CN108487495B - Damping wall device and method for determining types and quantity of damping elements - Google Patents
Damping wall device and method for determining types and quantity of damping elements Download PDFInfo
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- CN108487495B CN108487495B CN201810262009.8A CN201810262009A CN108487495B CN 108487495 B CN108487495 B CN 108487495B CN 201810262009 A CN201810262009 A CN 201810262009A CN 108487495 B CN108487495 B CN 108487495B
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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
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
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- 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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Abstract
The damping wall device is characterized in that the upper node plate and the lower node plate are connected with the main structure in a diagonal mode in the height direction plane of the main structure, and the steel core is connected with the upper node plate and the lower node plate to form a single inclined strut system together with the main structure. The lower surface of the main structure is provided with a bearing platform, a track is laid on the bearing platform, two ends of the track are provided with sliding limiting clamps, a TMD (transition mode data format) quality source is formed by combining a quality source front side assembly, a quality source rear side assembly, an upper limiting plate and a lower limiting plate, pulleys are arranged on the lower surfaces of the quality source front side assembly and the quality source rear side assembly, the pulleys are placed on the track, a certain gap is reserved in the middle of the quality source, a steel core is clamped in the middle of the quality source, and a rebound element and a damping element are arranged between the end part of the quality source and the main structure, so that the shock absorption wall device with double functions of tuning quality and.
Description
The application is a divisional application of the invention patent application 'tuning mass type yield energy dissipation damping wall device'.
Application date of the original case: 2016-07-08.
Original application No.: 2016105330083.
the name of the original invention is: tuned mass type yield energy dissipation damping wall device.
Technical Field
The invention discloses a damping wall device and a method for determining the type and quantity of damping elements, and relates to an energy dissipation and damping technology of a civil engineering structure.
Background
Tuned Mass Dampers (TMDs) are one of the widely applied technologies in building vibration control at present, and the principle thereof is to tune the natural vibration frequency of the TMD to satisfy a certain relation with the frequency of a main structure, and partially offset the disturbance force of an input structure by the reverse inertia force generated by a vibrator. The Buckling Restrained Brace (BRB) is characterized in that an unbonded restraining unit is arranged around a steel core to improve the stability of the steel core, and then energy dissipation and shock absorption are realized through plastic deformation of the steel core in the tension and compression process.
However, both the conventional TMD and BRB have their limitations: the TMD has the problems of large building space occupation, sensitivity to structural modal attribute change, long starting time, slow effect and the like, and has good wind-induced response and poor earthquake response. The BRB has the problems of yield force limitation and material fatigue resistance, and has excellent anti-seismic performance but poor control on environmental vibration.
Disclosure of Invention
The invention aims to provide a tuned mass type yield energy dissipation damping wall device, which can achieve the following purposes: (1) when the structure is subjected to general environmental vibration, the TMD vibration absorption function can be exerted; (2) when the structure is subjected to earthquake or other destructive impact loads, the metal yield energy dissipation function is exerted; (3) according to the external vibration intensity, the automatic switching between the two shock absorption functions can be realized; (4) the structure is simple, the processing is not complex, the arrangement is flexible in the structure, the space occupancy rate is small, and the assembly, disassembly and maintenance are convenient.
The invention is composed of: a tuned mass type yield energy dissipation damping wall device is composed of an upper node plate, a lower node plate, a steel core, a mass source front side assembly, a mass source rear side assembly, an upper limiting plate, a lower limiting plate, a connecting bolt, a rebound element, a damping element, a pulley, a rail, a limiting clamp, a bearing platform and a main structure. The method is characterized in that: and connecting the upper node plate and the lower node plate with the main structure in a diagonal manner along the height direction plane of the main structure, and connecting the steel core with the upper node plate and the lower node plate to form a single inclined strut system together with the main structure. The method comprises the steps of arranging a bearing platform on the lower surface of a main structure, laying a track on the bearing platform, arranging sliding limiting clamps at two ends of the track, combining a mass source front side assembly, a mass source rear side assembly, an upper limiting plate and a lower limiting plate into a TMD mass source, arranging pulleys on the lower surfaces of the mass source front side assembly and the mass source rear side assembly, then placing the mass source with the pulleys on the track, ensuring that the mass source can freely slide along the direction of the track, leaving a certain gap in the middle of the mass source for the oblique steel core to penetrate through and clamp the steel core in the middle of the mass source, maintaining a 5-10 mm gap between the surface of the steel core and the surface of the mass source, and arranging a rebound element and a damping element between the end of the mass source and the main structure to form the shock absorption wall device with double functions of tuning.
