Anti-seismic energy-dissipation steel beam capable of being rapidly repaired after earthquake

Abstract

The utility model discloses an anti-seismic energy-dissipation steel beam capable of being rapidly repaired after an earthquake, and relates to the technical field of structural engineering and structural seismic resistance. According to the design principle of strong joints, weak components, strong columns and weak beams, an energy-dissipation beam section is arranged between a column end steel beam and a steel beam and is also called a weakening section; according to the energy dissipation beam section, damage generated by an earthquake is concentrated in the section so as to preserve the structures at the two ends of the section, the energy dissipation beam section is simple in structure and easy to replace, when the section is damaged, the section can be cut off along the cutting line, and then a new weakening section is welded again along the cutting line so as to achieve rapid repairing work after the earthquake.

Description

Technical Field

[0001] The utility model belongs to the technical field of structural engineering and structural earthquake resistance, and particularly relates to a steel beam which is earthquake-resistant and energy-dissipating and can be quickly repaired after an earthquake. Background Art

[0002] In recent years, rapid recovery of post-earthquake functions has become a research hotspot and frontier in the field of earthquake engineering. Structures that can rapidly recover post-earthquake functions are an important foundation for realizing rapid recovery of urban and social functions after earthquakes, that is, structures that do not need to be repaired or can be restored to their functional use with only a little repair after an earthquake. Compared with the existing assembled energy-consuming sections connected by bolts, this patent has a simple structure and uses less steel, while ensuring energy consumption and replaceability. In combination with mature intelligent processing equipment on the current market, it can further achieve construction convenience and lower overall costs.

[0003] In order to solve the current problems, it is necessary to set up a transition section for energy absorption between the steel column and the steel beam - the energy absorption beam section. The energy absorption beam section is often used to connect the steel column and the steel beam. Therefore, the energy absorption beam section is also the key to ensure that the post-earthquake function can be quickly replaced and repaired. When a large earthquake or a rare earthquake occurs, the energy absorption beam section will first yield and dissipate energy, that is, the force will be concentrated on this section, causing it to yield or crack until it is destroyed. The section will be abandoned to preserve the structures on both sides of the section. When the earthquake is over, the damaged energy absorption beam section will be cut off and then the new energy absorption beam section will be reconnected to achieve rapid post-earthquake repair. Utility Model Content

[0004] The purpose of the utility model is to provide a steel beam that is earthquake-resistant and energy-absorbing and can be quickly repaired after an earthquake. Specifically, a section of energy-absorbing beam (also called a weakened section) is introduced to concentrate the damage in the section, and the section is abandoned to preserve the structures on both sides of the section. When the earthquake is over, the damaged energy-absorbing beam section is cut off and then a new energy-absorbing beam section is reconnected to achieve rapid post-earthquake repair. The specific technical solution is as follows:

[0005] A steel beam that resists earthquakes and dissipates energy and can be quickly repaired after an earthquake, comprising a steel column and a steel beam section;

[0006] The steel beam section includes an upper flange, a lower flange and a steel plate web, the upper flange is parallel to the lower flange, the steel plate web connects the upper flange and the lower flange, and the steel plate web is perpendicular to the upper flange and the lower flange, and is perpendicular to the upper flange and the lower flange respectively;

[0007] The steel beam section includes a steel beam, a column end steel beam and an energy absorption beam section, the column end steel beam is arranged on the steel column, the column end steel beam, the energy absorption beam section and the steel beam are arranged in sequence in the same straight line, and the energy absorption beam section is used to connect the column end steel beam and the steel beam;

[0008] A damage concentration area is provided on the energy-absorbing beam section.

[0009] Preferably, the energy-absorbing beam section is arranged within a range of 1-2 times of the beam height length from the edge of the steel column.

[0010] Preferably, a plurality of vertical stiffening ribs are welded on both sides of the energy-absorbing beam section, and three consecutive adjacent sides of the vertical stiffening ribs are respectively welded to the side surface of the steel plate web, the bottom surface of the upper flange and the upper surface of the lower flange.

