CN105672591B - Existing reinforced concrete cranked slab stairs antidetonation reconstruction structure - Google Patents
Existing reinforced concrete cranked slab stairs antidetonation reconstruction structure Download PDFInfo
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- CN105672591B CN105672591B CN201610224451.2A CN201610224451A CN105672591B CN 105672591 B CN105672591 B CN 105672591B CN 201610224451 A CN201610224451 A CN 201610224451A CN 105672591 B CN105672591 B CN 105672591B
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- reinforcing bar
- waist slab
- slab
- waist
- concrete
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 78
- 239000004567 concrete Substances 0.000 claims abstract description 49
- 230000001050 lubricating effect Effects 0.000 claims abstract description 28
- 238000010276 construction Methods 0.000 claims abstract description 27
- 239000000725 suspension Substances 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 230000002787 reinforcement Effects 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 230000000384 rearing effect Effects 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 5
- 230000009466 transformation Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 230000006378 damage Effects 0.000 description 5
- 230000002411 adverse Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
The invention discloses existing reinforced concrete cranked slab stairs antidetonation reconstruction structure and construction technology, reconstruction structure includes stair stringer, waist slab end, connection reinforcing bar, concrete suspension bridging piece and lubricating pad；Waist slab end is the waist slab end that is separated after removing part concrete with stair stringer of waist slab side, connects reinforcing bar and plants at stair stringer, and stair stringer end face and adjacent with waist slab end is exposed in the one end for connecting reinforcing bar；Waist slab reinforcing bar has been poured in waist slab, waist slab reinforcing bar exposes waist slab end surface, the bared end of waist slab reinforcing bar and the bared end for being connected reinforcing bar are staggeredly adjacent, waist slab end connects lubricating pad with some fasteners, one end of lubricating pad and the concrete suspension bridging piece is soft to be connect, and the other end of concrete suspension bridging piece is fixed at stair stringer；To connect reinforcing bar and waist slab reinforcing bar as framework of steel reinforcement in concrete suspension bridging piece.The present invention can transform stair as the structure for possessing sliding support anti-seismic construction, and transformation process is smaller using influenceing on stair.
Description
Technical field
The present invention relates to the realm of building construction, especially existing reinforced concrete cranked slab stairs antidetonation reconstruction structure.
Background technology
Stair during with normal use in addition to vertical transportation function, come in natural calamities such as earthquake, fire it is interim,
Or it is important, be also likely to be unique passway for escaping.However, cast-in-situ reinforced concrete slab formula stair in Wenchuan earthquake in 2008
There is polytype destruction, and it is even more serious than the destruction of agent structure in frame building structure, can not play it should have
Function.Main cause is, during conventional structure design in ferroconcrete frame, only stair load is applied to chassis body knot
Structure, ignore the interaction of stair and agent structure and influence each other；Stair are individually designed, and only calculate bearing capacity, checking computations
Amount of deflection and crack, stair antidetonation and the adverse effect to chassis body structure are not considered.However, stair in the frame can in earthquake
Similar " K " shape diagonal bracing effect is played, increases the overall lateral rigidity of frame structure, shortening structure natural vibration period, increase structure institute
By geological process.This " K " shape diagonal bracing effect of stair, can also increase local stiffness, cause the internal force increase for closing on frame column, building
The asymmetric arrangement of ladder may also can make structure produce unexpected torsion.Under reciprocal horizontal geological process, in frame structure
Stair bear axial reciprocating tension and compression, span centre and away from waist slab at plate end up and down each 1/3 can bend downwarp, be broken or split
Concrete is squeezed broken wait and destroyed at seam.
At present, for premature degradation in stair earthquake and the adverse effect to chassis body structure, newly-built frame structure is
The unexpected destruction of stair in earthquake is generally avoided using sliding support anti-seismic construction form, eliminates stair to chassis body structure
Adverse effect.
