KR20150000223A - Prestressed i beam - Google Patents

Prestressed i beam Download PDF

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Publication number
KR20150000223A
KR20150000223A KR20130072402A KR20130072402A KR20150000223A KR 20150000223 A KR20150000223 A KR 20150000223A KR 20130072402 A KR20130072402 A KR 20130072402A KR 20130072402 A KR20130072402 A KR 20130072402A KR 20150000223 A KR20150000223 A KR 20150000223A
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KR
South Korea
Prior art keywords
lower flange
fixed
tensional
web
flange
Prior art date
Application number
KR20130072402A
Other languages
Korean (ko)
Inventor
김현수
박재홍
진승영
김진석
Original Assignee
주식회사 네비엔
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 네비엔 filed Critical 주식회사 네비엔
Priority to KR20130072402A priority Critical patent/KR20150000223A/en
Publication of KR20150000223A publication Critical patent/KR20150000223A/en

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
    • E04C3/294—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete of concrete combined with a girder-like structure extending laterally outside the element
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices

Abstract

Provided is a prestressed I-beam comprising: a main body (300) which has an upper flange (310), a lower flange (320), and a web (330); a first tendon (400) of which one end is fixed to one end of the lower flange (320) through a first movable fixture (410) and the other end is fixed to a position separated from the other end of the lower flange (320) through a first fixed fixture (420); and a second tendon (500) of which the other end is fixed to the other end of the lower flange (320) through a second movable fixture (510) and one end is fixed to a position separated from one end of the lower flange (320) through a second fixed fixture (520). Thereby, the present invention has excellent construction performance, reduces tension loss caused by curvature friction, and reduces reinforcing bars in a fixing part.

Description

PS I beam {PRESTRESSED I BEAM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction field, and more particularly, to a structure of a PS I beam.

Figs. 1 to 3 show drawings of Patent No. 10-547619.

1, the PS I beam according to the prior art comprises a steel I beam constituted by an upper flange 190 and a lower flange 191, a lower I-beam of a lower concrete 191 covered with a lower flange 191 of a steel I beam, (160), and a tensile material (170) buried in the lower concrete (160).

As shown in FIGS. 2 and 3, two tension members 270 and 280 are installed on both sides of the web 190, respectively.

The first torsion members 170 of the two torsion members are fixed by a movable fixing member and a fixed fixing member respectively formed at both ends of the girder and the second torsion member 270 is fixed by a movable fixing member formed at a position spaced apart from both ends of the girder, And is fixed by an anchor.

Such a conventional structure has the following problems.

In the case of the movable fastening orifice, a portion of the second tensional material 270 in the narrow space between the upper flange 190 and the lower concrete 160 may be formed in a narrow space between the upper flange 190 and the lower concrete 160, So that the workability is not good.

Further, since such a work area is a space separated by the web 190, it is difficult to perform the simultaneous tension operation. If the simultaneous tension operation is performed, simultaneous work must be performed by two equipments. Therefore, the work is very troublesome and the same tension is applied it's difficult.

Second, since the both ends of the second tensional material 270 are exposed on the upper surface of the lower concrete 160 and the deep portion thereof is embedded in the lower concrete 160, the loss of the tensional force due to the curvature friction is large, The amount of reinforcing bars of the fixing portion must be large in order to stably maintain the curved structure.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a PS I beam which is excellent in workability, less in tension loss due to curvature friction, and capable of reducing a reinforcing bar of a fixing part .

In order to solve the above-mentioned problems, the present invention includes a main body 300 having an upper flange 310, a lower flange 320 and a web 330; One end of which is fixed to one end of the lower flange 320 by a first movable fixing member 410 and the other end of which is fixed by a first fixed fixing member 420 at a predetermined spacing from the other end of the lower flange 320 A first taut material 400; The other end of which is fixed to the other end of the lower flange 320 by a second movable fixing member 510 and the other end of which is fixed by a second fixed fixing member 520 at a position spaced apart from one end of the lower flange 320 And a second prestressing material (500).

The position of the fixing fixation port 420 of the first tensional material 400 and the position of the second fixing fixation port 520 of the second tensed material 500 are preferably symmetrical with respect to the central portion of the main body 300.

