JPS61176752A - Reinforced concrete member - Google Patents
Reinforced concrete memberInfo
- Publication number
- JPS61176752A JPS61176752A JP1623085A JP1623085A JPS61176752A JP S61176752 A JPS61176752 A JP S61176752A JP 1623085 A JP1623085 A JP 1623085A JP 1623085 A JP1623085 A JP 1623085A JP S61176752 A JPS61176752 A JP S61176752A
- Authority
- JP
- Japan
- Prior art keywords
- reinforced concrete
- concrete member
- present
- main
- main reinforcements
- 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
Links
Landscapes
- Rod-Shaped Construction Members (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は柱、梁等に用いる鉄筋コンクリート部材に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to reinforced concrete members used for columns, beams, etc.
（従来の技術）
従来においては第１１図及び第１２図に一例を示す様に
柱、梁等に用いる鉄筋コンクリート部材（７）は対向す
る両側部に配置され長手方向に走る１対の主筋（８ａ）
（８ｂ）又は主筋（８ａ）（８ｂ）群（図示のものは主
筋（８ａ）が２本及び主筋（８ｂ）が２本）を有してい
る。(Prior Art) Conventionally, as shown in FIGS. 11 and 12, a reinforced concrete member (7) used for columns, beams, etc. has a pair of main reinforcements (8a) arranged on opposite sides and running in the longitudinal direction. )
(8b) or a group of main reinforcements (8a) and (8b) (the illustrated one has two main reinforcements (8a) and two main reinforcements (8b)).
この様な鉄筋コンクリート部材（７）においては特にシ
アスパン比（Ｍ／ＱＤＳＭ：モーメント、Ｑ：剪断力、
Ｄ二部材の断面縦寸法）の小さい部材（スハンの短い境
界梁、短い柱等）について地震時に剪断破壊が生じる危
険があった。In such reinforced concrete members (7), the shear span ratio (M/QDSM: moment, Q: shear force,
There was a risk that shear failure would occur during an earthquake for members with small (cross-sectional vertical dimensions of D2 members) (short boundary beams, short columns, etc.).
（発明が解決しようとする問題点）
本発明は以上の従来の問題を解決し剪断抵抗及び靭性（
吸収する歪エネルギー〕の大きい鉄筋コンクリート部材
の提供を目的とする。(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and improves shear resistance and toughness (
The purpose of the present invention is to provide a reinforced concrete member that absorbs a large amount of strain energy.
（実施例）
以下本発明の鉄筋コンクリート部材を図面に示す実施例
に従い説明する。(Example) The reinforced concrete member of the present invention will be described below according to an example shown in the drawings.
第１図乃至第３図は本発明の鉄筋コンクリート部材を示
し、該鉄筋コンクリート部材＋１＋は対向する両側部（
図面の上下側部）の各々において長手方向に走る少くと
も１対すなわち１対の主筋（３ａ）（３ｂ）又は主筋（
３ａ）（３ｂ）群（図示のものは主筋（３ａ）が２本及
び主筋（３ｂ）が２本）を有する。FIGS. 1 to 3 show a reinforced concrete member of the present invention, and the reinforced concrete member +1+ has opposite sides (
At least one pair of main reinforcements (3a) (3b) or main reinforcements (
3a) (3b) groups (the illustrated one has two main reinforcements (3a) and two main reinforcements (3b)).
該主筋Ｃ３８）Ｃ３ｂ）又は主筋（３ａ） （３ｂ）群
は長手方向端部近くにおいて相互に交差してコンクリー
トｉ２１内に埋め込まれている。The main reinforcements C38), C3b) or groups of main reinforcements (3a) and (3b) are embedded in the concrete i21 so as to cross each other near the longitudinal ends.
以上の実施例に示した本発明の鉄筋コンクリート部材の
作用を次に説明する。The operation of the reinforced concrete member of the present invention shown in the above embodiments will be explained next.
