CN109826338B - Cold-formed thin-wall steel plate wall system with built-in friction and negative stiffness composite vibration damper - Google Patents
Cold-formed thin-wall steel plate wall system with built-in friction and negative stiffness composite vibration damper Download PDFInfo
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Abstract
The invention discloses a cold-formed thin-wall steel plate wall system with a built-in friction and negative stiffness composite vibration damper, which consists of a metal supporting square rod, a hinged support, friction plates, a groove-shaped metal plate, bolts, a metal box, a universal hinge, an inclined rod, a metal spring, a high-strength metal plate, a tension spring group, a metal sleeve, side stand columns, a guide rail beam, a steel belt horizontal brace, a screw and a wall panel. The cold-bending thin-wall steel plate wall system with the built-in friction and negative stiffness composite vibration damper has the same action with the common cold-bending thin-wall steel plate wall under normal conditions; under the action of earthquake or wind load, firstly, energy dissipation and vibration reduction are carried out through the relative sliding of friction plates in the internal friction device, and when the sliding displacement exceeds a certain limit value, the groove-shaped metal plate is deformed by the pretightening force applied by the bolt, so that the friction vibration reduction device enters a limiting and locking state. The problems that the existing vibration damper occupies space, influences normal work of a wall body, hinders passing and the like are effectively solved.
Description
Technical Field
The invention relates to a cold-bending thin-wall steel plate wall system with a built-in friction and negative stiffness composite vibration damper, which can fully consume energy under the action of earthquake and wind load through the composite vibration damper arranged in the cold-bending thin-wall steel plate wall, reduce the adverse effect of vibration on a wall body, and reduce the dynamic response of the wall body structure, and belongs to the field of building structure earthquake-resistant and wind-resistant and vibration damping control.
Background
The cold-formed thin-walled steel house system is a structural system formed by using galvanized cold-formed thin-walled steel keels as main bearing materials, and is widely applied to various countries such as China, America, Japan and the like. The cold-formed thin-walled steel plate wall is a main stressed component of the structural system and bears the vertical load of a house system and the horizontal action caused by wind load and earthquake action. In order to reduce the damage of external vibration to the cold-formed thin-walled steel plate wall and reduce economic loss and casualties caused by earthquake disasters, the vibration reduction design of the cold-formed thin-walled steel plate wall is a work which needs to be carried out urgently when a cold-formed thin-walled steel house is built.
The basic principle of vibration reduction design is to prolong the self-vibration period of the structure by adopting the means of increasing the damping ratio of the structure or reducing the natural frequency of the structure, effectively isolate the earthquake action and reduce the vibration transmission capability of the structure, thereby protecting the main body of the structure from being damaged. The vibration damping device can be divided into the following control methods: passive control, active control, semi-active control, intelligent control and hybrid control. At present, common vibration dampers include friction vibration dampers, damping vibration dampers, memory alloy vibration dampers, and the like. The friction vibration damper has good vibration damping effect, simple structure, clear mechanical model, wide application range, convenient maintenance and low cost, and becomes the most widely used passive energy dissipation vibration damper at present.
Arranging damping devices in the structure increases the stiffness of the structure more or less, thereby causing the natural frequency of vibration of the structure to increase, and thus the acceleration response of the structure cannot be effectively controlled. The negative stiffness vibration damping device is connected in parallel through the positive stiffness spring element and the negative stiffness spring element, so that the stiffness of a structural system and the natural vibration frequency of the structural system are reduced, the purpose of damping the structure is achieved, and the negative stiffness vibration damping device also has the advantages of high bearing capacity, large vibration isolation range and the like, so that the negative stiffness vibration damping device is widely concerned by experts and scholars and is widely used in engineering.
Various common vibration damping devices on the market at present cannot be arranged in a limited space inside a cold-formed thin-wall steel plate wall due to the limitations of size, arrangement mode and the like. Therefore, the method has extremely important significance for developing a cold-formed thin-walled steel plate wall system with a built-in vibration damper aiming at cold-formed thin-walled steel houses.
