcement measures of steel beams are related to the safety of the structure and have a great impact on the construction and economy. Therefore, it is particularly important to solve the problem of strengthening the holes in steel beams.

[0003] At present, the commonly used web opening reinforcement measures include annular stiffening plate reinforcement, casing reinforcement, annular plate reinforcement, and stiffening rib reinforcement, but there are still the following problems:

[0004] 1. Reinforcement of circular openings

[0005] When the diameter of the circular opening is less than or equal to 1 / 3 of the beam height, no reinforcement is required. When it is greater than 1 / 3 of the beam height, annular stiffeners, sleeves, or annular plates may be used for reinforcement. The opening should not be set within the range of the beam height from the beam end. The diameter of the opening should not be greater than 1 / 2 of the beam height. The distance between the edges of adjacent circular openings should not be less than the beam height. The distance from the edge of the opening to the outer skin of the beam flange should not be less than 1 / 40 of the beam height. Since the span of heavy beams in residential buildings is small, the cross-section of steel beams is generally 300-400mm. According to the requirements of the specification, the diameter of the circular hole should not be greater than 200. However, electromechanical systems often have multiple pipelines passing through them, and the utilization rate of the circular hole is low. It is difficult to meet the requirements of multiple pipelines passing through. The beam span is small. It is difficult to open multiple openings while meeting the requirements of 1 times the beam height from the beam end and the distance between the edges of adjacent openings not greater than the beam height. Therefore, circular openings cannot meet the requirements of multiple pipelines passing through.

[0006] 2. Reinforcement of square openings (such as Figure 1 As shown in the "High Steel Code" practice)

[0007] The distance between the rectangular opening and the adjacent opening shall not be less than the larger value of the beam height or the rectangular opening length. The distance from the upper and lower edges of the opening to the outer skin of the beam flange shall not be less than 1 / 4 of the beam height. Figure 1 As shown, the length of the rectangular opening shall not exceed 750mm, the height of the opening shall not exceed 1 / 2 of the beam height, and the opening shall not be set within the range of the beam end equivalent to the beam height. The ends of the horizontal stiffening ribs at the upper and lower edges of the rectangular opening should extend 300mm beyond the edge of the opening. When the length of the rectangular opening is greater than the beam height, its transverse stiffening ribs should be set along the full height of the beam ( Figure 1). When the length of the opening is greater than 500mm, stiffening ribs should be set on both sides of the beam web. Since the ends of the horizontal stiffening ribs need to extend 300mm beyond the edge of the opening, the stiffening ribs often collide with each other when the adjacent openings are close, and it is also difficult to set the stiffening ribs when the adjacent openings are at different elevations. At the same time, when the beam-column at the end of the steel beam is rigidly connected, because the beam height is generally 300-400, even if the opening avoids 1 times the beam height, the stiffening ribs will collide with the bolts, which brings great difficulties to the construction. In supported steel structure houses, the collision of stiffening ribs is particularly obvious.

[0008] In order to overcome the above-mentioned shortcomings, the present application proposes a novel steel beam opening reinforcement structure, which not only avoids collision between adjacent openings, but also facilitates construction and saves steel consumption. Utility Model Content

[0009] The technical problem to be solved by the present application is that the stiffening ribs are too long when the holes in the web of heavy steel beams are opened for reinforcement, thereby affecting the beam-column connection, the beam-beam splicing nodes, and the inability to arrange electromechanical pipelines.

[0010] In order to solve the above-mentioned technical problems, the present application provides a reinforcement structure for a hole in the web of a steel beam, comprising: a hole is opened in the web of the steel beam, and longitudinal stiffening ribs and transverse stiffening ribs are arranged around the hole; wherein the longitudinal stiffening ribs are located on the upper and lower sides of the hole and are arranged in parallel and symmetrically, and the transverse stiffening ribs are located on the left and right sides of the hole, and the two ends of the longitudinal stiffening ribs are respectively perpendicular to the transverse stiffening ribs on the upper and lower sides of the hole; wherein the length of the end of the longitudinal stiffening rib extending beyond the edge of the hole is twice the width of the single-sided stiffening rib, and the total width of the transverse stiffening ribs is 1 / 2 of the beam flange width; wherein the thickness of the longitudinal stiffening ribs and the transverse stiffening ribs is consistent with the thickness of the steel beam flange plate.

