JPH05156708A - Cracking prevention method of girder in angular frame construction - Google Patents

Cracking prevention method of girder in angular frame construction

Info

Publication number
JPH05156708A
JPH05156708A JP35735591A JP35735591A JPH05156708A JP H05156708 A JPH05156708 A JP H05156708A JP 35735591 A JP35735591 A JP 35735591A JP 35735591 A JP35735591 A JP 35735591A JP H05156708 A JPH05156708 A JP H05156708A
Authority
JP
Japan
Prior art keywords
girder
frame construction
angular
steel materials
mountain
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP35735591A
Other languages
Japanese (ja)
Other versions
JP2743130B2 (en
Inventor
Seiji Takeda
清二 竹田
Yoshihiro Nakada
由洋 中田
Takuo Sato
卓夫 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fudo Kenken Kk
Original Assignee
Fudo Kenken Kk
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 Fudo Kenken Kk filed Critical Fudo Kenken Kk
Priority to JP35735591A priority Critical patent/JP2743130B2/en
Publication of JPH05156708A publication Critical patent/JPH05156708A/en
Application granted granted Critical
Publication of JP2743130B2 publication Critical patent/JP2743130B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Rod-Shaped Construction Members (AREA)

Abstract

PURPOSE:To prevent a girder from cracking by arranging longitudinal PC steel materials to the angular top of the girder arranging the PC steel materials lengthwise in an angular frame construction to introduce longitudinal pre-stress. CONSTITUTION:PC steel materials 2 and 3 introducing prestress are arranged lengthwise of the angular top of a girder 1 in an angular frame construction. In addition, two longitudinal PC steel materials 7 are arranged to each of symmetrical positions of a ridge beam 5 in the angular top of the girder 1 to introduce longitudinal prestress. According to the constitution, the cracking occurring in the angular top of the girder can be easily and effectively prevented.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、山形ラーメン構造物に
おける大梁の亀裂防止方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing a large beam from cracking in a mountain-shaped rigid frame structure.

【０００２】[0002]

【発明の目的】場所打ちコンクリート造の山形ラーメン
構造物では、スパンが大きい場合に、大梁と柱にポスト
テンショニング方式でプレストレスを導入することが行
われている。SUMMARY OF THE INVENTION In a cast-in-place concrete mountain-shaped rigid frame structure, prestressing is applied to the girders and columns by a post tensioning method when the span is large.

【０００３】そして、大梁におけるＰＣ鋼材の配置に
は、図２の（Ａ）に示すように大梁１の端部から山形頂
部まで延びるＰＣ鋼材２，３を配置する方式と、図２の
（Ｂ）に示すように大梁１の一端部から他端部まで通し
てＰＣ鋼材４を配置する方式とがあるが、これら何れの
方式においても、プレストレス導入後に、大梁１の山形
頂部に横方向の亀裂が入る場合が多く、従来から問題に
なっていた。The arrangement of the PC steel materials in the girder is a method of arranging the PC steel materials 2 and 3 extending from the end portion of the girder 1 to the top of the chevron as shown in FIG. There is a method of arranging the PC steel material 4 from one end to the other end of the girder 1 as shown in FIG. 4). It often causes cracks, which has been a problem in the past.

【０００４】本発明の目的は、前記亀裂の発生を防止す
る手段を提供することにある。An object of the present invention is to provide means for preventing the occurrence of cracks.

【０００５】[0005]

【発明の構成】本発明の構成上の特徴は、山形ラーメン
構造物における長さ方向にＰＣ鋼材を配置した大梁の山
形頂部に、縦方向のＰＣ鋼材を配置し、このＰＣ鋼材で
大梁の山形頂部に縦方向のプレストレスを導入すること
により、大梁に長さ方向のプレストレスを導入したとき
に山形頂部に発生する亀裂を防止する点にある。The structure of the present invention is characterized in that a vertical PC steel material is arranged at the top of a mountain girder of a large beam in which a PC steel material is arranged in the longitudinal direction in a mountain-shaped ramen structure. By introducing the pre-stress in the vertical direction at the top, it is possible to prevent cracks occurring at the top of the chevron when the pre-stress in the longitudinal direction is introduced at the girder.

【０００６】[0006]

【実施例の説明】図１は、図２の（Ａ）に示す方式で長
さ方向にプレストレスを導入するＰＣ鋼材２，３が配置
されている大梁１の山形頂部を示しており、図中、５は
棟梁、６は小梁である。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a chevron top of a girder 1 on which PC steel materials 2 and 3 for introducing prestress in the lengthwise direction are arranged by the method shown in FIG. Inside, 5 is a master beam and 6 is a small beam.

【０００７】前述の亀裂は、ＰＣ鋼材２，３により大梁
１に長さ方向のプレストレスを導入したときに、棟梁５
の下方に発生するが、この亀裂の発生を防止するため
に、この実施例では、大梁１の山形頂部の、棟梁５の左
右対称位置にそれぞれ２本の縦方向のＰＣ鋼材７を配置
し、その緊張・定着により、大梁１の山形頂部に縦方向
のプレストレスを導入するようにしている。The above-mentioned cracks occur when the prestress in the lengthwise direction is introduced into the girder 1 by the PC steel materials 2 and 3, and thus the ridge beam 5
In order to prevent the occurrence of this crack, in this example, two vertical PC steel materials 7 are arranged at the bilaterally symmetrical positions of the master beam 5 at the mountain top of the girder 1, Due to the tension and fixation, vertical prestress is introduced to the mountain top of the girder 1.

