CN211037283U - Prefabricated steel beam-column joint system with built-in removable energy dissipation elements - Google Patents

Abstract

The utility model relates to a prefabricated assembly steel structure beam column node system of built-in detachable power consumption component, including steel column (1), girder steel (2), power consumption component (3), this power consumption component (3) include integrated into one piece's component horizontal part (31), connecting portion (32) and component vertical part (33), wherein, component horizontal part (31) and component vertical part (33) are mutually perpendicular; the steel beam (2) is hinged with the steel column (1), the vertical part (33) of the element is hinged with the steel beam (2), and the transverse part (31) of the element is rigidly connected with the steel column (1). Compared with the prior art, the utility model has the advantages of reduce or eliminate on-the-spot welding work load, ensure that the engineering quality is reliable, improve the prefabricated assembly degree of steel construction, satisfy the antidetonation power consumption requirement of steel construction, conveniently shake back structure reinforcement and restoration.

Description

Prefabricated steel beam-column joint system with built-in removable energy dissipation elements

technical field

The utility model relates to the field of seismic energy dissipation design of prefabricated building steel structure beam-column joints, in particular to a prefabricated assembled steel structure beam-column joint system with built-in detachable energy dissipation elements.

Background technique

The steel structure naturally has the characteristics of prefabrication, and the installation speed is fast, and it has been widely used in multi-high-rise industrial plants, residential, commercial, office and structures and other projects. At present, there are still many on-site welding and high-altitude dangerous operations in the installation of steel structures, resulting in poor quality of steel structure projects and pollution to the environment. With the vigorous promotion and application of new technologies of the overall prefabricated concrete structure in my country, although the main body of the steel structure can still have the advantages of light weight and good ductility, the advantages of its assembly are gradually reduced. In order to further promote the technological development and popularization and application of fabricated steel structures in my country and the national policy of eliminating steel production capacity, the beam-column joints of fabricated steel structures will become a key part of fabricated steel structures, and their assembly degree and seismic performance will directly affect the overall structure. . Seeking a way to change the stress mode and energy dissipation mode of traditional joints, to satisfy the safety of beam-column joint itself and the overall structure, and to have better seismic performance, this kind of beam-column joint is bound to be a better way. The utility model is developed based on this idea.

With the deteriorating global climate, the world's requirements for the environment are becoming more and more stringent, and the fabricated steel structure conforms to the construction method in this form, which has been vigorously promoted by developed countries for many years. Most of the components in the fabricated steel structure are processed in the factory, but the installation of the joints has not been fully industrialized, and the seismic safety performance of the joints still has some shortcomings, such as the all-welded beam-column joints are easily brittle under the action of strong earthquakes.

Utility model content

The purpose of this utility model is to provide a method to reduce or eliminate the on-site welding workload in order to overcome the defects of the above-mentioned prior art, ensure reliable engineering quality, improve the prefabrication and assembly degree of the steel structure, and meet the seismic energy consumption requirements of the steel structure. A prefabricated steel beam-column joint system with built-in detachable energy-dissipating elements that facilitates post-earthquake structural reinforcement and repair.

The purpose of the present utility model can be achieved through the following technical solutions:

A prefabricated and assembled steel beam-column joint system with built-in detachable energy-dissipating elements includes steel columns, steel beams, and energy-dissipating elements. , the transverse part of the element and the vertical part of the element are perpendicular to each other; the steel beam is hinged with the steel column, the vertical part of the element is hinged with the steel beam, and the transverse part of the element is rigidly connected with the steel column. When the system encounters frequent earthquakes, it is in the elastic stage, and the energy dissipation elements form an organic whole with steel beams and steel columns, providing lateral and vertical stiffness, jointly bearing horizontal and vertical loads, and the maximum stress is located in the energy dissipation elements; When the earthquake acts, the energy-dissipating element begins to enter the plastic stage. With the continuous increase of the horizontal seismic action, the energy-dissipating element takes the lead to form a plastic hinge and dissipate the seismic energy until the failure occurs, and the steel beam and steel column are always in the elastic stage without yielding or Damage: After the system is subjected to earthquake action, the energy-consuming components can be easily disassembled and replaced with the same or equivalent energy-consuming components, so that the system can be restored to the same initial stress level. The system is easy to install, has a high degree of prefabrication and assembly, and has fast construction speed; less on-site welding work and reliable quality.

