JPH033719Y2 - - Google Patents
Info
- Publication number
- JPH033719Y2 JPH033719Y2 JP8894785U JP8894785U JPH033719Y2 JP H033719 Y2 JPH033719 Y2 JP H033719Y2 JP 8894785 U JP8894785 U JP 8894785U JP 8894785 U JP8894785 U JP 8894785U JP H033719 Y2 JPH033719 Y2 JP H033719Y2
- Authority
- JP
- Japan
- Prior art keywords
- column
- floor
- reinforcement
- bending
- reinforced concrete
- 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
- 230000002787 reinforcement Effects 0.000 claims description 28
- 239000011150 reinforced concrete Substances 0.000 claims description 9
- 238000005452 bending Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Rod-Shaped Construction Members (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は鉄筋コンクリート耐震構造に係るもの
である。[Detailed description of the invention] (Field of industrial application) The invention relates to a reinforced concrete earthquake-resistant structure.
（従来の技術）
現在構造物の耐震設計において、構造物は明確
な崩壊メカニズムを有する靭性のある骨組を理想
とする設計に移行してきている。(Prior Art) Currently, in the seismic design of structures, there has been a shift towards a design in which the ideal structure is a tough frame with a clear collapse mechanism.
特に鉄筋コンクリートラーメン構造の中高層建
物においては、明確な梁降伏先行型メカニズムを
形成する設計法を確立する方向に進んでいる。 Particularly for medium- and high-rise buildings with reinforced concrete rigid frame structures, progress is being made in the direction of establishing a design method that creates a clear beam-yielding mechanism.
（考案が解決しようとする問題点）
このため梁の耐力に対して柱の耐力を割増すだ
けの方法が提案されているが、地震時における柱
のモーメントの変動を考え、特に弱点となると考
えられる１階柱の耐力調整について、従来十分な
顧慮が払われていなかつた。(Problem that the invention attempts to solve) For this reason, a method has been proposed in which the strength of the column is simply increased compared to the strength of the beam, but considering the fluctuation of the moment of the column during an earthquake, it is considered to be a particularly weak point. In the past, sufficient consideration had not been given to adjusting the strength of the first floor columns.
（問題点を解決するための手段）
本考案はこのような問題点を解決するために提
案されたものであつて、鉄筋コンクリート構造物
における１階柱の全高に亘つて柱主筋を均一に配
筋するとともに、同柱筋の一部の下端面を１階梁
に埋設された縦筋の上端面に衝接してなることを
特徴とする鉄筋コンクリート耐震構造に係るもの
である。(Means for solving the problem) The present invention was proposed to solve the above problem, and it is a method for uniformly distributing column main reinforcement over the entire height of the first floor column in a reinforced concrete structure. In addition, the present invention relates to a reinforced concrete earthquake-resistant structure characterized in that the lower end surfaces of some of the column reinforcements collide with the upper end surfaces of vertical reinforcements embedded in the first floor beams.
（作用）
骨組の安定した崩壊形は梁降伏先行メカニズム
であり、柱については、１階の柱脚のみが降伏す
るのが理想的であるとされている。(Function) The stable collapse of the frame is based on the beam yielding-first mechanism, and for columns, it is considered ideal that only the first-floor column base yields.
従つて１階の柱脚部は必要とされる最低の量を
配筋し、１階柱頭を含むその他の柱の部位につい
ては降伏しないように耐力を上げる必要がある。 Therefore, it is necessary to provide the minimum amount of reinforcement for the column bases on the first floor, and to increase the strength of the other columns, including the first floor column heads, to prevent them from yielding.
これを実現するため本考案においては前記した
ように、１階柱の全高に亘つて柱主筋を均一に配
筋するとともに、同柱筋の一部の下端面を１階梁
に埋設された縦筋の上端面に衝接して、前記柱筋
の一部は引張力を伝達せず圧縮力のみを伝達する
ようにして、残余の柱主筋で曲げを処理するよう
にしたものである。 In order to achieve this, in this invention, as mentioned above, the main column reinforcements are arranged uniformly over the entire height of the first-floor columns, and the lower end surfaces of some of the column reinforcements are connected to the vertical reinforcements embedded in the first-floor beams. A part of the column reinforcement does not transmit tensile force but only compressive force by colliding with the upper end surface of the reinforcement, and the remaining column reinforcement handles the bending.
従つて１階柱の柱脚部の曲げ耐力に対して柱頭
部の曲げ耐力が相対的に増大する。 Therefore, the bending strength of the column head increases relative to the bending strength of the column base of the first floor column.
