JP2977994B2 - Reinforcement structure of concrete filled steel pipe member - Google Patents

Reinforcement structure of concrete filled steel pipe member

Info

Publication number
JP2977994B2
JP2977994B2 JP4106562A JP10656292A JP2977994B2 JP 2977994 B2 JP2977994 B2 JP 2977994B2 JP 4106562 A JP4106562 A JP 4106562A JP 10656292 A JP10656292 A JP 10656292A JP 2977994 B2 JP2977994 B2 JP 2977994B2
Authority
JP
Japan
Prior art keywords
steel pipe
concrete
filled
reinforcing
filled steel
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.)
Expired - Lifetime
Application number
JP4106562A
Other languages
Japanese (ja)
Other versions
JPH06167073A (en
Inventor
康生 一戸
章夫 大竹
輝雄 松谷
將好 中島
弘樹 上田
政英 富井
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.)
Nippon Steel Corp
Konoike Construction Co Ltd
Original Assignee
Sumitomo Metal Industries Ltd
Konoike Construction Co Ltd
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 Sumitomo Metal Industries Ltd, Konoike Construction Co Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP4106562A priority Critical patent/JP2977994B2/en
Publication of JPH06167073A publication Critical patent/JPH06167073A/en
Application granted granted Critical
Publication of JP2977994B2 publication Critical patent/JP2977994B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は主として建築及び土木構
造物に用いられるコンクリート充填鋼管部材の補強構造
に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure for a concrete-filled steel pipe member mainly used for construction and civil engineering structures.

【0002】[0002]

【従来の技術】柱あるいは梁等にコンクリート充填鋼管
部材を用いた構造物に地震力等の水平力が作用した場
合、部材に作用する応力は長手方向について一様ではな
い。しかし、部材の必要性能、即ち部材断面は、最も応
力が高い部分が安全であるように設計され、その断面は
部材全長にわたって一定である場合が一般的である。
2. Description of the Related Art When a horizontal force such as an earthquake force acts on a structure using a concrete-filled steel pipe member for a column or a beam, the stress acting on the member is not uniform in the longitudinal direction. However, the required performance of the member, i.e., the member cross section, is designed so that the portion with the highest stress is safe, and the cross section is generally constant over the entire length of the member.

【0003】また、コンクリート充填鋼管部材からなる
橋脚において、鋼管の局部座屈等を防止し、高い軸方向
圧縮強度を発揮させるため、鋼管と充填コンクリートと
を非付着状態としたアンボンド型のコンクリート充填鋼
管構造等も開発されている(特公平3−54726号公
報参照)。
[0003] Further, in a bridge pier made of a concrete-filled steel pipe member, in order to prevent local buckling of the steel pipe and to exhibit high axial compressive strength, an unbonded concrete filling in which the steel pipe and the filled concrete are not adhered to each other. A steel pipe structure has also been developed (see Japanese Patent Publication No. 3-54726).

【0004】また、一方で、作用する応力が高くなる柱
頭部及び柱脚部の肉厚を局部的に厚くした鋳造鋼管柱も
開発されている(実開昭61−124512号公報参
照)。
[0004] On the other hand, a cast steel pipe column has been developed in which the thickness of the column head and column base where the applied stress becomes high is locally increased (see Japanese Utility Model Application Laid-Open No. 61-124512).

【0005】[0005]

【発明が解決しようとする課題】前述のように部材に作
用する応力は一様ではなく、例えば柱部材の場合には、
柱頭部及び柱脚部においてモーメントが最大になり、柱
頭部及び柱脚の破壊(特に鋼管の外側への局部座屈)で
柱の耐力が決まる。そのため、部材断面(鋼管の肉厚)
が材長にわたり一定である従来技術では、応力レベルの
低い柱の中間部には余剰耐力が残存し、極めて不経済な
設計となる。
As described above, the stress acting on the member is not uniform. For example, in the case of a column member,
The moment is maximized at the capital and pedestal, and the strength of the column is determined by the fracture of the capital and pedestal (particularly local buckling to the outside of the steel pipe). Therefore, the section of the member (thickness of the steel pipe)
In the prior art in which the stress is constant over the length of the material, the excess yield strength remains in the middle of the column having a low stress level, resulting in an extremely uneconomical design.