The first fixing fixation port 420 and the second fixing fixation port 520 are preferably formed on the upper surface of the lower flange 320.

The first tension member 400 and the second tension member 500 are fixed to the left side of the lower flange 320 about the web 330 and the second tension member 500 is fixed to the lower flange 320 about the web 330. [ The third tensions 600 and the fourth tensions 700 may be fixed to the right side of the first tensions 400 and the second tensions 500, respectively.

The other end portion of the first tensional material 400 and the one end portion of the second tensional material 500 are disposed in a convex parabolic shape downward and the first end portion of the first tensional material 400 and the second end portion of the second tensional material 500 And the other end portions are arranged in a straight line.

The first tensions 400 and the second tensions 500 may be disposed to cross each other at a central portion of the main body 300.

It is preferable that the upper flange 310 and the web 330 are formed of an I-shaped steel and the lower flange 320 is formed of a composite structure of an I-shaped steel and a reinforced concrete.

The upper flange 310, the lower flange 320, and the web 330 are preferably formed of a reinforced concrete material.

The present invention proposes a PS I beam which is excellent in workability, less in tension loss due to curvature friction, and capable of reducing the reinforcing bars of the fusing part.

Figures 1 to 3 illustrate an I beam according to the prior art,
1 is a side view;
2 is a longitudinal sectional view.
3 is a cross-sectional view;
FIG. 4 and the following illustrate an embodiment of the present invention,
4 is a longitudinal sectional view of the first embodiment.
5 is a cross-sectional view of the first embodiment;
6 is a cross-sectional view of the second embodiment;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4, the PS I beam according to the present invention basically comprises a body 300 having an upper flange 310, a lower flange 320 and a web 330; One end of which is fixed to one end of the lower flange 320 by a first movable fixing member 410 and the other end of which is fixed by a first fixed fixing member 420 at a predetermined spaced position from the other end of the lower flange 320, A tension member 400; And the other end is fixed to the other end of the lower flange 320 by a second movable fixing member 510 and the other end of the second flange 320 is fixed by a second fixed fixing member 520 at a predetermined spaced position from one end of the lower flange 320, And a tension member 500.

A first tensional material 400 and a second tensional material 500 are disposed on one side lower flange 320 of the web 330. One end of the first tensional material 400 is disposed on one end of the lower flange 320, And the other end of the second tension member 500 is fixed to the lower flange 320 at a predetermined spaced distance from the other end of the lower flange 320 by the first fixing fixture 420, And the other end of the lower flange 320 is fixed to the other end of the lower flange 320 by a second fixed fixing hole 520 at a predetermined spaced distance from the other end of the lower flange 320.

In other words, one end portion of the first tensional element 400 and the second tensional element 500 are fixedly fixed to the middle portion of the lower flange 320 and the other end thereof is fixed to the end portion of the lower flange 320 .

This makes it possible to obtain the following effects in comparison with the prior art.

Since both the first tensions 400 and the second tensions 500 have a fixed fixing hole at the middle portion of the lower flange 320 in the narrow space between the upper flange 190 and the lower concrete 160, It is not necessary to perform the tensioning work of the lower concrete 160, and it is possible to perform the tension work in the movable fixing holes formed at the both ends of the lower concrete 160, and excellent workability can be obtained.

The first tensile material 400 and the second tensile material 500 are fixed on the left side of the lower flange 320 around the web 330 and on the right side of the lower flange 320 around the web 330, It is preferable for the structural stability to adopt a configuration in which the third tensile material 600 and the fourth tensile material 700 are fixed with the same structure as the tensile material 400 and the second tensile material 500, respectively.

In this case, the tension and the fixing operation of the first tensional material 400 and the third tensional material 600 are performed at one side end of the lower flange 320 and the second tensional material 500 and the second tensional material 500 at the other end of the lower flange 320 The tension of the fourth tensional material 700 and the fixing operation of the fourth tensional material 700 can be performed. Therefore, unlike the prior art, there is added an advantage that simultaneous tensioning of two tension members is easy and the same tension force is easily applied.