[0011] Preferably, four vertical stiffening ribs are provided, two of which are provided on each side of the steel plate web, the vertical stiffening ribs are symmetrically arranged on both sides of the steel plate web, the vertical stiffening ribs are respectively arranged at opposite ends of the energy-absorbing beam section, and a damaged portion is formed between two adjacent vertical stiffening ribs.

[0012] Preferably, the damage concentration area is arranged on the damaged portion and is located on both sides of the lower flange.

[0013] Preferably, the damage concentration area is recessed toward the web of the steel plate.

[0014] Preferably, when the energy-absorbing beam section is destroyed, a cutting line and a welding line are provided between the damage concentration area and the vertical stiffening rib, the upper cutting line and the welding line of the cutting line and the welding line are lower than the bottom surface of the upper flange, and the cutting line and the welding line are located between the vertical stiffening rib and the damage concentration area.

[0015] Compared with the existing technology, the utility model has the following beneficial effects:

[0016] 1. The utility model provides a steel beam that is earthquake-resistant and energy-absorbing and can be quickly repaired after an earthquake. The structure specifically introduces a section of energy-absorbing beam (also called a weakened section) to concentrate the damage in the section, and the section is abandoned to preserve the structures on both sides of the section. After the earthquake is over, the damaged energy-absorbing beam section is cut off and then a new energy-absorbing beam section is reconnected to achieve rapid post-earthquake repair.

[0017] 2. In the present invention, a damage concentration zone is set in the energy-absorbing beam section. When a large earthquake or a rare earthquake occurs, the energy-absorbing beam section first yields and consumes energy (i.e., the yield energy is concentrated in the damage concentration zone of the energy-absorbing beam section). When it is finally destroyed, the weak section of the energy-absorbing beam section is severely buckled or cracked. At this time, due to the separation and reinforcement of the vertical stiffening ribs, the steel beam flanges on both sides of the energy-absorbing beam section remain intact, and other parts of the node remain in an elastic state.

[0018] 3. The energy-absorbing beam section in the present invention has a simple structure and is easy to replace. The destructive force in an earthquake is absorbed in this section. When this section is damaged, it can be cut off along the cutting line, and then a new energy-absorbing beam section can be re-welded along the cutting line to achieve rapid post-earthquake repair work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

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

[0021] Figure 2 It is a cutaway diagram of the overall structure of the utility model.

[0022] Figure 3 It is a front view of the overall structure of the utility model.

[0023] Description of main reference numerals:

[0024] 1- steel column, 2- steel beam, 3- energy absorption beam section, 4- steel beam web, 5- vertical stiffening rib, 6- damage concentration area, 7- cutting line and welding line, 8- steel beam at column end, 9- upper flange, 10- lower flange. 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] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" 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 cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure. Example

[0029] like Figures 1 to 3 As shown, a steel beam that is earthquake-resistant and energy-dissipating and can be quickly repaired after an earthquake. At present, the beam-column nodes of steel structure frames mainly bear the axial force, bending moment and shear force under the vertical load and earthquake load. The traditional steel frame beam-column nodes are connected by full welding or bolt-welding mixed connection methods, but this type of steel frame does not have the ability to achieve superior earthquake resistance. In addition, when encountering an earthquake, a large number of brittle failures occur in the welds at the beam-column nodes, which makes the steel frame basically lose its bearing capacity and causes huge losses. After that, scholars conducted a large number of experiments and studies on the steel frame beam-column nodes. Finally, according to the design principle of "strong nodes and weak components, strong columns and weak beams", a steel beam structure is developed to control the reasonable damage between the steel column-floor steel beam node (that is, to concentrate the damage in a certain replaceable segment) to achieve rapid repair and rapid restoration of its function after an earthquake. The structure specifically includes a steel column 1 and a steel beam segment;

[0030] The steel beam section structure includes an upper flange 9, a lower flange 10 and a steel plate web 4. The steel beam section structure is an "I"-shaped structure. The upper flange 9 is parallel to the lower flange 10. The steel plate web 4 connects the upper flange 9 and the lower flange 10. The steel plate web 4 is perpendicular to the upper flange 9 and the lower flange 10, and is perpendicular to the upper flange 9 and the lower flange 10 respectively.

