JPS5912828B2 - Column/beam joint of reinforced concrete structural frame - Google Patents
Column/beam joint of reinforced concrete structural frameInfo
- Publication number
- JPS5912828B2 JPS5912828B2 JP8579176A JP8579176A JPS5912828B2 JP S5912828 B2 JPS5912828 B2 JP S5912828B2 JP 8579176 A JP8579176 A JP 8579176A JP 8579176 A JP8579176 A JP 8579176A JP S5912828 B2 JPS5912828 B2 JP S5912828B2
- Authority
- JP
- Japan
- Prior art keywords
- column
- beam joint
- reinforced concrete
- main reinforcing
- section
- 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
- 239000011150 reinforced concrete Substances 0.000 title claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 28
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Rod-Shaped Construction Members (AREA)
Description
【発明の詳細な説明】
本発明は、鉄筋コンクリート構造骨組の柱、梁接合部に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a column-beam joint of a reinforced concrete structural frame.
鉄筋コンクリート構造骨組の構造上重要な柱。A structurally important column in a reinforced concrete structural frame.
梁接合部において、従来の通常の通し配筋とした梁又は
柱の主鉄筋は、地震時の大きい繰返し荷重を受けると、
柱、梁接合部における鉄筋とコンクリート間の付着性能
の劣化をきたし、上記接合部からの主鉄筋の抜は出しが
顕著となり、難物全体の骨組の復元力特性を損うと共に
、その時の骨組の復元力特性は、極端な剛性低下及びエ
ネルギー吸収能の減少といった欠陥を表わし、偉物の耐
震上好ましくない状態を呈することが多い。At beam joints, when the main reinforcing bars of beams or columns with conventional through-reinforcement are subjected to large cyclic loads during earthquakes,
This causes deterioration of the adhesion performance between the reinforcing bars and concrete at the joints between columns and beams, and the main reinforcing bars are pulled out from the joints, which impairs the restoring force characteristics of the entire framework of the difficult object, and the strength of the framework at that time. The restoring force characteristics exhibit defects such as an extreme decrease in rigidity and a decrease in energy absorption capacity, and often present conditions that are unfavorable from the earthquake resistance of great objects.
しかしてこの場合、特に梁の主鉄筋の降伏域の柱、梁接
合部内への進展が、該接合部における主鉄筋の付着性能
の劣化を促進する原因となっている。However, in this case, in particular, the progression of the yield zone of the main reinforcing bars of the beam into the column-to-beam joint is a cause of promoting deterioration of the adhesion performance of the main reinforcing bars at the joint.
本発明は、鉄筋コンクリート構造骨組の柱、梁接合部に
おいて、梁の通し主鉄筋を、柱、梁接合部内に当る区間
において、焼入れによって降伏強度を高める処置をとり
、通し主鉄筋の柱、梁接合一部内への進展を防ぐことに
よってその付着性能の劣化を遅延させ、鉄筋コンクリー
ト構造骨組の柱・梁接合部における梁の通し主鉄筋の抜
は出しを経済的にかつ有効に防止し、鉄筋コンクリート
構造の難物全体の骨組の復元力特性の改善と耐震性能の
向上に役立つ新しい柱・梁接合部の構成を提供。The present invention takes steps to increase the yield strength of the main through-beam reinforcing bars at the column-to-beam joints of reinforced concrete structural frames by quenching them in the section corresponding to the column-to-beam joints. It delays the deterioration of the adhesion performance by preventing the propagation into a part of the frame, and economically and effectively prevents the main reinforcing bars of beams from being pulled out at column-beam joints in reinforced concrete structural frames. We provide a new column-beam joint configuration that helps improve the restoring force characteristics of the entire frame of difficult objects and improves seismic performance.
するものである。It is something to do.
以下、本発明を第１図の実施例図に基き説明すると、本
発明は、鉄筋コンクリート構造骨組における柱１と梁２
の接合部すなわち柱・梁接合部３を通る梁２の通し主鉄
筋４の柱・梁接合部３内に当る区間５、すなわち柱・梁
接合部３の柱１に相当する部に在る区間５を、予め焼入
れを施すことによって柱・梁接合部３の外になる区間よ
り降伏強度を相当高めた高強度区間に構成したことを特
徴とするものである。Hereinafter, the present invention will be explained based on the embodiment diagram of FIG. 1.
In other words, the section 5 that corresponds to the column-beam joint 3 of the main reinforcing bar 4 of the beam 2 passing through the column-beam joint 3, that is, the section located in the part corresponding to the column 1 of the column-beam joint 3. 5 is characterized by being constructed into a high-strength section whose yield strength is considerably higher than that of the section outside the column-beam joint 3 by being hardened in advance.
なお図面において、６は柱１の主鉄筋、７は梁２のスタ
ーラップ、８は柱１のフープ筋である。In the drawing, 6 is the main reinforcement of the column 1, 7 is the stirrup of the beam 2, and 8 is the hoop reinforcement of the column 1.