【０００８】[0008]

【発明の効果】本発明によれば、山形ラーメン構造物に
おける大梁に長さ方向のプレストレスを導入したときに
大梁の山形頂部に発生する亀裂を、簡単かつ有効に防止
することができるので、長スパンの山形ラーメン構造物
の構築に寄与するところ大である。According to the present invention, it is possible to easily and effectively prevent the cracks generated at the mountain tops of the girders when the longitudinal prestress is introduced into the girders in the mountain-shaped rigid frame structure. It greatly contributes to the construction of long-span Yamagata ramen structures.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例の説明図である。FIG. 1 is an explanatory diagram of an embodiment of the present invention.

【図２】山形ラーメン構造物における大梁に長さ方向の
プレストレスを導入するＰＣ鋼材の配置態様図である。FIG. 2 is an arrangement diagram of a PC steel material for introducing a prestress in a longitudinal direction into a girder in a mountain-shaped rigid frame structure.

【符号の説明】[Explanation of symbols]

１：大梁、２，３，４：ＰＣ鋼材、５：棟梁、６：小
梁、７：ＰＣ鋼材。1: Large beam, 2, 3, 4: PC steel material, 5: Master beam, 6: Small beam, 7: PC steel material.

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 山形ラーメン構造物における長さ方向に
ＰＣ鋼材を配置した大梁の山形頂部に、縦方向のＰＣ鋼
材を配置し、このＰＣ鋼材で大梁の山形頂部に縦方向の
プレストレスを導入することにより、大梁に長さ方向の
プレストレスを導入したときに山形頂部に発生する亀裂
を防止することを特徴とする山形ラーメン構造物におけ
る大梁の亀裂防止方法。1. A vertical PC steel material is arranged at the mountain top of a large beam in which a PC steel material is arranged in the longitudinal direction in a mountain-shaped rigid frame structure, and vertical prestress is introduced at the mountain top of the large beam by this PC steel material. A crack prevention method for a girder in a mountain-shaped ramen structure, characterized by preventing cracks that occur at the apex of the chevron when a prestress in the longitudinal direction is introduced into the girder.
JP35735591A 1991-12-02 1991-12-02 Prevention method of girder crack in Yamagata ramen structure Expired - Lifetime JP2743130B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35735591A JP2743130B2 (en) 1991-12-02 1991-12-02 Prevention method of girder crack in Yamagata ramen structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35735591A JP2743130B2 (en) 1991-12-02 1991-12-02 Prevention method of girder crack in Yamagata ramen structure

Publications (2)

Publication Number Publication Date
JPH05156708A true JPH05156708A (en) 1993-06-22
JP2743130B2 JP2743130B2 (en) 1998-04-22

Family

ID=18453709

Family Applications (1)

Application Number Title Priority Date Filing Date
JP35735591A Expired - Lifetime JP2743130B2 (en) 1991-12-02 1991-12-02 Prevention method of girder crack in Yamagata ramen structure

Country Status (1)

Country Link
JP (1) JP2743130B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101110744B1 (en) * 2009-10-01 2012-02-24 쌍용건설 주식회사 Vertical Post Tension Structure Of Sloping Structure And Its Construction Method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101110744B1 (en) * 2009-10-01 2012-02-24 쌍용건설 주식회사 Vertical Post Tension Structure Of Sloping Structure And Its Construction Method

Also Published As

Publication number Publication date
JP2743130B2 (en) 1998-04-22

Similar Documents

Publication Publication Date Title
JPH05156708A (en) Cracking prevention method of girder in angular frame construction
JPH076231B2 (en) Method for introducing tension in radial tension string structure
JP2827851B2 (en) Prestressed steel beam
JP2003027415A (en) PCa GIRDER CONNECTING METHOD AND BRIDGE FALL PREVENTING METHOD
JP2000064222A (en) Elevated bridge
JP2528435B2 (en) Prestressing reinforcement structure for structures with girders installed in parallel
DE69939557D1 (en) METHOD FOR CONSTRUCTING A PREFERRED STRUCTURE AND A STRUCTURE MADE THEREFOR
JP2000064228A (en) Erection method for box girder bridge
JP3215956B2 (en) Precast concrete beams
JP2895422B2 (en) Pillar reinforcement structure
JPH01198936A (en) Reinforcement of flat slab pillar head part
JPH116198A (en) Crack preventive structure of joint-bar reinforcing type steel-encased reinforced concrete-constructed column-beam joining section
JPH07150632A (en) Precast concrete skeleton and construction method thereof
JPH0525886A (en) Composite beam
JPH04128460A (en) Reinforcing structural member
JP2732113B2 (en) PC column / beam joining method
JPH0375701B2 (en)
JPH03235848A (en) Connecting structure of slab to steel pipe pillar in flat slab structure
JPH0141787B2 (en)
JPH01312107A (en) Cable stayed bridge
Viest Summary Report on Bridge Research
JPH02296910A (en) Inclined cable bridge
JPS6233952A (en) Method for introducing prestress into horizontal member in concrete building
JPH07300814A (en) Form timbering for arch concrete construction
JPS62248732A (en) Structure of pillar/beam connection part

Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090206

Year of fee payment: 11

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100206

Year of fee payment: 12

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 13

Free format text: PAYMENT UNTIL: 20110206

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 13

Free format text: PAYMENT UNTIL: 20110206

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 14

Free format text: PAYMENT UNTIL: 20120206

EXPY Cancellation because of completion of term