JPH0418098B2 - - Google Patents
Info
- Publication number
- JPH0418098B2 JPH0418098B2 JP5661185A JP5661185A JPH0418098B2 JP H0418098 B2 JPH0418098 B2 JP H0418098B2 JP 5661185 A JP5661185 A JP 5661185A JP 5661185 A JP5661185 A JP 5661185A JP H0418098 B2 JPH0418098 B2 JP H0418098B2
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- load
- fixing
- reinforcing bars
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 44
- 239000010959 steel Substances 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 30
- 239000004568 cement Substances 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 description 15
- 238000005452 bending Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
Landscapes
- Rod-Shaped Construction Members (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
この発明は大きな曲げ及び軸圧縮力を受ける杭
又は柱等に使用する高強度構造体に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a high-strength structure used for piles, columns, etc. that are subjected to large bending and axial compressive forces.
従来技術
杭、柱等は大きな曲げ及び軸圧縮力を受け、極
めて高強度であることが要求される。高強度を得
るためには構造体自体を大きく太くすればよいの
であるが、しかし一方杭、柱等はスペースを制限
されたところに使用するものであり、著しく巨大
なものは使用できず、また大径孔の削孔、大型施
工機械の使用等によつて費用が著しく高くなると
いう問題が生ずる。Prior Art Piles, columns, etc. are subjected to large bending and axial compressive forces and are required to have extremely high strength. In order to obtain high strength, it is sufficient to make the structure itself large and thick, but on the other hand, piles, columns, etc. are used in places with limited space, and extremely large ones cannot be used. Drilling large diameter holes and using large construction machines poses the problem of significantly higher costs.
このような問題点を改善するために、本発明者
はよつて第６図に示すような鋼管ａ内に異形鉄筋
ｂ等の耐力鋼材を配設し、コンクリートｃ等のセ
メント系硬化材を充填した構造体が開発されてい
る。 In order to improve these problems, the present inventor placed load-bearing steel materials such as deformed reinforcing bars B in a steel pipe a as shown in Fig. 6, and filled it with a cement-based hardening material such as concrete c. A new structure has been developed.
該構造体は鋼管及び耐力鋼材によつて引張り力
に対応し、セメント系硬化材によつて圧縮力に耐
え得るようにしたもので、極めて大きな強度が得
られるものである。 The structure is made of steel pipes and load-bearing steel materials to withstand tensile forces, and cement-based hardening materials to withstand compressive forces, resulting in extremely high strength.
この発明が解決すべき問題点
しかし耐力鋼材として高強度鉄筋を使用する場
合において特に、鉄筋とコンクリートの強度に大
きな差が生じ、コンクリートの伸縮に鉄筋が追随
していけず、第７図に示すようにコンクリートと
鉄筋の付着切れが生ずるという問題がある。Problems to be solved by this invention However, especially when using high-strength reinforcing bars as load-bearing steel materials, there is a large difference in strength between the reinforcing bars and concrete, and the reinforcing bars cannot follow the expansion and contraction of the concrete, as shown in Figure 7. There is a problem in that the adhesion between concrete and reinforcing steel breaks.
例えばコンクリートの圧縮強度が200〜400Kg／
cm2で、鉄筋の許容応力度が1800〜2200Kg／cm2程度
では、数十センチ程度の付着長で鉄筋を固定する
ことが可能であるが、鉄筋の許容応力度が5000〜
10000Kg／cm2程度以上である場合は、強度差及び
付着切れの進行によつて３ｍ以上の定着長が必要
である。 For example, the compressive strength of concrete is 200 to 400 kg/
cm 2 and the allowable stress of reinforcing bars is around 1800 to 2200 kg/cm 2 , it is possible to fix the reinforcing bars with an attachment length of several tens of centimeters, but when the allowable stress of reinforcing bars is around 5000 to 2200 kg/cm 2
If it is about 10,000 kg/cm 2 or more, a fixing length of 3 m or more is required due to the difference in strength and the progress of adhesion breakage.
これは具体的に第８図に示すように長さｌが６
ｍの構造体があつたとすれば、その部材の中央よ
り片側３ｍづつが固定部即ち付着長となることで
ある。この構造体中央の最大曲げモーメントによ
つて発生した鉄筋応力に耐え得る鉄筋の付着長が
３ｍ必要ということである。逆に言うとこれより
も部材の長さを短くすることが出来ないと言うこ
とである。 Specifically, the length l is 6 as shown in Figure 8.
If there is a structure of m, the fixed part, that is, the attachment length, is 3 m on each side from the center of the member. This means that the attached length of the reinforcing bars must be 3 m to withstand the reinforcing bar stress generated by the maximum bending moment at the center of the structure. Conversely, this means that the length of the member cannot be made shorter than this.