Disclosure of Invention
In order to solve the problems, the invention provides a cold-formed thin-wall steel plate wall system with a built-in friction and negative stiffness composite vibration damper and a manufacturing method thereof based on a negative stiffness principle and a friction energy consumption principle. The vibration damping device has the advantages of simple structure, low cost, small occupied space, wide vibration damping range, no increase of the rigidity of a structural system and the like. Under the action of earthquake and wind load, the friction and negative rigidity composite vibration damping device hidden in the cold-bending thin-wall steel plate wall can effectively dissipate vibration energy in a wall structure, prevent the wall from resonating and protect the safety of the wall structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cold-formed thin-wall steel plate wall system with a built-in friction and negative stiffness composite vibration damper comprises a metal supporting square rod (1), a hinged support (2), friction plates (3), groove-shaped metal plates (4), bolts (5), a metal box (6), universal hinges (7), inclined rods (8), metal springs (9), high-strength metal plates (10), tension spring sets (11), metal sleeves (12), side stand columns (13), stand columns (14), guide rail beams (15), steel belt horizontal braces (16), screws (17) and wall panels (18);
the metal supporting square rod (1) is connected with the side upright post (13) and the guide rail beam (15) of the cold-bending thin-wall steel plate wall through the hinged support (2); the metal box (6) is welded with the metal supporting square rod (1); the middle of the metal supporting square rod (1) penetrates through the upright post (14), and the upright post (14) and the side upright post (13) are horizontally arranged; the steel belt horizontal brace (16) is vertical to the upright post (14) and the side upright post (13); the upright post (14) is connected with the guide rail beam (15) through a screw (17); the wall panel (18) is arranged outside a frame consisting of the side upright posts (13), the upright posts (14) and the guide rail beams (15);
in the metal box (6), an inclined rod (8), a high-strength metal plate (10) and a tension spring set (11) arranged in a metal sleeve (12) are connected through a universal hinge (7) to form a negative stiffness element; one end of the metal spring (9) is connected with the high-strength metal plate, and the other end is connected with the upper top surface and the lower top surface of the metal box (6); the other short metal supporting square rod (1) penetrates through a round hole in the upper part of the metal box (6) and the metal spring (9) and is welded with the high-strength metal plate (10); friction plates (3) are attached to the inner surface of the groove-shaped metal plate (4) and the two side faces of the metal supporting square rod, and the inner surface of the groove-shaped metal plate and the two side faces of the metal supporting square rod are connected through bolts (5) applying pretightening force. The cold-bending thin-wall steel plate wall system with the built-in friction and negative stiffness composite vibration damper firstly plays a role of the friction vibration damper under the action of external vibration, and after the displacement limit value is reached, the friction vibration damper enters a limit locking state, and then plays a vibration damping role through the negative stiffness vibration damper.
Three friction plates (3) are respectively arranged on the side surface of one end of the metal supporting square rod (1), and two friction plates (3) are respectively arranged on the inner surfaces of two sides of the groove-shaped metal plate (4). A certain pretightening force is applied to the friction plates (3) through the bolts (5), so that when the metal supporting square rods (1) drive the friction plates (3) to move, friction force can be generated among the friction plates (3) to reduce vibration and consume energy.
When the metal support square rod (1) and the friction plates (3) on the surface of the metal support square rod slide for positioning and move, the metal support square rod is not in contact with the friction plates (3) on the inner surface of the groove-shaped metal plate (4), the groove-shaped metal plate (4) is slightly deformed inwards through pretightening force applied by the bolt (5), and the friction energy dissipation device enters a limiting and locking state.
The metal supporting square rod (1) drives a negative stiffness element consisting of an inclined rod (8), a high-strength metal plate (10), a universal hinge (7), a tension spring group (11) and a metal sleeve (12) in a metal box (6) to move to generate negative stiffness, a metal spring (9) generates positive stiffness, the negative stiffness element and the positive stiffness element are connected in parallel to control the natural frequency of the cold-bending thin-wall steel plate wall to be close to zero stiffness, the self-vibration frequency of the wall is effectively reduced, and therefore the influence of external vibration on the wall is effectively reduced.
The width of the groove-shaped metal plate (4) is 1.5-2.5 times of the width of the metal supporting square rod (1); the width of the metal box (6) is 1/4-3/4 of the thickness of the cold-formed thin-walled steel plate wall, and the diameter of the top round hole of the metal box is 1.5-2 times of the width of the metal support square rod.
