CN205875450U - Harmonious quality type surrender energy dissipation shock attenuation wall device - Google Patents

Abstract

A tuned-mass type yield energy-dissipating shock-absorbing wall device, the upper gusset plate and the lower gusset plate are connected to the main structure in a diagonal form in the plane along the height direction of the main structure, and the steel core is connected to the upper gusset plate and the lower gusset plate. The main structure together forms a mono-bracing system. Set the cap on the lower surface of the main structure, lay the track on the cap, and set the sliding limit cards at both ends of the track. The tuning mass is composed of the front side component of the mass source, the rear side component of the mass source, the upper limit plate and the lower limit plate. Damper TMD mass source, and set pulleys on the lower surface of the mass source front side assembly and the mass source rear side assembly, then place the pulleys on the track, leave a certain gap in the middle of the mass source, and clamp the steel core in the middle, Rebound elements and damping elements are arranged between the end of the mass source and the main structure to form a shock-absorbing wall device with dual functions of tuning mass and metal yield energy dissipation and shock absorption.

Description

Tuned mass type yield energy dissipation seismic wall device

technical field

The utility model relates to a dual-function compound shock absorbing wall device, in particular to a tuning mass type yield energy dissipation shock wall device. It is a new technology invention in the field of energy dissipation and shock absorption of civil engineering structures.

Background technique

The tuned mass damper (TMD) is one of the technologies widely used in building vibration control at present. Partially offset the disturbing force input to the structure. Buckling-resistant bracing (BRB) is to arrange unbonded constrained units around the steel core to improve its stability, and then realize energy dissipation and shock absorption through the plastic deformation of the steel core during tension and compression.

However, both traditional TMD and BRB have their own limitations: TMD takes up a lot of building space, is sensitive to changes in structural modal properties, takes a long time to start, and is slow to take effect. It has good wind-induced response and poor seismic response. BRB has the problems of yield force limitation and material fatigue resistance. It has excellent anti-seismic performance, but it has poor control of environmental vibration.

Contents of the invention

The utility model aims to provide a tuned mass type yield energy-dissipating shock-absorbing wall device, which can achieve the following purposes: (1) When the structure is subjected to general environmental vibration, it can exert the TMD vibration-absorbing function; (2) when When the structure is subjected to earthquake or other destructive impact loads, it will exert the metal yield energy dissipation function; (3) According to the external vibration intensity, it can realize automatic switching between the two shock absorption functions; (4) The structure is simple, the processing is not complicated, It is used for flexible arrangement in the structure, small space occupation rate, convenient loading, unloading and maintenance.

Composition of the utility model: a tuning mass type yield energy dissipation shock-absorbing wall device, which consists of an upper gusset plate, a lower gusset plate, a steel core, a mass source front side assembly, a mass source rear side assembly, an upper limit plate, a lower limit plate Position plate, connecting bolts, rebound elements, damping elements, pulleys, rails, limit cards, caps and main structure, characterized in that: the upper gusset plate and the lower gusset plate form a diagonal in the plane along the height direction of the main structure The form is connected with the main structure, the steel core is connected with the upper gusset plate and the lower gusset plate, together with the main structure to form a single diagonal bracing system, the cap is set on the lower surface of the main structure, the track is laid on the cap, and the two ends of the track are set to slide Limit card, through mass source front side assembly, mass source rear side assembly, upper limit plate and lower limit plate to form tuning mass damper TMD mass source, and under mass source front side component and mass source rear side component Set pulleys on the surface, then place the mass source after setting the pulleys on the track, and ensure that the mass source can slide freely along the track direction, leave a certain gap in the middle of the mass source for the oblique steel core to pass through and clamp the steel core In the middle, the surface of the steel core maintains a gap of 5~10mm between the surface of the mass source, and a rebound element and a damping element are arranged between the end of the mass source and the main structure to form a shock absorber with dual functions of tuning mass and metal yield energy dissipation and shock absorption wall fixtures.

The steel core is composed of a metal plate with variable cross-section, which has a large cross-section at the end and a small cross-section at the yielding working section.

The connection methods of the steel core with the upper gusset plate and the lower gusset plate include welding, bolting and hinged connection.