これより構造体を短くした場合にはその中に入
つている鉄筋は第６図のように最初の位置の状態
から第７図のように付着切れという現象によつて
コンクリートの拘束から解放されて、上側の圧縮
側に配置されている鉄筋は外側へ突出し、逆に下
側の引張側に配置されている鉄筋は内側に引込ま
れるということになる。 If the structure is made shorter than this, the reinforcing bars contained within it will be released from the restraints of the concrete due to the phenomenon of bond breakage, as shown in Fig. 7, from the initial position shown in Fig. 6. , reinforcing bars placed on the upper compression side will protrude outward, while reinforcing bars placed on the lower tension side will be pulled inward.
従つて鉄筋は付着長が短かすぎて部材において
固定が確保できず、コンクリートと鉄筋との一体
化した働きができず、構造体としての特性は著し
く低下することになる。 Therefore, the attachment length of the reinforcing bars is too short to ensure fixation in the member, and the concrete and reinforcing bars cannot function as one, resulting in a significant deterioration of the properties of the structure.
これらの問題を改善するために、耐力鋼材の端
部にナツトを螺合したり、鋼管に溶接して、鋼材
を全体の曲げや引張りに追随させて付着切れを防
ごうとする発明が存在する。 In order to improve these problems, there are inventions in which nuts are screwed onto the ends of load-bearing steel materials, or welded to steel pipes, so that the steel material follows the bending and tension of the entire material to prevent bond breakage. .
しかしナツトをを螺合するのは引張りすなわち
引込まれる方向には有効であつても、圧縮、すな
わち突出する方向には有効でなく、また溶接する
のは両方の場合に有効であるが、鋼材の材質を低
下させるという問題がある。 However, although screwing nuts together is effective in tension, or pulling in, it is not effective in compression, or protruding, and welding is effective in both cases, but steel There is a problem of degrading the quality of the material.
問題点を解決するための手段
この発明は、鋼管の両端部内周に各々定着部を
突設し、該定着部に形成した挿通孔に、鋼管内に
配設する耐力鋼材の外周に雄ねじが螺設された端
部を前記定着部の挿通孔に挿通して、定着部の左
右両面からナツトによつて端部を定着部に定着
し、鋼管内にセメント系硬化材を充填することに
より、耐力鋼材の質を低下させずに鋼材を構造体
の曲げに追随させようとするものである。Means for Solving the Problems This invention provides fixing parts protruding from the inner periphery of both ends of a steel pipe, and a male screw is screwed into the outer periphery of a load-bearing steel material disposed inside the steel pipe into an insertion hole formed in the fixing parts. By inserting the provided end into the insertion hole of the fixing section, fixing the end to the fixing section with nuts from both the left and right sides of the fixing section, and filling the steel pipe with a cement-based hardening material, the yield strength is increased. This is an attempt to make the steel material follow the bending of the structure without degrading the quality of the steel material.
実施例
以下図に示す一実施例に基づき、この発明を詳
細に説明する。Embodiment The present invention will be described in detail below based on an embodiment shown in the drawings.
図において１は鋼管である。鋼管１は円筒形、
角筒形様々な形状のものが使用できる。 In the figure, 1 is a steel pipe. Steel pipe 1 is cylindrical,
A variety of prismatic cylinder shapes can be used.
該鋼管１の両端部内周に定着部２が各々突設さ
れている。定着部２としては実施例では輪状に形
成された板体が内鍔状に取付けられている。 Fixing portions 2 are provided protruding from the inner periphery of both ends of the steel pipe 1, respectively. In the embodiment, the fixing section 2 is a ring-shaped plate attached to the inner flange.
定着部２には円周方向に適宜間隔離れて、複数
の挿通孔３が穿設されている。定着部２，２の挿
通孔３には鋼管１内に配設する耐力鋼材４の端部
が挿通されている。耐力鋼材４としては通常の鉄
筋の他、高強度異形鋼棒、鋼より線等が使用でき
る。 A plurality of insertion holes 3 are formed in the fixing portion 2 at appropriate intervals in the circumferential direction. An end portion of a load-bearing steel material 4 disposed within the steel pipe 1 is inserted into the insertion hole 3 of the fixing portions 2 , 2 . As the load-bearing steel material 4, in addition to ordinary reinforcing bars, high-strength deformed steel bars, stranded steel wires, etc. can be used.
耐力鋼材４の両端部外周には雄ねじ５が螺設さ
れており、定着部２の両面に位置されたナツト
６，６が耐力鋼材４の雄ねじ５に螺合されて鋼材
４が固定されている。 Male screws 5 are screwed on the outer periphery of both ends of the load-bearing steel material 4, and nuts 6, 6 located on both sides of the fixing part 2 are screwed into the male screws 5 of the load-bearing steel material 4, thereby fixing the steel material 4. .
以上のような鋼管１内にコンクリート、モルタ
ル等のセメント系硬化材７が充填されている。 The steel pipe 1 as described above is filled with a cement hardening material 7 such as concrete or mortar.
