KR20050054406A - Strengthening method of continuous girder and beam applying post tensioning - Google Patents

Strengthening method of continuous girder and beam applying post tensioning Download PDF

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KR20050054406A
KR20050054406A KR1020030087782A KR20030087782A KR20050054406A KR 20050054406 A KR20050054406 A KR 20050054406A KR 1020030087782 A KR1020030087782 A KR 1020030087782A KR 20030087782 A KR20030087782 A KR 20030087782A KR 20050054406 A KR20050054406 A KR 20050054406A
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steel wire
fixing block
steel
tension
continuous
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KR1020030087782A
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KR100686467B1 (en
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이창남
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이창남
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • E01D2101/28Concrete reinforced prestressed
    • E01D2101/285Composite prestressed concrete-metal

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

철근콘크리트나 철골보(큰 보와 작은 보의 총칭)의 내력이 부족하면 별도의 철골보를 추가하거나 강판을 부착하는 것이 일반적인 공법이며 최근에는 도 5와 같은 포스트텐션공법도 있다. 본 발명은 연속보일 경우 도 2, 도 3, 도 4와 같이 보의 각 단부에 정착블록을 부착하는 대신 연속보의 최외단에만 정착블록 또는 지압판을 부착하고 그 사이 나머지 구간은 보강하고자 하는 보와 직각방향의 다른 보 단부 상단에 강선구멍을 뚫어 PS강선을 관통시켜 정착블록 역할을 대신하게 하는 공법이다.If the strength of the reinforced concrete or cheolgolbo (general of large beams and small beams) is insufficient, it is a common method to add a separate steel cheolgolbo or attach a steel plate, and recently there is a post-tension method as shown in FIG. In the present invention, instead of attaching a fixing block to each end of the beam as shown in FIGS. 2, 3, and 4, the fixing block or acupressure plate is attached only to the outermost end of the continuous beam, and the remaining sections between the beam to be reinforced. It is a method to drill the steel wire hole on the top of the other beam end of the right angle to pass through the PS steel wire to take the role of a fixing block.

도 2, 도 3, 도 4와 같이 PS강선을 배열하고 정착블록(1), 지압판(2) 또는 이음장치(4)에서 유압잭으로 PS강선을 긴장하여 강선콘(5)으로 정착하면 PS강선의 긴장력은 보의 중앙에 부착한 지지블록(3)을 위로 끌어올리는 힘이 유발되어 아래로 처지는 보가 복원되고 결국 내력이 부족한 보를 보강하는 효과를 발휘한다.2, 3, and 4 to arrange the PS steel wires and tension the PS steel wires with a hydraulic jack in the fixing block (1), the pressure plate (2) or the joint device (4) to fix the steel wire cone (5) of the PS steel wire Tension force is induced to pull up the support block (3) attached to the center of the beam to restore the sagging down and eventually to reinforce the lack of strength.

도 8의 미끄럼블록(8)은 PS강선이 구부러지면서 강선구멍(6)을 통과할 때 손상을 받지 않도록 하는 역할을 한다.The sliding block 8 of FIG. 8 serves to prevent the PS steel wire from being damaged while passing through the steel wire hole 6 while the PS steel wire is bent.

Description

포스트텐션 연속보(큰 보 또는 작은 보) 보강공법{Strengthening Method of Continuous Girder and Beam Applying Post Tensioning}Strengthening method of post-tension continuous beam (large or small beam) {Strengthening Method of Continuous Girder and Beam Applying Post Tensioning}

내력이 부족한 보를 보강하는 일반적인 포스트텐션 보강방법은 보강하고자 하는 보 각각을 대상으로 하나 본 발명은 일직선상에 있는 여러 개의 보를 연속보 개념으로 취급함으로 인한 보강작업 간략화와 공사비절감을 목적으로 한다.The general post-tension reinforcement method for reinforcing a beam having insufficient strength is for each beam to be reinforced, but the present invention aims to simplify reinforcement work and reduce construction cost by treating a plurality of beams in a straight line as a continuous beam concept.

철근콘크리트나 철골보의 내력이 부족하면 별도의 철골보를 추가하거나 강판을 부착 하는 것이 일반적인 보강공법이며 최근에는 도 5와 같은 포스트텐션공법도 있다. 이는 보강하고자 하는 보 단부마다 값비싼 정착블록을 부착하여야 하며 설치비도 부담이 된다. 그러나 아직은 연속보일 경우 최외단에만 정착블록을 마련하고 그 사이 중간 단부에서는 생략하는 획기적인 방법이 없는 실정이다.If the strength of the reinforced concrete or cheolgolbo is not enough to add a separate cheolgolbo or attach a steel plate is a general reinforcement method and recently there is also a post-tension method as shown in FIG. This requires attaching an expensive fixing block to each end of the beam to be reinforced, which also burdens installation costs. However, there is no breakthrough method of providing a fixing block only at the outermost end and skipping at the middle end in the case of continuous beams.

