Shear yield energy dissipation device for preventing steel angle stiffening buckling and manufacturing method thereof

Abstract

The invention provides a shear yield energy dissipation device for preventing angle steel stiffening buckling. The shear yield energy dissipation device comprises a top plate, energy dissipation steel plates, a bottom plate, vertical stiffening steel angles, transverse stiffening steel angles, guide plates and polytetrafluoroethylene isolating layers; the energy dissipation steel plates are connected with the lower surface of the top plate and the upper surface of the bottom plate, the vertical stiffening steel angles are arranged on the front faces and the rear faces of the side edges of the energy dissipation steel plates and used for restraining bending deformation of the side edges of the energy dissipation steel plates, the transverse stiffening steel angles are arranged on the front faces and the rear faces of the middle portions of the energy dissipation steel plates and used for restraining bulge and bend deformation of the middle portions of the energy dissipation steel plates, the guide plates are arranged on the upper surface of the bottom plate and used for restraining out-of-plane displacement of the lower ends of the vertical stiffening steel angles, and the polytetrafluoroethylene isolating layers are attached to the side faces, making contact with the energy dissipation steel plates, of the vertical stiffening steel angles and the transverse stiffening steel angles. The shear yield energy dissipation device for preventing angle steel stiffening buckling has the advantages of being high in ductility, good in fatigue property and good in energy dissipation performance and has good application prospects, the buckling preventing scheme is stable and continuous, and the hysteretic curve is full.

Description

technical field [0001] The invention belongs to the energy dissipation shock absorption and vibration control technology of engineering structures, and relates to an angle steel stiffened anti-buckling shear yield type energy dissipation device and a manufacturing method thereof. Background technique [0002] At present, almost all engineering circles design shear yielding energy dissipators from the perspective that shear elastic buckling does not precede shear yielding. This kind of elastic buckling load is used as the limit state of bearing capacity: on the one hand, the strength of the steel plate after buckling cannot be fully utilized, resulting in The waste of steel plate material reduces the economic performance of the energy dissipator; on the other hand, in the past 30 years, experimental research has shown that the buckling of the thin steel plate does not mean the loss of bearing capacity, and the failure of the component is controlled by the ultimate strength of ...

AI Technical Summary

Problems solved by technology

Whether it is cross stiffening or cross stiffening, welding processing will inevitably produce residual stress and residual deformation, which will affect the mechanical properties of the steel plate

Because the steel plate is thin, it is easy to "burn through" during welding, and there are inevitably defects such as cracks and inclusions in a large number of welded parts. Under the action of reciprocating load, the cracks are easy to expand rapidly and brittle fracture occurs soon, which reduces the ductility of the steel plate.

Secondly, the stiffener is prone to local buckling and reduces the stiffening efficiency of the stiffener, repeated local buckling accelerates the fracture of the stiffener, and eventually loses the stiffening effect

[0004] Open vertical seams on the steel plate to change the overall shear deformation of the steel plate into the bending deformation of the columns between the seams, thereby improving the ductility of the plate, but the construction process is more complicated

Due to the division of the steel plate, the path of the tension field is not smooth, and it is difficult to form a complete tension field, so the bearing capacity provided is limited

Secondly, the vertical joints greatly weaken the stiffness and bearing capacity of the steel plate, and generally cannot work alone as the main anti-lateral force system of the structure, and its hysteretic curve presents obvious shear-slip characteristics

At the same time, making vertical seams on the steel plate will greatly increase the production cost, and make the analysis parameters of the steel plate various, and the design method is more complicated

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