The steel core is composed of a straight-line variable-section metal plate with a large end section and a small yielding working section.
The connection mode of the steel core and the upper node plate and the lower node plate comprises welding, bolt connection and hinging.
The assembly formed by combining the mass source assemblies is a TMD mass source and is also a constraint unit of the steel core.
And the bottom of the TMD mass source front side assembly and the bottom of the mass source rear side assembly are provided with vertical constraint and plane external constraint.
The vertical constraint and the out-of-plane constraint include a rail sliding system or a spring support.
The resilient element comprises a spring and a pre-stressed steel strand. The damping element is a viscous damper.
When the steel core is stressed violently, the working section of the steel core can be subjected to buckling deformation, the inner surfaces of the front side assembly and the rear side assembly of the mass source are extruded through the deformation, and friction generated by extrusion can retard the external TMD to continue working, so that the automatic conversion from tuned mass damping to metal yield energy dissipation damping functions of the damper is realized.
Compared with the prior art, the invention has the following advantages:
the mass source, the resilient element, and the damping element collectively comprise a TMD system when the host structure is subjected to general environmental vibrations. When the mass, the rigidity and the damping of the TMD system meet a certain mathematical relationship, the system can provide reverse inertia force for the structure to reduce the vibration effect of the structure and realize the TMD vibration absorption function.
When the main body structure is subjected to earthquake or other destructive impact loads, the structure generates large interlayer displacement, the steel core can be buckled when being pressed, and the mass sources originally serving as TMD mass sources and distributed on two sides of the steel core can restrain out-of-plane buckling deformation of the steel core and force the steel core to be converted to a high-order buckling mode, so that the metal yield energy consumption function of the steel core is realized.
In the buckling deformation process of the mass source for restraining the steel core, the contact surface of the mass source and the steel core can generate large positive stress, and the friction force generated by the stress can retard the swinging of the TMD system. Because the structure often follows mode attribute change in the large deformation process, the TMD system designed according to the original mode condition is difficult to realize effective vibration absorption, and even the structure load may be increased. Therefore, when the main body structure is subjected to strong impact load, the swinging of the TMD system is stopped due to buckling friction of the inner steel core, so that the automatic switching from TMD vibration reduction to metal yield energy dissipation and vibration reduction functions is realized.
In the device assembly of the invention, the upper gusset plate, the lower gusset plate, the steel core, the mass source and the bearing platform are all regular steel or steel-concrete members; the rebound element, the damping element, the pulley, the track and the limit card can be directly matched with a standard finished product on the market. The components can be assembled only by connecting or welding through standard bolts, so that the structure is simple, the processing is not complex, the structure is flexible to arrange, the space occupancy rate is small, and the assembly, the disassembly and the maintenance are convenient.
In addition, the invention may have the following additional advantages:
the inclined strut system consisting of the upper node plate, the lower node plate and the steel core can provide lateral rigidity for the structure, and the structural deformation is further reduced.
The TMD quality source can be directly made of building partition wall materials, the mass is large, a high mass ratio can be achieved by arranging the TMD quality source at multiple positions in the structure, and the damping effect of the main structure is more obvious.
The TMD quality source is horizontally arranged, so that the problem that the quality source initially slides down too much can not occur, and the TMD quality source is further more favorable for being used in a high-flexibility structure.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a cross-sectional view B-B of FIG. 1;
FIG. 5 is a cross-sectional view C-C of FIG. 1;
FIG. 6 is a cross-sectional view D-D of FIG. 3;
FIG. 1-upper gusset plate; 2-lower gusset plate; 3-a steel core; 4a — a mass source front-side assembly; 4b — mass source back side assembly; 5 a-an upper limiting plate; 5 b-a lower limiting plate; 6-connecting bolts; 7-a resilient element; 8-a damping element; 9-a pulley; 10-a track; 11-a limit card; 12-a cushion cap; 13-main body structure.
Detailed Description
Turning now to the embodiments of the present invention in detail, as shown in FIGS. 1-6, the upper and lower gusset plates 1 and 2 are first attached to the main structure 13, and then the steel core 3 is attached to the upper and lower gusset plates 1 and 2 to form an inclined support system. If the main structure is a reinforced concrete structure, the upper node plate 1 and the lower node plate 2 can be connected with the main structure by adopting a pre-embedded pouring process; if the main structure is a steel structure, the main structure can be connected with the main structure by adopting a welding process. The steel core 3 is connected with the gusset plate by welding or bolts.
