CN111608457A - Steel frame with friction energy dissipation self-resetting device in beam - Google Patents
Steel frame with friction energy dissipation self-resetting device in beam Download PDFInfo
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- CN111608457A CN111608457A CN202010402829.XA CN202010402829A CN111608457A CN 111608457 A CN111608457 A CN 111608457A CN 202010402829 A CN202010402829 A CN 202010402829A CN 111608457 A CN111608457 A CN 111608457A
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- plate
- steel
- frame
- backing plate
- energy dissipation
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/024—Structures with steel columns and beams
Abstract
The invention discloses a steel frame with a friction energy-consumption self-resetting device in a beam, which comprises at least one structural unit, wherein the structural unit comprises a frame column, an I-shaped steel beam, a through long steel plate, an upper backing plate, a lower backing plate, a high-strength bolt and a butterfly gasket, two ends of the I-shaped steel beam are connected with the frame column through flange plates, two ends of the through long steel plate are respectively welded with the frame column, the upper backing plate is welded on the outer side of the I-shaped steel beam, the lower backing plate is positioned on the lower side of the through long steel plate, the high-strength bolt is used for connecting the I-shaped steel beam, the through long steel plate, the upper backing plate and the lower backing plate into a whole, slopes are arranged on two sides of a connecting surface. After the invention is applied to the steel frame, the structure can simultaneously realize the resetting energy consumption capability under the strong earthquake, and the economic loss generated after the earthquake is effectively reduced.
Description
Technical Field
The invention belongs to the field of civil engineering, and relates to a steel frame with a friction energy dissipation self-resetting device in a beam.
Background
The traditional steel frame is a side force resistant ductility system which is widely adopted based on a collapse resistant design concept, the basic design concept is to control the maximum interlayer displacement angle of a main body structure, and the deformation requirement during earthquake is met through design criteria such as 'strong columns and weak beams', so that the collapse of the structure during strong earthquake is avoided, but the yield energy dissipation mechanism at the beam ends can cause serious damage and residual deformation of the structure, and huge economic loss is brought to the earthquake. Therefore, how to make a building have good recovery function after an earthquake occurs has attracted extensive attention of the international earthquake engineering community. Scholars in different regions successively put forward the concept of a recoverable functional seismic structure, and point out that the seismic thought is changed from a collapse-resistant design to a repairable design. At present, the frame structure mainly adopts post-tensioned prestressed nodes to realize self-recovery capability, and a frame beam and a frame column are assembled into a whole through tensioned prestressed tendons and additional energy dissipaters. The prestressed tendons and the energy dissipaters are used for reliable connection between beams and columns, and provide stable elastic restoring force and energy dissipation capacity for the joints in the earthquake process, so that the main body component of the structure basically keeps elasticity. Although the post-tensioned prestressing node shows better self-resetting performance in the test, the following problems restrict the application of the post-tensioned prestressing node in the practical engineering: (1) as the beam-column joint is opened, the frame-column distance is increased, so that the floor system is cracked, and an accumulation effect is generated as the structural span is increased; (2) the tensioning of the prestressed tendons and the installation of the energy dissipater need to be carried out on a construction site, and are easily affected by construction errors. According to the invention, a gap opening and closing mechanism is introduced into the beam, so that not only is the integrated prefabrication of a factory facilitated, but also the change of the frame column spacing in the deformation process is avoided, and the effective compatibility of 'recoverable function', 'structural deformation coordination' and 'factory prefabrication' is realized.
Disclosure of Invention
The technical problem is as follows: the invention provides a steel frame with a friction energy dissipation self-resetting device in a beam, which can effectively avoid residual deformation of a traditional structure after an earthquake.
The technical scheme is as follows: the invention relates to a steel frame with a friction energy dissipation self-resetting device in a beam, which comprises at least one structural unit, the structural unit comprises two frame columns, an I-shaped steel beam, a through long steel plate, two upper base plates, two lower base plates, a plurality of high-strength bolts, a plurality of butterfly gaskets and two flange connecting plates, two ends of the I-shaped steel beam are connected with the frame column through flange steel plates, a certain gap is reserved between the I-shaped steel beam and the frame column to ensure that one side of the flange connecting plate is cantilevered out of the beam section, the two ends of the through steel plate are welded with the frame column, the upper backing plate is welded on the outer side of the I-shaped steel beam, the lower backing plate is located logical long steel sheet downside, the bolt that excels in is used for connecting I-steel roof beam, logical long steel sheet, upper padding plate and lower backing plate as an organic whole, and the geometric construction of upper padding plate and lower backing plate is the same, butterfly gasket cover is on the bolt that excels in.
