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Fabricated flexible concrete frame joint structure with hidden dampers

A flexible concrete and node structure technology, applied in building components, building structures, protective buildings/shelters, etc., can solve problems such as the impact of viscoelastic damper performance, damage to concrete structures, and the impact of occupied space. The effect of improving self-recovery capacity, improving shear bearing capacity and improving energy dissipation capacity

Active Publication Date: 2021-05-04
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing studies have shown that the prefabricated flexible frame joints have the following problems: the structure equipped with energy-dissipating damping elements is inconvenient for construction, and the occupied space affects the normal use of the building, etc.
If the support or damper is poured inside the building structure, it will easily cause structural cracking, and the concrete structure will still be damaged in an earthquake; if it is arranged indoors, it will take up a lot of space, and it will be arranged outdoors. The performance of viscoelastic dampers will be affected by temperature changes

Method used

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  • Fabricated flexible concrete frame joint structure with hidden dampers
  • Fabricated flexible concrete frame joint structure with hidden dampers
  • Fabricated flexible concrete frame joint structure with hidden dampers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Concrete prefabricated beams with dimensions of 4000mm×450mm×700mm and concrete prefabricated columns of 700mm×700mm×3200mm are directly delivered to the site for dry assembly, such as Figure 1a As shown, the concrete prefabricated beam 1 and the concrete precast column 2 are placed flat on the ground in the shape of a "ten"; by installing high-strength bolts 11 and the positions of the bolt holes at the joints of the beams and columns, the positions of the bolt holes are arranged along the intersection of the beams and columns, and all The bolt hole is 125mm away from the beam-column intersection, and the installation specification is a damper 4 with a radius R of 115mm and a fan plate and friction plate width of 45mm, and the positioning high-strength bolt 5 is tightened, and the tightening force is about half of the design pretension; Prestressed steel strands with a specification of 9-7Φ5 are penetrated into the reserved channel of the pipe to form a flexible self-r...

Embodiment 2

[0038] Concrete prefabricated beams 1 and 1200mm×1200mm×4500mm concrete prefabricated beams 1 and 1200mm×1200mm×4500mm concrete prefabricated beams 1 with dimensions of 8000mm×650mm×1000mm are directly delivered to the site for dry assembly, such as Figure 1a As shown, the concrete prefabricated beams and concrete prefabricated columns are placed flat on the ground in the shape of a "ten"; by installing high-strength bolts 11 and positioning bolt holes at the joints of beams and columns, the bolt holes are arranged along the intersection of beams and columns, and all bolt holes 180mm away from the beam-column intersection, install a damper with R of 170mm, fan plate and friction plate width of 75mm, and tighten the positioning high-strength bolt 5, the tightening force is about half of the design pre-tensioning force; reserve a hole in the metal bellows The prestressed steel strand 3 with a specification of 12-7Φ5 is penetrated into the tunnel, so that it can be stressed as a ...

Embodiment 3

[0044] Concrete prefabricated beams 1 and 400mm×400mm×2500mm concrete prefabricated beams 1 and 400mm×400mm×2500mm concrete prefabricated columns 2 are directly delivered to the site for dry assembly, such as Figure 1a As shown, the prefabricated concrete beams and prefabricated concrete columns are placed flat on the ground in the shape of a "ten"; by installing high-strength bolts 11 and the position of the positioning bolt holes at the contact of the beams and columns, the positions of the bolt holes are arranged along the intersection of the beams and columns, and all the bolt holes The distance from the beam-column intersection is 105mm, install the damper 4 whose R is 95mm, the width of the fan plate and the friction plate is 40mm, and tighten the positioning high-strength bolt 5, and its tightening force is about half of the design pre-tension force; The prestressed steel strand 3 with a specification of 9-7Φ5 is penetrated into the tunnel, so that it can be stressed as...

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Abstract

The invention discloses an assembled flexible concrete frame node structure with a hidden damper, which includes a concrete prefabricated beam (1), a concrete prefabricated column (2), unbonded prestressed steel strands (3), a damper ( 4); The two sides of the precast concrete column are respectively symmetrically installed with precast concrete beams through four dampers, and high-strength rubber gaskets are placed at the joints of the precast concrete beams and precast concrete columns, and high-toughness fiber slurry is used to fill seam. The design of the invention is reasonable, and the metal damper fully consumes energy through the relative rotation between the viscoelastic damping sheets during an earthquake, which changes the force transmission path at the intersection of beams and columns, and can effectively reduce the damage of the node main body; the energy dissipation damper unit Hiding avoids the coincidence of the plastic hinge area and the main body of the node, and only needs to replace the damper unit of the earthquake-damaged structure to restore the structural function. The structure belongs to the recoverable functional structure, which can restore the function of normal use as quickly as possible after the earthquake.

Description

technical field [0001] The invention relates to the field of structural engineering, in particular to a node structure between prefabricated components of an assembled flexible frame in a building structure. Background technique [0002] Construction industrialization is characterized by the development of the construction industry in various countries: standardization of component design, factory production, mechanization of construction and scientific management. Prefabricated concrete structure is a structural type that conforms to industrial production methods. At present, the most mature technology and has entered the stage of practical application is the "wet connection" node, which has basically reached the level of cast-in-place concrete structure in terms of mechanical performance, especially energy dissipation capacity, but due to the "wet connection" node in During the construction process, there was secondary cast-in-place, and the narrow working space of the po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/21E04B1/98E04H9/02
CPCE04B1/21E04H9/021
Inventor 马钢都思哲张玉王志勇武瑛
Owner TAIYUAN UNIV OF TECH
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