A bearing platform 12 is arranged on the lower surface of the main structure, and the sliding rail 10 is placed on the bearing platform. The height of the platform is such that after installation, the lower surface of the source front assembly 4a and source rear assembly 4b is higher than the upper surface of the lower gusset plate 2, while the upper surface of the source front assembly 4a and source rear assembly 4b is lower than the lower surface of the upper gusset plate 1.
Track pulleys are arranged at the bottom of the mass source front side assembly 4a and the mass source rear side assembly 4 b. The number of pulleys is controlled by the total weight of the mass source and the bearing force of a single pulley, but is not lower than 4 at least. The mass source front side assembly 4a and the mass source rear side assembly 4b can be freely slid along the track direction after being placed on the track. The pulleys 9 are preferably steel rail pulleys and are symmetrically arranged.
And (3) the mass source front side assembly 4a and the mass source rear side assembly 4b are in parallel butt joint, and an upper limiting plate 5a and a lower limiting plate 5b are assisted in the middle to jointly form the TMD mass source. The TMD mass source must include a steel core 3 yield energy dissipation segment to prevent premature buckling of the unconstrained portions under severe compression. The mass source front-side assembly 4a, the mass source rear-side assembly 4b and the upper limiting plate 5a or the lower limiting plate 5b are connected through connecting bolts 6, so that the installation and replacement are convenient. The TMD mass source is hollow in the middle, allowing the steel core to pass through the middle. Specifically, during docking, the hole-aligning temporary positioning is performed on the mass source front-side assembly 4a, the mass source rear-side assembly 4b and the upper limiting plate 5a or the lower limiting plate 5b, the connecting bolt 6 sequentially penetrates through the mass source front-side assembly 4a, the upper limiting plate 5a (or 5b) and the mass source rear-side assembly 4b, and the temporary positioning is removed after the tightening. The reserved gap between the middle parts of the mass source front side assembly 4a and the mass source rear side assembly 4b is controlled by an upper limiting plate 5a and a lower limiting plate 5b, the thickness of the limiting plates is larger than that of the steel core 3, so that the two side surfaces of the assembled steel core 3 are not in contact with the inner surfaces of the mass source front side assembly 4a and the mass source rear side assembly 4b, and the thicknesses of the upper limiting plate 5a and the lower limiting plate 5b are the same. The thickness of the limiting plate is not too large, the machining precision permission of a common building component is considered according to the previous performance test research result of the buckling support, and the gap between the surface of the steel core and the surface of the wall body is preferably controlled to be 5-10 mm.
On both sides of the mass source, a spring back element 7 and a damping element 8 are arranged. The rebound element 7 and the damping element 8 are fixed at one end to the main structure and at the other end to the mass source front side assembly 4a and the mass source rear side assembly 4 b.
The type and number of the rebound elements 7 are preferably controlled by the formula (1) so that the damping effect is better. Specifically, to achieve the minimum displacement of the structure, the type and number of the resilient elements 7 are determined by the formula (1 a); in order to achieve a minimum acceleration of the structure, the type and number of resilient elements 7 are determined by equation (1 b):
in the formula (1), gammat,op-the optimal frequency ratio of TMD to the host structure,
wherein f issFrequency of the main structure, ktiStiffness of the ith resilient element 7, nsNumber of resilient elements 7, mt-an assembly4a, 4b and limiting plates 5a and 5 b; μ -mass ratio between TMD mass source and host structure, μ ═ mt/Ms，MsModal mass of body structure ξ0-body structure damping ratio.
The type and number of the damping elements 8 are preferably controlled by the formula (2) to achieve a good damping effect. Specifically, in order to achieve the minimum displacement of the structure, the kind and number of the damping elements 8 are determined by the formula (2 a); in order to achieve a minimum acceleration of the structure, the type and number of damping elements 8 are determined by equation (2 b):
in formula (2), ξt,op-the optimum damping ratio of TMD,
wherein f issFrequency of the main structure, ctiDamping coefficient, n, of the i-th damping element 8cThe number of damping elements 8; the other parameters have the same meanings as in formula (1).