Two metal sleeves (12) with different diameters are sleeved outside the tension spring set (11), and the metal sleeves can extend or shorten along with the tension spring set to ensure that the tension spring set only deforms axially.
Stand (14) comprise two channel-section steels, leave certain space in the middle of two channel-section steels, and the space width is 1.0 ~ 1.5 times of the width of metal support square bar for a complete system of compound damping device and reasonable constitution of wall body, both can construct simultaneously, and compound damping device's arranging does not influence the normal function of wall.
Compared with the prior art, the invention has the following advantages:
1) according to the cold-bending thin-wall steel plate wall system with the built-in friction and negative stiffness composite vibration damper, the vibration damper is arranged in the steel plate wall, the external shape and normal work of the wall are not affected, the vibration damper can be assembled with the wall at the same time, and the workload and the working time are saved.
2) According to the cold-bending thin-wall steel plate wall system with the built-in friction and negative stiffness composite vibration damper, the structural stiffness is controlled to be close to zero stiffness according to the negative stiffness principle, and the self-vibration frequency and the vibration transmission capability of the structure are effectively reduced.
3) The cold-bending thin-wall steel plate wall system with the built-in friction and negative stiffness composite vibration damper can realize graded vibration damping, and can perform energy dissipation and vibration damping through the friction vibration damper under the action of micro vibration; under the action of larger vibration, the friction vibration damper plays a vibration damping role, and then the friction vibration damper enters a limiting and locking state and the negative-stiffness vibration damper plays a vibration damping role.
4) The invention relates to a cold-bending thin-wall steel plate wall system with a built-in friction and negative stiffness composite vibration damper, which is suitable for areas with different seismic fortification intensity by controlling the number of negative stiffness elements, the stiffness of a metal spring and the material (friction coefficient) of a friction plate.
5) According to the cold-formed thin-wall steel plate wall system with the built-in friction and negative stiffness composite vibration damper, the metal sleeve is sleeved outside the tension spring group, so that the tension spring group is ensured to only deform axially, and the negative stiffness element is ensured to have the characteristic of negative stiffness.
6) The cold-formed thin-wall steel plate wall system with the built-in friction and negative stiffness composite vibration damper has the advantages of simple structure, convenience in construction, small occupied space and lower cost compared with other various vibration dampers.
Drawings
FIG. 1 is a three-dimensional effect diagram of a cold-formed thin-walled steel plate wall system with a built-in friction and negative stiffness composite vibration damper.
FIG. 2 is a front view of the cold-formed thin-walled steel plate wall system with the built-in friction and negative stiffness composite damping device.
Figure 3 is a schematic cross-sectional view of a cold-formed thin wall steel wall keel.
Figure 4 is a schematic cross-sectional view of a cold-formed thin-walled steel wall stud.
Fig. 5 is a schematic cross-sectional view of a column of a cold-formed thin-walled steel wall.
Fig. 6 is a schematic cross-sectional view of a cold-formed thin-walled steel plate wall rail beam.
Fig. 7 is a schematic view of the attachment of the hinge support.
Fig. 8 is a schematic view of a friction damping device.
Fig. 9 is a diagram showing a state where the friction damper device exerts a dissipative action.
FIG. 10 is a schematic limit lock of the friction damping device.
FIG. 11 is a sectional view of the friction damping device taken along line 1-1.
FIG. 12 is a cross-sectional view 2-2 of the friction damping device.
FIG. 13 is a schematic view of a negative stiffness vibration damping device
FIG. 14 is a cross-sectional view of the negative stiffness vibration damping device taken along line 1-1.
FIG. 15 is a cross-sectional view 2-2 of the negative stiffness vibration damping device.
Fig. 16 is a schematic view of the connection of the tension spring pack and the metal sleeve.
