CN106522445A - Method and structure for preventing continuous collapse of slab-column structure - Google Patents
Method and structure for preventing continuous collapse of slab-column structure Download PDFInfo
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- CN106522445A CN106522445A CN201610953230.9A CN201610953230A CN106522445A CN 106522445 A CN106522445 A CN 106522445A CN 201610953230 A CN201610953230 A CN 201610953230A CN 106522445 A CN106522445 A CN 106522445A
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- Prior art keywords
- reinforcing bar
- plate
- column
- slab
- diagonal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/43—Floor structures of extraordinary design; Features relating to the elastic stability; Floor structures specially designed for resting on columns only, e.g. mushroom floors
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a method and a structure for preventing continuous collapse of a slab-column structure. The method includes: providing a standby load transmission path; locally damaging a surrounding structure having enough redundancy to support new path transmission load. The structure is characterized in that diagonal column-penetrating rebars are arranged at slightly-upward positions of neutral axis of a slab, and each two adjacent column-penetrating rebars in the slab are connected into a whole at a slab-column joint. The method and the structure have the advantages that by adopting technology of adding the diagonal column-penetrating rebars into columns in the slab-column structure, the objective of preventing transverse or longitudinal continuous collapse of the slab-column structure after a punching shear failure is achieved.
Description
Technical field
The present invention relates to the technology for penetrating destruction and continuous collapse of plate-column structure node is prevented, it is more particularly to a kind of diagonal
Prick post steel bar stress.
Background technology
Reinforced Concrete Slab Column structure typically refers to the structure being made up of floor and pillar, with common frame structure not
Together, it is that underfloor does not have beam the characteristics of plate-column structure, has the advantages that structural system is simple, Path of Force Transfer is succinct, therefore, space
Low with interfloor height, speed of application is fast, the advantages of be easy to separate room, it is adaptable to underground garage, multi-storied garage, multilamellar factory
Room, public building.In recent years, with the development of technology, occur in that Slab Column-shear Wall Structures, sheet-pile-core wall structure etc. are new
Mixing plate-column structure, is widely used in the building such as high-rise residential, garage.
As the design thickness of plate is limited, and floor does not have the support of beam, there was only the connection of plate and post, cause at Column border node
At slab-column connections, internal force is big, and stress is complicated, becomes the weak link of structure.On July 8th, 2010, Ontario, Canada
One double-deck garage, a small crane are strayed into parking lot, cause one of slab-column connections to penetrate destruction, and then cause remaining
Five nodes penetrate destruction, form continuous collapse.On November 17th, 2014, one underground garage of Jinan City, Shandong Province Changqing District is on ground
During the backfill of lower room, as backfill piles up excessive, the bearing capacity of garage top floor is exceeded, result in pillar and send out
Life penetrates destruction, eventually forms large area continuous collapse.
The content of the invention
In plate-column structure, all than larger, on plate, load will finally pass to pillar to the span of plate, therefore, at slab-column connections
Internal force is very big, and stress is complicated, is the weak link in plate-column structure.Before there is punching failure in node, pillar and floor
Between active force be mainly moment of flexure and shearing, node occur punching failure after, can there is of short duration transition stage, through destruction
The reinforcing bar of the conical surface can produce certain dowel action, and with the draw stage of reinforcing bar, the active force between pillar and floor is main
It is the pulling force of reinforcing bar, on stigma, node has " bearing capacity is participated in after punching failure " for floor meeting " suspension ".If reinforcing bar because
Lack of support and break or extract from reinforcing bar, when pillar thoroughly loses the supporting role to floor, pillar can pass through building
Plate and make floor slump downwards under gravity.After slab-column connections penetrate destruction, at adjacent node, internal force can be obvious
Increase, and then punching failure may occur and destruction is penetrated, so as to cause, plate-column structure is laterally consecutive to collapse.For multilamellar sheet-pile
, there is the laterally consecutive floor for collapsing and can slump on next layer of floor, cause the intermediate node of lower floor's floor and pillar in structure
Place's internal force increase, and then be longitudinally continuous and collapse.In order to prevent the laterally or longitudinally continuous of plate-column structure to destroy, the present invention is specially
Profit provides a kind of structure of anti-plate-column structure continuous collapse, it is therefore an objective to even if after pillar and plate penetrate destruction, matched somebody with somebody steel
Muscle can also sustain the plate being pierced, it is impossible to the laterally consecutive ductility collapsed, improve total occurs immediately, is taken precautions against natural calamities with reaching
Purpose.