Furthermore, the steel frame with the friction energy dissipation self-resetting device in the beam is characterized in that a plurality of upper bolt holes are reserved at the joint of the upper flange of the I-shaped steel beam and the flange plate, and a plurality of lower bolt holes are reserved at the joint of the lower flange and the full-length steel plate, the upper base plate and the lower base plate.
Furthermore, the steel frame with the friction energy dissipation self-resetting device in the beam is characterized in that the joint of the through steel plate and the upper backing plate and the lower backing plate is provided with a convex friction surface, and each friction surface comprises a convex section plane, a convex section slope surface and a transverse sliding groove.
Furthermore, the steel frame with the friction energy dissipation self-resetting device in the beam is characterized in that the upper backing plate is provided with a concave friction surface at the joint of the I-shaped steel beam, the through long steel plate and the lower backing plate, and each friction surface comprises a concave section plane, a concave section slope surface and a backing plate bolt hole.
Furthermore, the steel frame of the friction energy dissipation self-resetting device is arranged in the beam, and the structure comprises a plurality of structural units which are sequentially connected in the vertical direction and share one frame column.
Furthermore, the steel frame of the friction energy dissipation self-resetting device is arranged in the beam, the structure comprises a plurality of structural units which are sequentially connected in the horizontal direction, and two adjacent structural units share one frame column.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) the invention adopts the friction surface with the slope as a stress means in the beam, effectively integrates friction energy consumption and a reset function, and obviously reduces the economic cost of the self-reset structure. The bearing capacity change in the beam can be completed by increasing the number of bolts and friction surfaces, so that the bending strength and the bending rigidity of the beam are decoupled, and the requirements of users on different anti-seismic levels are met conveniently.
(2) The self-resetting steel frame structure can realize the damage prevention of the floor under the action of earthquake. For a traditional self-resetting steel frame structure, beam-column joints are opened to form gaps under the action of an earthquake, energy dissipation components located at the joints generate energy dissipation, the column distance is increased due to the generated gaps, and the complex floor slab arrangement mode is adopted to avoid tensile cracking of the floor slab. The invention generates friction energy consumption by mutual parallel dislocation of the I-shaped steel beam and the through steel plate under the action of an earthquake, does not cause the change of column distance and effectively reduces the tension crack of the floor slab.
(3) The invention can effectively reduce or even avoid the damage of the main body structure under the action of earthquake. For moment frames, by early yielding and failure of part of the members, most of the seismic energy is dissipated by means of plastic deformation of the members, and damage to structural members like beams, columns and the like is often difficult to repair, more likely causing structural collapse. The friction energy dissipation resetting device has the advantages of simple structure, low energy dissipation cost and controllable damage, and the structure can realize complete self-resetting after the multiple groups of belleville springs are arranged in the high-strength bolt without considering the influence of plastic deformation of the main structure.
(6) The invention can realize factory prefabrication of the self-resetting beam and is very suitable for industrial production and manufacturing. Not only can avoid site operation to cause manufacturing error, also can accelerate the construction progress. Because the related processing technology is similar to that of the traditional steel frame, manufacturers can carry out industrial production without great adjustment, thereby reducing the manufacturing difficulty and cost and having higher price competitiveness.
Drawings
FIG. 1 is a three-dimensional schematic view of the apparatus of the present invention;
FIG. 2 is a front view of the apparatus of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a front view of the high tension bolt of FIG. 2 with a butterfly washer disposed thereon;
FIGS. 5(a) and 5(b) are a front view and a cross-sectional view, respectively, of the through steel plate of FIG. 2;
FIGS. 6(a) and 6(b) are front and cross-sectional views, respectively, of the upper backing plate of FIG. 2;
FIG. 7 is a plan view of the flange attachment plate of FIG. 2;
FIG. 8 is a first schematic diagram of the operation of the device of the present invention when it is displaced to the left;
FIG. 9 is a second schematic diagram of the operation of the device of the present invention during rightward displacement;
FIG. 10 is a hysteresis mechanism of the device of the present invention.
