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Doughtnut-shaped hollow core body, bidirectional hollow core slab using the same, and construction method thereof

a hollow core and doughnut technology, applied in the field of light weight, can solve the problems of low structural resistance of the slab, inability to apply one-way hollow core slabs to buildings, and lack of design changes and additional costs, and achieve the effect of simplifying the arrangement of the slab steel bars

Inactive Publication Date: 2013-02-14
IUCF HYU (IND UNIV COOP FOUND HANYANG UNIV) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a method for constructing a bidirectional hollow core slab with stable resistance characteristics and simplified arrangement work of steel bars. The hollow core bodies are located between the upper and lower steel bars to ensure quality construction. The slab concrete is filled into the hollow portions of the doughnut-shaped hollow core bodies to improve the unification of the upper and lower portions and reinforce the slab's structure. The hollow core bodies are fixed in place by the steel bar cages or spacers, which serve as both shear steel bars and position fixers in the slab concrete. The distributing bars of the upper and lower steel bars are advanced coupled to the steel bar cages or spacers, simplifying the arrangement work of the slab steel bars.

Problems solved by technology

Most of the slabs of buildings such as apartment houses show bidirectional (two-way) movements, thereby making it impossible to apply one-way hollow core slabs to the buildings, without having any design changes and additional costs.
In this case, however, the structural resistance of the slab becomes low.

Method used

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  • Doughtnut-shaped hollow core body, bidirectional hollow core slab using the same, and construction method thereof
  • Doughtnut-shaped hollow core body, bidirectional hollow core slab using the same, and construction method thereof
  • Doughtnut-shaped hollow core body, bidirectional hollow core slab using the same, and construction method thereof

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Embodiment Construction

[0025]According to a first aspect of the present invention, there is provided a hollow core body that is adapted to be buried into concrete for the construction of a lightweight concrete member, having a hollow portion with a circular section formed in the center thereof and corners rounded with curved surfaces, thereby providing a generally doughnut-shaped outer case.

[0026]According to a second aspect of the present invention, there is provided a bidirectional hollow core slab including:

[0027]steel bar cages each having first and second side bent bars, an upper bent bar, and first and second end tilt bars; doughnut-shaped hollow core bodies spacedly arranged in rows and columns in such a manner as to be restrained in the steel bar cages by means of fitting slots formed on both sides facing each other; slab lower steel bars arranged beneath the steel bar cages; slab upper steel bars arranged on the steel bar cages; and slab concrete cast and cured to a thickness through which the sl...

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Abstract

The present invention relates to a lightweight bidirectional hollow core slab, and a doughnut-shaped hollow core body which may be advantageously used in the construction of a bidirectional hollow core slab. The doughnut-shaped hollow core body according to the present invention includes an outer case formed in a generally doughnut shape, wherein a hollow portion with a circular section is formed in the center thereof and corners are rounded with curved surfaces. The bidirectional hollow core slab according to the present invention is made by stably locating the doughnut-shaped hollow core bodies in concrete in such a manner that the doughnut-shaped hollow core body is restrained and mounted in steel bar cages or on the upper and lower steel bars.

Description

TECHNICAL FIELD [0001]The present invention relates to a lightweight bidirectional hollow core slab that is made by arranging a plurality of hollow core bodies between upper and lower steel bars in a form of a matrix in horizontal and vertical directions thereof and by burying the hollow core bodies into concrete, thereby providing bidirectional resistance characteristics. More particularly, the present invention relates to a doughnut-shaped hollow core body advantageously used for a bidirectional hollow core slab, the bidirectional hollow core body using the doughnut-shaped hollow core body, and a construction method of the bidirectional hollow core body.BACKGROUND OF INVENTION[0002]A hollow core slab has hollow cores formed on the center thereof, which provide more excellent sectional performance than the self weight and are advantageous in the reduction of the noise between floors.[0003]In view of the light weight of the slab, one of slab systems used for current buildings is one...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E04C2/06E04C5/01E04B1/62E04C2/22E04B5/36E04C2/34
CPCE04B5/328E04B5/326E04C5/163E04B5/36E04B5/43E04B5/38
Inventor LEE, SEUNG CHANGOH, JEONG KEUNCHOI, CHANG SIKCHOI, HYUN KI
Owner IUCF HYU (IND UNIV COOP FOUND HANYANG UNIV)
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