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Detachable assembled high-ductility steel-concrete composite beam

A high ductility, concrete technology, applied in the direction of structural elements, building components, elongated structural components used for load-bearing, etc., can solve the problems that hinder the industrialization level of engineering structures, the full life cycle design, the poor ductility of the shear connection structure, the construction process It can improve the ductility, seismic energy dissipation and anti-collapse ability, avoid dust on the construction site, and achieve the effect of low cost

Inactive Publication Date: 2017-12-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the concrete floor structure, as one of the main horizontal force-bearing components, is still mainly constructed by cast-in-place construction. Not only is the construction speed slow, the construction process and structure are complicated, but it also seriously hinders the further improvement of the industrialization level of engineering structures and the full life cycle. realization of the design
Although there are a small number of engineering practices that drill holes in concrete floors and use expansion bolts to connect steel beams, this method is usually used to strengthen existing structures, and the ductility of the shear connection structure is poor, and the earthquake resistance and collapse resistance of the structure weaker

Method used

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  • Detachable assembled high-ductility steel-concrete composite beam
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  • Detachable assembled high-ductility steel-concrete composite beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 1 to Figure 3 The illustrated embodiment 1: the present invention is a detachable assembly type high ductility steel-concrete composite beam, the precast concrete floor 2 is a solid reinforced concrete slab; Horizontal distribution of steel bars 402, bottom longitudinal bars 403 and top longitudinal bars 404; the bolt set 3 includes nuts 301, bolt rods 302, embedded nuts 303 and mounting nuts 304;

[0040] Two rows of bolt rods 302 are pre-embedded at the bottom of the precast concrete floor 2; a row of bolt holes is reserved in the middle of the extensions on both sides of the upper flange of the steel beam 1, and the position of the reserved bolt holes on the upper flange of the steel beam 1 is the same as that of the precast concrete floor 2. The positions of the embedded bolt sets 3 correspond to each other, and the bottom of the embedded nut 303 is flush with the bottom of the precast concrete floor 2;

[0041] The position of the reserved bolt hol...

Embodiment 2

[0043] Such as Figure 4 The shown embodiment 2: the present invention is a detachable assembly type high ductility steel-concrete composite beam, the precast concrete floor 2 is a hollow reinforced concrete slab; Horizontally distributed reinforcing bars 402, bottom longitudinal bars 403 and top longitudinal bars 404; the bolt set 3 includes nuts 301, bolt rods 302 and mounting nuts 304;

[0044] Two rows of bolt rods 302 are pre-embedded at the bottom of the precast concrete floor 2; a row of bolt holes is reserved in the middle of the extensions on both sides of the upper flange of the steel beam 1, and the position of the reserved bolt holes on the upper flange of the steel beam 1 is the same as that of the precast concrete floor 2. The positions of the inner pre-embedded bolt sets 3 correspond to each other, and each bolt rod 302 is simultaneously connected to the bottom transversely distributed reinforcing bars 401 and the top transversely distributed reinforcing bars 40...

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Abstract

The invention discloses a detachable assembled high-ductility steel-concrete composite beam and belongs to the technical field of steel structures of structural engineering. A steel beam and a precast concrete floor are assembled through bolts. Bolt holes are reserved in the upper wing edge of the I-shaped steel beam, the bolts are pre-buried at the bottom of the precast concrete floor and welded or mechanically connected with transverse steel bars at the bottom, so that the ductility and the anti-collapse capability of the structure are improved under the action of a strong shock. During assembly, the precast concrete floor is built at the top of the upper wing edge of the I-shaped steel beam, the bolts pre-buried at the bottom of the precast concrete floor penetrate the bolt holes reserved at the upper wing edge of the steel beam, and then the steel beam and the floor are fastened by nuts. When the service life of the structure is up, the bolts are unscrewed and the precast floor and the steel beam are separated to realize disassembly. The novel composite beam has the advantages of a traditional cast-in-place composite beam, is simple in assembly construction, high in speed and low in cost, and can effectively prevent dust raising on a construction site; post-earthquake repair and replacement of damaged members are facilitated; and the detachable assembled high-ductility steel-concrete composite beam can be detached in the service period or after service termination, and has a wide engineering application prospect.

Description

technical field [0001] The invention belongs to the technical field of structural engineering steel structures, in particular to a detachable and assembled high ductility steel-concrete composite beam. Background technique [0002] The development and application of new fabricated steel structure systems are of great significance to the development of structural engineering industrialization. The existing steel structure system has a high degree of industrialization, and the main components are usually made of hot-rolled steel products or welded cross-section components made by factories; the components can be connected by high-strength bolts or welded on site at the construction site. However, the concrete floor structure, as one of the main horizontal force-bearing components, is still mainly constructed by cast-in-place construction. Not only is the construction speed slow, the construction process and structure are complicated, but it also seriously hinders the further i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/293
CPCE04C3/293
Inventor 班慧勇石永久施刚王元清
Owner TSINGHUA UNIV
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