The maximum stretching and compressing length of the rebound element 7 and the damping element 8 is more than or equal to the maximum design swing of the TMD mass source. After the damping wall device is installed, frequency sweep or resonance test needs to be carried out on the damping wall device TMD, and the optimal damping proportion relation between the TMD working frequency and the main structure frequency and the damping is met by adjusting the number, the rigidity and the damping parameters of the rebound element 7 and the damping element 8.
After the system frequency and the damping are debugged, the position of the TMD quality source is centered, and then a limit card 11 is arranged on the track. The distance between the limiting card and the outer edge of the pulley is selected according to the maximum design swing amplitude of the TMD mass source. The minimum distance between the upper, i.e. position plate 5a and lower, position plate 5b and the steel core 3 must be greater than the distance from the outer edge of the pulley to the rail limit clip. After the installation, the effect shown in fig. 2 should be met.
Claims (2)
1. The damping wall device is composed of an upper node plate, a lower node plate, a steel core, a mass source front side assembly, a mass source rear side assembly, an upper limiting plate, a lower limiting plate, a connecting bolt, a rebound element, a damping element, a pulley, a rail, a limiting clamp, a bearing platform and a main structure, and is characterized in that the upper node plate (1) and the lower node plate (2) are connected with the main structure (13) in a diagonal manner along the height direction plane of the main structure (13), the steel core (3) is connected with the upper node plate (1) and the lower node plate (2) to form a single inclined strut system together with the main structure (13), the bearing platform (12) is arranged on the lower surface of the main structure, the rail (10) is laid on the bearing platform (12), the sliding limiting clamps (11) are arranged at two ends of the rail, and the mass source rear side assembly (4b) is arranged on the mass source front side assembly (4a), The mass source device comprises an upper limiting plate (5a) and a lower limiting plate (5b), wherein a TMD mass source is formed by combining the upper limiting plate (5a) and the lower limiting plate (5b), pulleys (9) are arranged on the lower surfaces of a mass source front side assembly (4a) and a mass source rear side assembly (4b), then the mass source with the pulleys (9) arranged thereon is placed on a track (10), the mass source can freely slide along the track (10), a certain gap is reserved in the middle of the mass source, an inclined steel core (3) penetrates through the steel core and clamps the steel core (3) in the middle of the steel core, a gap of 5-10 mm is maintained between the surface of the steel core (3) and the surface of the mass source, and a rebound element (7) and a damping element (8) are arranged between the end of the mass source and a main body structure (13), so that the;
the steel core (3) consists of a straight-line variable-section metal plate with a large end section and a small yielding working section;
the connection mode of the steel core (3) and the upper node plate (1) and the lower node plate (2) comprises welding, bolt connection and hinging;
the TMD quality source is a constraint unit of the steel core (3);
the bottom of the mass source front side assembly (4a) and the bottom of the mass source rear side assembly (4b) are provided with vertical constraint and out-of-plane constraint;
the vertical constraint and the out-of-plane constraint comprise a rail sliding system or a spring support;
the rebound element (7) comprises a spring and a prestressed steel strand, and the damping element (8) is a viscous damper;
when the shock absorber is stressed violently, the working section of the steel core (3) can generate buckling deformation, the inner surfaces of the mass source front side assembly (4a) and the mass source rear side assembly (4b) are extruded through the deformation, and the friction generated by the extrusion can retard the external TMD to continue working, so that the automatic conversion from tuned mass damping to metal yield energy dissipation damping function of the shock absorber is realized;
in order to achieve a minimum displacement of the structure, the type and number of damping elements (8) are defined by the following formula:
in the formula, ξt,op-the optimum damping ratio of TMD,
wherein f issFrequency of the main structure, cti-damping coefficient, n, of the ith damping element (8)c-the number of damping elements (8), mt-the total mass of the mass source front assembly (4a), the mass source rear assembly (4b), the upper limit plate (5a) and the lower limit plate (5 b); μ -mass ratio between TMD mass source and host structure, μ ═ mt/Ms，MsModal mass of body structure ξ0-body structure damping ratio.