わかり易くするため、例えば１階柱脚部の曲げ
耐力を1.0、柱頭部の曲げ耐力を2.0とすると、柱
頭部は概ね1.0の曲げ耐力の余裕を計算上持つこ
とになるが、実際の地震は不規則であるので、柱
頭部の曲げモーメントは変動するが、同柱頭部は
前記したように1.0の曲げ耐力の余裕があるので、
設計に少々の見込み違いがあつても、降伏はしな
い。 To make it easier to understand, for example, if the bending capacity of the first floor column base is 1.0 and the bending capacity of the column head is 2.0, the column head will have a margin of bending capacity of approximately 1.0 in calculations, but in actual earthquakes, Since it is a rule, the bending moment of the column head will vary, but the column head has a margin of bending strength of 1.0 as mentioned above, so
Even if there is a slight misunderstanding in the design, we will not surrender.
しかしながら１階の柱頭部と柱脚部とが同一の
曲げ耐力を持つていると、１階の柱頭部におい
て、地震時における柱のモーメントの変動により
予期しなかつた降伏が生じたり、２階の柱脚に予
期しない降伏が生起する可能性が生じる。 However, if the first floor column head and column base have the same bending strength, the first floor column head may unexpectedly yield due to changes in column moment during an earthquake, and the second floor column head may unexpectedly yield due to changes in column moment during an earthquake. This creates the possibility of unexpected yielding of the column base.
本考案は前記１階柱の柱主筋の一部の下端面を
１階梁に定着することなく、同１階梁に埋設され
た縦筋の上端面に衝接せしめたことによつて、上
記の現象を回避するようにしたものである。 The present invention achieves the above by making the lower end surface of a part of the main column reinforcement of the first floor column collide with the upper end surface of the vertical reinforcement embedded in the first floor beam without fixing it to the first floor beam. This is to avoid this phenomenon.
（考案の効果）
このように本考案によれば鉄筋コンクリート構
造物における１階柱の柱主筋の一部の下端面を１
階梁に定着することなく、同１階梁に埋設された
縦筋の上端面に衝接せしめたことによつて、(i)柱
の曲げ性能を増大することなく圧縮性能を増大す
るとともに、(ii)１階柱脚部と柱頭部の曲げ性能を
変えることによつて、靭性を必要とする部分と耐
力のみを必要とする部分を調整できるようにした
ものである。(Effect of the invention) As described above, according to the invention, the lower end surface of a part of the main column reinforcement of the first floor column in a reinforced concrete structure is
By colliding with the upper end surface of the vertical bars embedded in the first floor beam without being fixed to the floor beam, (i) the compression performance is increased without increasing the bending performance of the column; (ii) By changing the bending performance of the first floor column base and column head, it is possible to adjust the parts that require toughness and the parts that only require proof stress.
(ii)の点について更に詳述すると、１階柱脚は靭
性を必要とする部分（エネルギを吸収する部分）
であり、１階柱頭部は降伏が生じないように大き
な耐力を必要とする部分である。１階柱頭部が降
伏しないことはエネルギ吸収効果の高い２階梁が
降伏することを意味する。 To explain point (ii) in more detail, the first floor column base is a part that requires toughness (a part that absorbs energy).
Therefore, the first floor column head is a part that requires a large strength to prevent yielding. If the first floor column head does not yield, it means that the second floor beam, which has a high energy absorption effect, will yield.
従つて本考案は、前記のように１階柱の主筋の
一部の下端を１階梁の縦筋の上端面に衝接するこ
とによつて、１階柱脚部が靭性を確保できる最小
の鉄筋を配置し、柱頭部はこれによつて柱脚部に
比して相対的に割増しされた鉄筋の効果によつて
耐力が柱脚部にくらべて大きくなるものである。 Therefore, in the present invention, the lower end of a part of the main reinforcement of the first floor column collides with the upper end surface of the vertical reinforcement of the first floor beam as described above, so that the base of the first floor column has the minimum strength that can ensure toughness. By arranging reinforcing bars, the strength of the column head is increased compared to that of the column base due to the effect of the reinforcing bars being relatively increased compared to the column base.
これは靭性の必要な部分と、耐力のみを必要と
する部分の明確な配筋上の区別がなされたことを
意味するものである。 This means that a clear distinction has been made between areas that require toughness and areas that only require yield strength.
（実施例） 以下本考案を図面の実施例について説明する。(Example) The present invention will be described below with reference to embodiments shown in the drawings.