Before diagonal prick post reinforcing bar is not set up, a pillar passes through the stress prick post reinforcing bar of top and bottom by plate
Four pillars around load transmission, it is assumed that therewith just to four share power for N1, the power that other diagonal pillars are shared is
N2, then the relation between N1, N2 beContrast plate-column structure do not set up diagonal prick post reinforcing bar before, just to four
Root pillar institute power should beIn this case, pillar is reducedThen pillar bearing load reduces percentage
Rate is
The technical proposal for solving the technical problem of the invention is：Prevent the structure that plate-column structure occurs continuous collapse from setting
In respect of 2 main points, the first provides standby load bang path for structure first；Which two is that local failure surrounding structure has foot
Enough degree more than needed support new route transmission load.Three technical schemes are proposed according to the two main points：It is right that the first increases in plate
Angle prick post reinforcing bar, contrast are original, and when pillar occurs punching failure with plate, the load on plate can pass to week by diagonal reinforcing bar
More pillars are enclosed, is no longer only four of surrounding, even if this model is pierced laterally collapse.Second
Plant is then that other steel bar stresses in oblique reinforcing bar and plate are waled (or welding) with reinforcing bar near pillar to form annular steel
Muscle cage.Reinforced binding around pillar is exactly lived by this steel hoop purpose, and after being conducive to pillar take-through plate, on plate, load is more
Uniform and stable passes to pillar around；The third then allows for the plate finite thickness of plate-column structure itself, if increasing right again
Angle steel muscle, certainly will occur the intensive phenomenon of reinforcing bar at bearing, be to solve this technical problem, be not passed through can oblique reinforcing bar
Pillar, welds to form continuous bar-mat reinforcement using above-mentioned steel hoop therewith, and being reached with this prevents plate-column structure from continuously breaking
Bad problem.(figure may be referred to accompanying drawing) wherein, in plate and pillar junction, diagonal prick post reinforcing bar can be matched somebody with somebody using formula is bent up
Muscle method, had so both improve the utilization rate of reinforcing bar, can also prevent the punching failure of plate-column structure.
The invention has the beneficial effects as follows:By the technology for increasing oblique prick post reinforcing bar to plate-column structure center pillar, prevention is reached
Plate-column structure continues to occur laterally after there is punching failure or is longitudinally continuous the purpose collapsed, and makes the fire-resistance of structure, antidetonation etc.
Disaster Defense Capability is significantly improved, and this kind of method economically feasible, technology are simple, it is easy to grasp, and is easy to construction, can be widely used for ground
The plate-column structures such as Underground Garage are taken precautions against natural calamities in consolidation process.It is effectively improved domestic and international plate-column structure opposing continuous collapse damage capability not enough
Present situation, plate-column structure and its safe condition of mixed structure is mutually coordinated with the urban economy with stable development.
Description of the drawings：
Accompanying drawing 1 is：Diagonal one profile of prick post reinforcing bar scheme；
Accompanying drawing 2 is；Diagonal two profile of prick post reinforcing bar scheme；
Accompanying drawing 3 is；Diagonal three profile of prick post reinforcing bar scheme；
Accompanying drawing 4 is；Diagonal prick post reinforcing bar sectional detail drawing at the bearing；
In figure, 1 is diagonal prick post reinforcing bar, and 2 is distribution bar, and 3 is steel hoop cage, and 4 is post, and 5 is floor.
Specific embodiment：
1. in plate, distribution bar is see the table below in addition to indicating：
2. plate span centre length is placed on short reinforcing bar to reinforcing bar；Bearing director is placed under the negative muscle of short to negative muscle.Floor
Enough Zhi Tie, cushion block should be set before pouring, to guarantee the accurate of reinforcement location in plate.