The figure shows that: the structure comprises a frame column 1, an I-shaped steel beam 2, an upper bolt hole 21, a lower bolt hole 22, a through long steel plate 3, a raised section plane 31, a raised section slope surface 32, a transverse sliding groove 33, an upper backing plate 4, a depressed section plane 41, a depressed section slope surface 42, a backing plate bolt hole 43, a lower backing plate 5, a high-strength bolt 6, a butterfly-shaped gasket 7, a flange connecting plate 8, a flange plate bolt hole 81 and a flange plate overhanging section 82.
Detailed Description
As shown in fig. 1 to 7, the steel frame with friction energy dissipation self-resetting device in the beam of the invention comprises at least one structural unit, the structural unit comprises two frame columns 1, an i-shaped steel beam 2, a full-length steel plate 3, two upper backing plates 4, two lower backing plates 5, a plurality of high-strength bolts 6, a plurality of butterfly gaskets 7 and two flange connecting plates 8, two ends of the i-shaped steel beam 2 are connected with the frame columns 1 through the flange steel plates 8 by bolts, a certain gap is reserved between the i-shaped steel beam 2 and the frame columns 1 to enable one side of the flange connecting plates 8 to overhang out of the beam section, two ends of the full-length steel plate 3 are welded with the frame columns 1, the upper backing plates 4 are welded on the outer side of the i-shaped steel beam 2, the lower backing plates 5 are positioned on the lower side of the full-length steel plate 3, the high-strength bolts 6 are used for connecting the i-shaped steel beam 2, the full-length steel plate 3, the upper backing plates 4, butterfly gaskets 7 are sleeved on the high-strength bolts 6.
A plurality of upper bolt holes 21 are reserved at the connecting part of the upper flange of the I-shaped steel beam 2 and the flange plate, and a plurality of lower bolt holes 22 are reserved at the connecting part of the lower flange and the full-length steel plate 3, the upper backing plate 4 and the lower backing plate 5.
The joint of the upper backing plate 4 and the lower backing plate 5 of the full-length steel plate 3 is provided with a convex friction surface, and each friction surface comprises a convex section plane 31, a convex section slope 32 and a transverse sliding groove 33. The upper backing plate 4 is provided with a sunken friction surface at the joint of the I-shaped steel beam 2, the through-length steel plate 3 and the lower backing plate 5, and each friction surface comprises a sunken section plane 41, a sunken section slope surface 42 and a backing plate bolt hole 43. The tangent value of the slope inclination angle of the full-length steel plate 3, the upper cushion plate 4 and the lower cushion plate 5 is larger than the friction coefficient value of the friction surface, so that the self-resetting capability in the beam is ensured.
The working principle of the steel frame with the friction energy dissipation self-resetting device in the beam is shown in figures 8-10: when the frame laterally deforms, the frame column 1 inclines, the horizontal displacement of the height position of the frame column 1 is transmitted to the I-shaped steel beam 2 and the full-length steel plate 3 through beam-column connection, horizontal dislocation in the beam is caused, and the generated friction sliding can dissipate seismic energy. Due to the existence of the slope, the vertical distance between the full-length steel plate 3 and the upper backing plate 4 and between the full-length steel plate and the lower backing plate 5 is increased in horizontal sliding, and then the butterfly-shaped gasket 7 sleeved on the high-strength bolt 6 is extruded. When the butterfly gaskets 7 are connected in series and in parallel, the elastic deformation and the bearing capacity of the butterfly gaskets 7 can be respectively increased. After the earthquake is over, the elastic extrusion force of the butterfly-shaped gasket 7 can overcome the sliding friction force of the slope surfaces of the full-length steel plate 3, the upper backing plate 4 and the lower backing plate 5 to realize the self-resetting function of the frame. No matter the floor is shifted to the left side or the right side, the column distance is not changed all the time, so the floor is not pulled to crack by the self-resetting mechanism. The bending rigidity and the strength of the novel beam structure are decoupled, and the bending strength of the beam can be continuously increased by increasing the number of the high-strength bolts and the corresponding friction surfaces.
Claims (6)
1. A steel frame with a friction energy dissipation self-resetting device in a beam is characterized in that the structure comprises at least one structural unit, the structural unit comprises two frame columns (1), an I-shaped steel beam (2), a full-length steel plate (3), two upper base plates (4), two lower base plates (5), a plurality of high-strength bolts (6), a plurality of butterfly gaskets (7) and two flange connecting plates (8), two ends of the I-shaped steel beam (2) are connected with the frame columns (1) through the flange steel plates (8), a certain gap is reserved between the I-shaped steel beam (2) and the frame columns (1) to enable one side of the flange connecting plates (8) to overhang a beam section, two ends of the full-length steel plate (3) are welded with the frame columns (1), the upper base plates (4) are welded on the outer sides of the I-shaped steel beam (2), the lower base plates (5) are located on the lower sides of the full-length steel plate (3), the high-strength bolt (6) is used for connecting the I-shaped steel beam (2), the through-length steel plate (3), the upper base plate (4) and the lower base plate (5) into a whole, the upper base plate (4) and the lower base plate (5) are identical in geometric structure, and the butterfly-shaped gasket (7) is sleeved on the high-strength bolt (6).