The assembly composed of the mass source components is not only the mass source of the TMD system, but also the constraining unit of the steel core.

Vertical constraints and out-of-plane constraints are provided at the bottom of the TMD mass source front assembly and mass source rear assembly.

The vertical and out-of-plane constraints include rail sliding systems or spring mounts.

The resilient element includes a spring and a prestressed steel strand, and the damping element is a viscous damper.

When the pressure is severe, the working section of the steel core will undergo buckling deformation, and through this deformation, the inner surface of the mass source front assembly and the mass source rear assembly will be squeezed, and the friction generated by this extrusion can block the external TMD from continuing to work , to realize the automatic conversion of the shock absorber from the function of tuning mass vibration reduction to metal yield energy dissipation.

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

When the main structure is subjected to general environmental vibrations, the mass source, the resilient element and the damping element together form a TMD system. When the mass, stiffness and damping of the TMD system satisfy a certain mathematical relationship, the system can provide the structure with a reverse inertial force to reduce the structural vibration effect and realize the TMD vibration absorption function.

When the main structure is subjected to earthquake or other destructive impact loads, the structure has a large interstory displacement, and the steel core will buckle when it is under compression. Constrain the out-of-plane buckling deformation of the steel core, force it to transform into a higher-order buckling mode, and realize the metal yield energy dissipation function of the steel core.

When the mass source constrains the buckling deformation of the steel core, the contact surface between the two will generate a large positive stress, and the friction generated by the stress will block the swing of the TMD system. Due to the large deformation process of the structure, the modal properties are often accompanied by changes. At this time, the TMD system designed according to the original modal conditions is not only difficult to achieve effective vibration absorption, but may even increase the structural burden. Therefore, when the main structure is subjected to a strong impact load, the swing of the TMD system will stop due to the buckling friction of the internal steel core, thereby realizing the automatic switching from TMD vibration reduction to metal yield energy dissipation and shock absorption.

In the device assembly of the utility model, 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 components; Bit cards can be directly matched with standardized finished products on the market. The components can be assembled only by standard bolt connection or welding, so it has the technical characteristics of simple structure, uncomplicated processing, flexible layout in the structure, small space occupation, and convenient assembly, disassembly and maintenance.

In addition, the utility model can also have the following additional advantages:

The diagonal bracing system composed of the upper gusset plate, the lower gusset plate and the steel core can provide lateral rigidity for the structure and further reduce structural deformation.

The TMD mass source can directly use the building partition wall material, which has a large mass and can be arranged in multiple places in the structure to achieve a higher mass ratio, thereby making the vibration reduction effect of the main structure more obvious.

The TMD mass source is placed horizontally, and the problem of excessive initial slide of the mass source does not occur, which is more favorable for use in high-flexibility structures.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a front view of the utility model;

Fig. 3 is A-A sectional view of Fig. 1;

Fig. 4 is the B-B sectional view of Fig. 1;

Fig. 5 is a C-C sectional view of Fig. 1;

Fig. 6 is a D-D sectional view of Fig. 3;

In the figure 1—upper gusset plate; 2—lower gusset plate; 3—steel core; 4a—mass source front assembly; 4b—mass source rear assembly; 5a—upper limiting plate; 5b—lower limiting plate; 6 —connecting bolt; 7—rebound element; 8—damping element; 9—pulley; 10—track; 11—limit card;

detailed description

Describe the embodiment of the utility model in detail below, as shown in Fig. 1-6, first connect the upper gusset plate 1 and the lower gusset plate 2 with the main structure 13, then connect the steel core 3 with the upper gusset plate 1 and the lower gusset plate 2 Connected to form a diagonal support system. If the main structure is a reinforced concrete structure, the upper gusset plate 1 and the lower gusset plate 2 can be connected to the main structure by pre-embedded pouring technology; if the main structure is a steel structure, the welding process can be used to connect to the main structure. The connection between the steel core 3 and the gusset plate is welded or bolted.

