RU14593U1 - DYNAMIC EXTINGUISHER OF VIBRATIONS OF BUILDINGS AND STRUCTURES - Google Patents

Abstract

A dynamic vibration damper of buildings and structures, including a concrete block mounted on the ceiling of the structure by means of supporting elements and springs connecting the block to the structure, characterized in that the concrete block is collapsible, consisting of a concrete slab and individual blocks of various weights, connected into a detachable structure elements on the floor installed dry friction dampers.

Description

DYNAMIC DAMPER OF BUILDING VIBRATIONS

AND CONSTRUCTION

The utility model relates to earthquake-resistant construction and is designed to reduce inertial forces during seismic gouging on buildings and structures.

Known dschamic vibration damper structures, including a block of concrete or lead, installed on the floor by means of supporting bearings, and springs connecting the block with the structure 1.

The disadvantage of this damper is its complexity and low reliability.

The closest in technical essence to utility model 5 is a dynamical vibration damper, including a concrete block, reinforced concrete stops and springs located between them, and placed along the long sides of the block of viscous friction dampers 2.

The disadvantage of this design is the impossibility of reconfiguring the parameters of the damper and, as a consequence, the reduction of its effectiveness arising from changes in the rigidity parameters of the damper during its operation, as well as the difficulty of operation of the damper itself, associated with the need for periodic change of viscous friction dampers.

IPC; E 04 V 1/98

Oscillation, the possibility of TFI the need to reconfigure the parameters of the damper and simplify its operation.

To solve this problem, a dynamic vibration damper of buildings and structures, including a beta-block, mounted on the ceiling of the structure by means of supporting elements and springs connecting the block to the structure, is collapsible, consisting of concrete slabs and separate blocks of different masses, connected into a single structure by detachable elements, dry friction dampers are installed on the floor.

The main parameters affecting the setting of the dynamic vibration damper are its mass and natural frequency. The initial optimal tuning of the absorber is carried out at the two lowest partial vibration frequencies, which are constructed corresponding to the longitudinal and transverse modes of vibration, by selecting the mass of the absorber and the stiffness of the springs located on mutually orthogonal sides of the structure.

However, during long-term operation of the structure as a result of the occurrence of local damage, its rigidity decreases, and, as a result, the period of natural vibrations of the structure increases, as a result, the absorber parameters detune from optical (astn.) This can lead to deterioration of the entire structure under subsequent seismic loads. that the dependences of changes in the rigidity of structures of various structures over time based on the statistical theory of damage accumulation and empirical data zvestna, the change in the absorber mass by removing individual concrete blocks and stiffness of the springs, it is possible

retunement of the damper to the new rigid parameters of the structure. Thus, the utility model increases the efficiency of the absorber and ensures its reliable performance throughout the life of the structure. Simplification of the operation of the damper is associated with the use of dampers (friction, which do not require special devices, their frictional properties do not change during operation. The proposed dampers are cost-effective, as they are made of materials widely used in construction - concrete and sand.

In FIG. a drawing of the proposed design of a dynamic vibration damper of buildings and structures is presented.

To solve this problem, the design of the dynamic vibration damper is made collapsible, consisting of several blocks 1 and one concrete piece 2, interconnected by detachable elements 3; the supporting elements of the damper 6 are balls and plates; springs 4, connecting the concrete slab to the structure, are installed on four mutually orthogonal sides, and the stiffness of the springs is selected from the condition of coincidence of the first two paired sections of the building with the corresponding damper frequencies; the damper is equipped with dry friction dampers 5, which increase the damping of oscillations and prevent significant displacement of the damper relative to the top of the structure. The dry friction damper consists of a concrete pallet 9 located on the floor of the building 10 and filled with sand 7, along which the concrete staff of the damper 8 is moved, rigidly attached to the gasigel plate

The device operates as follows.

When horizontal inertial forces are present due to seismic effects, the damper is switched on instantly, it is provided with spherical support elements 6 and springs 4, which are connected to the damper and the concrete damper plate 2. The vibration damping is carried out due to the presence of dampers, which significantly reduce dampers 5 the friction force of the concrete slab 8 of the damper on the sand 7. After the seismic impact or a long period of operation, the rigidity of the structure is specified and determined tsya new optimum configuration parameters absorber are realized by changing the weight (reducing the number of units 1), and a setting spring. For the normal operation of dry friction dampers, it is only necessary to check periodically for more sand 7 in pallets 9.

The sources of shformation accepted in the promotion:

1. Builder, 1980, No. 3, p. 35

2. The author's certificate of the USSR LY096349, cl. E 04 In 1/98, 1982. Publ. 06/07/84. Bull. No. 21 (prototype).

Claims (1)

A dynamic vibration damper of buildings and structures, including a concrete block mounted on the ceiling of the structure by means of supporting elements and springs connecting the block to the structure, characterized in that the concrete block is collapsible, consisting of a concrete slab and individual blocks of various weights, connected into a detachable structure elements on the floor installed dry friction dampers.