But existing frame structure stair are still carried using the method for affixing steel plate or fibre reinforced plastics (FRP) sheet material
Its high shock resistance, prevents waist slab from being destroyed in advance in earthquake.But while this method increase stair shock resistance,
Also its rigidity can be increased, its " K " shape diagonal brace effect is than becoming apparent from before unguyed so that the computation model and reality of original structure design
Border structural difference is bigger, practical structures（The frame column especially closed on stair）It is potentially dangerous.
How the old frame structure stair of no sliding support structure are transform as and possess sliding support anti-seismic construction
Structure, it is a research direction.
The content of the invention
The present invention proposes existing reinforced concrete cranked slab stairs antidetonation reconstruction structure, can slide branch no simple and easyly
The old frame structure stair of holder structure transform the structure for possessing sliding support anti-seismic construction as, and transformation process makes to stair
It is smaller with influenceing.
The present invention uses following technical scheme.
Existing reinforced concrete cranked slab stairs antidetonation reconstruction structure, the reconstruction structure include stair stringer, waist slab end,
Connect reinforcing bar, concrete suspension bridging piece and lubricating pad；The waist slab end be waist slab side after removing part concrete and
The waist slab end of stair stringer separation；The connection reinforcing bar is planted at stair stringer, and stair stringer end face is exposed in the one end for connecting reinforcing bar
It is and adjacent with waist slab end；Waist slab reinforcing bar is poured in the waist slab, waist slab reinforcing bar exposes waist slab end surface, ladder
The bared end and the bared end for being connected reinforcing bar of section slab muscle are staggeredly adjacent；The waist slab end is connected with some fasteners to be lubricated
Pad, one end of lubricating pad and the concrete suspension bridging piece is soft to be connect, and the other end of concrete suspension bridging piece is fixed at stair stringer；Coagulation
To connect the framework of steel reinforcement of reinforcing bar and waist slab reinforcing bar as cast-in-place concrete in native cantilevered plate.
The lubricating pad is polyfluortetraethylene plate.
The fastener of the waist slab end connection lubricating pad is flat head screw, and the spacing of flat head screw is within 200mm.
The adjacent waist slab reinforcing bar that interlocks forms the framework of steel reinforcement of concrete suspension bridging piece with being connected reinforcing bar.
The construction technology of the reconstruction structure is divided into following steps.
A1, the construction area for delimiting waist slab end.
A2, any excess concrete for removing waist slab end, make waist slab be separated with stair stringer, waist slab reinforcing bar exposes simultaneously
It is in close proximity to stair stringer end surface.
A3, waist slab end lower surface fix lubricating pad；
A4, in stair stringer be implanted into connection reinforcing bar, make connection reinforcing bar one end expose stair stringer end face and with waist slab end
Portion is adjacent, and the bared end of waist slab reinforcing bar and the bared end for being connected reinforcing bar are staggeredly adjacent.
A5, in waist slab reinforcing bar set up template with being connected the interlock the week side of boss of adjacent area of reinforcing bar, casting concrete, staggeredly phase
Adjacent waist slab reinforcing bar formation of concrete cantilevered plate, completes construction with being connected reinforcing bar as framework of steel reinforcement.
In step A1, waist slab end is divided into left side and right side, wherein side are first changed as construction area
Make, opposite side normal pass.
In step A5, in casting concrete, it is allowed to isolate with pouring construction with covered rearing with plastic film lubricating pad.
The waist slab end is located at the lower end of waist slab.
In the present invention, constructed only for the waist slab end of waist slab and stair stringer connecting place, it is total not change stair
Body structure, after stair are engineered, stair design a model consistent with overall structure actual loading situation with original in earthquake, without right
Overall structure re-starts seismic resistance calculation, has saved cost.
In the present invention, the waist slab end connects lubricating pad with some fasteners, and lubricating pad is encorbelmented with the concrete
One end of plate is soft to be connect, and the other end of concrete suspension bridging piece is fixed at stair stringer；The design causes improved waist slab lower end
Face is separated with agent structure, and reciprocal tension and compression effect is not subject in earthquake, can be carried from earthquake damage for earthquake escape or rescue
For unobstructed passage.
