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Prefabricated flexible concrete frame joint structure with added hidden dampers

A technology of flexible concrete and node structures, which is applied to building components, building structures, protective buildings/shelters, etc., can solve the problems of viscoelastic damper performance, concrete structure damage, and occupied space, etc., to achieve Improve the self-recovery ability, improve the shear bearing capacity, and improve the effect of energy dissipation capacity

Active Publication Date: 2018-08-24
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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  • Prefabricated flexible concrete frame joint structure with added hidden dampers
  • Prefabricated flexible concrete frame joint structure with added hidden dampers
  • Prefabricated flexible concrete frame joint structure with added 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 a prefabricated flexible concrete frame joint structure with added hidden dampers. The prefabricated flexible concrete frame joint structure comprises concrete precast beams (1), a concrete precast column (2), an unbonded prestressed steel strand (3) and the dampers (4); and the concrete precast beams are installed on the two sides of the concrete precast column symmetrically through the four dampers correspondingly, high-strength rubber gaskets are placed at the joints of the concrete precast beams and the concrete precast column, and high-toughness fiber slurry is used for caulking. The prefabricated flexible concrete frame joint structure is reasonable in design, the metal dampers fully consumes energy through relative rotation between visco-elastic damping sheets in an earthquake, the force transmission path at the intersection of the beams and the column is changed, and the damage of a main body of a joint can be effectively reduced; the concealment of energy-consuming damper units avoids the overlap of a plastic hinge region and the main body of the joint, and the structural function can be restored only by replacing the damper units with structures damaged in the earthquake. The structure belongs to a recoverable functional structure, and the structure can recover the normal function as soon 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 Applications(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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