[0011] According to an embodiment of the present application, when the beam width is 200 mm, the length of the end of the longitudinal stiffening rib extending beyond the edge of the opening is 100 mm.

[0012] According to an embodiment of the present application, longitudinal stiffening ribs and transverse stiffening ribs are arranged around the opening by welding.

[0013] According to an embodiment of the present application, the steel beam is an H-shaped steel beam.

[0014] According to an embodiment of the present application, the steel beam includes a vertical web, and the upper and lower ends of the web are respectively fixedly connected with horizontally arranged flange plates.

[0015] According to an embodiment of the present application, the distance between the longitudinal stiffening ribs, the transverse stiffening ribs and the edge of the opening is not less than 10 mm.

[0016] According to an embodiment of the present application, the hole is a rectangular hole.

[0017] According to an embodiment of the present application, a composite floor composed of corrugated steel plates and concrete is fixed above the steel beam flange plate.

[0018] According to an embodiment of the present application, the cross section of the steel beam is divided into an upper inverted U-shaped cross section and a lower U-shaped cross section by the web opening.

[0019] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0020] 1. The utility model adopts a technical solution that the total width of the transverse stiffening ribs is 1 / 2 of the beam flange width, the overhanging length of the stiffening ribs is twice the width of the single-sided stiffening ribs, and the thickness of the stiffening ribs is the same as the thickness of the flange. At the same time, the longitudinal stiffening ribs and the transverse stiffening ribs are symmetrically arranged, which not only meets the requirements of the building standards, but also meets the requirement that the plastic limit bending moment Mp is not greater than the maximum bending bearing capacity Mm of the web opening beam, so that the overhanging length of the stiffening ribs is further optimized, and the collision of the stiffening ribs of adjacent openings and the collision of the stiffening ribs with the beam-column connecting bolts are better solved. At the same time, the stiffening ribs are shortened, the steel consumption is reduced, and the construction is convenient.

[0021] 2. The utility model improves the stiffness and bearing capacity of the web opening by welding longitudinal stiffening ribs and transverse stiffening ribs around the web opening for reinforcement, avoids shear damage at the opening corners, has a simple structure, is easy to operate, effectively compensates for the loss of bearing capacity and stiffness caused by opening the opening, improves the bearing capacity and deformation resistance of the web hole composite beam, and has a good transformation prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0023] Figure 1 It is a structural schematic diagram of square hole reinforcement in the prior art.

[0024] Figure 2 A structural schematic diagram of a reinforcement structure for a steel beam web opening according to an example of the utility model;

[0025] Figure 3 for Figure 2 A cross-sectional screenshot taken in the middle AA direction.

[0026] The following are the descriptions of the reference numerals:

[0027] 1. Steel beam, 2. Opening, 3. Transverse stiffening ribs, 4. Longitudinal stiffening ribs. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the patent application specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "an" do not indicate a quantity limitation, but indicate the existence of at least one.

[0030] like Figure 2 , Figure 3 As shown, a reinforcement structure for a hole in the web of a steel beam according to an example of the utility model comprises a hole 2 in the web of a steel beam 1 and transverse stiffening ribs 3 and longitudinal stiffening ribs 4 arranged around the hole 2. The length and thickness of the stiffening ribs are designed in the present application to avoid the problem in the prior art that the stiffening ribs are too long when reinforcing the hole in the web of a heavy steel beam, thereby affecting the beam-column connection, the beam-beam splicing nodes, and the inability to arrange electromechanical pipelines.