In the present invention, because improved waist slab lower surface separates with agent structure, it is not subject to back and forth draw in earthquake
Pressure acts on, therefore can eliminate stair and overall structure is adversely affected, and it is unexpected to eliminate the structure that stair mal-distribution is brought
Reverse, the internal force of frame column adjacent thereto under geological process will not be increased, can protect waist slab, close on frame column, landing slab and
Terraced beam etc. reduces structure potential danger from seismic Damage.
In the present invention, when delimiting construction area, waist slab end is divided into left side and right side, wherein side is used as and applied
Work area domain is first transformed, opposite side normal pass；The design can allow waist slab in construction still with original load-carrying construction
Half undertakes stress, so as to ensure that the stabilization in waist slab seismic retrofitting procedures, moreover it is possible to before not interrupting stair and using
Completion transformation is put, is not easy to bring inconvenience to owner's life because of improvement project.
In the present invention, internal reinforcing bar, the reinforcing bar of concrete suspension bridging piece are retained when removing the concrete of waist slab end
Former waist slab reinforcing bar in frame be present so that the load-carrying construction of this reconstruction structure can continue to use the load-carrying construction of original waist slab, reduce
Engineering design amount, and advantageously reduce engineering material cost.
Brief description of the drawings
The present invention is described in more detail with reference to the accompanying drawings and detailed description：
Accompanying drawing 1 is the schematic diagram of the present invention；
Accompanying drawing 2 is the close-up schematic view of waist slab end in the present invention；
Accompanying drawing 3 is the cut-away illustration on the other direction of waist slab end in the present invention；
Accompanying drawing 4 is the schematic diagram at lubricating pad in the present invention；
In figure：The left side of 1- waist slabs end；The right side of 2- waist slabs end；3- waist slabs end；4- stair stringers；5- ladders
The concrete that section plate end need to remove；6- waist slab reinforcing bars；7- waist slabs end lower surface；8- fasteners；9- lubricating pads；10-
Connect reinforcing bar；11- concrete suspension bridging pieces；12- waist slab reinforcing bars.
Embodiment
As shown in Figure 1, Figure 2, Figure 3, Figure 4, existing reinforced concrete cranked slab stairs antidetonation reconstruction structure, the reconstruction structure
Including stair stringer 4, waist slab end 3, connection reinforcing bar 10, concrete suspension bridging piece 11 and lubricating pad 9；The waist slab end 3 is
The waist slab end that waist slab side separates after removing part concrete with stair stringer 4；The connection reinforcing bar 10 is planted in stair
Stair stringer end face and adjacent with waist slab end 3 is exposed in Liang4Chu, one end of connection reinforcing bar 10；Bench has been poured in the waist slab
Slab muscle 6, waist slab reinforcing bar 6,12 expose the surface of waist slab end 3, and the bared end of waist slab reinforcing bar 6,12 is with being connected reinforcing bar 10
Bared end it is staggeredly adjacent, the waist slab end 3 connects lubricating pad 9, lubricating pad 9 and the concrete with some fasteners 8
One end of cantilevered plate 11 is soft to be connect, and the other end of concrete suspension bridging piece 11 is fixed at stair stringer 4；Poured into concrete suspension bridging piece 11
Reinforcing bar 10 and waist slab reinforcing bar 6,12 are connected, concrete suspension bridging piece 11 is interior to be to connect reinforcing bar 10 and waist slab reinforcing bar 6,12
The framework of steel reinforcement of cast-in-place concrete.
The lubricating pad 9 is polyfluortetraethylene plate.
The fastener 8 that the waist slab end 3 connects lubricating pad 9 is flat head screw, the spacing of flat head screw 200mm with
It is interior.
The adjacent waist slab reinforcing bar 6,12 that interlocks forms the framework of steel reinforcement of concrete suspension bridging piece with being connected reinforcing bar 10.
The construction technology of the reconstruction structure is divided into following steps.