1열로 배열된 2개 이상의 보를 하나의 연속보로 취급하여 좌우 끝단에만 PS강선 정착블록을 설치하고 나머지 구간은 PS강선을 무리 없이 통과시켜 정착블록을 생략하면서도 정착기능을 담당하게 하는 방법이 필요하며, PS강선의 연장 길이가 길어지고 위아래로 여러 차례 구부러짐에 따르는 미끄럼 저항을 줄이는 방법 제시가 필요하다. 또한 일반적인 종래의 포스트텐션 보강공법에서는 보강하고자 하는 보의 단부에 직각 방향으로 다른 보가 가로막고 있어서 보의 단부마다 정착블록을 부착하는 것이지만 위 직각방향의 보를 정착블록 대용으로 활용하는 공법 연구가 필요하다.Treat two or more beams arranged in a row as one continuous beam, and install the PS steel fixing block only at the left and right ends, and pass the PS steel wire through the PS section without difficulty, so that the fixing block can be omitted while maintaining the fixing function. Therefore, it is necessary to provide a way to reduce the sliding resistance caused by the extension of the PS steel wire and its bending up and down several times. In addition, in the conventional conventional post-tension reinforcement method, another beam is blocked at right angles to the end of the beam to be reinforced, so that the fixing block is attached to each end of the beam, but a study on a method of utilizing the beam at the right angle as a fixing block is required.

도 2, 도3, 도4는 각각 도 1의 3열, b열 거더 및 2-3열 사이의 빔을 포스트텐션 연속보 보강공법으로 보강한 가구도이다. 이들의 공통점은 2-3개의 연속보 최외단 중 한 쪽에는 보의 단부 측면상단에 정착블록(1)을 붙여서 강선콘(5)으로 PS강선(7)을 정착시키고 다른 한 쪽은 해당 보 단부와 직각방향으로 배열된 다른 보 단부 측면상단에 강선구멍을 뚫어 PS강선을 통과시켜서 지압판(2)과 강선콘으로 정착시킨 그림이다. 만약 건물 외부에 지압판과 강선콘을 노출시켜도 되는 경우라면 연속보 양단 모두 정착블록 대신 지압판을 사용해도 된다.2, 3, and 4 is a furniture diagram reinforced with a post-tension continuous beam reinforcement method of the beam between the third row, row b girder and column 2-3 of Figure 1, respectively. Their common point is to attach the fixing block (1) to the upper end side of the beam on one side of the 2-3 continuous beam outermost to fix the PS steel wire (7) with the steel wire cone (5) and the other end of the beam This is a picture of a steel wire hole drilled through the PS steel wire at the top of the side of another beam end arranged at right angles with the anchor plate (2) and the steel wire cone. If the pressure plate and steel wire cone can be exposed outside the building, the pressure plate may be used instead of the fixing block at both ends of the continuous beam.

정착블록의 종류는 도 6a와 같이 2개 이상의 앵커볼트(9)로 부착하는 방법과 6b처럼 대구경볼트너트(11)로 고정시키는 방법이 있다. 대구경볼트너트 한 개로 양측 정착불록을 동시에 부착할 수 있다.There are two types of fixing blocks, a method of attaching two or more anchor bolts 9 as shown in FIG. 6A and a method of fixing with a large diameter bolt nut 11 as shown in 6b. One large-diameter bolt nut can be used to attach both fixing blocks at the same time.

도 2와 4에서 지지블록(3)의 형태는 도 6c이고 도 3과 같이 보 중간에 빔이 걸려 있을 경우는 도 6d가 적합하다. 또한 도 2, 도 3, 도 4에서 공통적으로 사용하고 있는 이음장치(4)의 대표적인 것은 도 7과 같으며 이들은 정착블록 뒷면 공간이 협소하여 유압잭으로 PS강선을 긴장정착하기 어려울 경우 사용하기 위하여 개발한 것이며 위 모든 부속품들은 이미 생산하여 보강공사에 적용중이다.In Figures 2 and 4, the support block 3 has a shape of FIG. 6C, and FIG. 6D is suitable when a beam is hung in the middle of the beam as shown in FIG. In addition, typical of the joint device 4 commonly used in Figs. 2, 3, and 4 are the same as in Fig. 7 and these are developed for use when it is difficult to fix the PS steel wire with the hydraulic jack due to the narrow space behind the fixing block. All of the above accessories are already in production and applied to reinforcement work.

