CN108360750A - A kind of novel frame structure beam-ends reinforcement detailing and its design method - Google Patents
A kind of novel frame structure beam-ends reinforcement detailing and its design method Download PDFInfo
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- CN108360750A CN108360750A CN201810200342.6A CN201810200342A CN108360750A CN 108360750 A CN108360750 A CN 108360750A CN 201810200342 A CN201810200342 A CN 201810200342A CN 108360750 A CN108360750 A CN 108360750A
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- Prior art keywords
- length
- muscle
- vertical muscle
- reinforcement
- indulges
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
- E04C5/0609—Closed cages composed of two or more coacting cage parts, e.g. transversally hinged or nested parts
Abstract
The invention discloses a kind of novel frame structure beam-ends reinforcement detailings, it is grown including back and indulges muscle, beam bottom length indulges muscle, short vertical muscle and several groups lateral tie, the adjacent back length indulges muscle and the upper bending of an opening upwards is arranged in the plastic hinge region of equal length, the adjacent beam bottom length indulges muscle and a lower bending that Open Side Down is arranged in the plastic hinge region of equal length, the upper end of the upper bending and the lower end of lower bending are respectively connected with short vertical muscle, the present invention adds short vertical muscle in vertical muscle knee, structure is set to keep elastic stage under small shake effect, realize the target of no damage in small earthquake, and the meter specific method that the arrangement of reinforcement for giving vertical muscle position sum is set.In addition simple structure of the present invention is combined closely with existing specification, and design and construction personnel is facilitated to be promoted and applied in Practical Project.
Description
Technical field
The invention belongs to Vierendeel girder reinforcement structure technical fields, and in particular to a kind of novel frame structure beam-ends arrangement of reinforcement structure
It makes, the invention further relates to a kind of design methods of novel frame structure beam-ends reinforcement detailing.
Background technology
Reinforced concrete structure frame structure is generally made of beam, plate, column.Due to its structure flexible arrangement, have compared with
The big interior space, use is more convenient, worldwide becomes a kind of the most widely used architecture structure form.Earthquake
The damage of middle building structure, which is collapsed, can cause serious casualties and economic loss.The all previous seimic disaster census of recent domestic
Reinforced concrete frame structure degree of impairment is serious, hopes " strong column and weak beam " that occurs different from design time, steel reinforced concrete frame
Frame structure tends to occur the failure mode of " the weak column of brutal " in earthquake.Because the failure mode of " the weak column of brutal " is a kind of brittleness
It destroys, the ductility and energy dissipation capacity of structure can be substantially reduced, so when structure meets with the geological process less than Seismic Fortification,
Structure may be because the failure mode of generation " the weak column of brutal " form and collapse.
In terms of realizing reinforced concrete frame structure " the weak column of brutal " failure mode, many has been carried out in recent years
Research, it is proposed that corresponding technology and construction measure, but these existing method parts are since construction complexity is to constructor
Member's technology requires height, it is difficult to be promoted and applied in Practical Project；Another part is mainly realized in guarantee structure under big shake effect
While the failure mode of " the weak column of brutal ", it is difficult to ensure that structure " no damage in small earthquake ".Therefore, it is succinct convenient wide to design a kind of construction
Large-engineering personnel's design and construction, while the beam reinforcement detailing measure of " no damage in small earthquake " can be met, for mitigating under geological process
Casualties caused by reinforced concrete structure failure damage and economic loss have important practical significance.
Invention content
The purpose of the present invention is to provide a kind of novel frame structure beam-ends reinforcement detailing and its design methods, in solution
State the problem of being proposed in background technology.
To achieve the above object, the present invention provides the following technical solutions：A kind of novel frame structure beam-ends reinforcement detailing, packet
It includes back length and indulges muscle, the vertical muscle of beam bottom length, short vertical muscle and several groups lateral tie, it is parallel and equidistant that the adjacent back length, which indulges muscle,
Setting, the adjacent beam bottom length indulge muscle and are parallel and are placed equidistant with, and the adjacent back grows the plastic hinge for indulging muscle in equal length
The upper bending of an opening upwards is arranged in area, and the adjacent beam bottom length indulges muscle and an opening is arranged in the plastic hinge region of equal length
The lower end of downward lower bending, the upper end of the upper bending and lower bending is respectively connected with short vertical muscle, and the back length indulges muscle and beam
Bottom length indulges muscle and is located at the top and bottom in lateral tie.