この発明にかかる高強度構造体は、以上のよう
な構成を有し、構造体に曲げ応力が生じたとき、
耐力鋼材４の両端が強固に鋼管１に固定している
ため、構造体１の曲げに追随して伸縮し、付着切
れが発生し難くなる。 The high-strength structure according to the present invention has the above configuration, and when bending stress occurs in the structure,
Since both ends of the load-bearing steel material 4 are firmly fixed to the steel pipe 1, it expands and contracts following the bending of the structure 1, making it difficult for adhesion to break.
従つて構造体自体の長さが短くとも耐力鋼材４
は本来の機能を損うようなことがない。 Therefore, even if the length of the structure itself is short, the load-bearing steel material 4
does not impair its original function.
鋼管１に定着部２を固定するのは、耐力鋼材４
を固定する以前であつてもよく、また予め耐力鋼
材４の両端をナツト６，６によつて定着部２に固
定しておき、その後定着部２を鋼管１に溶接によ
つて固定してもよい。 The fixing part 2 is fixed to the steel pipe 1 using a load-bearing steel material 4.
Alternatively, both ends of the load-bearing steel material 4 may be fixed to the fixing section 2 with nuts 6, 6 in advance, and then the fixing section 2 may be fixed to the steel pipe 1 by welding. good.
発明の効果
この発明は以上のような構成を有し、鋼管の両
端部内周に定着具を固定し、その定着具にナツト
によつて耐力鋼材を固定するため、耐力鋼材の質
を低下させずに、構造体全体の伸縮に充分追随し
て行け、硬化材との付着切れを小さくできるた
め、構造体自体の長さを短くすることができる。Effects of the Invention This invention has the above-described configuration, and since a fixing device is fixed to the inner periphery of both ends of a steel pipe and a load-bearing steel material is fixed to the fixing device with a nut, the quality of the load-bearing steel material is not deteriorated. In addition, the length of the structure itself can be shortened because it can sufficiently follow the expansion and contraction of the entire structure and less breakage of adhesion to the hardening material.
第１図はこの発明の高強度構造体の一実施例の
縦断面図、第２図はその一部拡大図、第３図〜第
５図は第１図の−，−，−線各断面
図、第６図及び第７図は従来例の縦断面図、第８
図は構造体の曲げモーメントを示す説明図であ
る。
１…鋼管、２…定着部、３…挿通孔、４…耐力
鋼材、５…雄ねじ、６…ナツト、７…セメント系
硬化材。
FIG. 1 is a longitudinal sectional view of one embodiment of the high-strength structure of the present invention, FIG. 2 is a partially enlarged view thereof, and FIGS. 3 to 5 are cross sections taken along the lines -, -, and - in FIG. Figures 6 and 7 are longitudinal sectional views of the conventional example;
The figure is an explanatory diagram showing the bending moment of the structure. DESCRIPTION OF SYMBOLS 1... Steel pipe, 2... Fixing part, 3... Insertion hole, 4... Load-bearing steel material, 5... Male thread, 6... Nut, 7... Cement-based hardening material.
Claims (1)
定着部に形成した挿通孔に、鋼管内に配設する耐
力鋼材の外周に雄ねじが螺設された端部を前記定
着部の挿通孔に挿通して、定着部の左右両面から
ナツトによつて端部を定着部に定着し、鋼管内に
セメント系硬化材を充填したことを特徴とする高
強度構造体。1 A fixing part is provided protrudingly on the inner periphery of both ends of a steel pipe, and the end part of a load-bearing steel material disposed inside the steel pipe with a male thread screwed on the outer periphery is inserted into the insertion hole formed in the fixing part. A high-strength structure, characterized in that the steel pipe is inserted into a hole, the ends are fixed to the fixing part by nuts from both the right and left sides of the fixing part, and the steel pipe is filled with a cement-based hardening material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5661185A JPS61216960A (en) | 1985-03-20 | 1985-03-20 | High strength structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5661185A JPS61216960A (en) | 1985-03-20 | 1985-03-20 | High strength structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61216960A JPS61216960A (en) | 1986-09-26 |
| JPH0418098B2 true JPH0418098B2 (en) | 1992-03-26 |
Family
ID=13032040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5661185A Granted JPS61216960A (en) | 1985-03-20 | 1985-03-20 | High strength structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61216960A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6475763A (en) * | 1987-09-17 | 1989-03-22 | Takenaka Komuten Co | Filling type steel-pipe concrete member |
| KR100914742B1 (en) * | 2007-07-02 | 2009-08-31 | 강종구 | A module of prefabricated building and a construction system using the same and a method of construction |
-
1985
- 1985-03-20 JP JP5661185A patent/JPS61216960A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61216960A (en) | 1986-09-26 |
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