Further, the connecting portion is an inclined rod and forms an included angle of 40-50° with the vertical portion of the element, or the connecting portion is arc-shaped.

Further, the ratio of the linear stiffness of the energy dissipation element to the linear stiffness of the steel beam, namely EI _dg /L _dg : EI _b /L _b =0.3-0.6. The ratio of the transverse span of the energy dissipation element to the span of the steel beam is L _dg /L _b =0.18-0.30. At this time, the strength, stiffness, ductility and seismic performance of the joint system can be equal to or higher than that of the rigid beam-column joint of the ordinary steel frame, and with the increase of the height H _dg of the energy dissipation element, the strength, stiffness, ductility and Better shock resistance.

Further, the steel column is provided with a stiffening plate, a part of the stiffening plate protrudes from the steel column, and the protruding part of the stiffening plate is connected with the steel beam.

Further, bolt holes are provided on the protruding part of the stiffening plate, matching bolt holes are provided on the steel beam, and high-strength bolts are used to connect the protruding part of the stiffening plate with the steel beam, so that the steel beam is The beams are hinged to the steel columns.

Further, the steel beam is provided with a steel beam stiffening plate, a part of the steel beam stiffening plate extends out of the steel beam, and the protruding part of the steel beam stiffening plate is connected with the vertical part of the element.

Further, bolt holes are provided on the protruding part of the steel beam stiffening plate, and matching bolt holes are provided on the vertical part of the element, and high-strength bolts are used to connect the protruding part of the steel beam stiffening plate to the element. The vertical part is connected to form a hinged connection between the vertical part of the element and the steel beam.

Further, the steel column is also provided with a steel column stiffening plate, the end of the steel column stiffening plate is provided with a steel column end plate, the end of the horizontal part of the element is provided with an element end plate, and the element The end plates are connected to the steel column end plates.

Further, the steel column end plate is provided with bolt holes, and the steel column end plate and the steel column stiffening plate are connected by a piece of H-shaped steel; the element end plate is provided with matching bolt holes, and high-strength bolts are used to fasten the steel column. The end plate is connected with the end plate of the element, so that the transverse part of the element forms a rigid connection with the steel column.

The connection between the steel beam and the steel column, the energy-consuming element and the steel beam, and the energy-consuming element and the steel column are all connected by high-strength bolts. There is no welding workload on site, and the quality is controllable, which is conducive to environmental protection; the construction operation is simple and convenient, The construction speed is fast, the prefabricated assembly degree is high, and the labor cost is greatly saved. The dissipative elements are removable. After the node system is subjected to earthquake action, the energy-consuming components can be replaced to meet the functional requirements of the original design. The repair is convenient, the construction speed is fast, and the reinforcement and maintenance cost is low.

By adding different energy dissipating elements to the nodes of different forms of connections, such as hinged, semi-rigid and rigid connections in the fabricated steel structure, the beam-column connections of hinged and semi-rigid connections are equal to or surpass the strength and performance of rigid connections. Seismic performance, rigidly connected beam-column joints have better ductility, the industrialization of steel structures is greatly improved, and environmental pollution is greatly reduced. Therefore, the utility model of the prefabricated steel structure beam-column joint system with built-in detachable energy-dissipating elements has far-reaching significance.

In order to achieve the above purpose, first of all, high-strength bolts are used between the steel beam and the steel column, the energy dissipation element and the steel beam, and the energy dissipation element and the steel column. The energy element is completely detachable, avoiding the welding connection method on site; secondly, the energy dissipation method in which the energy dissipation element forms a plastic hinge, realizes the mode in which the main components of the steel beam and the steel column do not yield and fail, and realizes the repairability of the post-earthquake structure. And the feasibility of recycling; thirdly, by controlling the related parameters such as the linear stiffness and spatial position of the energy-consuming components, the maximum efficiency controllability of the energy-consuming components is achieved.

