Replaceable steel truss-high-damping concrete laminated slab composite coupling beam

Abstract

The invention provides a replaceable steel truss-high-damping concrete laminated slab composite coupling beam. The replaceable steel truss-high-damping concrete laminated slab composite coupling beam comprises a steel pipe high-damping concrete upper chord member, a steel pipe high-damping concrete lower chord member, steel strip truss webs, two pieces of high-damping lightweight aggregate hollow cover plates which are connected through a lattice steel bar, O-shaped Q235B steel plate connecting pieces and pre-embedded pieces in steel bar concrete shearing walls. Each steel strip truss web is composed of upper and lower horizontal low-yield-steel steel strips and X-type horizontal low-yield-steel steel strips; single-layered bidirectional distributed steel bars are arranged in the high-damping lightweight aggregate hollow cover plates; the steel strip truss webs are arranged in the two pieces of high-damping lightweight aggregate hollow cover plates which are connected through the lattice steel bar, and the surfaces of the steel strip truss webs are coated with non-sticky materials; the steel pipe high-damping concrete upper chord member and the steel pipe high-damping concrete lower chord member are welded with the steel strip truss webs through the O-shaped Q235B steel plate connecting pieces. Compared with an existing replaceable connecting beam, the replaceable steel truss-high-damping concrete laminated slab composite coupling beam provided by the invention has the characteristics of strong power consumption capability and easiness for replacement.

Description

technical field [0001] The invention belongs to the field of building structures and relates to general building structures, in particular to a concrete high-rise building structure built in an earthquake zone, and in particular to a practical replaceable connecting beam with enhanced energy consumption. Background technique [0002] There are currently four types of replaceable connecting beams, namely: replaceable connecting beams with weakened sections, replaceable connecting beams with additional energy-dissipating components, steel truss connecting beams, and improved steel truss connecting beams. Replaceable coupling beams with weakened cross-sections generally have low-yield steel plates as the main body, and the weakened steel plates are prone to out-of-plane instability under large deformations; most of the deformation of the replaceable coupling beams with additional energy-dissipating parts is concentrated in the mid-span position For energy-dissipating components...

AI Technical Summary

Problems solved by technology

Replaceable coupling beams with weakened cross-sections generally have low-yield steel plates as the main body, and the weakened steel plates are prone to out-of-plane instability under large deformations; most of the deformation of the replaceable coupling beams with additional energy-dissipating parts is concentrated in the mid-span position For energy-dissipating components, its excessive vertical deformation may damage the floor above the coupling beam, which will inevitably limit its application in practical engineering; It is easy to cause joint damage or out-of-plane instability of steel members; the improved steel truss connecting beam proposed by China University of Mining and Technology retains the upper and lower chords of steel tube concrete, and changes the webs to low-yield steel webs, and the steel webs pass through the two A reinforced concrete cover slab constrains its out-of-plane deformation, and the steel web is not connected to the shear wall body, but is only connected to the chord through the ear plate; the improved steel truss connecting beam is actually not a truss structure, and should be regarded as the upper and lower chords A metal damper is sandwiched between the rods. The energy dissipation capacity of this coupling beam is much higher than that of the traditional steel truss coupling beam, but the upper and lower chords must fully bear the bending moment, shear force, and axial force of the section, which increases the The load-bearing requirements of the upper and lower chords, that is, the section of the upper and lower chords must be increased to adapt to this change

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