In the figure: 1-metal supporting square rod, 2-hinged support, 3-friction plate, 4-groove type metal plate, 5-bolt, 6-metal box, 7-universal hinge, 8-diagonal rod, 9-metal spring, 10-high-strength metal plate, 11-tension spring set, 12-metal sleeve, 13-side upright column, 14-upright column, 15-guide rail beam, 16-steel belt horizontal brace, 17-screw and 18-wall panel
The specific implementation mode is as follows:
example 1:
the following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1, the embodiment of the invention is a cold-bending thin-wall steel plate wall system with built-in friction and negative stiffness composite vibration damping device, which mainly comprises: the device comprises a metal supporting square rod 1, a hinged support 2, a friction plate 3, a groove-shaped metal plate 4, a bolt 5, a metal box 6, a universal hinge 7, an inclined rod 8, a metal spring 9, a high-strength metal plate 10, a tension spring group 11, a metal sleeve 12, a side stand column 13, a stand column 14, a guide rail beam 15, a steel belt horizontal brace 16, a screw 17 and a wall panel 18.
The specific implementation steps are as follows:
1) and carrying out vibration reduction design on the cold-formed thin-walled steel plate wall. The wall keel consists of side upright columns, a top guide rail beam and a bottom guide rail beam, and the joints are connected by bolts. The cross sections of the side columns, the columns and the guide rail beams are all formed by channel steel, and as shown in figures 3, 4 and 5, the channel steel dimensions are respectively 200mm multiplied by 110mm multiplied by 10mm, 150mm multiplied by 80mm multiplied by 10mm and 220mm multiplied by 120mm multiplied by 10 mm.
2) The size of the metal support square bar is 30mm multiplied by 30mm, the metal support square bar penetrates through a gap in the middle of the upright post, and the width of the gap is 40mm, so that the square bar is prevented from colliding or rubbing the upright post, and the normal use of the wall is not affected. The metal supporting square rod can be made of steel or other metals.
3) One end of the metal supporting square rod is connected with the side upright post and the top guide rail beam through a hinged support, two layers of friction plates are respectively stuck on two side surfaces of the other end, the size of the innermost layer of friction plate is 30mm multiplied by 60mm multiplied by 3mm, the outer layer of friction plate is composed of two smaller friction plates, the size of the outer layer of friction plate is 30mm multiplied by 15mm multiplied by 3mm, and the distance between the friction plates is equal to the width of the friction plates. The friction plate can be made of resin, rubber, semimetal, etc.
4) The channel metal plate can be welded by three metal plates or rolled by a machine, and the width of the channel metal plate is 60 mm. Two friction plates are respectively stuck on the inner surface of the groove type metal plate, the size of the two friction plates is 30mm multiplied by 15mm multiplied by 3mm, and the space between the friction plates is equal to the width of the friction plates. The groove-shaped metal plate is connected with the metal supporting square rod attached with the friction plate through a bolt (model M10 multiplied by 60), as shown in figure 8, and a certain pretightening force is applied by screwing the bolt so as to ensure that the friction damping device can play a damping role under the action of external vibration.
5) As shown in fig. 13, inside the metal box, the tension spring set and the space between the metal sleeve and the diagonal rod outside the tension spring set, the space between the diagonal rod and the high-strength metal plate, and the space between the diagonal rod and the metal box are all connected by universal hinges to jointly form a negative stiffness element. At the center of the cuboid metal box, one ends of the two metal springs are connected with the high-strength metal plate, and the other ends of the two metal springs are respectively connected with the upper top surface and the lower bottom surface of the metal box. The rigidity of the metal spring is 200N/mm, the rigidity of the tension springs is 10N/mm, and 7 tension springs are shared in the tension spring group.
6) One end of the other metal supporting square rod is welded with the groove-shaped metal plate, and the other end of the other metal supporting square rod penetrates through a round hole in the top of the metal box and the metal spring to be connected with the high-strength metal plate. The size of the metal box is 11cm multiplied by 8cm multiplied by 16cm, the thickness of the metal box is 10mm, the material can be steel or other metals, and the diameter of the top round hole is 45 mm.
7) And finally, one end of a longer metal supporting square rod is welded with the bottom of the metal box, and the other end of the longer metal supporting square rod is connected with the side upright posts and the bottom guide rail beam through hinged supports, so that the arrangement of the friction and negative stiffness composite vibration damping device in the cold-bending thin-wall steel plate wall is completed.
9) The steel belt horizontal brace is connected with the upright post and the side upright post of the steel plate wall through screws, and then the steel plate is used for finishing the cladding work of the keel of the cold-formed thin-wall steel plate wall.