【0006】また、柱頭部及び柱脚部の肉厚を局部的に
厚くした鋳造鋼管は製造コストが高くつく上、補強範囲
及び補強の程度も鋳造鋼管の製造範囲に限定され、設計
の自由度は限られたものとなる。
A cast steel pipe having locally thickened column heads and column bases is expensive to manufacture, and the range of reinforcement and the degree of reinforcement are limited to the range of manufacture of the cast steel pipe. Is limited.

【0007】本発明は上述のような問題点の解決を図っ
たものである。
The present invention has been made to solve the above problems.

【0008】[0008]

【課題を解決するための手段】本発明の補強構造は、コ
ンクリート充填鋼管部材の鋼管の外側に、前記鋼管より
径の大きい補強鋼管を長手方向所要区間にわたって配置
し、前記鋼管外面と前記補強鋼管内面との間に硬化材を
充填することにより、前記コンクリート充填鋼管部材を
構成する鋼管及びコンクリートの外側への変形を、前記
補強鋼管及び硬化材により拘束したことを特徴とする
のである。
The reinforcing structure according to the present invention is such that a reinforcing steel pipe having a diameter larger than the steel pipe is disposed outside a steel pipe of the concrete-filled steel pipe member over a required section in the longitudinal direction, and the outer surface of the steel pipe and the reinforcing steel pipe are provided. By filling the hardening material between the inner surface and the concrete filled steel pipe member
Outward deformation of the steel pipe and concrete that constitutes
It is characterized by being restrained by a reinforcing steel pipe and a hardening material .

【0009】補強鋼管は、コンクリート充填鋼管部材に
おける部材の応力が大きくなる部分等に配置され、断面
は円筒形に限らず多角形の筒形であってもよい。また、
硬化材としては、モルタル、コンクリート、セメントペ
ースト、あるいは合成樹脂等が用いられる。
[0009] The reinforcing steel pipe is disposed in a portion of the concrete-filled steel pipe member where the stress of the member increases, and the cross section is not limited to a cylindrical shape but may be a polygonal cylindrical shape. Also,
As the hardening material, mortar, concrete, cement paste, synthetic resin or the like is used.

【0010】[0010]

【作用】コンクリート充填鋼管部材の鋼管は、外側に配
置された補強鋼管及びその間に充填された硬化材によっ
て外側へ局部座屈することが制限されるので、鋼管の局
部座屈による急激な耐力及び変形能の低下を防ぐことが
できる。一方、鋼管内部の充填コンクリートは、補強鋼
管及び間の硬化材によって、径方向外側への変形が拘束
されるので、鋼管だけの場合と比較し、圧縮強度及び靱
性が改善される。これら、2つの効果により部材全体の
耐力及び靱性が飛躍的に向上する。
The steel pipe of the concrete-filled steel pipe member is restricted from locally buckling outward due to the reinforcing steel pipe disposed outside and the hardening material filled therebetween, so that the rapid proof stress and deformation due to the local buckling of the steel pipe. It is possible to prevent a decrease in performance. On the other hand, in the filled concrete inside the steel pipe , the deformation to the radial outside is restricted by the reinforcing steel pipe and the hardening material therebetween, so that the compressive strength and the toughness are improved as compared with the case of only the steel pipe. These two effects dramatically improve the proof stress and toughness of the entire member.

【0011】また、補強の範囲及び補強の程度は、部材
の種別や部材に作用する応力状態で様々に変化する。本
構造では、補強鋼管の長さ及び肉厚を変えることによ
り、柔軟に対応できるので、局部的に鋼管の肉厚を変え
た鋳造鋼管を用いる場合とは異なり、設計の自由度は極
めて高い。
The range of the reinforcement and the degree of the reinforcement vary depending on the type of the member and the stress state acting on the member. In this structure, the length and thickness of the reinforcing steel pipe can be changed flexibly, so that the degree of freedom in design is extremely high, unlike the case of using a cast steel pipe in which the thickness of the steel pipe is locally changed.