3. the bar-mat reinforcement colligation of plate is identical with basis, and two-way slab reinforcing bar cross point completely should be tied up.It should be noted that the negative steel on plate top
Muscle (face reinforcement) will prevent from being operated
4., when the arrangement of double-deck or multilamellar occurs in Reinforcement, the short steel with diameter 15mm should be padded between two placing of reinforcements
When muscle, such as longitudinal reinforcement are with diameter greater than 25mm, bar dowel diameter specifications and longitudinal reinforcement same size.
5. note to arrange that (plate neutral axis is managed in plate neutral axis deflection during the oblique prick post reinforcement construction that the present invention is mentioned
By above not stressing, if steel bar arrangement is on neutral axis, Essential Action is not had).
6. the steel hoop arrangement and method for construction that the present invention is mentioned is as follows：
(1) first, adjacent diagonal prick post reinforcing bar is held together with φ 12HRB335 reinforcing bars, forms discontinuous circumferential band
Muscle；
(2) again the adjacent reinforcing bar for having tied up is held together with the reinforcing bar of same size, forms continuous ring-shaped stirrup；
(3) diagonal prick post reinforcing bar can make bent-up bar, 45 degree of transfer angle at bearing.
Claims (4)
1. a kind of method of anti-plate-column structure continuous collapse, it is characterised in that：Standby load bang path is provided for structure；Office
Portion's destruction surrounding structure has have more than needed enough degree to support new route transmission load.
2. a kind of structure for realizing claim 1 methods described, is characterized in that：Floor neutral axis deflection it is upper install it is right
Angle prick post reinforcing bar, in sheet-pile junction, prick post bar connecting adjacent in floor is integral.
3. structure according to claim 2, is characterized in that：In diagonal prick post reinforcing bar and plate, other steel bar stresses form ring
Shape steel reinforcement cage.
4. structure according to claim 3, is characterized in that：Diagonal prick post reinforcing bar is not passed through pillar, using described annular
Reinforcing bar welds to form continuous bar-mat reinforcement therewith, and in plate and pillar junction, diagonal prick post reinforcing bar can be utilized and bend up formula arrangement of reinforcement
Method, 45 degree of transfer angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953230.9A CN106522445A (en) | 2016-10-27 | 2016-10-27 | Method and structure for preventing continuous collapse of slab-column structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953230.9A CN106522445A (en) | 2016-10-27 | 2016-10-27 | Method and structure for preventing continuous collapse of slab-column structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106522445A true CN106522445A (en) | 2017-03-22 |
Family
ID=58325677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610953230.9A Pending CN106522445A (en) | 2016-10-27 | 2016-10-27 | Method and structure for preventing continuous collapse of slab-column structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106522445A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6385930B1 (en) * | 1999-07-16 | 2002-05-14 | Carl-Erik Broms | Concrete structure and method of making it |
| CN2858823Y (en) * | 2006-01-05 | 2007-01-17 | 官锦禄 | Building shockproof structure improvement |
| RU2382154C1 (en) * | 2008-10-16 | 2010-02-20 | Государственное образовательное учреждение высшего профессионального образования "Российский университет дружбы народов" (РУДН) | Girderless ceiling |
| CN203230191U (en) * | 2013-04-12 | 2013-10-09 | 清华大学 | Reinforced structure for resisting progressive collapse of existing concrete structure |
| CN105926764A (en) * | 2016-06-13 | 2016-09-07 | 姚攀峰 | Industrialized pre-processed regenerative structural system and method for constructing same |
-
2016
- 2016-10-27 CN CN201610953230.9A patent/CN106522445A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6385930B1 (en) * | 1999-07-16 | 2002-05-14 | Carl-Erik Broms | Concrete structure and method of making it |
| CN2858823Y (en) * | 2006-01-05 | 2007-01-17 | 官锦禄 | Building shockproof structure improvement |
| RU2382154C1 (en) * | 2008-10-16 | 2010-02-20 | Государственное образовательное учреждение высшего профессионального образования "Российский университет дружбы народов" (РУДН) | Girderless ceiling |
| CN203230191U (en) * | 2013-04-12 | 2013-10-09 | 清华大学 | Reinforced structure for resisting progressive collapse of existing concrete structure |
| CN105926764A (en) * | 2016-06-13 | 2016-09-07 | 姚攀峰 | Industrialized pre-processed regenerative structural system and method for constructing same |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170322 |