도 2, 도 3, 도 4에서 보 상단에 강선구멍을 뚫어 PS강선(7)을 통과시키려면 될수록 마찰저항이 적고 PS강선의 손상을 방지하는 조치가 필요하다. 도 8은 철근콘크리트보와 철골보일 경우 강선구멍(6) 좌우면에 부착하여 PS강선을 보호하는 미끄럼블록(8)에 관한 것이다. 미끄럼블록의 PS강선통과용 구멍의 크기는 강선구멍보다 작은 40mm 정도로 구멍주변이 나팔 주둥이처럼 두툼하다. 또한 PS강선을 긴장하는 과정에서 강선구멍에 닿지 않으면서 어느 한 부위가 편심으로 눌려도 파손되지 않고 쉽게 미끄러지도록 한다. 미끄럼블록의 고정은 강선받이쇠(12)와 2개의 앵커볼트 또는 볼트너트로 보에 고정시킬 수 있는 부착판(13)이 일체화된 것이다.In FIGS. 2, 3, and 4, a steel wire hole is drilled in the upper end of the beam to pass the PS steel wire 7 as much as the frictional resistance decreases, and measures to prevent damage to the PS steel wire are necessary. Figure 8 relates to a sliding block (8) to protect the PS steel wire by attaching to the steel wire hole (6) left and right when the reinforced concrete beam and steel frame beam. The size of the PS steel wire through hole of the sliding block is 40mm smaller than the steel wire hole, and the periphery of the hole is as thick as a trumpet snout. In addition, the PS steel wire does not touch the steel wire hole in the process of tensioning, so that any part of the PS steel wire does not break even if it is pressed eccentrically, so that it slides easily. The fixing of the sliding block is a steel plate support 12 and the attachment plate 13 that can be fixed to the beam with two anchor bolts or bolt nuts are integrated.

도 2, 도 3, 도 4에서 PS강선의 배치는 정착블록(1), 지지블록(3) 또는 이음장치(4)에서 유압잭으로 PS강선을 긴장하여 강선콘(5)으로 정착한다. 이 때 PS강선의 긴장력은 보의 중앙에 부착한 지지블록을 상방향으로 끌어올리는 힘으로 전환하여 아래로 처지는 보를 복원시키고 결국 내력이 부족한 보를 보강하는 효과를 발휘한다. 강선구멍의 직경은 45mm가 적당하며 철근콘크리트 보는 코어 보링, 철골보는 용접기로 천공한다.2, 3, and 4 in the arrangement of the PS steel wire is fixed to the steel wire cone (5) by tensioning the PS steel wire with a hydraulic jack in the fixing block (1), the support block (3) or the coupling device (4). At this time, the tension of the PS steel wire is converted to the upward force of the support block attached to the center of the beam to restore the beam that sags downward, and eventually reinforces the beam having insufficient strength. The diameter of the steel wire hole is 45mm, and the core concrete boring and the steel ball are drilled by the welder.

보강하고자 하는 보가 2개 이상 일직선상에 연속되어 있으면 각각의 보를 보강하는 대신 한조의 연속보로 취급한 포스트텐선 연속보 보강방법을 적용하면 연속보의 좌우 최외단부를 제외한 나머지 보 단부는 정착블록이 없어도 되므로 시공도 간편해지고 공사비도 절감되는 효과가 있다.If two or more beams are continuous in a straight line, the post-tendon continuous beam reinforcement method, which is treated as a set of continuous beams instead of reinforcing each beam, applies the fixing block except for the left and right outermost ends of the continuous beam. Since it is not necessary, the construction can be simplified and the cost of construction can be reduced.

도 1은 포스트텐션 연속보 보강공법으로 보강한 프레임도,1 is a frame diagram reinforced by a post-tension continuous beam reinforcement method,

도 2는 도 1의 3열 가로방향 거더 보강도,2 is a three-row transverse girder reinforcement of Figure 1,

도 3은 도 1의 b열 가로방향 빔 보강도,3 is a horizontal beam reinforcement of column b of FIG.

도 4는 도 1의 2-3열 사이 가로방향 연속 빔 보강도,4 is a horizontal continuous beam reinforcement between columns 2-3 of FIG.

도 5는 종래 3열 가로방향 거더 보강도,5 is a conventional three-row transverse girder reinforcement,

도 6은 정착블록과 지지블록,6 is a fixing block and a support block,

도 7은 이음장치,7 is a joint device,

도 8은 미끄럼블록도,8 is a sliding block diagram;

도 9는 지압판이다.9 is a pressure plate.

