WO2002018725A1

WO2002018725A1 - Crux-bar concrete structure

Info

Publication number: WO2002018725A1
Application number: PCT/KR2001/001176
Authority: WO
Inventors: Hyun-Soo Cho
Original assignee: Kim, Kwang-Jin
Priority date: 2000-08-26
Filing date: 2001-07-10
Publication date: 2002-03-07
Also published as: KR20000072286A; KR100370587B1; AU2001271091A1

Abstract

A design and construction method to form a concrete structure using weldable steel wire or other stiff tensile members across the section of the structure with serial 'X' shape longitudinally together with net type reinforcing tensile members at both ends to combine, instead of reinforced steel bars, and pre-cast high strength panel(s) to be attached by bolting or other grip method at the angular point of the wire system to build up space to be poured of concrete later in to complete a reinforced concrete structure. This method excludes the necessity of concrete forming and also lessens the resources to be used for the conventional reinforced concrete structure of the same capacity due to the stable triangular shape formed from the compositive wire panel system.

Description

CRUX-BAR CONCRETE STRUCTURE

FIELD OF THE INVENTION

This invention relates to fabrication and installation of reinforcing bar, concrete form installation and removing, and surface finishing of concrete structure.

BACKGROUND OF THE INVENTION

1. Description of Prior Art

Fabrication and installation of reinforcing bar, concrete forming and removing, as well as pouring, finishing, and curing of the concrete is a general work sequence, without remarkable improvement so far, from centuries ago when the invention of reinforced concrete was used for structures.

2. Areas to be Improved

In prior art, the areas should be improved in construction of concrete structure can be listed as such below:

A. Re-bar congestion coming from the loads growing bigger in consideration of seismic, dynamic, and thermal analysis, etc.

B. Re-bar required for bonding development in concrete and for confining re~bar displacement such as tie-bar and stir-up etc. can be wasteful, if the bar can be tied up to a solid structure firmly.

C. Forming and dismantling, including scaffolding, to pour concrete for structure gives lot of resource increase in construction and environmental unfriendly due to the timber cutting and waste after the use.

Improvements from This Invention The present invention is provide some of improvements as listed below".

A. By forming truss across the section of the structure with

"X" shape welded wire or other stiff tensile members longitudinal together with net type reinforcing tensile members at both ends to combine (here after called "Crux-bar system") in the concrete, increased stiffness of the structure can save more re-bar required to bond development and confinement.

B. By using high strength panel (here after called "Crust panel") to tie up the Crux-bar system, the structure has many improvements as such listed below: ^~ The panels tie together the truss system to structure integration.

- The panel that forms the space to be poured of concrete and later become a part of structure, excludes forming of concrete and need not much of shoring, scaffolding, and supporting for the concrete placement.

- The pre-cast panel can give aesthetic surface of the concrete structure, thus no surface treatment requires to completion of the structure or building. - The panel as a part of the structure serves as a hard coverage can increase the water-tightness and durability of the structure.

C. Manufacturing the Crux-bar system and panel at a factory enables us the high quality and precise construction of industry.

D. This Crux-bar system is, a kind of construction modularization method that can greatly reduce the site construction period as well as environmental pollution. SUMMARY OF THE INVENTION

1. Crux-bar Arrangement

Instead of rectangular arrangement of deformed reinforcement at the sides of concrete structure buried in at the coverage depth of prior art, this present invention arranges the serially continued "X" shape weldable high-tensile bar across the section of concrete structure with projection at the triangular point to attach the Crust panel(s) to form a space where concrete can be poured later in. The "X" shape Crux-bar forms a truss structure in the concrete will increase the stiffness of the structure, thus, less resources required for the same capacity of the structure of prior art is expected. Also it is expected to save the re-bar portion required to bond development length, displace confinement, shear resisting, etc. These will benefit for the construction of high-rise concrete building especially.

2. Integration from Crust Panel Assembly to Crux-bar System

Assembly of the Crux-bar system to pre-cast high-strength Crust panel by bolting, wedging, or bonding through the holes gives the structural integration by itself to cover the construction loads of concrete pouring, thus prevent from the necessity of concrete forming and dismantling, as well as the supporting and shoring the forms of prior art. The Crust panel will form a part of the structure after the concrete poured, thus the elaborated high-strength pre-cast panel will be a hard coverage of the structure can increase the water- tightness and durability of the concrete structure.

3. Grid-net Reinforcement

If needs more stiffness of the structure in the engineering point of view, welded grid-net of horizontal, and/or vertical, and/or inclined direction can be placed at the inner side of Crust panel in assembly stage to the required level of reinforcing.

4. Finishing Structure with Multi-purpose

By using some of additional panel-type of material inside and/or outside of Crust panel using the assembly hole, various purpose of the building or structure finishing can be obtained, such as, heat insulation, aesthetic metal plate etc.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a solid view of Crux-bar system with separated parts for assembling of the crux construction compositive wire panel

Fig. 2 is a section of Crux-bar system, shows serial "X" shape of welded bar or wire with a bolt at the triangular point and net type reinforcement at both sides to combine.

Fig. 3 is a solid view of wall assembly composed of Crux-bar system and Crust panel, which is ready for concrete pouring.

Fig. 4 is a section detail of wall assembly, shows Crust panel system combined by bolting to the Crux-bar system and additional reinforcing bars inside if required.

Fig. 5 is a section of present invention for slab placement. DESCRIPTION OF THE PREFERRED EMBODIMENTS

Arrange serially continued "X" shape weldable bar 8 across the section of structure to a required height and distance, and place the projection bar 8a at the triangular point from the Crux-bar system. Assemble the reinforcing grid-net vertical 21 and horizontal 22, and/or inclined direction (not shown in drawing) on the projection bar 8, as shown in Fig. 2. The bar diameter and space of reinforcing grid-net is to be determined by responsible structural engineer in consideration of the loads and dimemsions the structure should take for.

Place Crust panel 30 on the projection bar 8a and fix it by bolting 33b, wedging, bonding, or other designed method. The holes 30a in Crust panel are to be spaced as designed to the same space of projection bar 8a. The Crust panel would be a high-strength precast concrete product or made of other similar material.

Concrete can be poured in after the Crust panels are assembled at both sides for wall as shown in Fig. 3, and at bottom side for slab as shown in Fig. 5. At inside or outside of the Crust panel some other purpose additional panel or plate can be used together with it, such as foam material, metal sheet, ceramic panel, etc.

If bolting system to fix the Crust panel to the Crux-bar system were employed in projection bar 8a, the nut can be saved after concrete hardened and the bolted projection bar 8a also can be used for other purposes, such as, fixing point for scaffolding for higher elevation construction, fixing of heat insulation panels, fixing aesthetic finishing panels, etc.

This construction method can be used for modularization of structure before the concrete pouring in.

Claims

WHAT IS CLAIMED IS:

1. A structure composed of a serial "X" shape of stiff tensile members and panel(s) to be attached at the bar projected from the triangular point of the serial "X" bar system to integrate the "X" bar system to form a space to be poured of concrete later in.

2. In the claim 1, as described above, the reinforcing members of net type placed horizontal, and/or vertical, and/or inclined direction at the inside of the panel.

3. In the claim 1, as described above, the structure using additional ρanel(s) of special purpose, such as, heat insulation, radiation plate, aesthetic ceramic tile, etc., using the projected bar from the serial "X" bar system, in, and/or between, and/or out of the panel(s), before, and/or after of concrete pouring