[0031] Furthermore, the steel beam section is divided into a steel beam 2, a column end steel beam 8 and an energy absorbing beam section 3. The column end steel beam 8 is arranged on the steel column 1. It can be assumed that the column end steel beam 8 and the steel column 1 are an integral structure. The column end steel beam 8, the energy absorbing beam section 3 and the steel beam 2 are arranged in sequence in the same straight line, and the energy absorbing beam section 3 is used to connect the column end steel beam 8 and the steel beam 2. The energy absorbing beam section 3 is also called a weakening section, that is, the damage of the earthquake is concentrated in this section to preserve the structures at both ends of this section.

[0032] In the present invention, a damage concentration area 6 is provided on the energy-absorbing beam section 3 .

[0033] In the present invention, the energy-absorbing beam section 3 is arranged within a range of 1-2 times the beam height from the edge of the steel column 1, ensuring that the length of the column end steel beam 8 extending from the steel column 1 is within a suitable length range to ensure its stable bearing capacity. The purpose is also to avoid the energy-absorbing beam section 3 being directly connected to the column body of the steel column 1. The flange-weakened node-type setting method can effectively prevent the steel beam from undergoing lateral torsional buckling.

[0034] In the present invention, a plurality of vertical stiffening ribs 5 are welded on both sides of the energy absorbing beam section 3. The three consecutive adjacent sides of the vertical stiffening ribs 5 are respectively welded to the side surface of the steel plate web 4, the bottom surface of the upper flange 9 and the upper surface of the lower flange 10. Specifically, four vertical stiffening ribs 5 are welded, and two vertical stiffening ribs 5 are arranged on each side of the steel plate web 4. The vertical stiffening ribs 5 are symmetrically arranged on both sides of the steel plate web 4. The vertical stiffening ribs 5 are respectively arranged at opposite ends of the energy absorbing beam section (3), and a damaged portion is formed between two adjacent vertical stiffening ribs 5.

[0035] The damage concentration area 6 is arranged on the damaged part and is located on both sides of the lower flange 10. The damage concentration area 6 is used to concentrate energy consumption to reduce the damage suffered by the building in an earthquake, so that when a large earthquake or a rare earthquake occurs, the energy-absorbing beam section 3 first yields and consumes energy (that is, the yield energy consumption is concentrated on the energy-absorbing beam section 3). When it is finally destroyed, the nodes are mainly concentrated in the weak section of the energy-absorbing beam section 3 to cause severe buckling or cracking. At this time, due to the separation and reinforcement of the vertical stiffening ribs 5, the steel beam flanges on both sides of the energy-absorbing beam section 3 remain intact, and other parts of the node remain in an elastic state.

[0036] Specifically, the damage concentration area 6 is recessed toward the steel plate web 4 .

[0037] When the energy-absorbing beam section 3 is damaged, a cutting line and a welding line 7 (the welding line and the cutting line are the same line here) are provided between the damage concentration area 6 and the vertical stiffening rib 5. The upper cutting line and the welding line of the cutting line and the welding line 7 are lower than the bottom surface of the upper flange 9. The purpose is to damage the floor concrete layer of the upper part of the steel beam section during the cutting process and only cut the damaged part. The cutting line and the welding line 7 are located between the vertical stiffening rib 5 and the damage concentration area 6. The size of the cut-off part is measured, and a new replacement section is made as a replacement. The size of the new replacement section is the same as the size of the cut-off damaged structure. The new replacement section is welded to the missing area. After welding is completed, a new steel beam section is re-formed to complete the post-earthquake building repair work.

