TECHNICAL FIELD

The present disclosure relates to a system for building structures, and more particularly to a damper for energy dissipation.

BACKGROUND

Earthquake occurs more and more frequently around the world. Due to the considerable impact on the building structures, the earthquake will not only impede the growth of the national economy but also seriously threaten the personal safety. Thus, extensive researches have been conducted in the civil engineering on how to construct an earthquake-resistant building. Ductility design and damping-isolating design are mostly adopted in the existing anti-seismic structures, where the ductility design usually dissipates energy through plastic hinges, which will be irreversibly damaged after an earthquake. By contrast, the damping design can dissipate energy through an energy-dissipation apparatus, and thus has desired repairability. The energy-dissipation apparatus has been extensively studied and widely used in the practical engineering, for example, the bucking-restrained brace (BRB) has been applied in the frame construction and the laminated rubber bearings between bridge griders and piers, which both play a significant role in dissipating seismic energy. In the practical application, a damper for energy dissipation will absorb the seismic energy, and thus the energy-dissipating capacity is closely associated with its seismic performance. However, most of the existing dampers have a limited energy dissipation capacity.

SUMMARY

In order to overcome the above-mentioned defects in the prior art, the disclosure provides a damper for energy dissipation, which can help the beam-column and pier connections dissipate seismic energy, facilitating the post-earthquake restoration of related structural members.

The technical solutions of the disclosure are shown as follows.

The disclosure provides a damper for energy dissipation, comprising:

a core plate;

at least four restrain plates; and at least four connecting plates;

wherein the at least four connecting plates are provided on two ends of the core plate, respectively; and the at least four restrain plates are provided on a middle of the core plate;

the core plate is provided with a first connecting hole, a second connecting hole and a third connecting hole; each of the at least four connecting plates comprises a first plate body and a second plate body connected to an end of the first plate body; a first fastener is configured to pass through the first connecting hole to connect the first plate body with the core plate; a second fastener is configured to pass through the second connecting hole to connect the second plate body with the core plate; a third fastener is configured to pass through the third connecting hole to connect each of the at least four restrain plates with the core plate; the second plate body is located between two opposite restrain plates; and symmetrical inclined gaps are provided between the at least four restrain plates and the at least four connecting plates;

the at least four connecting plates are slidable with respect to the core plate under an external force; and the at least four restrain plates are slidable with respect to the core plate to restrain an out-of-plane deformation of the core plate.

In some embodiments, the first connecting hole is a round hole; the second connecting hole and the third connecting hole are elongated holes; an extension direction of the second connecting hole is the same as that of the third connecting hole.

In some embodiments, the first fastener, the second fastener and the third fastener are all a bolt.

In some embodiments, an inner surface of each of the at least four restrain plates and an inner surface of the second plate body are both coated with a layer of a non-cohesive material.

In some embodiments, four restrain plates and four connecting plates are provided; two of the four connecting plates are symmetrically arranged at two ends of a side of the core plate; the other two of the four connecting plates are symmetrically arranged at two ends of the other side of the core plate; the two of the four connecting plates at one side of the core plate and the other two of the four connecting plates at the other side of the core plate are provided in mirror symmetry; two of the four restrain plates are symmetrically arranged at a middle of one side of the core plate; the other two of the four restrain plates are symmetrically arranged at a middle of the other side of the core plate; and the two of the four restrain plates at one side of the core plate and the other two of the four restrain plates at the other side of the core plate are provided in mirror symmetry.

In some embodiments, a longitudinal section of each of the at least four restrain plates is of an isosceles trapezoid shape; a length direction of a bottom surface of each of the at least four restrain plates is parallel to a length direction of the core plate; two inclined planes are respectively provided at two sides of the first plate body, and are parallel to waist surfaces of the two opposite restrain plates, respectively; and a gap is provided between each of the inclined planes and a waist surface of the corresponding restrain plate.

In some embodiments, the core plate is an energy-dissipation steel plate, and the at least four restrain plates are made of steel.

Compared to the prior art, the disclosure has the following beneficial effects.

In the damper provided herein, the restrain plates are configured to be slidable with respect to a core plate, so that the restrain plates can play a role in restraining the out-of-plane deformation of the core plate.

Moreover, the provision of symmetrical inclined gaps between the connecting plate and the restrain plate provides the core plate with a good deformability, and when the core plate is subjected to an axial pressure, a buckling is less likely to happen between the gaps.