Preferably, the upper bending is consistent with the lower shape of bending.
Preferably, the distance between adjacent described lateral tie is equal.
The present invention also provides a kind of design methods of novel frame structure beam-ends reinforcement detailing, specifically include following step
Suddenly：
S1, beam-ends plastic hinge length can encrypt range since column side, level-one is anti-according to hoop reinforcement length value
The frame beam stirrup encryption length for shaking grade is 2 times of deck-molding, two, three, the frame beam stirrup of level Four seismic behavior encrypt length
It for 1.5 times of deck-molding, and is intended to meet and is more than 500mm, if being unsatisfactory for being more than 500mm, be encrypted by 500mm length.Beam
Suggest taking away from 1/3 Plastic hinge length L of styletable in the long vertical muscle knee in topModeling.Beam bottom length indulges muscle knee and suggests taking away from 2/3 plasticity of styletable
Cut with scissors length LModeling；
S2, short vertical muscle anchorage length La, according to formula valueLaFor tension reinforcement anchorage length；ζaFor
Anchorage length correction factor, LabFor the basic anchorage length of tension reinforcement.The anchorage length correction factor of longitudinal tensile regular reinforcement
ζaWith basic anchorage length and LaSpecific value can refer to Code for design of concrete structures (GB 50010-2010)；
S3, the short vertical muscle of styletable plastic hinge region back and beam bottom area SIt is shortSeismic force under being acted on according to small shake is counted
It calculates,WhereinThe pulling force that lower beam-ends or beam bottom reinforcing bar are born is acted on for small shake, F " is long vertical muscle knee
Stretch required pulling force, fy' it is short vertical muscle tensile yield strength design value；
S4, the long vertical muscle area of reinforcement, calculate big shake according to Code for design of concrete structures (GB 50010-2010) and act on
The pulling force that lower back or beam bottom reinforcing bar are born Wherein SIt is longFor the area of long vertical muscle, fy" it is long vertical
Muscle tensile yield strength design value.
A kind of novel frame structure beam-ends reinforcement detailing provided by the invention and its design method, by beam-ends plastic hinge
Area's setting bending indulges muscle and weakens in beam-ends section to realize the inefficacy mechanism of strong column and weak beam, and the structure of muscle bending is indulged with other beam-ends
The measure of making is compared, and the present invention adds short vertical muscle in vertical muscle knee, so that structure is kept elastic stage under small shake effect, is realized small
The meter specific method that the arrangement of reinforcement for shaking not bad target, and giving vertical muscle position sum is set.In addition simple structure of the present invention, with
Existing specification is combined closely, and design and construction personnel is facilitated to be promoted and applied in Practical Project.
Description of the drawings
Fig. 1 is that the back length of the present invention indulges muscle and beam bottom length indulges muscle structural schematic diagram；
Fig. 2 is the positional structure schematic diagram of the short vertical muscle of the present invention；
Fig. 3 is overall structure of the present invention；
Fig. 4 is that that straightening force in the long vertical muscle knee of the present invention is F " structural schematic diagrams；
Fig. 5 is that unitary side of the present invention cuts open structural schematic diagram.
In figure：1 back length indulges that muscle, bending, 3 lateral ties, 4 beam bottoms length are indulged muscle, are bent for 5 times, 6 short vertical muscle on 2.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of novel frame structure beam-ends reinforcement detailings of such as Fig. 1-5, including back length to indulge muscle 1, beam
Bottom length indulges muscle 4, short vertical muscle 6 and several groups lateral tie 3, and the adjacent back length indulges muscle 1 and is parallel and is placed equidistant with, adjacent institute
It states the vertical muscle 4 of beam bottom length to be parallel and be placed equidistant with, the adjacent back length indulges muscle 1 and is arranged one in the plastic hinge region of equal length
The upper bending 2 of opening upwards, adjacent beam bottom length indulge muscle 4 in the case where the plastic hinge region of equal length is arranged one Open Side Down
Bending 5, the upper end of the upper bending 2 and the lower end of lower bending 5 are respectively connected with short vertical muscle 6, and the back length indulges muscle 1 and beam bottom is long
Vertical muscle 4 is located at the top and bottom in lateral tie 3.
