KR890005053Y1 - Triangle steel bar of p.c. concrete - Google Patents
Triangle steel bar of p.c. concrete Download PDFInfo
- Publication number
- KR890005053Y1 KR890005053Y1 KR2019860004079U KR860004079U KR890005053Y1 KR 890005053 Y1 KR890005053 Y1 KR 890005053Y1 KR 2019860004079 U KR2019860004079 U KR 2019860004079U KR 860004079 U KR860004079 U KR 860004079U KR 890005053 Y1 KR890005053 Y1 KR 890005053Y1
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- South Korea
- Prior art keywords
- concrete
- steel wire
- steel
- screw
- steel bar
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
- E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
내용 없음.No content.
Description
제1(a)도는 P.C강선의 측면도, 제1(b)도는 등단면도.Fig. 1 (a) is a side view of the P.C steel wire, and Fig. 1 (b) is an isometric view.
제2(a)도는 본 고안의 측면도, 제2(b)도는 동확대 단면도.2 (a) is a side view of the present invention, 2 (b) is a magnified cross-sectional view.
제3도는 본 고안의 사시도(일부 생략).3 is a perspective view (some omitted) of the present invention.
제4도는 사용 상태 예시도.4 is an exemplary state of use.
제5도는 근사 삼각형상의 냉간단조롤의 구성도.5 is a block diagram of a cold forging roll of the approximate triangle shape.
제6도는 스크류 나사 성형 다듬빌롤의 구성도.6 is a block diagram of a screw thread forming finish roll.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 근사 삼각형 2 : 만곡면1: approximate triangle 2: curved surface
3: 원호면 4 : 삼등분 스크류 나사3: arc surface 4: third screw screw
본 고안은 P.C콘크리트(Prestressed Concrete)용 비원형 강봉에 관한 것이다.The present invention relates to a non-circular steel bar for P.C concrete (Prestressed Concrete).
토목 건축 분야에서의 콘크리트의 보강용 비원형 단면의 강봉은 다수가 알려져 있다.Many steel rods of non-circular cross section for reinforcement of concrete in the field of civil construction are known.
이들 비원형 강봉중에 콘크리트와의 결합력을 높이기 위한 강봉 주벽면의 돌기부를 제외하면 단면이 원형인 것은 U. S Patent 2, 374, 8272, 377, 980 이며, 강봉 주벽면의 돌기부가 암나사와 대응 관계로 되어 스리브로 강봉을 연결할 수 있게 된 것은 U. S Patent 3, 782, 839, 3, 561, 185이다.Among these non-circular steel bars, U. S Patent 2, 374, 8272, 377, and 980 have a circular cross section except for protrusions on the main wall of the steel rod to increase the bonding force with concrete. It becomes U. S Patent 3, 782, 839, 3, 561, 185 to be able to connect the steel bar to the rib.
또한, 이들과는 달리 강봉의 돌기부를 제외한 단면모양이 비원형이며, 강봉 주벽면의 돌기부가 암나사에 대응하게 된 것으로 특허공보 81-214를 예로 들을 수 있다.Moreover, unlike these, the cross-sectional shape except the protrusion part of a steel rod is non-circular, and the protrusion part of the steel rod main wall surface corresponds to a female screw, for example, patent publication 81-214 can be mentioned.
상기한 비원형 강봉들은 모두가 고온 프레스된 소재 강봉을 캘리버(Caliber)를 가진 한쌍의 다듬질 로울(finishing roll)사이를 통과시켜 단면 향상을 압연성형하는 것이다.The non-circular steel bars are all rolled through a hot pressed material rod between a pair of finishing rolls with a caliber to roll the cross-sectional enhancement.
그러나 고인 장력이 요구되는 P.C 콘크리트에서는 상기와 같은 강봉은 사용할 수 없는 것이고, 탄소함유량 0.62-0.92%의 선재를 AC3(950℃)에서 오스테나이트화 하고 550℃의 납욕(Lead Bath)속에서 냉각시켜 균일한 Sorbite 조직을 갖는 (Lead Patenting처리)고인장 강선을 사용하게 된다.However, such steel bar cannot be used in PC concrete which requires high tension.The carbon steel wire of 0.62-0.92% is austenitic at AC3 (950 ℃) and cooled in lead bath at 550 ℃. High tensile steel wire with uniform Sorbite structure (Lead Patenting treatment) is used.
상기한 고인장 강선(이하 P.C강선이라 한다)은 주벽면이 매끈한 원주면으로서, 다시 고온 프레스 공정을 거치게 되면 인장력이 감소되어 P.C강선으로서 기능을 잃게 되므로 그대로 콘크리트 보강용으로 사용된다.The high tensile steel wire (hereinafter referred to as P.C steel wire) is a smooth circumferential surface of the main wall, and when subjected to a high-temperature press process, the tensile force is reduced to lose its function as a P.C steel wire, so it is used for concrete reinforcement.