A bearing platform 12 is arranged on the lower surface of the main structure, and a sliding track 10 is placed on the bearing platform. The height of the platform should ensure that after installation, the lower surface of the mass source front side assembly 4a and the mass source rear side assembly 4b is higher than the upper surface of the lower gusset plate 2, while the mass source front side assembly 4a and the mass source rear side assembly 4b The upper surface 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 4b. The number of pulleys is controlled by the total weight of the mass source and the bearing capacity of a single pulley, but at least not less than 4. Ensure that the mass source front side assembly 4a and the mass source rear side assembly 4b can slide freely along the track direction after being placed on the track. The pulley 9 should adopt a rail pulley and be symmetrically arranged.

The mass source front side assembly 4a is connected in parallel with the mass source rear side assembly 4b, and the upper limit plate 5a and the lower limit plate 5b are supplemented in the middle to form a TMD mass source. The TMD mass source must include the steel core 3 yield energy dissipation section to prevent the unconstrained part from being severely compressed and prematurely destabilized. The mass source front assembly 4a, the mass source rear assembly 4b and the upper limiting plate 5a or the lower limiting plate 5b are connected by connecting bolts 6 for easy installation and replacement. The middle of the TMD quality source is empty, allowing the steel core to pass through the middle. Specifically, when docking, temporarily position the holes of the mass source front side assembly 4a, the mass source rear side assembly 4b, and the upper limit plate 5a or lower limit plate 5b, and pass the connecting bolts 6 sequentially through the mass source front side assembly 4a, the upper limit plate 5a (or 5b) and the mass source rear side assembly 4b, remove the temporary positioning after tightening. The reserved space in the middle of the mass source front side assembly 4a and the mass source rear side assembly 4b is controlled by the upper limit plate 5a and the lower limit plate 5b, and the thickness of the limit plate should be greater than the thickness of the steel core 3 to ensure that the assembled steel core 3 There is no contact between the surfaces on both sides and the inner surfaces of the mass source front assembly 4a and the mass source rear assembly 4b, and the thickness of the upper limiting plate 5a and the lower limiting plate 5b should be the same. The thickness of the limit plate should not be too large. According to the previous research results on buckling support performance tests and considering the processing accuracy of general building components, the gap between the steel core surface and the wall surface should be controlled between 5 and 10mm.

Rebound elements 7 and damping elements 8 are arranged on both sides of the mass source. One end of the rebound element 7 and the damping element 8 is fixed on the main structure, and the other end is fixed on the mass source front side assembly 4a and the mass source rear side assembly 4b.

The type and quantity of the rebounding element 7 should be controlled by formula (1), so that the damping effect is better. Specifically, in order to achieve the minimum displacement of the structure, the type and quantity of the resilient element 7 are determined by formula (1a); in order to achieve the minimum acceleration of the structure, the type and quantity of the resilient element 7 are determined by formula (1b):

(1)

In formula (1), γ _t,op ——optimum frequency ratio of TMD to main structure, Where f _s ——main structure frequency, k _{t i} ——stiffness of i -th rebound element 7, n _s ——quantity of rebound element 7, m _t ——components 4a, 4b and limiting plates 5a and 5b total mass of ; μ ——mass ratio between TMD mass source and main structure, M _s ——the modal mass of the main structure; ξ ₀ ——the damping ratio of the main structure.

The type and quantity of the damping elements 8 should be controlled by formula (2), so that the damping effect is better. Specifically, in order to achieve the minimum displacement of the structure, the type and quantity of damping elements 8 are determined by formula (2a); in order to achieve the minimum acceleration of the structure, the type and quantity of damping elements 8 are determined by formula (2b):

(2)

In formula (2), ξ _t,op —— TMD optimal damping ratio, Where f _s ——the frequency of the main structure, c _{ti ——the} damping coefficient of the i -th damping element 8, n _c ——the number of damping elements 8; the meanings of other parameters are the same as in formula (1).

The maximum tensile and compressive lengths of the rebound element 7 and the damping element 8 should be greater than or equal to the maximum design swing of the TMD mass source. After the installation is completed, it is necessary to perform a frequency sweep or resonance test on the TMD of the vibration-absorbing wall device. By adjusting the number, stiffness and damping parameters of the rebound element 7 and damping element 8, the operating frequency of the TMD meets the optimum value between the frequency of the main structure and the damping. Excellent vibration reduction ratio relationship.

