Rod Negative Stiffness Device

Abstract

The invention belongs to the field of vibration control of a negative stiffness structure of the construction engineering damping technology, and provides a rod type negative stiffness device. The rodtype negative stiffness device comprises an H-shaped steel outer plate, a channel steel inner plate, a pulley guide rod, a steel strand and a channel steel pulley; the pre-tensile force of the prestress steel strand is converted into horizontal output force through the channel steel pulley and an arc rail plate; the pre-tensile force is stored in the steel strand when the pulley guide rod is at the highest point of the arc of the arc-shaped rail plate; when displacement excitation is applied to the end part of the H-shaped steel outer plate, the H-shaped steel outer plate extends outwards, atthe moment, the pulley guide rod moves towards the lowest point of the arc-shaped rail plate, the pre-tensile force of the prestress steel strand is released, the H-shaped steel outer plate moves towards the displacement excitation direction to generate acting force which is the same as the displacement excitation direction, and then the negative stiffness is provided for a structure. The rod type negative stiffness device is arranged in the structure in an inclined supporting manner, and the stiffness of the structure is reduced by providing the negative stiffness for the structure, so thatthe vibration control of the structure is realized.

Description

technical field [0001] The invention relates to the field of novel structural vibration control of construction engineering technology, in particular to a rod-type negative stiffness device. Background technique [0002] Negative stiffness devices are mainly used in the vibration isolation of mechanical devices, and are rarely used in the field of anti-seismic building structures. The negative stiffness device is a new type of component in the field of vibration isolation of new building structures. The negative stiffness devices that have been proposed so far mainly include spring-type negative-stiffness devices and electromagnetic-type negative-stiffness devices, but the spring-type negative-stiffness device is a large-tonnage device that can provide negative stiffness, but the displacement stroke is insufficient and the floor space is large. The layout is not flexible; the electromagnetic negative stiffness device has a large displacement stroke but the tonnage is insuff...

AI Technical Summary

Problems solved by technology

The negative stiffness devices that have been proposed so far mainly include spring-type negative-stiffness devices and electromagnetic-type negative-stiffness devices, but the spring-type negative-stiffness device is a large-tonnage device that can provide negative stiffness, but the displacement stroke is insufficient and the floor space is large. The layout is not flexible; the electromagnetic negative stiffness device has a large displacement stroke but the tonnage is insufficient, and it is difficult to meet the needs of structural installation

In addition, the most suitable form of negative stiffness member for structural installation is the rod-type member, but there is currently no large-tonnage and long-stroke rod-type negative stiffness device that can provide negative stiffness

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