すなわち鉄筋コンクリート部材ｔ１＋が梁として用いら
れた場合の地震時の状態を第７図乃至第１０図に示す。That is, the state at the time of an earthquake when the reinforced concrete member t1+ is used as a beam is shown in FIGS. 7 to 10.
まず第７図及び第８図は力Ｆの方向が左方に向いた場合
であり、この場合のモーメントＭ分布及び仮想剪断ひび
割れ面θ匂は図示の通りである。First, FIGS. 7 and 8 show the case where the direction of the force F is directed to the left, and the moment M distribution and the virtual shear crack plane θ in this case are as shown.
この仮想剪断ひび割れ面（１２）に注目すれば明らかな
様にこれは鉄筋コンクリート部材＋１＋の左端部近くに
おいて主筋（３ｂ）の傾斜部を横切る一方右端部近くに
おいて主筋（３ａ）の傾斜部を横切っている。As is clear from this virtual shear crack surface (12), it crosses the slope of the main reinforcement (3b) near the left end of the reinforced concrete member +1+, while it crosses the slope of the main reinforcement (3a) near the right end. There is.
この結果主筋（３ａ）（３ｂ）の交差部によって剪断抵
抗が増大されていることが理解される。As a result, it is understood that the shear resistance is increased by the intersection of the main reinforcements (3a) and (3b).
一方主筋（３ａ）（３ｂ）の交差部においては該主筋（
３ａ）（３ｂ）が横断面内の内方に位置しているために
鉄筋コンクリート部材（１）自体の断面係数は小さくな
っている。On the other hand, at the intersection of main reinforcements (3a) and (3b), the main reinforcements (
3a) and (3b) are located inward in the cross section, the section modulus of the reinforced concrete member (1) itself is small.
このため交差部における曲げ耐力はそれ以外の部分と比
較して小さい。Therefore, the bending strength at the intersection is smaller than at other parts.
以上の剪断抵抗の増大及び曲げ耐力の減少の両者に起因
して鉄筋コンクリート部材ｆｉ＋はその靭性が増大して
いるのである。The toughness of the reinforced concrete member fi+ is increased due to both the increase in shear resistance and the decrease in bending strength.
この結果地震時に力Ｆの方向が左右（第７図及び第８図
の状態と第９図及び第１０図の伏聾ンに繰り返されても
鉄筋コンクリート部材＋１１は破壊しないのである。As a result, the reinforced concrete member +11 does not break even if the direction of the force F during an earthquake is repeated from left to right (the state shown in FIGS. 7 and 8 and the state shown in FIGS. 9 and 10).
第４図乃至第６図は本発明の他の鉄筋コンクリート部材
を示し、該鉄筋コンクリート部材ｔ１＋は第１図乃至第
３図のものと比較して次の特徴を有する０
すなわち主筋（３ａ）（３ｂ）屏息外にスパイラル筋（
５）が用いられ吸収する歪エネルギー等においてより改
良されたものとなっている。Figures 4 to 6 show another reinforced concrete member of the present invention, and the reinforced concrete member t1+ has the following characteristics compared to the one in Figures 1 to 3. Spiral muscles outside the folding breath (
5) is used, and the strain energy absorbed is further improved.
（発明の効果）
本発明の鉄筋コンクリート部材の実施例は以上の通りで
ありその効果を次に列記する。(Effects of the Invention) The embodiments of the reinforced concrete member of the present invention are as described above, and the effects thereof are listed below.
＋１＋ 本発明の鉄筋コンクリート部材は特許請求の
範囲に記載した構成であり、特に長手方向端部近くにお
いて相互に交差した少くとも１対の主筋を有するため該
交差部において剪断抵抗が増大し剪断破壊が生じない。+1+ The reinforced concrete member of the present invention has the structure described in the claims, and has at least one pair of main reinforcements that intersect with each other, especially near the longitudinal ends, so that shear resistance increases at the intersection and shear failure occurs. Does not occur.