Compared with the prior art, the utility model has the following advantages:

(1) There is no on-site welding, which reduces the manual workload of high-altitude welding, saves labor costs, and is conducive to environmental protection;

(2) The installation and disassembly are convenient, the construction speed of construction and repair after damage is fast, and the maintenance cost is greatly reduced;

(3) The energy consumption pattern of the energy-consuming elements is excellent, the main components of the beam and column of the system do not yield or fail, the value of recycling is higher, and the post-earthquake repair is convenient;

(4) The prefabricated steel beam-column joint system equipped with detachable energy-consuming elements, under certain conditions, its strength, stiffness and seismic performance are equal to or higher than the rigid beam-column joints of traditional steel frame structures;

(5) The influence of energy-consuming components on the building space is reduced.

Description of drawings

Figure 1 is an elevation view of the node system;

Figure 2 is a detailed view of the connection between the steel beam and the steel column;

Figure 3 is a detailed view of the connection between the energy dissipation element and the steel beam;

Figure 3a is a sectional view of 1-1;

Figure 4 is a detailed view of the connection between the energy dissipation element and the steel column;

Figure 4a is a sectional view of 2-2;

The numbers in the figure show: steel column 1, steel column stiffening plate 11, steel column end plate 111, stiffening plate 12, steel beam 2, steel beam stiffening plate 21, energy dissipation element 3, element cross section 31, element end plate 311 , connecting part 32 , component vertical part 33 .

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example

A prefabricated assembled steel beam-column joint system with built-in detachable energy-dissipating elements, as shown in Figure 1, includes a steel column 1, a steel beam 2, and an energy-dissipating element 3. The energy-dissipating element 3 includes an integrally formed The element transverse part 31, the connecting part 32 and the element vertical part 33, wherein the element transverse part 31 and the element vertical part 33 are perpendicular to each other; Column 1 is just connected. At this time, the connecting portion 32 is an inclined rod and forms an included angle of 40-50° with the vertical portion 33 of the element. The ratio of the linear stiffness of the energy dissipation element 3 to the linear stiffness of the steel beam 2 is EI _dg /L _dg : EI _b /L _b =0.3-0.6. The ratio of the transverse span of the energy dissipation element 3 to the span of the steel beam 2 is L _dg /L _b =0.18-0.30.

Steel column 1 includes steel column section steel, stiffening plate 12 and steel column stiffening plate 11, a part of stiffening plate 12 extends out of steel column 1, and is provided with bolt holes in the projecting part, and steel beam 2 includes steel beam section section steel and steel column. Beam stiffening plate 21, a part of the steel beam stiffening plate 21 protrudes from the steel beam 2, and is provided with bolt holes in the protruding part; the end of the steel column stiffening plate 11 is provided with a steel column end plate 111, and the end plate of the steel column is provided with a steel column end plate 111. Bolt holes are provided on the 111, and the steel column end plate 111 and the steel column stiffening plate 11 are connected by a piece of H-shaped steel;

As shown in FIGS. 3 and 3 a , the hinged connection between the energy dissipation element 3 and the steel beam 2 specifically refers to using high-strength bolts to connect the protruding part of the steel beam stiffening plate 21 with the element vertical part 33 .

As shown in FIG. 2 , the hinged connection between the steel beam 2 and the steel column 1 specifically refers to using high-strength bolts to connect the protruding part of the stiffening plate 12 with the steel beam section.

As shown in FIG. 4 and FIG. 4a , the rigid connection between the energy dissipation element 3 and the steel column 1 specifically refers to the use of high-strength bolts to connect the element end plate 311 provided on the transverse part 31 of the element with the steel column end plate provided on the steel column stiffening plate 11 Board 111 is connected.

In terms of specific processing, the steel column 1, the steel beam 2 and the energy-consuming element 3 are respectively set out according to the design requirements, and are prefabricated in the factory. After the factory processing is completed, it is transported to the site, the steel column 1 is hoisted and placed in place according to the location of the site, temporary support is set, the energy-consuming element 3 is connected to the steel column 1 through high-strength bolts, and then the steel beams 2 are separated by high-strength bolts. The steel column 1 and the energy dissipating element 3 are connected in place, so far, a prefabricated and assembled steel structure beam-column joint system equipped with a detachable energy dissipating element 3 is completed.