【0012】さらに、補強鋼管の製作及びモルタル等、
現場での硬化材の充填作業は極めて容易であり、製作及
び施工面でのコスト上昇はわずかである。
Further, production of reinforced steel pipe and mortar, etc.
The on-site filling operation of the hardening material is extremely easy, and the cost increase in production and construction is small.

【0013】[0013]

【実施例】次に、本発明の実施例を図面に従って説明す
る。
Next, an embodiment of the present invention will be described with reference to the drawings.

【0014】図1及び図2は本発明の実施例における水
平断面を示したもので、図1は部材断面が円形(円形鋼
管3aの内部にコンクリート3cを充填)の場合、図2
は部材断面が角形(角形鋼管3bの内部にコンクリート
3cを充填)の場合である。これらコンクリート充填鋼
管部材3の外側に円形の補強鋼管1を配置し、円形鋼管
3aまたは角形鋼管3bと補強鋼管1との間にモルタル
またはコンクリート等の硬化材2が充填されている。
FIGS. 1 and 2 show a horizontal cross section in an embodiment of the present invention. FIG. 1 shows a case where a member cross section is circular (concrete 3c is filled in a circular steel pipe 3a).
Is a case where the section of the member is square (concrete 3c is filled in square steel pipe 3b). A circular reinforcing steel pipe 1 is disposed outside the concrete-filled steel pipe member 3, and a hardening material 2 such as mortar or concrete is filled between the circular steel pipe 3 a or the square steel pipe 3 b and the reinforcing steel pipe 1.

【0015】補強鋼管1は必ずしも円形である必要はな
いが、本構造を実施する上では、円周方向の引張で内向
きの拘束力を与える円形鋼管が最も力学的に優れてい
る。
Although the reinforcing steel pipe 1 does not necessarily have to be circular, a circular steel pipe which gives an inward restraining force by circumferential tension is most mechanically excellent in implementing the present structure.

【0016】図3は本発明をコンクリート充填鋼管柱4
に適用した場合の鉛直断面を示したもので、H形断面梁
5が接合され、モーメントが最大となる柱頭部と柱脚部
の所定区間に補強鋼管1を取り付け(取り付け方法につ
いては後述する)、コンクリート充填鋼管柱4の外面
と、補強鋼管1の内面との間に硬化材2を充填してい
る。
FIG. 3 shows a concrete filled steel pipe column 4 according to the present invention.
This shows a vertical cross section when applied to the above. The H-shaped beam 5 is joined, and the reinforcing steel pipe 1 is attached to a predetermined section between the column head and the column base where the moment is maximized (the attachment method will be described later). The hardening material 2 is filled between the outer surface of the concrete-filled steel pipe column 4 and the inner surface of the reinforcing steel pipe 1.

【0017】図3の実施例は補強を施す部材が柱の場合
であるが、柱に限らず、コンクリート充填鋼管構造とし
た梁部材、ラチス及びトラス部材の弦材及び斜材、
アーチ部材、ブレース部材等についても本発明を適
用することができる。
The embodiment shown in FIG. 3 is a case where the member to be reinforced is a column. However, the present invention is not limited to the column.
The present invention can be applied to an arch member, a brace member, and the like.

【0018】また、本実施例では補強範囲が部材長手方
向の一部であるが、必要に応じ部材全長にわたって補強
を施してもよい。さらに、補強部の断面も部材の応力状
態等に応じて、長手方向に変化させることができる。
In this embodiment, the reinforcing range is a part of the longitudinal direction of the member, but the reinforcing member may be reinforced over the entire length of the member if necessary. Further, the cross section of the reinforcing portion can be changed in the longitudinal direction according to the stress state of the member and the like.

【0019】本発明の補強構造の施工方法としては、代
表的なものとして、補強鋼管の設置方法に応じ、次の2
つの方法が考えられる。
As a method of constructing the reinforcing structure of the present invention, the following two methods are typically used according to the method of installing the reinforcing steel pipe.
There are two ways.

【0020】 鉄骨加工時または現場で、補強鋼管1
の中にコンクリート充填鋼管部材を構成する鋼管を挿入
し、鉄骨建方が終了した後に硬化材2を充填する。
At the time of steel frame processing or on site, the reinforcing steel pipe 1
The steel pipe constituting the concrete-filled steel pipe member is inserted into the steel pipe, and the hardening material 2 is filled after the steel frame construction is completed.

