JPH0718205B2 - Reinforced concrete member - Google Patents
Reinforced concrete memberInfo
- Publication number
- JPH0718205B2 JPH0718205B2 JP60016230A JP1623085A JPH0718205B2 JP H0718205 B2 JPH0718205 B2 JP H0718205B2 JP 60016230 A JP60016230 A JP 60016230A JP 1623085 A JP1623085 A JP 1623085A JP H0718205 B2 JPH0718205 B2 JP H0718205B2
- Authority
- JP
- Japan
- Prior art keywords
- reinforced concrete
- concrete member
- main
- main bars
- bars
- 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
Links
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- Rod-Shaped Construction Members (AREA)
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。TECHNICAL FIELD The present invention relates to a reinforced concrete member used for columns, beams, and the like.
（従来の技術） 従来においては第11図及び第12図に一例を示すように
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一対の主筋（8a）
（8b）又は主筋（8a）（8b）群（図示のものは主筋（8
a）が２本及び主筋（8b）が２本）を有している。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/QD、M:モーメント、Q:剪断力、D:部材の断面
縦寸法）の小さい部材（スパンの短い境界梁、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。(Prior Art) Conventionally, as shown in FIG. 11 and FIG. 12, as an example, reinforced concrete members (7) used for columns, beams, etc. are arranged on opposite sides, and a pair of main bars (8a) running in the longitudinal direction.
(8b) or main bar (8a) (8b) group (the main bar (8b)
a) has two and the main bar (8b) has two). In such reinforced concrete members (7), especially those with a small shear span ratio (M / QD, M: moment, Q: shearing force, D: longitudinal cross-sectional dimension of member) (boundary beam with short span, short column, etc.) There was a risk of shear failure during an earthquake.
一方特開昭57-74449号が公知であるが該公報に示された
ものは梁の端部近くで曲げの中心において交差した鉄筋
が示されるが交差鉄筋以外に水平鉄筋が曲げの外側及び
内側を通っており梁の靱性増大といる点において効果は
ほとんど期待出来ずむしろ該公報に示されたものの目的
は梁の軽量プレキャスト化にあって本発明の目的とは関
係ないものと思われる。On the other hand, JP-A-57-74449 is known, but the one disclosed in the publication shows a reinforcing bar crossing at the center of bending near the end of the beam, but horizontal reinforcing bars other than the crossing reinforcing bar are outside and inside the bending. It is considered that the effect of increasing the toughness of the beam cannot be expected, and the purpose of the one disclosed in this publication is to make the beam lightweight precast and has no relation to the purpose of the present invention.
（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靱性
（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) An object of the present invention is to solve the above conventional problems and provide a reinforced concrete member having large shear resistance and toughness (strain energy to be absorbed).
（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) Hereinafter, the reinforced concrete member of this invention is demonstrated according to the Example shown in drawing.
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
とも一対すなわち一対の主筋（3a）（3b）又は主筋（3
a）（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。1 to 3 show a reinforced concrete member of the present invention, wherein the reinforced concrete member (1) runs in the longitudinal direction on each of opposite sides (upper and lower sides in the drawing) of at least one pair, that is, a pair of main bars (3a). ) (3b) or main muscle (3
a) (3b) group (in the figure, two main bars (3a) and two main bars (3b)).
該主筋（3a）（3b）又は主筋（3a）（3b）群は、柱材端
部付近においては柱の中心部で相互に交差し、梁材端部
付近においては梁成の中心部で相互に交差してコンクリ
ート（２）内に埋め込まれているとともに、主筋交差部
分には交差する該主筋（3a）（3b）又は該主筋（3a）
（3b）群以外には鉄筋を配置していない。The main reinforcements (3a) (3b) or the main reinforcements (3a) (3b) group intersect each other at the center of the column near the end of the column material and at the center of beam formation near the end of the beam. The main bars (3a) (3b) or the main bars (3a) which are embedded in the concrete (2) by intersecting with the main bar and which intersect at the main bar crossing part.
(3b) No rebar is placed in any other group.
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
作用を次ぎに説明する。The operation of the reinforced concrete member of the present invention shown in the above embodiment will be described below.
すなわち鉄筋コンクリート部材（１）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, Fig. 7 to Fig. 10 show the state of an earthquake when the reinforced concrete member (1) is used as a beam.
まず第７図及び第８図は力Ｆの方向が左右に向いた場合
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（12）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 right, and the moment M distribution and the virtual shear crack surface (12) 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）の左端部付近にお
いて主筋（3b）の傾斜部を横切る一方右端部付近におい
て主筋（3a）の傾斜部を横切っている。As is clear from the observation of this virtual shear crack surface (12), it crosses the inclined part of the main bar (3b) near the left end of the reinforced concrete member (1), while it crosses the inclined part of the main bar (3a) near the right end. Crossing.