In the embodiment, the friction and negative stiffness composite vibration damping device is arranged inside the cold-formed thin-wall steel plate wall, so that the problems that the vibration damping device occupies a limited space, the normal work of the wall is influenced, the passing is hindered and the like are effectively solved. Under normal conditions, the composite vibration damping device arranged in the cold-formed thin-wall steel plate wall system does not play a role, and the wall body only plays a bearing role. When the wall body bears wind load or earthquake, the friction damping device plays an energy dissipation and vibration damping role, relative displacement occurs between the friction plates, and the pretightening force applied by the bolts enables friction force to be generated between the friction plates to dissipate energy transmitted from the outside. When the displacement limit is reached, the friction damping device enters a limit lock state, as shown in fig. 10. Subsequently, the negative stiffness vibration damping device functions. The metal support square rod drives the high-strength metal plate to move, so that the overall rigidity of the structure is controlled near zero by the negative rigidity generated by the negative rigidity element and the positive rigidity of the metal spring, the cold-bending thin-wall steel plate wall is ensured to be in an ultralow frequency state, the influence of external vibration on the wall is effectively reduced, and the wall is prevented from resonating.
Claims (7)
1. A kind of built-in friction and compound damping device's thin-walled cold-formed steel plate wall system of negative stiffness, characterized by that: the system comprises a metal supporting square rod (1), a hinged support (2), a friction plate (3), a groove-shaped metal plate (4), a bolt (5), a metal box (6), a universal hinge (7), an inclined rod (8), a metal spring (9), a high-strength metal plate (10), a tension spring group (11), a metal sleeve (12), a side stand column (13), a stand column (14), a guide rail beam (15), a steel belt horizontal brace (16), a screw (17) and a wall panel (18);
the upright columns (14) and the side upright columns (13) are horizontally arranged; the steel belt horizontal brace (16) is vertical to the upright post (14) and the side upright post (13); the upright post (14) is connected with the guide rail beam (15) through a screw (17); the wall panel (18) is arranged outside a frame consisting of the side upright posts (13), the upright posts (14) and the guide rail beams (15);
the metal supporting square rods (1) are long, short and long, the longer metal supporting square rod (1) penetrates through the upright column (14), one end of the metal supporting square rod is connected with the side upright column (13) and the guide rail beam (15) of the cold-bending thin-wall steel plate wall through the hinged support (2), and the other end of the metal supporting square rod is welded with the lower bottom surface of the metal box (6); one end of one of the two short metal supporting square rods (1) penetrates through a round hole in the upper part of the metal box (6) and the metal spring (9) to be welded with the upper surface of the high-strength metal plate (10), and the other end of the one of the two short metal supporting square rods is welded with the groove-shaped metal plate (4); one end of the other end is connected with an edge upright post (13) and a guide rail beam (15) of the cold-bending thin-wall steel plate wall through a hinged support (2), and two side surfaces of the other end are stuck with friction plates (3) and are connected with a groove-shaped metal plate (4) through a bolt (5) by applying pretightening force;
in the metal box (6), an inclined rod (8), a high-strength metal plate (10) and a tension spring set (11) arranged in a metal sleeve (12) are connected through a universal hinge (7) to form a negative stiffness element; one end of one metal spring (9) is connected with the upper surface of the high-strength metal plate (10), the other end of the metal spring is connected with the upper top surface of the metal box (6), one end of the other metal spring (9) is connected with the lower surface of the high-strength metal plate (10), and the other end of the other metal spring is connected with the lower top surface of the metal box (6); the cold-bending thin-wall steel plate wall system with the built-in friction and negative stiffness composite vibration damper firstly plays a role of the friction vibration damper under the action of external vibration, and after the displacement limit value is reached, the friction vibration damper enters a limit locking state, and then plays a vibration damping role through the negative stiffness vibration damper.
2. The cold-formed thin-walled steel plate wall system with built-in friction and negative stiffness composite vibration damper as claimed in claim 1, wherein: three friction plates (3) are respectively arranged on the side surface of one end of the metal supporting square rod (1), and two friction plates (3) are respectively arranged on the inner surfaces of two sides of the groove-shaped metal plate (4); a certain pretightening force is applied to the friction plates (3) through the bolts (5), so that when the metal supporting square rods (1) drive the friction plates (3) to move, friction force can be generated among the friction plates (3) to reduce vibration and consume energy.