2. Method for determining the number of types of damping elements, characterized in that, in order to achieve a minimum displacement of the structure, the types and number of damping elements (8) are determined by the following formula:
in the formula, ξt,op-the optimum damping ratio of TMD,
wherein f issFrequency of the main structure, cti-damping coefficient, n, of the ith damping element (8)c-the number of damping elements (8), mt-mass source front side assembly (4a), mass source rearThe total mass of the side assembly (4b), the upper limit plate (5a) and the lower limit plate (5 b); μ -mass ratio between TMD mass source and host structure, μ ═ mt/Ms，MsModal mass of body structure ξ0-the body structure damping ratio;
the method for determining the variety and the number of the damping elements is used for a damping wall device;
the damping wall device consists of an upper node plate, a lower node plate, a steel core, a mass source front side assembly, a mass source rear side assembly, an upper limiting plate, a lower limiting plate, a connecting bolt, a rebound element, a damping element, a pulley, a rail, a limiting clamp, a bearing platform and a main structure, wherein the upper node plate (1) and the lower node plate (2) are connected with the main structure (13) in a diagonal form along the height direction plane of the main structure (13), the steel core (3) is connected with the upper node plate (1) and the lower node plate (2) to form a single inclined strut system together with the main structure (13), the lower surface of the main structure is provided with the bearing platform (12), the rail (10) is laid on the bearing platform (12), the two ends of the rail are provided with the sliding limiting clamps (11), and the TMD mass source is formed by the mass source front side assembly (4a), the mass source rear side assembly (4b), the upper limiting plate (5a) and the lower limiting plate (5b), the lower surfaces of a mass source front side assembly (4a) and a mass source rear side assembly (4b) are provided with pulleys (9), then the mass source provided with the pulleys (9) is placed on a rail (10), the mass source can freely slide along the direction of the rail (10), a certain gap is reserved in the middle of the mass source, an oblique steel core (3) penetrates through the gap, the steel core (3) is clamped in the middle of the gap, a gap of 5-10 mm is maintained between the surface of the steel core (3) and the surface of the mass source, and a rebound element (7) and a damping element (8) are arranged between the end part of the mass source and a main body structure (13) to form a damping wall device with dual functions of mass tuning and metal yield energy dissipation and damping;
the steel core (3) consists of a straight-line variable-section metal plate with a large end section and a small yielding working section;
the connection mode of the steel core (3) and the upper node plate (1) and the lower node plate (2) comprises welding, bolt connection and hinging;
the TMD quality source is a constraint unit of the steel core (3);
the bottom of the mass source front side assembly (4a) and the bottom of the mass source rear side assembly (4b) are provided with vertical constraint and out-of-plane constraint;
the vertical constraint and the out-of-plane constraint comprise a rail sliding system or a spring support;
the rebound element (7) comprises a spring and a prestressed steel strand, and the damping element (8) is a viscous damper;
when the shock absorber is stressed violently, the working section of the steel core (3) can generate buckling deformation, the inner surfaces of the mass source front side assembly (4a) and the mass source rear side assembly (4b) are extruded through the deformation, and friction generated by extrusion can retard the external TMD to continue working, so that the shock absorber can automatically convert from tuned mass damping to metal yield energy dissipation damping.
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| CN201610533008.3A CN106088391B (en) | 2016-07-08 | 2016-07-08 | Tuning quality type surrenders energy-dissipating and shock-absorbing wall device |
| CN201810262009.8A CN108487495B (en) | 2016-07-08 | 2016-07-08 | Damping wall device and method for determining types and quantity of damping elements |
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| CN201610533008.3A Expired - Fee Related CN106088391B (en) | 2016-07-08 | 2016-07-08 | Tuning quality type surrenders energy-dissipating and shock-absorbing wall device |
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| CN201610533008.3A Expired - Fee Related CN106088391B (en) | 2016-07-08 | 2016-07-08 | Tuning quality type surrenders energy-dissipating and shock-absorbing wall device |
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| CN106836549A (en) * | 2017-03-30 | 2017-06-13 | 贵州大学 | A kind of slip filling wall with frcition damper |
| CN107740508B (en) * | 2017-10-21 | 2019-06-25 | 山东建筑大学 | A kind of antidetonation wall and its construction method |
| CN113089866A (en) * | 2021-03-18 | 2021-07-09 | 兰州大学 | Civil engineering shock attenuation component |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108396884B (en) | 2019-09-27 |
| CN108396884A (en) | 2018-08-14 |
| CN108487496A (en) | 2018-09-04 |
| CN108487495A (en) | 2018-09-04 |
| CN108442567B (en) | 2019-11-08 |
| CN106088391A (en) | 2016-11-09 |
| CN108442567A (en) | 2018-08-24 |
| CN106088391B (en) | 2018-09-21 |
| CN108487496B (en) | 2019-11-26 |
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