A1, the construction area for delimiting waist slab end.
Any excess concrete 5 at A2, removal waist slab end 3, makes waist slab be separated with stair stringer, waist slab reinforcing bar 6,12
Expose and be in close proximity to the surface of stair stringer 4.
A3, the lower surface 7 of waist slab end 3 fix lubricating pad 9；
A4, stair stringer 4 be implanted into connection reinforcing bar 10, make connection reinforcing bar 10 one end expose the end face of stair stringer 4 and with ladder
Section plate end 3 is adjacent, and the bared end of waist slab reinforcing bar 6,12 and the bared end for being connected reinforcing bar 10 are staggeredly adjacent.
A5, in waist slab reinforcing bar 6,12 set up template with being connected the interlock the week side of boss of adjacent area of reinforcing bar 10, casting concrete,
Staggeredly adjacent waist slab reinforcing bar 6,12 is used as framework of steel reinforcement with being connected reinforcing bar 10, formation of concrete cantilevered plate 11, completes construction.
In step A1, waist slab end 3 is divided into left side 1 and right side 2, wherein side is first carried out as construction area
Transformation, opposite side normal pass.
In step A5, in casting concrete, it is allowed to isolate with pouring construction with covered rearing with plastic film lubricating pad.
The waist slab end is located at the lower end of waist slab.
Embodiment：
By waist slab using axis as boundary, left side 1 and right side 2 are divided into, selects wherein side first to be transformed, is ensured another
Side normal pass.Waist slab end 3 and stair stringer 4 are separated in the horizontal direction in the bottom of waist slab end 3, and part
The concrete 5 of former waist slab end 3 is removed, retains the former bottom reinforcement bars 6,12 of waist slab end 3.Cement mortar screeding waist slab end
The lower surface 7 of portion 3, make it higher than the upper surface 5mm of stair stringer 4.5mm is fixed using flat head screw 8 of the spacing no more than 200mm
Thick polyfluortetraethylene plate 9 forms lubricating pad 9 in waist slab end lower surface 7.Connection reinforcing bar 10 is drilled described in implantation
In stair stringer 4, framework of steel reinforcement is collectively forming with the former waist slab end reinforcing bar 6,12, and set up template casting concrete and encorbelment
Plate 11.The cantilevered plate 11 is isolated with the lubricating pad 9 using plastic sheeting when pouring, and treats that the cantilevered plate 11 reaches rule
After determining concrete strength, opposite side antidetonation is transformed using same procedure.
Claims (5)
1. existing reinforced concrete cranked slab stairs antidetonation reconstruction structure, it is characterised in that：The reconstruction structure includes stair stringer, ladder
Section plate end, connection reinforcing bar, concrete suspension bridging piece and lubricating pad；The waist slab end is that waist slab side is mixed through removing part
The waist slab end separated after solidifying soil with stair stringer；The connection reinforcing bar is planted at stair stringer, and building is exposed in the one end for connecting reinforcing bar
Terraced beam-ends face is simultaneously adjacent with waist slab end；Waist slab reinforcing bar is poured in the waist slab, waist slab reinforcing bar exposes waist slab end
Portion surface, the bared end of waist slab reinforcing bar and the bared end for being connected reinforcing bar are staggeredly adjacent, and the waist slab end is with some fastenings
Part connects lubricating pad, and one end of lubricating pad and the concrete suspension bridging piece is soft to be connect, and the other end of concrete suspension bridging piece is fixed in building
Terraced Liang Chu；To connect the framework of steel reinforcement of reinforcing bar and waist slab reinforcing bar as cast-in-place concrete in concrete suspension bridging piece；
The waist slab end is located at the lower end of waist slab；
The adjacent waist slab reinforcing bar that interlocks forms the framework of steel reinforcement of concrete suspension bridging piece with being connected reinforcing bar；
Waist slab reinforcing bar in concrete suspension bridging piece framework of steel reinforcement enables concrete suspension bridging piece load-carrying construction to continue to use waist slab
Load-carrying construction；
The construction technology of the reconstruction structure is divided into following steps；
A1, the construction area for delimiting waist slab end；
A2, any excess concrete for removing waist slab end, make waist slab be separated with stair stringer, waist slab reinforcing bar expose and close to
In stair stringer end surface；
A3, waist slab end lower surface fix lubricating pad；
A4, in stair stringer be implanted into connection reinforcing bar, make connection reinforcing bar one end expose stair stringer end face and with waist slab end phase
Neighbour, the bared end of waist slab reinforcing bar and the bared end for being connected reinforcing bar are staggeredly adjacent；
A5, in waist slab reinforcing bar template is set up with being connected the interlock the week side of boss of adjacent area of reinforcing bar, casting concrete is staggeredly adjacent
Waist slab reinforcing bar formation of concrete cantilevered plate, completes construction with being connected reinforcing bar as framework of steel reinforcement.