The position of the fixed fixing port 420 of the first tensed material 400 and the position of the second fixed fixing port 520 of the second tensed material 500 are preferably symmetrical with respect to the central portion of the main body 300 in terms of structural stability .

The first fixing fixture 420 and the second fixing fixture 520 may be disposed on the upper surface of the lower flange 320. The first fixing fixture 420 and the second fixing fixture 520 may be disposed at the middle portion of the lower flange 320, And other structural efficiency.

The other end of the first tensional material 400 and the other end of the second tensional material 500 are arranged in a convex parabolic shape downward and the one end portion of the first tensional material 400 and the other end portion of the second tensional material 500 are arranged in a straight line As shown in FIG.

Since the present invention can take such a structure, the advantage of being able to reduce the amount of the reinforcing bars of the fusing part for the stable maintenance of the curved structure and the loss of the torsional force due to the curvature friction is smaller than the conventional one.

The first tensional element 400 and the second tensional element 500 may have a structure that is spaced apart from each other at a central portion of the main body 300 (Fig. 5) and arranged to cross each other (Fig. 6) .

The upper flange 310 and the web 330 are formed of an I-shaped steel and the lower flange 320 is applied to a composite beam formed by a composite structure of an I-shaped steel and a reinforced concrete And the upper flange 310, the lower flange 320 and the web 330 can be effectively applied to a general beam formed by a reinforced concrete material.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

300: main body 310: upper flange
320: Lower flange 330: Web
400: first tautener 410: first movable fastener
420: first fixing fixture 500: second tension member
510: second movable fixation port 520: second fixed fixation port
600: third tensile material 700: fourth tensile material

Claims (8)

A body 300 having an upper flange 310, a lower flange 320, and a web 330;
One end of which is fixed to one end of the lower flange 320 by a first movable fixing member 410 and the other end of which is fixed by a first fixed fixing member 420 at a predetermined spacing from the other end of the lower flange 320 A first taut material 400;
The other end of which is fixed to the other end of the lower flange 320 by a second movable fixing member 510 and the other end of which is fixed by a second fixed fixing member 520 at a position spaced apart from one end of the lower flange 320 A second tautening material 500;
≪ / RTI > The method according to claim 1,
The position of the fixing fixation port 420 of the first tensional material 400 and the position of the second fixing fixation port 520 of the second tensional material 500 are symmetrical with respect to the central portion of the main body 300 PS I beam. The method according to claim 1,
Wherein the first stationary fixation port (420) and the second stationary fixation port (520) are formed to be exposed on an upper surface of the lower flange (320). The method according to claim 1,
The first tensile member 400 and the second tensile member 500 are fixed to the left side of the lower flange 320 about the web 330,
A third tensile material 600 and a fourth tensile material 700 are formed on the right side of the lower flange 320 around the web 330 in the same structure as the first tensile material 400 and the second tensile material 500, / RTI > wherein the PS I beam is fixed. The method according to claim 1,
The other end portion of the first tensional material 400 and the one end portion of the second tensional material 500 are arranged in a convex parabolic shape downward,
Wherein one end of the first tensional material (400) and the other end of the second tensional material (500) are arranged in a straight line. The method according to claim 1,
Wherein the first tensional material (400) and the second tensional material (500) are arranged to cross each other at a central portion of the main body (300). The method according to claim 1,
The upper flange 310 and the web 330 are formed of an I-shaped steel,
Wherein the lower flange (320) is formed by a composite structure of an I-shaped steel material and a reinforced concrete. The method according to claim 1,
Wherein the upper flange (310), the lower flange (320), and the web (330) are formed from a reinforced concrete material.
KR20130072402A 2013-06-24 2013-06-24 Prestressed i beam KR20150000223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20130072402A KR20150000223A (en) 2013-06-24 2013-06-24 Prestressed i beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20130072402A KR20150000223A (en) 2013-06-24 2013-06-24 Prestressed i beam

Publications (1)

Publication Number Publication Date
KR20150000223A true KR20150000223A (en) 2015-01-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200004129A (en) * 2018-07-03 2020-01-13 이일우 Strengthening method of concrete structures by pretensioning

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200004129A (en) * 2018-07-03 2020-01-13 이일우 Strengthening method of concrete structures by pretensioning

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