【0021】 2つに分割された補強鋼管を、既に構
築されたコンクリート充填鋼管部材の外側に配置し、2
つを溶接あるいはボルト接合等で接合することで補強鋼
管1を形成し、硬化材を充填する。
The reinforced steel pipe divided into two parts is arranged outside the concrete-filled steel pipe member already constructed, and
The reinforcing steel pipe 1 is formed by joining the two by welding or bolt joining, and the hardening material is filled.

【0022】構造物の設計段階で本発明の適用が決定し
ている場合には、上記、の何れの方法も可能である
が、被災した部材の補修に本発明を適用する際には、通
常の方法が採られることになる。
When the application of the present invention is determined at the stage of designing a structure, any of the above methods can be used. However, when the present invention is applied to repair of a member damaged, Method will be adopted.

【0023】[0023]

【発明の効果】本発明の補強構造をコンクリート充填鋼
管部材に用いれば、部材の応力が大きくなる部分を補強
することにより、経済的、合理的な部材を設計すること
ができる。
When the reinforcing structure of the present invention is used for a concrete-filled steel pipe member, an economical and rational member can be designed by reinforcing a portion where the stress of the member becomes large.

【0024】また、コンクリート充填鋼管部材の応力が
大きい部分について、鋼管及び内部の充填コンクリート
が外側から拘束されることで、鋼管の外側への局部座屈
が防止され、また拘束によりコンクリートが高い圧縮強
度、靱性を発揮し、部材全体として力学的性能を飛躍的
に向上させることができる。
[0024] Further, in the portion where the stress of the concrete-filled steel pipe member is large, the steel pipe and the inside of the filled concrete are restrained from the outside, so that local buckling to the outside of the steel pipe is prevented. It exhibits strength and toughness, and can dramatically improve the mechanical performance of the entire member.

【0025】また、地震、火災等の被害を受けたコンク
リート充填鋼管部材についても、本構造を適用すること
により、容易に補修することができ、設計時の部材断面
性能に復帰させることができる。さらに、本発明の補強
構造は、柱等のコンクリート充填鋼管部材を構築する際
に適用する場合、既に構築されたコンクリート充填鋼管
部材に適用する場合の何れの場合も、コンクリート充填
鋼管部材を構成する鋼管の外側に施される補強であるた
め、施工が非常に簡単となる。
Also, the concrete-filled steel pipe member damaged by an earthquake, fire, or the like can be easily repaired by applying the present structure, and the member cross-sectional performance at the time of design can be restored. Furthermore, the reinforcement of the present invention
The structure is used when constructing concrete-filled steel pipe members such as columns.
When applied to the already built concrete filled steel pipe
When applied to components, concrete filling
The reinforcement is applied to the outside of the steel pipe that constitutes the steel pipe member.
Therefore, construction becomes very simple.

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

【図1】本発明の一実施例を示す鉛直断面図である。FIG. 1 is a vertical sectional view showing one embodiment of the present invention.

【図2】本発明の一実施例における水平断面図である。FIG. 2 is a horizontal sectional view in one embodiment of the present invention.

【図3】本発明の他の実施例における水平断面図であ
る。
FIG. 3 is a horizontal sectional view of another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1…補強鋼管、2…モルタル、3…コンクリート充填鋼
管部材、3a…円形鋼管、3b…角形鋼管、3c…充填
コンクリート、4…コンクリート充填鋼管柱、5…H形
断面梁
DESCRIPTION OF SYMBOLS 1 ... Reinforced steel pipe, 2 ... Mortar, 3 ... Concrete filled steel pipe member, 3a ... Circular steel pipe, 3b ... Square steel pipe, 3c ... Filled concrete, 4 ... Concrete filled steel pipe column, 5 ... H-section beam