（２） 本発明の鉄筋コンクリート部材は同上の構成
であり、特に長手力向端部近奇において相互に交差した
少くとも１対の主筋を有するため該交差部において曲げ
耐力が減少し、その結果前述の剪断抵抗の増大と相まっ
て靭性が増大し耐震設計に極めて有効である。(2) The reinforced concrete member of the present invention has the same configuration as above, and has at least one pair of main reinforcing bars that intersect with each other, especially near the ends in the longitudinal direction, so that the bending strength decreases at the intersection, and as a result, the above-mentioned Coupled with an increase in shear resistance, the toughness increases and is extremely effective for seismic design.
第１図は本発明の鉄筋コンクリート部材の長手方向断面
図
第２図は第１図ｕ−ｎ断面図
第３図は同上■−■断面図
第４図は本発明の他の鉄筋コンクリート部材の長手方向
断面図
第５図は第４図ｖ−■断面図
第６図は同上■−■断面図
第７図乃至第１０図は第１図の鉄筋コンクリート部材を
梁として用いた場合の地震時の伏恵図第１１図は従来の
鉄筋コンクリート部材の一例を示す長手方向断面図
第１２図は第１１図ＸＩ−？−■断面図１・・・鉄筋コ
ンクリート部材２・・・コンクリート３ａ・・・主筋
３ｂ・・・主筋５・・・スパイラル筋
７・・・鉄筋コンクリート部材８ａ・・・主筋
８ｂ・・・主筋９・・・コンクリート １
０・・・スパイラル筋１２・・・仮想剪断ひび割れ面Fig. 1 is a longitudinal sectional view of a reinforced concrete member of the present invention Fig. 2 is a sectional view taken along the line u-n in Fig. 1 Fig. 3 is a sectional view taken along the same line ■-■ Fig. 4 is a longitudinal sectional view of another reinforced concrete member of the present invention Figure 5 is a cross-sectional view of Figure 4. Figure 6 is a cross-sectional view of Figure 4. Figure 6 is a cross-sectional view of the same as above. Figure 11 is a longitudinal sectional view showing an example of a conventional reinforced concrete member; Figure 12 is Figure 11; -■ Cross section 1...Reinforced concrete member 2...Concrete 3a...Main reinforcement
3b...Main muscle 5...Spiral muscle
7...Reinforced concrete member 8a...Main reinforcement
8b...Main reinforcement 9...Concrete 1
0...Spiral line 12...Virtual shear crack surface
Claims (1)
に埋め込まれ長手方向端部近くにおいて相互に交差した
少くとも１対の主筋を有する鉄筋コンクリート部材1. A reinforced concrete member having at least one pair of main bars running longitudinally on opposing sides and embedded in the concrete and intersecting each other near the longitudinal ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60016230A JPH0718205B2 (en) | 1985-01-29 | 1985-01-29 | Reinforced concrete member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60016230A JPH0718205B2 (en) | 1985-01-29 | 1985-01-29 | Reinforced concrete member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61176752A true JPS61176752A (en) | 1986-08-08 |
| JPH0718205B2 JPH0718205B2 (en) | 1995-03-01 |
Family
ID=11910744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60016230A Expired - Lifetime JPH0718205B2 (en) | 1985-01-29 | 1985-01-29 | Reinforced concrete member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0718205B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6429558A (en) * | 1987-07-25 | 1989-01-31 | Shimizu Construction Co Ltd | Reinforced concrete beam |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5774449A (en) * | 1980-10-25 | 1982-05-10 | Kinji Tateno | Construction of enclosure |
-
1985
- 1985-01-29 JP JP60016230A patent/JPH0718205B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5774449A (en) * | 1980-10-25 | 1982-05-10 | Kinji Tateno | Construction of enclosure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6429558A (en) * | 1987-07-25 | 1989-01-31 | Shimizu Construction Co Ltd | Reinforced concrete beam |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0718205B2 (en) | 1995-03-01 |
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