[0031] In this embodiment, an opening 2 is opened in the web of the steel beam 1, and transverse stiffening ribs 3 and longitudinal stiffening ribs 4 are arranged around the opening 2; wherein the longitudinal stiffening ribs 4 are located on the upper and lower sides of the opening 2 and are arranged in parallel and symmetrically, and the transverse stiffening ribs 3 are located on the left and right sides of the opening 2, and the two ends of the transverse stiffening ribs 3 are respectively perpendicular to the longitudinal stiffening ribs 4 on the upper and lower sides of the opening 2.

[0032] Specifically, according to the explanation of Article 6.5.2 of the Steel Standard, the maximum bending capacity Mm of the web opening beam with reinforcement is given. When the reinforcement method satisfies the plastic limit bending moment Mp not greater than Mm, the extension length of the stiffening rib can be further optimized. The maximum bending capacity Mm of the web opening beam with reinforcement is calculated according to the following formula:

[0033] When t w e<A r hour:

[0034]

[0035] When t w e≥A r hour:

[0036]

[0037] Where: M p ——Plastic limit bending moment, M p =f y Z(N·mm);

[0038] ΔA s ——Weakened area of ​​web opening, ΔA s =h 0 t w (mm 2 );

[0039] h 0 ——Height of web opening (mm);

[0040] t w ——web thickness (mm);

[0041] ΔA s ——Weakened area of ​​web opening, ΔA s =h 0 t w -2A r ;

[0042] A r ——Cross-sectional area of ​​single-sided stiffening rib on the web.

[0043] Through calculation, when the total width of the stiffening ribs is 1 / 2 of the beam flange width, the extension length of the stiffening ribs is 2 times the width of the single-sided stiffening ribs, the thickness of the stiffening ribs is the same as the flange thickness, and the bilateral symmetrical arrangement can meet the calculation requirements. Therefore, the preferred design in this application is: the length of the end of the longitudinal stiffening rib 4 extending beyond the edge of the opening 2 is 2 times the width of the single-sided stiffening rib, the width of the longitudinal stiffening rib 4 is 1 / 2 of the beam flange width, and the thickness of the transverse stiffening ribs 3 and transverse stiffening ribs 4 is consistent with the thickness of the flange plate of the steel beam 1. Such optimization better solves the problems of collision between the stiffening ribs of adjacent openings 2 and collision between the stiffening ribs and the beam-column connection bolts.

[0044] Furthermore, when the beam width is 200 mm, the length of the end of the longitudinal stiffening rib 4 extending beyond the edge of the opening 2 can be 100 mm. Figure 2 The extension length of the stiffening ribs was optimized from 300mm to 100mm, which effectively solved the problems of collision between the stiffening ribs of adjacent openings 2 and collision between the stiffening ribs and beam-column connecting bolts.

[0045] Furthermore, longitudinal stiffening ribs 4 and transverse stiffening ribs 3 are arranged around the opening 2 by welding, and the net distance between the stiffening ribs and the edge of the web opening 2 should not be less than 10 mm to meet the requirements of the weld, and the longitudinal stiffening ribs 3 do not protrude from the left and right edges of the web opening 2, saving materials.

[0046] Furthermore, the steel beam 1 is an H-shaped steel beam, and the web opening 2 is generally a rectangular opening with rounded corners, such as Figure 3 As shown, the cross section of the steel beam 1 is divided into an upper inverted U-shaped cross section and a lower U-shaped cross section by the web opening 2. Among them, the height of the web opening 2 should not exceed half of the height of the steel beam 1, the height of the upper inverted U-shaped cross section and the lower U-shaped cross section should not be less than one-fourth of the height of the steel beam 1, and the length of the opening 2 should not exceed 2.5 times the height of the web opening 2.

[0047] Furthermore, the beam includes a vertical web, and the upper and lower ends of the web are respectively fixedly connected with horizontally arranged flange plates.

[0048] Furthermore, the opening 2 is a rectangular opening.

[0049] Furthermore, a composite floor composed of corrugated steel plate and concrete is fixed above the flange plate of the steel beam 1.