───────────────────────────────────────────────────── フロントページの続き (72)発明者 大竹 章夫 東京都千代田区大手町一丁目1番3号 住友金属工業株式会社内 (72)発明者 松谷 輝雄 東京都千代田区神田駿河台2丁目3番11 号 株式会社鴻池組内 (72)発明者 中島 將好 東京都千代田区神田駿河台2丁目3番11 号 株式会社鴻池組内 (72)発明者 上田 弘樹 東京都千代田区神田駿河台2丁目3番11 号 株式会社鴻池組内 (72)発明者 富井 政英 東京都渋谷区代官山町20−14 代官山東 急アパートアネックス403 (56)参考文献 実開 平2−93421(JP,U) 実開 昭63−21301(JP,U) (58)調査した分野(Int.Cl.6,DB名) E04C 3/30 E04B 1/30 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akio Otake 1-3-1 Otemachi, Chiyoda-ku, Tokyo Sumitomo Metal Industries, Ltd. (72) Inventor Teruo Matsutani 2-3-1, Kanda Surugadai, Chiyoda-ku, Tokyo No. Konoike Gumi Co., Ltd. (72) Inventor Masayoshi Nakajima 2-3-11 Kanda Surugadai, Chiyoda-ku, Tokyo No.2 Konoike Gumi Co., Ltd. (72) Inventor Hiroki Ueda 2-3-11 Kanda Surugadai, Chiyoda-ku, Tokyo Co., Ltd. Konoike Gumi (72) Inventor Masahide Tomii 20-14 Daikanyamacho, Shibuya-ku, Tokyo Daikanyama Higashikyu Apartment Annex 403 (56) References Japanese Utility Model Application No. 2-93421 (JP, U) Japanese Utility Model Application No. Sho 63-21301 (JP, U) (58) Fields surveyed (Int.Cl. 6 , DB name) E04C 3/30 E04B 1/30

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 コンクリート充填鋼管部材の鋼管の外側
に、前記鋼管より径の大きい補強鋼管を長手方向所要区
間にわたって配置し、前記鋼管外面と前記補強鋼管内面
との間に硬化材を充填することにより、前記コンクリー
ト充填鋼管部材を構成する鋼管及びコンクリートの外側
への変形を、前記補強鋼管及び硬化材により拘束した
とを特徴とするコンクリート充填鋼管部材の補強構造。
The outer steel pipe 1. A concrete filled steel tube member, to a large reinforcement steel pipe diameter than the steel pipe disposed along the longitudinal direction required interval, to fill the hardening material between the steel pipe outer surface and the reinforcing steel pipe inner surface By the concrete
Outside of steel pipe and concrete that make up the steel tube member
A structure for reinforcing a concrete-filled steel pipe member, characterized in that deformation of the steel pipe is restricted by the reinforcing steel pipe and a hardening material .
JP4106562A 1992-04-24 1992-04-24 Reinforcement structure of concrete filled steel pipe member Expired - Lifetime JP2977994B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4106562A JP2977994B2 (en) 1992-04-24 1992-04-24 Reinforcement structure of concrete filled steel pipe member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4106562A JP2977994B2 (en) 1992-04-24 1992-04-24 Reinforcement structure of concrete filled steel pipe member

Publications (2)

Publication Number Publication Date
JPH06167073A JPH06167073A (en) 1994-06-14
JP2977994B2 true JP2977994B2 (en) 1999-11-15

Family

ID=14436745

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4106562A Expired - Lifetime JP2977994B2 (en) 1992-04-24 1992-04-24 Reinforcement structure of concrete filled steel pipe member

Country Status (1)

Country Link
JP (1) JP2977994B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5655738B2 (en) * 2010-12-06 2015-01-21 新日鐵住金株式会社 Reinforced structure of square steel pipe column
JP5762155B2 (en) * 2011-06-08 2015-08-12 株式会社竹中工務店 Concrete filled steel pipe column
JP5903792B2 (en) * 2011-07-25 2016-04-13 株式会社プロテックエンジニアリング Load bearing material
KR101579269B1 (en) * 2014-09-02 2015-12-21 서정표 Attachable Reinforcing Member and Reinforcing Structure Using the Same
CN107514096A (en) * 2017-09-21 2017-12-26 华侨大学 A kind of steel epoxy resin mortar multiple tube concrete combination column

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0450723Y2 (en) * 1986-07-25 1992-11-30
JPH0723455Y2 (en) * 1989-01-13 1995-05-31 大成建設株式会社 Steel pipe concrete pillar

Also Published As

Publication number Publication date
JPH06167073A (en) 1994-06-14

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