Self-resetting steel structure beam-column aseismatic joint based on shape memory alloy ring spring set

Abstract

The invention discloses a self-resetting steel structure beam-column aseismatic joint based on a shape memory alloy ring spring set. The self-resetting steel structure beam-column aseismatic joint comprises H-shaped steel beam-columns and a joint region used for connecting the H-shaped steel beam-columns, each H-shaped steel beam-column comprises an H-shaped steel beam and an H-shaped steel column, and the beam end of each H-shaped steel beam sticks close to a front flange of the corresponding H-shaped steel column through an end plate, so that the H-shaped steel beams and the H-shaped steel columns are placed in a mutually perpendicular manner. The joint region comprises a first ring spring set, a second ring spring set, a third ring spring set, a fourth ring spring set, a fifth ring spring set, a sixth ring spring set, a seventh ring spring set, an eighth ring spring set, a first high-strength bolt, a second high-strength bolt, a third high-strength bolt, a fourth high-strength bolt, a fifth high-strength bolt, a sixth high-strength bolt, a seventh high-strength bolt, an eighth high-strength bolt, an upper-side end plate reinforcing rib, a lower-side end plate reinforcing rib, the end plate, an upper-side first column reinforcing rib, an upper-side second column reinforcing rib, a lower-side first column reinforcing rib and a lower-side second column reinforcing rib. The self-resetting steel structure beam-column aseismatic joint is simple in form and is stressed reasonably.

Description

technical field [0001] The invention belongs to the technical field of anti-seismic and shock-absorbing technology of structural engineering, and relates to an anti-seismic joint of beams and columns, in particular to an anti-seismic joint of beams and columns capable of consuming energy during an earthquake and self-resetting after an earthquake. Background technique [0002] Although the strength and ductility of traditional steel beam-column joints are good, the permanent deformation caused by moderate or strong earthquakes makes the repair process extremely cumbersome. If the permanent deformation is too large, the possibility of repair may even be lost, forcing the demolition of the entire structure. In order to reduce the permanent deformation of joints after earthquakes, one of the latest techniques is to use the superelastic properties of shape memory alloy bolts to strengthen beam-column joints. Superelasticity, that is, when the material is subjected to stress in ...

AI Technical Summary

Problems solved by technology

While the possibility of fracture can be reduced by increasing the diameter ratio of the threaded section to the smooth section, doing so can result in a large amount of material remaining during machining, resulting in waste

If the bolt slenderness ratio is too large, it will be very difficult to apply the preload

Also, shape memory alloy bolts are suitable for tension and not for shear, thus requiring additional shear components

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