第１図及び第２図においてＡは鉄筋コンクリー
ト構造物の１階柱、Ｂは１階梁で、１階柱Ａの柱
主筋１の１部１ａを前記１階梁Ｂに定着させるこ
となく、下端面を同１階梁Ｂに埋設された縦筋２
の上端に衝接する。 In Figures 1 and 2, A is a first-floor column of a reinforced concrete structure, B is a first-floor beam, and one part 1a of the main column reinforcement 1 of the first-floor column A is lowered without being anchored to the first-floor beam B. Vertical reinforcement 2 whose end face is buried in the first floor beam B
collides with the top edge of
なお第３図に示すように、前記柱主筋１ａと縦
筋２との衝接面Ｃを梁Ｂの頂面より下方にｌだけ
下げて、剪断力に抵抗できるようにしてもよい。 As shown in FIG. 3, the contact surface C between the column main reinforcement 1a and the longitudinal reinforcement 2 may be lowered by l below the top surface of the beam B to resist shearing force.
図示の実施例においては前記したように、１階
柱Ａの柱脚部において一部の柱主筋１ａを梁Ｂに
定着することのないようにし、柱の曲げ性能を上
げずに圧縮性能を向上するとともに、１階柱脚部
Ｅと柱頭部Ｄとの曲げ性能を変えることによつ
て、既述のように靭性の必要な部分と耐力のみを
必要とする部分をの明確な配筋上の区別をなしう
るものであり、更に１階柱Ａの柱脚部Ｅの曲げ耐
力に対して柱頭部Ｄの曲げ耐力を相対的に増大す
ることによつて、地震時における柱のモーメント
の変動に対する安全性を向上しうるものである。 In the illustrated embodiment, as described above, some of the main column reinforcements 1a at the base of the first floor column A are prevented from being fixed to the beam B, and the compression performance is improved without increasing the bending performance of the column. At the same time, by changing the bending performance of the first floor column base E and column head D, it is possible to clearly distinguish between areas that require toughness and areas that require only proof stress, as described above. Furthermore, by increasing the bending capacity of the column head D relative to the bending capacity of the column base E of the first floor column A, it is possible to prevent the column from changing its moment during an earthquake. This can improve safety.
なお本考案を耐震壁の附帯柱に適用すると、靭
性のある曲げ壁を設計できる。 Furthermore, by applying the present invention to accessory columns of shear walls, it is possible to design bending walls with toughness.
第１図は本考案に係る鉄筋コンクリート耐震構
造の一実施例を示す縦断面図、第２図は第１図の
矢視−図、第３図は本考案の他の実施例を示
す縦断面図である。
Ａ……１階柱、Ｂ……１階梁、Ｃ……柱主筋と
１階梁の縦筋との衝接面、Ｄ……１階柱頭部、Ｅ
……１階柱脚部、１……柱主筋、１ａ……柱主
筋、２……１階梁の縦筋。
Fig. 1 is a longitudinal cross-sectional view showing one embodiment of the reinforced concrete earthquake-resistant structure according to the present invention, Fig. 2 is a view taken along the arrow in Fig. 1, and Fig. 3 is a longitudinal cross-sectional view showing another embodiment of the present invention. It is. A...1st floor column, B...1st floor beam, C...Contact surface between column main reinforcement and vertical reinforcement of 1st floor beam, D...1st floor column head, E
...1st floor column base, 1...column main reinforcement, 1a...column main reinforcement, 2...1st floor beam vertical reinforcement.
Claims (1)
に亘つて柱主筋を均一に配筋するとともに、同柱
筋の一部の下端面を１階梁に埋設された縦筋の上
端面に衝接してなることを特徴とする鉄筋コンク
リート耐震構造。 In a reinforced concrete structure, the main column reinforcement is arranged uniformly over the entire height of the first floor column, and the lower end surface of a part of the column reinforcement is in contact with the upper end surface of the vertical reinforcement embedded in the first floor beam. A reinforced concrete earthquake-resistant structure featuring
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8894785U JPH033719Y2 (en) | 1985-06-14 | 1985-06-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8894785U JPH033719Y2 (en) | 1985-06-14 | 1985-06-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61206053U JPS61206053U (en) | 1986-12-26 |
| JPH033719Y2 true JPH033719Y2 (en) | 1991-01-30 |
Family
ID=30642575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8894785U Expired JPH033719Y2 (en) | 1985-06-14 | 1985-06-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH033719Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006070639A1 (en) * | 2004-12-28 | 2006-07-06 | Meiji University Legal Person | Hinge inducing structure of concrete member |
-
1985
- 1985-06-14 JP JP8894785U patent/JPH033719Y2/ja not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006070639A1 (en) * | 2004-12-28 | 2006-07-06 | Meiji University Legal Person | Hinge inducing structure of concrete member |
| JPWO2006070639A1 (en) * | 2004-12-28 | 2008-08-07 | 学校法人明治大学 | Hinge-induced structure of concrete members |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61206053U (en) | 1986-12-26 |
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