The upper bending 2 is consistent with the shape of lower bending 5.
The distance between the adjacent lateral tie 3 is equal.
The present invention also provides a kind of design methods of novel frame structure beam-ends reinforcement detailing, specifically include following step
Suddenly：
S1, beam-ends plastic hinge length can encrypt range since column side, level-one is anti-according to hoop reinforcement length value
The frame beam stirrup encryption length for shaking grade is 2 times of deck-molding, two, three, the frame beam stirrup of level Four seismic behavior encrypt length
It for 1.5 times of deck-molding, and is intended to meet and is more than 500mm, if being unsatisfactory for being more than 500mm, be encrypted by 500mm length.Beam
Suggest taking away from 1/3 Plastic hinge length L of styletable in the long vertical muscle knee in topModeling.Beam bottom length indulges muscle knee and suggests taking away from 2/3 plasticity of styletable
Cut with scissors length LModeling；
S2, short vertical muscle anchorage length La, according to formula valueLaFor tension reinforcement anchorage length；ζaFor
Anchorage length correction factor, LabFor the basic anchorage length of tension reinforcement.The anchorage length correction factor of longitudinal tensile regular reinforcement
ζaWith basic anchorage length and LaSpecific value can refer to Code for design of concrete structures (GB 50010-2010)；
S3, the short vertical muscle of styletable plastic hinge region back and beam bottom area SIt is shortSeismic force under being acted on according to small shake is counted
It calculates,WhereinThe pulling force that lower beam-ends or beam bottom reinforcing bar are born is acted on for small shake, F " is that long vertical muscle knee is drawn
Straight required pulling force, fy' it is short vertical muscle tensile yield strength design value；
S4, the long vertical muscle area of reinforcement, calculate big shake according to Code for design of concrete structures (GB 50010-2010) and act on
The pulling force that lower back or beam bottom reinforcing bar are born Wherein SIt is longFor the area of long vertical muscle, fy" it is long vertical
Muscle tensile yield strength design value.
Back length indulges muscle 1, beam bottom length indulges muscle 4 and a curved configuration form, long vertical muscle transfer angle is arranged in plastic hinge region
It is recommended that 30,25,60 degree are taken, bending section length L1It is recommended that 4-8 double-lengths is taken to indulge muscle diameter, while short vertical muscle 6 is arranged at this, work as knot
When structure is acted on by small shake, only short 6 stress of vertical muscle, when geological process is more than small shake (middle shake, big shake), beam-ends length indulges muscle quilt
Concrete cracking is to realize the weakening in section at this while stretching, and then forms the failure mechanism of strong column and weak beam, middle shake, big shake
Under short vertical muscle 6 and back length indulge muscle 1 and beam bottom length indulges the stress simultaneously of muscle 4, prevent structure from collapsing under big shake effect.
In conclusion compared with prior art, a kind of novel frame structure beam-ends reinforcement detailing provided by the invention and its
Design method is weakened in beam-ends section to realize the failure machine of strong column and weak beam by indulging muscle in the setting bending of beam-ends plastic hinge region
System, compared with other beam-ends indulge the construction measure of muscle bending, the present invention adds short vertical muscle in vertical muscle knee, makes structure small
Shake effect is lower to keep elastic stage, the meter tool that the arrangement of reinforcement realized the target of no damage in small earthquake, and give vertical muscle position sum is set
Body method.In addition simple structure of the present invention is combined closely with existing specification, and design and construction personnel is facilitated to be pushed away in Practical Project
Wide application.
Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (4)
1. a kind of Vierendeel girder reinforcement structure of achievable strong column and weak beam failure mode, including back length indulges muscle (1), beam bottom length indulges muscle
(4), short vertical muscle (6) and several groups lateral tie (3), it is characterised in that：It is parallel and equidistant that the adjacent back length, which indulges muscle (1),
Setting, the adjacent beam bottom length indulge muscle (4) and are parallel and are placed equidistant with, and the adjacent back length indulges muscle (1) in equal length
The upper bending (2) of an opening upwards is arranged in plastic hinge region, and the adjacent beam bottom length indulges muscle (4) in the plastic hinge region of equal length
One lower bending (5) that Open Side Down is set, and the upper end of the upper bending (2) and the lower end of lower bending (5) are respectively connected with short vertical
Muscle (6), the back length indulges muscle (1) and beam bottom length indulges muscle (4) and is located at the top and bottom in lateral tie (3).
2. a kind of Vierendeel girder reinforcement structure of achievable strong column and weak beam failure mode according to claim 1, feature exist
In：The upper bending (2) is consistent with the lower bending shape of (5).
3. a kind of Vierendeel girder reinforcement structure of achievable strong column and weak beam failure mode according to claim 1, feature exist
In：The distance between the adjacent lateral tie (3) is equal.
4. a kind of design method of novel frame structure beam-ends reinforcement detailing described in claim 1, it is characterised in that：Specific packet
Include following steps：
S1, beam-ends plastic hinge length can encrypt range since column side, seismic grade Ⅰ etc. according to hoop reinforcement length value
The frame beam stirrup encryption length of grade is 2 times of deck-molding, two, three, the frame beam stirrup encryption length of level Four seismic behavior be 1.5
Deck-molding again, and be intended to meet and be more than 500mm, if being unsatisfactory for being more than 500mm, it is encrypted by 500mm length；Back length is vertical
Suggest taking away from 1/3 Plastic hinge length L of styletable in muscle kneeModeling, the vertical muscle knee of beam bottom length suggests taking away from 2/3 Plastic hinge length of styletable
LModeling；
S2, short vertical muscle anchorage length La, according to formula valueLaFor tension reinforcement anchorage length；ζaIt is grown for anchoring
Spend correction factor, LabFor the basic anchorage length of tension reinforcement；The anchorage length correction factor ζ of longitudinal tensile regular reinforcementaAnd base
This anchorage length and LaSpecific value can refer to Code for design of concrete structures (GB 50010-2010), long vertical muscle and short vertical
Muscle can be bound or be welded and fixed together by thin wire, prevent from relatively moving in work progress；
S3, the short vertical muscle of styletable plastic hinge region back and beam bottom area SIt is shortSeismic force under being acted on according to small shake is calculated,WhereinThe pulling force that lower beam-ends or beam bottom reinforcing bar are born is acted on for small shake, F " is that long vertical muscle knee stretches
Required pulling force, fy' it is short vertical muscle tensile yield strength design value；
S4, the long vertical muscle area of reinforcement, calculate big shake according to Code for design of concrete structures (GB 50010-2010) and act on underbeam
The pulling force that top or beam bottom reinforcing bar are born Wherein SIt is longFor the area of long vertical muscle, fy" be long vertical muscle by
Draw yield strength design value.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010928481.8A CN111910834B (en) | 2018-03-12 | 2018-03-12 | Design method of long longitudinal rib bent frame structure beam end reinforcement structure |
| CN201810200342.6A CN108360750B (en) | 2018-03-12 | 2018-03-12 | Novel frame structure beam end reinforcement structure and design method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810200342.6A CN108360750B (en) | 2018-03-12 | 2018-03-12 | Novel frame structure beam end reinforcement structure and design method thereof |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010928481.8A Division CN111910834B (en) | 2018-03-12 | 2018-03-12 | Design method of long longitudinal rib bent frame structure beam end reinforcement structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108360750A true CN108360750A (en) | 2018-08-03 |