[0038] In summary, the utility model provides a steel beam that is earthquake-resistant and energy-absorbing and can be quickly repaired after an earthquake. The structure specifically introduces a section of energy-absorbing beam (also called a weakened section), concentrates the damage in the section, and abandons the section to preserve the structures on both sides of the section. When the earthquake is over, the damaged energy-absorbing beam section is cut off and then a new energy-absorbing beam section is reconnected to achieve rapid post-earthquake repair. In the utility model, a damage concentration area is set in the energy-absorbing beam section, and the damage concentration area is concave toward the inner side of the energy-absorbing beam section, and the shape is an isosceles trapezoidal structure, so that when a large earthquake or a rare earthquake occurs, the energy-absorbing beam section is first damaged. Yield energy consumption occurs (i.e., the yield energy consumption is concentrated in the damage concentration area of ​​the energy-absorbing beam section). When the energy-absorbing beam section is finally destroyed, the weak section of the energy-absorbing beam section is severely buckled or cracked. At this time, due to the separation and reinforcement of the vertical stiffening ribs, the steel beam flanges on both sides of the energy-absorbing beam section remain intact, and other parts of the node remain in an elastic state. The energy-absorbing beam section in the utility model has a simple structure and is easy to replace. The destructive force in the earthquake is absorbed in this section. When the section is damaged, the section can be cut off along the cutting line, and then a new energy-absorbing beam section can be re-welded along the cutting line to realize the work of rapid repair after the earthquake.

[0039] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A steel beam that is earthquake-resistant and energy-dissipating and can be quickly repaired after an earthquake, characterized in that: comprising a steel column (1) and a steel beam segment; The steel beam section comprises an upper flange (9), a lower flange (10) and a steel plate web (4), wherein the upper flange (9) is parallel to the lower flange (10), the steel plate web (4) connects the upper flange (9) and the lower flange (10), and the steel plate web (4) is perpendicular to the upper flange (9) and the lower flange (10), and is perpendicular to the upper flange (9) and the lower flange (10); The steel beam section comprises a steel beam (2), a column end steel beam (8) and an energy absorbing beam section (3); the column end steel beam (8) is arranged on the steel column (1); the column end steel beam (8), the energy absorbing beam section (3) and the steel beam (2) are arranged in sequence in a straight line; and the energy absorbing beam section (3) is used to connect the column end steel beam (8) and the steel beam (2); The energy-absorbing beam section (3) is provided with a damage concentration area (6); A plurality of vertical stiffening ribs (5) are welded on both sides of the energy-absorbing beam section (3), and three consecutive adjacent side edges of the vertical stiffening ribs (5) are respectively welded to the side surface of the steel plate web (4), the bottom surface of the upper flange (9) and the upper surface of the lower flange (10); Four vertical stiffening ribs (5) are provided, two vertical stiffening ribs (5) are provided on each side of the steel plate web (4), the vertical stiffening ribs (5) are symmetrically arranged on both sides of the steel plate web (4), the vertical stiffening ribs (5) are respectively arranged at opposite ends of the energy absorbing beam section (3), and a damaged portion is formed between two adjacent vertical stiffening ribs (5); The damage concentration area (6) is arranged on the damaged portion and is located on both sides of the lower flange (10); When the energy-absorbing beam section (3) is damaged, a cutting line and a welding line (7) are provided between the damage concentration area (6) and the vertical stiffening rib (5), the upper cutting line and the welding line of the cutting line and the welding line (7) being lower than the bottom surface of the upper flange (9), and the cutting line and the welding line (7) being located between the vertical stiffening rib (5) and the damage concentration area (6).

2. The steel beam according to claim 1 that is earthquake-resistant and energy-absorbing and can be quickly repaired after an earthquake, characterized in that: The energy-absorbing beam section (3) is arranged within a range of 1 to 2 times the beam height length from the edge of the steel column (1).

3. The steel beam according to claim 1 that is earthquake-resistant and energy-absorbing and can be quickly repaired after an earthquake, characterized in that: The damage concentration area (6) is recessed towards the steel plate web (4).

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