また柱１に対して通し梁２が十字形に交叉する場合は、
双方の通し主鉄筋４に対して柱・梁接合部３内に当る区
間５に、予め前記同様にして焼入れによって降伏強度が
高められるものである。Also, if the through beam 2 crosses the column 1 in a cross shape,
The yield strength of both of the through main reinforcing bars 4 is increased by quenching the sections 5 within the column-beam joint 3 in the same manner as described above.
本発明は、上記の構成のもので、鉄筋コンクリート構造
骨組の柱・梁接合部３の梁２の通し主鉄筋４は、地震時
の大きい繰返し外力を受けた時、主鉄筋４の梁端附近が
降伏しても、柱・梁接合部３内に当る区間５の降伏強度
が相当高められた高強度区間になっているので、該鉄筋
の降伏域が接合部３内に進展することをおさえることが
出来、従って又、この区間５の応力に対する変形がすく
ないから、通し主鉄筋４の柱・梁接合部３内におけるコ
ンクリート間の付着性能の劣化が防止され、梁２の通し
主鉄筋４の柱 梁接合部３からの抜は出しが小さくなる
ようにすることが出来る。The present invention has the above configuration, and when the main reinforcing bars 4 of the beams 2 of the column-beam joints 3 of the reinforced concrete structure are subjected to large repeated external forces during an earthquake, the vicinity of the beam ends of the main reinforcing bars 4 Even if the reinforcing bars yield, the yield strength of the section 5 inside the column-beam joint 3 is a high-strength section with considerably increased yield strength, so the yield zone of the reinforcing bars can be prevented from extending into the joint 3. Therefore, since the deformation due to stress in this section 5 is small, deterioration of adhesion performance between concrete within the column-beam joint 3 of the main through reinforcement bars 4 is prevented, and the column of the main through reinforcement bars 4 of the beam 2 is prevented from deteriorating. The amount of extraction from the beam joint 3 can be reduced.
従って、鉄筋コンクリート構造骨組全体の復元力特性の
改善と耐震性能の向上が可能になるものである。Therefore, it is possible to improve the restoring force characteristics and seismic performance of the entire reinforced concrete structural frame.
つぎに、本発明の発明者が行った本発明についての実験
結果を、第２図乃至第５図によって説明する。Next, the results of experiments regarding the present invention conducted by the inventor of the present invention will be explained with reference to FIGS. 2 to 5.
第２図は、柱・梁接合部が繰返し外力（曲げ荷重）を受
ける実験において、従来の通常の梁の通し主鉄筋の場合
の柱・梁接合部からの主鉄筋抜は出し量を示すグラフ図
、第３図は、前図に対応する本発明の実施の場合のグラ
フ図で、本発明によって梁の通し主鉄筋の抜は出し量が
極めてすくなくなることが示されている。Figure 2 is a graph showing the amount of main reinforcing bar removed from the column/beam joint in the case of a conventional regular beam main reinforcing bar in an experiment in which the column/beam joint was subjected to repeated external forces (bending loads). FIG. 3 is a graph diagram corresponding to the previous figure in the case of implementing the present invention, and shows that the amount of withdrawal of the main reinforcing bars of the beam can be extremely reduced by the present invention.
つぎに第４図は、従来の梁の通し主鉄筋の場合の糧元力
特性を示すグラフ図、第５図は本発明を実施した場合の
復元力特性を示すグラフ図であって、両者を対比すれば
、明らかに本発明の実施の場合、低荷重時における第４
図に示される極端な剛性低下が改善されると共にエネル
ギー吸収能も相当増加している。Next, FIG. 4 is a graph showing the source force characteristics in the case of the conventional main reinforcement of a beam, and FIG. 5 is a graph showing the restoring force characteristics in the case of implementing the present invention. By contrast, clearly in the case of implementing the present invention, the fourth
The extreme stiffness reduction shown in the figure is improved, and the energy absorption capacity is also considerably increased.
上記の実験結果からも、本発明は鉄筋コンクリート構造
骨組の耐震性能の改善に役立つことが明らかである。From the above experimental results, it is clear that the present invention is useful for improving the seismic performance of reinforced concrete structural frames.
つぎに、上記した本発明の実施例は、柱・梁接合部にお
ける梁の通し主鉄筋の柱・梁接合部内に当る区間に、降
伏強度を高める焼入れ処置が施された場合であるが、必
要によっては、これに準じて柱の通し主鉄筋の柱・梁接
合部内に当る区間に、降伏強度を高める焼入れ処置を施
すことも可能である。Next, in the above-mentioned embodiment of the present invention, hardening treatment is applied to increase the yield strength in the section of the main reinforcing bar of the beam at the column-beam joint, which increases the yield strength. Depending on the case, it is also possible to perform hardening treatment to increase the yield strength in the section of the main through-beam reinforcement of the column that corresponds to the column-beam joint.