2. The steel frame with friction energy dissipation self-resetting device in the beam according to claim 1, characterized in that a plurality of upper bolt holes (21) are reserved on the upper flange of the I-shaped steel beam (2) at the joint with the flange plate, and a plurality of lower bolt holes (22) are reserved on the lower flange at the joint with the full length steel plate (3), the upper backing plate (4) and the lower backing plate (5).
3. The steel frame with friction energy dissipation self-resetting device in the beam according to claim 1, characterized in that the through steel plate (3) is provided with convex friction surfaces at the connection with the upper pad plate (4) and the lower pad plate (5), and each friction surface comprises a convex section plane (31), a convex section slope surface (32) and a transverse sliding groove (33).
4. The steel frame with friction energy dissipation self-resetting device in the beam according to claim 1, characterized in that the upper backing plate (4) is provided with concave friction surfaces at the connection with the I-beam (2), the full length steel plate (3) and the lower backing plate (5), and each friction surface comprises a concave section plane (41), a concave section slope surface (42) and a backing plate bolt hole (43).
5. Steel frame with friction energy dissipation self-resetting device inside beam according to claim 1, 2, 3 or 4, characterized by that, the structure includes a plurality of structural units connected in sequence in vertical direction and sharing one frame column (1).
6. Steel frame with friction energy dissipation self-resetting device in beam according to claim 1, 2, 3 or 4, characterized in that the structure comprises a plurality of structural units connected in sequence in horizontal direction, two adjacent structural units share one frame column (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010402829.XA CN111608457A (en) | 2020-05-13 | 2020-05-13 | Steel frame with friction energy dissipation self-resetting device in beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010402829.XA CN111608457A (en) | 2020-05-13 | 2020-05-13 | Steel frame with friction energy dissipation self-resetting device in beam |
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| CN111608457A true CN111608457A (en) | 2020-09-01 |
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| CN202010402829.XA Pending CN111608457A (en) | 2020-05-13 | 2020-05-13 | Steel frame with friction energy dissipation self-resetting device in beam |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123493A (en) * | 2021-04-15 | 2021-07-16 | 重庆大学 | Infilled wall connection mode with recoverable energy consumption function |
| CN113123463A (en) * | 2021-04-15 | 2021-07-16 | 重庆大学 | Steel frame capable of recovering energy consumption and enhancing energy consumption capacity |
| CN113175417A (en) * | 2021-04-15 | 2021-07-27 | 重庆大学 | Wind turbine generator system lattice type tower capable of recovering energy consumption and enhancing energy consumption capacity |
| CN114215410A (en) * | 2021-12-07 | 2022-03-22 | 北京工业大学 | Bearing-self-resetting-energy dissipation unilateral sliding assembly type steel frame beam column joint |
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| CN208137148U (en) * | 2018-04-18 | 2018-11-23 | 山东大学 | Self-resetting bean column node and steel building based on SMA bar |
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| JP2010249169A (en) * | 2009-04-13 | 2010-11-04 | Miwa Tec:Kk | Friction damper |
| CN106567457A (en) * | 2016-11-10 | 2017-04-19 | 同济大学 | Energy dissipation beam column joint for building steel structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123493A (en) * | 2021-04-15 | 2021-07-16 | 重庆大学 | Infilled wall connection mode with recoverable energy consumption function |
| CN113123463A (en) * | 2021-04-15 | 2021-07-16 | 重庆大学 | Steel frame capable of recovering energy consumption and enhancing energy consumption capacity |
| CN113175417A (en) * | 2021-04-15 | 2021-07-27 | 重庆大学 | Wind turbine generator system lattice type tower capable of recovering energy consumption and enhancing energy consumption capacity |
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| CN114215410A (en) * | 2021-12-07 | 2022-03-22 | 北京工业大学 | Bearing-self-resetting-energy dissipation unilateral sliding assembly type steel frame beam column joint |
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