[0050] A method for implementing a reinforcement structure of a steel beam web opening according to an embodiment of the utility model comprises the following steps:

[0051] S201: Opening 2 is made in the web of steel beam 1;

[0052] S202: longitudinal stiffening ribs 3 and transverse stiffening ribs 4 are welded around the opening 2 of the web of the steel beam 1;

[0053] S203: placing a corrugated steel plate on the upper flange of the steel beam 1, and welding studs through the corrugated steel plate;

[0054] S204: Tie steel bars;

[0055] S205: Concrete is poured and cured, and component production is completed.

[0056] In summary, the technical solution of this application has the following beneficial effects:

[0057] 1. The utility model adopts a technical solution that the total width of the transverse stiffening ribs is 1 / 2 of the beam flange width, the overhanging length of the stiffening ribs is twice the width of the single-sided stiffening ribs, and the thickness of the stiffening ribs is the same as the thickness of the flange. At the same time, the longitudinal stiffening ribs and the transverse stiffening ribs are symmetrically arranged, which not only meets the requirements of the building standards, but also meets the requirement that the plastic limit bending moment Mp is not greater than the maximum bending bearing capacity Mm of the web opening beam, so that the overhanging length of the stiffening ribs is further optimized, and the collision of the stiffening ribs of adjacent openings and the collision of the stiffening ribs with the beam-column connecting bolts are better solved. At the same time, the stiffening ribs are shortened, the steel consumption is reduced, and the construction is convenient.

[0058] 2. The utility model improves the stiffness and bearing capacity of the web opening by welding longitudinal stiffening ribs and transverse stiffening ribs around the web opening for reinforcement, avoids shear damage at the opening corners, has a simple structure, is easy to operate, effectively compensates for the loss of bearing capacity and stiffness caused by opening the opening, improves the bearing capacity and deformation resistance of the web hole composite beam, and has a good transformation prospect.

[0059] The above are merely exemplary embodiments of the present application and are not intended to limit the protection scope of the present application. The protection scope of the present application is determined by the appended claims.

Claims

1. A reinforcement structure for a steel beam web opening, characterized in that: include: An opening is opened in the web of the steel beam, and longitudinal stiffening ribs and transverse stiffening ribs are arranged around the opening; Wherein, the longitudinal stiffening ribs are located on the upper and lower sides of the hole and are arranged in parallel and symmetrically, the transverse stiffening ribs are located on the left and right sides of the hole, and the two ends of the transverse stiffening ribs are respectively perpendicular to the longitudinal stiffening ribs on the upper and lower sides of the hole; The length of the end of the transverse stiffening rib extending beyond the edge of the opening is twice the width of the single-sided stiffening rib, and the total width of the transverse stiffening rib is 1 / 2 of the beam flange width; The thickness of the longitudinal stiffening ribs and the transverse stiffening ribs is consistent with the thickness of the steel beam flange plate.

2. A reinforcement structure for a steel beam web opening according to claim 1, characterized in that: When the beam width is 200 mm, the length of the end of the longitudinal stiffening rib extending beyond the edge of the opening is 100 mm.

3. A reinforcement structure for a steel beam web opening according to claim 1, characterized in that: The longitudinal stiffening ribs and the transverse stiffening ribs are arranged around the opening by welding.

4. A reinforcement structure for a steel beam web opening according to claim 1, characterized in that: The steel beam is an H-shaped steel beam.

5. The reinforcement structure of a steel beam web opening according to claim 1, characterized in that: The steel beam comprises a vertical web, and the upper and lower ends of the web are respectively fixedly connected with horizontally arranged flange plates.

6. A reinforcement structure for a steel beam web opening according to claim 1, characterized in that: The distance between the longitudinal stiffening ribs, the transverse stiffening ribs and the edge of the opening is not less than 10 mm.

7. A reinforcement structure for a steel beam web opening according to claim 1, characterized in that: The hole is a rectangular hole.

8. The reinforcement structure of a steel beam web opening according to claim 1, characterized in that: A composite floor composed of corrugated steel plates and concrete is fixed above the steel beam flange plates.

9. The reinforcement structure of a steel beam web opening according to claim 1, characterized in that: The steel beam cross section is divided into an upper inverted U-shaped cross section and a lower U-shaped cross section by the web opening.

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