이러한 P.C강선의 단점은 콘크리트와의 접합이 좋지 않고 강선의 양단에 인장력을 가한 상태에서 콘크리트내에 매입 고정되므로 강선의 양단 고정부에 강선의 피로가 집중 되며, P.C강선의 고정 금구를 사용해야 하는 점 등이다.The disadvantages of these PC steel wires are that they are poorly bonded to concrete and embedded in concrete with tension applied to both ends of the steel wires, so the fatigue of the steel wires is concentrated on both ends of the steel wires. to be.
본 고안은 상기한 P.C강선의 주벽면에 적절한 돌기를 구비시켜 콘크리트와의 접착 효율을 증대시킴으로써 P.C강선양단에 피로도가 집중되지 않게 하며, P.C강선 주벽면의 돌기가 암나사에 대응되게 함으로써 P.C강선의 고정금구를 간단한 너트로 대체 할 수 있으며, 보다 중요한 것은 P.C강선은 냉간 압연으로 근사 삼각형화하는 과정에서 냉간 단조되어 인장강도가 증대되며, P.C강선 주면상의 암나사에 대응한 나사돌조를 형성하기 용이하게 한 것이다.The present invention provides suitable projections on the main wall of the PC steel wire to increase adhesion efficiency with concrete so that fatigue is not concentrated on both ends of the PC steel wire, and the projections on the main wall of the PC steel wire correspond to female threads. The fixing bracket can be replaced by a simple nut, and more importantly, PC steel wire is cold forged in the process of approximate triangulation by cold rolling to increase tensile strength, and to easily form screw stones corresponding to female screws on the main surface of PC steel wire. It is.
본 고안을 첨부도면에 따라서 상세하게 설명하면 다음과 같다.Referring to the present invention in detail according to the accompanying drawings as follows.
P.C강선은 근사 삼각형(1)으로 냉간 압연 되었다.The P.C steel was cold rolled into an approximate triangle (1).
근사 삼각형(1)의 삼변은 만곡면(2)이고 삼각형의 모서리는 원호면(3)이다.The three sides of the approximate triangle 1 are curved surfaces 2 and the edges of the triangle are circular arc surfaces 3.
이와 같은 P.C강선의 근사삼각형(1)의 성형은 등분삼방향의 가압롤 (가)사이에 물려 인발 함으로써 냉간 단조됨과 동시에 성형된다.The forming of the approximate triangle 1 of the P.C steel wire is cold forged and molded at the same time by being pulled out between the pressing rolls in the equal triangular direction.
이때에 롤(가)의 가압면(나)은 원호면(3)에 대응하고 원호면(3)은 P.C강선의 원주면이 변형되어 형성된다.At this time, the pressing surface (b) of the roll (a) corresponds to the arc surface 3, and the arc surface 3 is formed by deforming the circumferential surface of the P.C steel wire.
상기한 근사 삼각형(1) P.C강선의 3방향 원호면(3)에는 암나사에 대응한 3등분 스크류나사(4)가 형성된다.The three-way circular screw surface 3 corresponding to the female thread is formed on the three-way circular arc surface 3 of the approximate triangle 1 P.C steel wire.
스크류나사(4)의 성형은 등분 3방향 다듬질를 (다)에 끼워 인발 함으로써 만들어진다.The shaping of the screw screw 4 is made by inserting equally three-way finishing in (C).
P.C강선의 원호면(3)은 다듬질롤러(다)의 가압면(라)에 접속되고 가압면(라)의 치구(마)에 가입되거 스크류나사(4)가 성형되는 것이다. 이와 같이 본 고안은 통상의 P.C강선을 냉간 압연하여 근사 삼각형화 하는 과정에서 인장강도가 증강되고 근사삼각형의 원호면에 스크류 나사 돌조를 성형함으로써 콘크리트와의 접착력이 증대됨과 동시에 P.C강선의 피로도가 양단 고정부에 집중됨을 방지하고, 간단한 스크류 너트로서 P.C강선을 고정할 수 있는 효과가 있다.The circular arc surface 3 of the P.C steel wire is connected to the pressing surface (d) of the finishing roller (d), joined to the jig (e) of the pressing surface (d), and the screw thread 4 is formed. In this way, the present invention is cold rolled conventional PC steel wire to increase the tensile strength in the process of approximate triangulation, and by forming a screw screw protrusion on the arc surface of the approximate triangle to increase the adhesive strength with the concrete and at the same time the fatigue strength of the PC steel wire Prevents concentration on the fixing part, and has the effect of fixing the PC steel wire as a simple screw nut.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860004079U KR890005053Y1 (en) | 1986-04-01 | 1986-04-01 | Triangle steel bar of p.c. concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860004079U KR890005053Y1 (en) | 1986-04-01 | 1986-04-01 | Triangle steel bar of p.c. concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR870016189U KR870016189U (en) | 1987-11-24 |
| KR890005053Y1 true KR890005053Y1 (en) | 1989-07-31 |
Family
ID=19250107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019860004079U KR890005053Y1 (en) | 1986-04-01 | 1986-04-01 | Triangle steel bar of p.c. concrete |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR890005053Y1 (en) |
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1986
- 1986-04-01 KR KR2019860004079U patent/KR890005053Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR870016189U (en) | 1987-11-24 |
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