3. The cold-formed thin-walled steel plate wall system with built-in friction and negative stiffness composite vibration damper as claimed in claim 1, wherein: when the metal support square rod (1) and the friction plates (3) on the surface of the metal support square rod slide for positioning and move, the metal support square rod is not in contact with the friction plates (3) on the inner surface of the groove-shaped metal plate (4), the groove-shaped metal plate (4) is slightly deformed inwards through pretightening force applied by the bolt (5), and the friction energy dissipation device enters a limiting and locking state.
4. The cold-formed thin-walled steel plate wall system with built-in friction and negative stiffness composite vibration damper as claimed in claim 1, wherein: a short metal support square rod (1) drives a negative stiffness element consisting of an inclined rod (8), a high-strength metal plate (10), a universal hinge (7), a tension spring group (11) and a metal sleeve (12) in a metal box (6) to move to generate negative stiffness, a metal spring (9) generates positive stiffness, the negative stiffness and the positive stiffness are connected in parallel to control the natural frequency of a cold-bending thin-wall steel plate wall to be near zero stiffness, the self-vibration frequency of the wall is effectively reduced, and therefore the influence of external vibration on the wall is effectively reduced.
5. The cold-formed thin-walled steel plate wall system with built-in friction and negative stiffness composite vibration damper as claimed in claim 1, wherein: the width of the groove-shaped metal plate (4) is 1.5-2.5 times of the width of the metal supporting square rod (1); the width of the metal box (6) is 1/4-3/4 of the thickness of the cold-formed thin-walled steel plate wall, and the diameter of the top round hole of the metal box is 1.5-2 times of the width of the metal support square rod.
6. The cold-formed thin-walled steel plate wall system with built-in friction and negative stiffness composite vibration damper as claimed in claim 1, wherein: two metal sleeves (12) with different diameters are sleeved outside the tension spring set (11), and the metal sleeves can extend or shorten along with the tension spring set to ensure that the tension spring set only deforms axially.
7. The cold-formed thin-walled steel plate wall system with built-in friction and negative stiffness composite vibration damper as claimed in claim 1, wherein: stand (14) comprise two channel-section steels, leave certain space in the middle of two channel-section steels, and the space width is 1.0 ~ 1.5 times of the width of metal support square bar for a complete system of compound damping device and reasonable constitution of wall body, both can construct simultaneously, and compound damping device's arranging does not influence the normal function of wall.
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| CN111119366A (en) * | 2020-01-20 | 2020-05-08 | 广州大学 | Shape memory alloy negative stiffness damping device |
| CN112922427B (en) * | 2021-01-30 | 2022-12-09 | 深圳市盛隆达建设有限公司 | Assembled wall body that contains circular trajectory |
| CN115182474B (en) * | 2022-06-16 | 2024-04-02 | 桂林理工大学 | Energy-consumption diagonal bracing system based on bistable rod piece system |
| CN115012554B (en) * | 2022-06-23 | 2023-08-22 | 江苏科技大学 | Multilayer cold-formed thin-wall steel structure system and assembly method |
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| JP2007297845A (en) * | 2006-04-28 | 2007-11-15 | Sumitomo Forestry Co Ltd | Vibration control proof stress wall structure |
| CN101126254B (en) * | 2007-09-28 | 2011-12-28 | 清华大学 | Sticking-free stiffening rib steel plate shearing force wall |
| JP4190574B1 (en) * | 2008-06-03 | 2008-12-03 | 積水化学工業株式会社 | building |
| JP5281528B2 (en) * | 2009-09-24 | 2013-09-04 | 特許機器株式会社 | Vertical vibration suppression structure and seismic isolation device |
| CN103821248B (en) * | 2014-03-09 | 2015-11-18 | 北京工业大学 | Spacing link type low frequency shock insulation energy dissipation brace |
| CN205780563U (en) * | 2016-05-23 | 2016-12-07 | 福州大学 | Drawing quasi-zero stiffness vibration isolators |
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