<도면의 부호에 대한 간단한 설명><Brief description of the symbols in the drawings>

C : 기둥 G1, G2, G3, G4 : 가로방향 거더C: Column G1, G2, G3, G4: Horizontal girders

B : 가로방향 빔 Ga, Gb, Gc : 세로방향 거더B: horizontal beam Ga, Gb, Gc: longitudinal girder

1 : 정착블록 2 : 지압판1: fixing block 2: pressure plate

3 : 지지블록 4 : 이음장치3: support block 4: joint device

5 : 강선콘 6 : 강선구멍5: steel wire cone 6: steel wire hole

7 : PS강선 8 : 미끄럼블록7: PS steel wire 8: sliding block

9 : 앵커볼트 10: 볼트너트9: Anchor Bolt 10: Bolt Nut

11: 대구경볼트너트 12: 강선받이쇠11: Large Bore Bolt Nut 12: Wire Support

13: 부착판 14 : 통과용 구멍13: mounting plate 14: through hole

Claims (3)

2 개 이상의 보가 일직선상에 배열된 연속보의 최외단 측면상단에 정착블록(1)과, 보 중앙하단에 지지블럭(3), 가운데 보에 미끄럼블럭(8), 연속보 적정한 위치에 이음장치(4), 연속보의 나머지 단부에 강선구멍을 뚫어 PS강선(7)을 지압판(2)에 설치하도록 구성하고 ;Fixing block (1) at the top of the outermost side of continuous beams in which two or more beams are arranged in a straight line, support block (3) at the center bottom of beam, sliding block (8) in middle beam, and continuous beam (4), the steel wire hole is drilled in the remaining end of the continuous beam so that the PS steel wire 7 is installed on the pressure plate 2; 상기 정착블록(1)은 최외단 보와 직각으로 만나는 경우, 다른 보 단부 측면상단에 강선구멍(6)을 뚫어 지압판(2)을 정착블록(1)으로 대용하여 PS강선(7)을 배치하고 유압잭으로 긴장하는 것을 특징으로 하는 포스트텐션 연속보 보강공법.When the fixing block 1 meets at the right angle with the outermost beam, the steel wire hole 6 is drilled in the upper side surface of the other beam end, and the PS steel wire 7 is disposed by substituting the pressure plate 2 as the fixing block 1. Post-tension continuous beam reinforcement method characterized in that the tension by the hydraulic jack. 제 1항에 있어서 미끄럼블록(8)은 강선구멍(6)과 강선받이쇠(12), 2개의 앵커볼트(9), 부착판(13)으로 구성되고 ;The sliding block (8) according to claim 1 is composed of a steel wire hole (6), a steel wire receiving pin (12), two anchor bolts (9), and an attachment plate (13); 상기 강선구멍(6)은 보에 뚫린 통과용 구멍(14) 보다 40mm 정도 작고 PS강선(7)을 지지하는 면이 나팔 주둥이처럽 두툼하여 PS강선(7)이 강선구멍에 닿지 않고 쉽게 미끄러지도록 보에 부착된 것을 특징으로 하는 포스트텐션 연속보 보강공법.The steel wire hole 6 is about 40 mm smaller than the through hole 14 drilled in the beam, and the surface supporting the PS steel wire 7 is roughly trumpeted so that the PS steel wire 7 can easily slide without touching the steel wire hole. Post-tension continuous beam reinforcement method characterized in that attached to. 제 1항에 있어서 이음장치(4)는 PS강선(7) 배열을 위해 적정한 곳에 설치하고, 지압판 후면에서 유압잭으로 PS강선을 긴장하여 강선콘(5)으로 정착하는 것을 특징으로 하는 포스트텐션 연속보 보강공법.According to claim 1, the joint device (4) is installed in a suitable place for the arrangement of the PS steel wire (7), the post-tension continuous beam, characterized in that to fix the PS steel wire to the steel wire cone (5) by tensioning the PS steel wire with a hydraulic jack at the back of the pressure plate. Reinforcement method.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104963300A (en) * 2015-07-24 2015-10-07 重庆交通大学 External prestress multipoint anchoring strengthening method of bridge structure
CN106223212A (en) * 2016-08-11 2016-12-14 宁波市交通规划设计研究院有限公司 A kind of reinforcement means suffering fired damage bridge
CN108589739A (en) * 2018-05-31 2018-09-28 上海宝冶集团有限公司 It is anti-buckling to support the modularization foundation pit supporting system being combined with beam string

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2927671B2 (en) * 1994-04-07 1999-07-28 株式会社エスイー External cable installation method
KR100386478B1 (en) * 1999-12-28 2003-06-02 이창남 Grip, Supporter, and Connector for prestressing wire and post-tensioning method using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104963300A (en) * 2015-07-24 2015-10-07 重庆交通大学 External prestress multipoint anchoring strengthening method of bridge structure
CN106223212A (en) * 2016-08-11 2016-12-14 宁波市交通规划设计研究院有限公司 A kind of reinforcement means suffering fired damage bridge
CN106223212B (en) * 2016-08-11 2017-12-15 宁波市交通规划设计研究院有限公司 A kind of reinforcement means by fired damage bridge
CN108589739A (en) * 2018-05-31 2018-09-28 上海宝冶集团有限公司 It is anti-buckling to support the modularization foundation pit supporting system being combined with beam string

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