また主鉄筋の柱 梁接合部内に当る区間を他の区間より
降伏強度を高める処置は、予め工場で高周波焼入れによ
って行なわれるが、高周波焼入れ以外の適当な手段で焼
入れすることも可能である。In addition, the yield strength of the section of the main reinforcing bar within the column-beam joint is increased more than other sections by induction hardening at the factory, but it is also possible to harden the section by an appropriate method other than induction hardening.
しかして、゛上記する主鉄筋の焼入れを施す区間は、主
鉄筋の一部分に限られるものであるから、高周波焼入れ
によるコスト増加は、配筋に要する主鉄筋のコスト全体
からすれば、許される範囲に止め得るもので、本発明の
実施が経済的に可能である。Therefore, the above-mentioned section of the main reinforcing bars that is hardened is limited to a portion of the main reinforcing bars, so the cost increase due to induction hardening is within an allowable range considering the overall cost of the main reinforcing bars required for reinforcement. This makes it economically possible to implement the present invention.
なお、主鉄筋の全長を、高周波焼入れして降伏強度を高
める手段は、コストが極端に嵩−んで、経済的に実施不
可能である。Note that the method of increasing the yield strength by induction hardening the entire length of the main reinforcing bar is economically impractical due to extremely high costs.
添附の図面は、本発明の態様を実施例によって説明する
もので、第１図は、鉄筋コンクリート構造骨組の柱・梁
接合部における梁の主鉄筋に対する本発明の実施を示す
縦断面説明図、第２図乃至第５図は、本発明の実験につ
いてのグラフ図で、第２図は、従来の通常の梁の通し主
鉄筋による場合の抜は出し量のグラフ図、第３図は、前
図に対応する本発明の実施の場合のグラフ図、第４図は
、従来の通常の梁の通し主鉄筋の場合の復元力特性を示
すグラフ図、第５図は、前図に対応する本発明の実施の
場合のグラフ図である。
１・・・・・・柱、２・・・・・・梁、３・・・・・・
柱・梁接合部、４・・・・・・梁の通し主鉄筋、５・・
・・・・主鉄筋４の柱：梁接合部３内に当る区間、６・
・・・・・柱の主鉄筋、７・・・・・・梁のスターラッ
プ、８・・・・・・柱のフープ筋。The accompanying drawings are for explaining aspects of the present invention by way of examples, and FIG. Figures 2 to 5 are graphs of the experiments of the present invention, Figure 2 is a graph of the amount of pull-out in the case of a conventional normal beam using main reinforcing bars, and Figure 3 is the previous figure. FIG. 4 is a graph showing the restoring force characteristics in the case of a conventional regular beam through main reinforcing bar, and FIG. 5 is a graph showing the case of implementing the present invention corresponding to the previous figure. It is a graph diagram in the case of implementation. 1...Column, 2...Beam, 3...
Column/beam joint, 4... Main reinforcing bar of beam, 5...
...Column of main reinforcing bar 4: Section corresponding to inside beam joint 3, 6.
... Main reinforcing bars of columns, 7... Stirrups of beams, 8... Hoop bars of columns.
Claims (1)
を通る梁の通し主鉄筋の柱・梁接合部内に当る区間を、
予め焼入れを施すことによって柱。 梁接合部の外になる区間より降伏強度を相当高めた高強
度区間に構成したことを特徴とする鉄筋コンクＩＪ−ト
構造骨組の柱、梁接合部。[Scope of Claims] 1. In a reinforced concrete structural frame, the section of the main reinforcing bar that passes through the column-beam joint and falls within the column-beam joint is defined as
The pillars are made by pre-quenching. A column-to-beam joint of a reinforced concrete IJ-cont structure frame, characterized in that it is constructed as a high-strength section with a considerably higher yield strength than the section outside the beam joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8579176A JPS5912828B2 (en) | 1976-07-19 | 1976-07-19 | Column/beam joint of reinforced concrete structural frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8579176A JPS5912828B2 (en) | 1976-07-19 | 1976-07-19 | Column/beam joint of reinforced concrete structural frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5312138A JPS5312138A (en) | 1978-02-03 |
| JPS5912828B2 true JPS5912828B2 (en) | 1984-03-26 |
Family
ID=13868700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8579176A Expired JPS5912828B2 (en) | 1976-07-19 | 1976-07-19 | Column/beam joint of reinforced concrete structural frame |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5912828B2 (en) |
Cited By (1)
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|---|---|---|---|---|
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- 1976-07-19 JP JP8579176A patent/JPS5912828B2/en not_active Expired
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60118607A (en) * | 1983-11-29 | 1985-06-26 | Mitsui Miike Kakoki Kk | Method for reducing sulfur dioxide gas by recycling coke |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5312138A (en) | 1978-02-03 |
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