After the system frequency and damping are debugged, the position of the TMD mass source is centered, and then the limit card 11 is set on the track. The distance between the limit card and the outer edge of the pulley is taken according to the maximum design swing of the TMD mass source. The minimum distance between the upper limit plate 5a and the lower limit plate 5b and the steel core 3 must be greater than the distance from the outer edge of the pulley to the track limit card. After installation, it should meet the effect shown in Figure 2.

Claims (8)

1. a tuning quality type surrender energy-dissipating and shock-absorbing wall device, before upper node plate, bottom gusset plate, steel core, Mass Sources Assembly on rear side of side assembly, Mass Sources, top limiting plate, lower limit plate, connecting bolt, resilient element, damping element, pulley, Track, limiting card, cushion cap and agent structure composition, it is characterised in that: by main to upper node plate (1) and bottom gusset plate (2) edge It is connected with agent structure (13) in diagonal form in body structure (13) short transverse plane, by steel core (3) and upper node plate (1) Connect with bottom gusset plate (2), be collectively forming a monocline support body system with agent structure (13), arrange at agent structure lower surface Cushion cap (12), cushion cap (12) lays track (10) above, and track two ends arrange slip limiting card (11), by group on front side of Mass Sources On rear side of part (4a), Mass Sources, assembly (4b), top limiting plate (5a) and lower limit plate (5b) are combined into tuned mass damper TMD Mass Sources, and on front side of Mass Sources, on rear side of assembly (4a) and Mass Sources, assembly (4b) lower surface arranges pulley (9), then will Arrange the Mass Sources after pulley (9) to be placed on track (10), and ensure Mass Sources can along track (10) direction slidably, Reserve a fixed gap in the middle of described Mass Sources, pass for oblique steel core (3) and steel core (3) is pressed from both sides in the middle, steel core (3) surface Maintain 5 ~ 10mm gap with Mass Sources surface, resilient element (7) and damping are set between Mass Sources end and agent structure (13) Element (8), is formed and has tuning quality and the shock absorption wall device of metal yield energy-dissipating and shock-absorbing dual-use function.

Tuning quality type the most according to claim 1 surrender energy-dissipating and shock-absorbing wall device, it is characterised in that described steel core (3) Big by end cross-sectional, that surrender active section cross section is a little word variable cross-section metallic plate composition.

Tuning quality type the most according to claim 1 surrender energy-dissipating and shock-absorbing wall device, it is characterised in that described steel core (3) Include that with the connected mode of upper node plate (1) and bottom gusset plate (2) welding, bolt are connected and hinged.

Tuning quality type the most according to claim 1 surrender energy-dissipating and shock-absorbing wall device, it is characterised in that before described Mass Sources Side assembly (4a), assembly (4b) on rear side of Mass Sources, top limiting plate (5a), the assembly that lower limit plate (5b) is combined into is TMD mass of system source, is again the constraint element of steel core (3) simultaneously.

Tuning quality type the most according to claim 1 surrender energy-dissipating and shock-absorbing wall device, it is characterised in that described TMD mass On front side of source, on rear side of assembly (4a) and Mass Sources, assembly (4b) bottom is provided with vertical constraint peace out of plane constraint.

Tuning quality type the most according to claim 5 surrender energy-dissipating and shock-absorbing wall device, it is characterised in that described vertical constraint Peace out of plane constraint includes slide system or spring fastening.

Tuning quality type the most according to claim 1 surrender energy-dissipating and shock-absorbing wall device, it is characterised in that described resilient element (7) include that spring and prestress wire, described damping element (8) are viscous damper.

Tuning quality type the most according to claim 1 surrender energy-dissipating and shock-absorbing wall device, it is characterised in that violent at pressurized Time, the active section of steel core (3) can occur bending deformation, and by assembly (4a) on front side of this deformable squeeze Mass Sources and Mass Sources after Side assembly (4b) inner surface, the produced friction of this extruding can be blocked outside TMD and be worked on, it is achieved amortisseur is from tuning quality Vibration damping is to the automatic conversion of metal yield energy-dissipating and shock-absorbing function.