The above description of the implementation is for the convenience of those of ordinary skill in the art to understand and use the present invention. Those skilled in the art can readily make appropriate modifications to these implementations and apply the general principles described herein to other implementations without inventive step. Therefore, the present invention is not limited to the above-mentioned implementation, and improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should all fall within the protection scope of the present invention.

Claims (10)

1. A prefabricated steel structure beam-column joint system with a built-in detachable energy-consuming element, comprising a steel column (1), a steel beam (2), characterized in that the system further comprises an energy-consuming element (3), the The energy dissipation element (3) comprises an integrally formed element transverse portion (31), a connecting portion (32) and an element vertical portion (33), wherein the element transverse portion (31) and the element vertical portion (33) are perpendicular to each other; the The steel beam (2) is hinged with the steel column (1), the vertical part (33) of the element is hinged with the steel beam (2), and the transverse part (31) of the element is rigidly connected with the steel column (1). 2. A prefabricated assembled steel structure beam-column joint system with built-in detachable energy-dissipating elements according to claim 1, characterized in that the linear stiffness of the energy-dissipating elements (3) is the same as that of the steel beam (2) The ratio of the linear stiffness of , namely EI _dg /L _dg : EI _b /L _b =0.3-0.6. 3. A prefabricated assembled steel structure beam-column joint system with built-in detachable energy-dissipating elements according to claim 1, characterized in that the transverse span of the energy-dissipating element (3) is the same as that of the steel beam (2) The ratio of the spans, namely L _dg /L _b =0.18-0.30. 4. A prefabricated assembled steel structure beam-column joint system with a built-in detachable energy-dissipating element according to claim 1, wherein the connecting portion (32) is an oblique rod, and is connected with the element vertical portion (32). 33) The included angle is 40-50°, or the connecting portion (32) is arc-shaped. 5. A prefabricated steel structure beam-column joint system with built-in detachable energy-dissipating elements according to claim 1, wherein the steel column (1) is provided with a stiffening plate (12), the A part of the stiffening plate (12) protrudes out of the steel column (1), and the protruding part of the stiffening plate (12) is connected with the steel beam (2). 6. A prefabricated steel structure beam-column joint system with built-in detachable energy dissipation elements according to claim 5, characterized in that, bolt holes are provided on the protruding part of the stiffening plate (12), The steel beam (2) is provided with matching bolt holes, and high-strength bolts are used to connect the protruding part of the stiffening plate (12) with the steel beam (2), so that the steel beam (2) is connected to the steel column (1) form a hinge. 7. A prefabricated assembled steel structure beam-column joint system with built-in detachable energy-dissipating elements according to claim 1, wherein the steel beam (2) is provided with a steel beam stiffening plate (21) A part of the steel beam stiffening plate (21) protrudes from the steel beam (2), and the protruding part of the steel beam stiffening plate (21) is connected with the element vertical part (33). 8. A prefabricated steel structure beam-column joint system with built-in detachable energy dissipation elements according to claim 7, characterized in that, bolts are provided on the protruding part of the steel beam stiffening plate (21) The element vertical part (33) is provided with matching bolt holes, and high-strength bolts are used to connect the protruding part of the steel beam stiffening plate (21) with the element vertical part (33), so that the element vertical part (33) ) is hinged with the steel beam (2). 9. A prefabricated assembled steel structure beam-column joint system with built-in detachable energy-dissipating elements according to claim 1, wherein the steel column (1) is further provided with a steel column stiffening plate (11). ), the end of the steel column stiffening plate (11) is provided with a steel column end plate (111), the end of the element transverse portion (31) is provided with an element end plate (311), and the element end plate ( 311) is connected with the steel column end plate (111). 10. A prefabricated steel structure beam-column joint system with built-in detachable energy dissipation elements according to claim 9, characterized in that the steel column end plate (111) is provided with bolt holes, and the steel column is provided with bolt holes. The end plate (111) and the steel column stiffening plate (11) are connected by a piece of H-beam; the element end plate (311) is provided with matching bolt holes, and high-strength bolts are used to connect the steel column end plate (111) and the element end plate ( 311) connection, so that the transverse part (31) of the element and the steel column (1) form a rigid connection.

Images