Novel semi-active compound tuned damper

Abstract

The invention relates to a novel semi-active compound tuned damper which can control structural vibration and reduce wind load as well as structural response under the action of earthquake. The novelsemi-active compound tuned damper comprises a cylinder case, an angle-steel connecting device, a connecting steel tube, an energy-dissipating damping fluid, a cruciform metal plate, spherical hinges and a servo control system. The invention provides a spherical hinge system which can adapt to the randomness of the directions of the actions of wind and earthquake and achieve three levels of vibration damping. The first level of vibration damping is achieved by using the damping fluid for frequency modulation as well as the forces of friction and collision between the damping fluid and the cruciform metal plate. The second level of vibration damping is achieved by using the rotation of the spherical hinges, the cruciform metal plate participates in swinging to form mass tuning, and the inertia force of the cruciform metal plate provides a greater damping effect. The third level of vibration damping is achieved by using the servo control system for controlling; and the one-way force of anactuator is transformed into a force of which the acting direction is opposite to that of the force of earthquake through the spherical hinge system, and the force acts on the cruciform metal plate to enhance the damping effect.

Description

technical field [0001] The invention relates to the technical field of energy dissipation and shock absorption of civil engineering structures, in particular to a novel semi-active composite tuned damper for controlling structural vibration and reducing structural response under wind load and earthquake. Background technique [0002] Under the action of wind load and earthquake, it is very difficult to control the lateral deformation of high-rise structures, and this problem has received extensive attention from relevant experts. A lot of practice has proved that the mass tuned damper (TMD) is a very effective damping control device. By setting the lateral stiffness, mass and damping parameters reasonably, the lateral stiffness of the structure can be greatly reduced. vibration and reduce the horizontal shear force on the structure. [0003] In recent years, mass tuned dampers have been used more and more widely as a device for energy dissipation and vibration reduction. Th...

AI Technical Summary

Problems solved by technology

However, the TMD system requires a large inertial mass and often requires additional space, which is not conducive to the use of structural space, and there is a problem of start-up lag

[0004] The liquid mass tuned damper, through the mass inertia of the liquid under the earthquake, generates the hydrodynamic pressure opposite to the vibration direction of the structure, so that the vibration of the main structure is reduced, but its use will be limited by engineering conditions

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