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 bars (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 the main bars (3a) and (3b), the main bars (3a)
The section modulus of the reinforced concrete member (1) itself is small because (3b) is located inside the cross section.
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 that at other portions.
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（１）はその靱性が増大して
いるのである。The toughness of the reinforced concrete member (1) is increased due to both the increase in shear resistance and the decrease in bending resistance.
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図の状態）に繰り返されても鉄
筋コンクリート部材（１）は破壊しないのである。As a result, the reinforced concrete member (1) does not break even if the direction of the force F is repeated right and left (states of FIGS. 7 and 8 and states of FIGS. 9 and 10) during an earthquake.
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
を示す、該鉄筋コンクリート部材（１）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。4 to 6 show another reinforced concrete member of the present invention. The reinforced concrete member (1) has the following features as compared with those of FIGS. 1 to 3.
すなわち主筋（3a）（3b）群以外にスパイラル筋（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。That is, in addition to the main muscles (3a) (3b) group, spiral muscles (5)
Is used and the strain energy absorbed is 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 examples 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、特に柱材端部付近においては
柱の中心部で相互に交差した少くとも一対の主筋を有し
ており、梁材端部付近においては梁成の中心部で相互に
交差した少くとも一対の主筋を有しており、かつ主筋交
差部分には交差する主筋以外には鉄筋を配置していない
ため該交差部において曲げ耐力が減少して靱性が増大し
耐震設計に極めて有効である。(1) The reinforced concrete member of the present invention has the structure described in the claims, and in particular, in the vicinity of the end of the column member, it has at least a pair of main bars intersecting each other at the center of the column member. Since there is at least a pair of main bars that intersect each other at the center of the beam formation near the ends and there is no reinforcing bar other than the main bars that intersect at the main bar intersection, bending at the intersection It is extremely effective for seismic design because the yield strength decreases and the toughness increases.
（２） 本発明の鉄筋コンクリート部材は同上の構成で
あり、特に柱材端部付近においては柱の中心部で相互に
交差した少くとも一対の主筋を有しており、梁材端部付
近においては梁成の中心部で相互に交差した少くとも一
対の主筋を有しており、かつ主筋交差部分には交差する
主筋以外には鉄筋を配置していないため該交差部におい
て剪断抵抗のみが増大し剪断破壊が生じない。(2) The reinforced concrete member of the present invention has the same structure as above, and particularly has at least a pair of main bars intersecting each other at the center of the column near the end of the column, and near the end of the beam. Since it has at least a pair of main bars that intersect each other at the center of the beam, and no reinforcing bars are arranged at the intersections of the main bars except the intersecting main bars, only shear resistance increases at the intersection. No shear failure occurs.
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II-II断面図 第３図は同上III-III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−Ｖ断面図 第６図は同上VI-VI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状態図 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XII-XII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、10: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 of Fig. 1 II-II. Fig. 3 is a sectional view of III-III of the above. Fig. 4 is a longitudinal direction of another reinforced concrete member of the present invention. Sectional view Fig. 5 Fig. 4 VV sectional view Fig. 6 Same as above VI-VI sectional view Figs. 7 to 10 are state diagrams during an earthquake when the reinforced concrete members of Fig. 1 are used as beams. Fig. 11 is a longitudinal sectional view showing an example of a conventional reinforced concrete member. Fig. 12 is Fig. 11 XII-XII sectional view 1: Reinforced concrete member 2: Concrete 3a: Main bar, 3b: Main bar 5: Spiral bar, 7: Reinforced concrete Member 8a: Main bar, 8b: Main bar 9: Concrete, 10: Spiral bar 12: Virtual shear crack surface
Claims (1)
あって、該鉄筋コンクリート部材の主筋が対向する両側
部を長手方向に走ってコンクリート内に埋め込まれてお
り、柱材端部付近においては柱の中心部で相互に交差し
た少くとも一対の主筋を有しており、梁材端部付近にお
いては梁成の中心部で相互に交差した少くとも一対の主
筋を有しており、かつ 主筋交差部分には交差する主筋
以外には鉄筋を配置していないことを特長とする鉄筋コ
ンクリート部材1. A reinforced concrete member used for pillars and beams, wherein main bars of the reinforced concrete member run in opposite directions on both sides in the longitudinal direction and are embedded in concrete, and near the end of the pillar material, It has at least one pair of main bars intersecting each other at the center, and at least one pair of main bars intersecting each other at the center of the beam formation near the end of the beam, and the intersection of the main bars. Reinforced concrete members characterized in that no reinforcing bars are placed other than the intersecting main bars
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 JPS61176752A (en) | 1986-08-08 |
| JPH0718205B2 true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH081083B2 (en) * | 1987-07-25 | 1996-01-10 | 清水建設株式会社 | Reinforced concrete beams |
Family Cites Families (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61176752A (en) | 1986-08-08 |
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