| CN108360750B CN108360750B (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810200342.6A Expired - Fee Related CN108360750B (en) | 2018-03-12 | 2018-03-12 | Novel frame structure beam end reinforcement structure and design method thereof |
| CN202010928481.8A Active CN111910834B (en) | 2018-03-12 | 2018-03-12 | Design method of long longitudinal rib bent frame structure beam end reinforcement structure |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202010928481.8A Active CN111910834B (en) | 2018-03-12 | 2018-03-12 | Design method of long longitudinal rib bent frame structure beam end reinforcement structure |
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| CN (2) | CN108360750B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763602A (en) * | 2019-03-11 | 2019-05-17 | 江南大学 | A kind of classification wave inception arrangement of reinforcement RC beam |
| CN113863550A (en) * | 2021-10-21 | 2021-12-31 | 中国地震局工程力学研究所 | Anti-seismic structure capable of avoiding influence of cast-in-place floor on damage mechanism of strong column and weak beam |
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| JPH08120770A (en) * | 1994-08-31 | 1996-05-14 | Maeda Corp | Bar arranging structure of reinforced concrete member |
| JPH09105171A (en) * | 1995-10-09 | 1997-04-22 | Ando Corp | Reinforcing structure of composite construction beam |
| CN103074941A (en) * | 2012-12-24 | 2013-05-01 | 北京工业大学 | Assembly type recycled concrete node with steel bar truss girders at end parts and manufacturing method thereof |
| CN104594558A (en) * | 2015-01-28 | 2015-05-06 | 清华大学 | Reinforced concrete frame beam structure |
| CN206616706U (en) * | 2017-03-20 | 2017-11-07 | 西京学院 | A kind of column with variable cross-sections girder connection plastic hinge |
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| JP4893233B2 (en) * | 2006-10-27 | 2012-03-07 | 株式会社大林組 | Reinforced structure of reinforced concrete beam with opening, manufacturing method of reinforced concrete beam with opening, beam structure |
| CN202117223U (en) * | 2011-06-09 | 2012-01-18 | 北京工业大学 | Beam end structure of galvanized welded steel wire gauze |
| CN103835367B (en) * | 2014-02-25 | 2016-08-17 | 中国电力科学研究院 | The constitution optimization method of high-damping steel reinforced concrete frame |
| CN105714968B (en) * | 2016-02-24 | 2019-02-19 | 郭猛 | Mitigate the concrete floor optimum design method of the weak column earthquake of brutal |
| CN105839944B (en) * | 2016-05-23 | 2018-01-16 | 清华大学 | Anti-seismic strengthening device for reinforced concrete frame structure |
| CN106545086B (en) * | 2016-10-17 | 2019-03-05 | 华南理工大学 | A kind of steel bar regeneration monolith beam-column joint and its construction method |
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2018
- 2018-03-12 CN CN201810200342.6A patent/CN108360750B/en not_active Expired - Fee Related
- 2018-03-12 CN CN202010928481.8A patent/CN111910834B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08120770A (en) * | 1994-08-31 | 1996-05-14 | Maeda Corp | Bar arranging structure of reinforced concrete member |
| JPH09105171A (en) * | 1995-10-09 | 1997-04-22 | Ando Corp | Reinforcing structure of composite construction beam |
| CN103074941A (en) * | 2012-12-24 | 2013-05-01 | 北京工业大学 | Assembly type recycled concrete node with steel bar truss girders at end parts and manufacturing method thereof |
| CN104594558A (en) * | 2015-01-28 | 2015-05-06 | 清华大学 | Reinforced concrete frame beam structure |
| CN206616706U (en) * | 2017-03-20 | 2017-11-07 | 西京学院 | A kind of column with variable cross-sections girder connection plastic hinge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763602A (en) * | 2019-03-11 | 2019-05-17 | 江南大学 | A kind of classification wave inception arrangement of reinforcement RC beam |
| CN113863550A (en) * | 2021-10-21 | 2021-12-31 | 中国地震局工程力学研究所 | Anti-seismic structure capable of avoiding influence of cast-in-place floor on damage mechanism of strong column and weak beam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111910834A (en) | 2020-11-10 |
| CN108360750B (en) | 2020-09-29 |
| CN111910834B (en) | 2021-09-24 |
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