2. existing reinforced concrete cranked slab stairs antidetonation reconstruction structure according to claim 1, it is characterised in that：The profit
Skidding is polyfluortetraethylene plate.
3. existing reinforced concrete cranked slab stairs antidetonation reconstruction structure according to claim 1, it is characterised in that：The ladder
The fastener of section plate end connection lubricating pad is flat head screw, and the spacing of flat head screw is within 200mm.
4. existing reinforced concrete cranked slab stairs antidetonation reconstruction structure according to claim 1, it is characterised in that：In step
In A1, waist slab end is divided into left side and right side, wherein side are first transformed as construction area, the positive normal open of opposite side
OK.
5. existing reinforced concrete cranked slab stairs antidetonation reconstruction structure according to claim 1, it is characterised in that：In step
In A5, in casting concrete, it is allowed to isolate with pouring construction with covered rearing with plastic film lubricating pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610224451.2A CN105672591B (en) | 2016-04-12 | 2016-04-12 | Existing reinforced concrete cranked slab stairs antidetonation reconstruction structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610224451.2A CN105672591B (en) | 2016-04-12 | 2016-04-12 | Existing reinforced concrete cranked slab stairs antidetonation reconstruction structure |
Publications (2)
| Publication Number | Publication Date |
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| CN105672591A CN105672591A (en) | 2016-06-15 |
| CN105672591B true CN105672591B (en) | 2018-01-12 |
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| CN201610224451.2A Expired - Fee Related CN105672591B (en) | 2016-04-12 | 2016-04-12 | Existing reinforced concrete cranked slab stairs antidetonation reconstruction structure |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108277937A (en) * | 2018-03-28 | 2018-07-13 | 中国地震局工程力学研究所 | A kind of reinforced concrete stairs seismic reinforcing structure and its remodeling method |
| CN113404322B (en) * | 2021-06-15 | 2023-05-09 | 中国电建集团贵阳勘测设计研究院有限公司 | Method for reforming steel ladder into concrete stair in high-rise concrete structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3271812B2 (en) * | 1993-01-27 | 2002-04-08 | 株式会社竹中工務店 | Staircase equipment |
| CN102605909A (en) * | 2012-04-06 | 2012-07-25 | 北京工业大学 | Reinforced concrete platy stair with simple sliding support and construction method |
| CN203008257U (en) * | 2012-10-23 | 2013-06-19 | 新疆七星建设科技股份有限公司 | Sliding support of stair and concrete precast stair |
| CN103758299B (en) * | 2014-02-08 | 2016-08-17 | 江苏中南建筑产业集团有限责任公司 | The antidetonation stair of tool sliding support and construction method thereof |
| CN204456693U (en) * | 2014-12-19 | 2015-07-08 | 中国联合工程公司 | A kind of steel work stringer type stairway slidably hinged-support of deck type step plate |
| CN204753998U (en) * | 2015-04-18 | 2015-11-11 | 山西二建集团有限公司 | Antidetonation concrete stair node structure |
| CN205617686U (en) * | 2016-04-12 | 2016-10-05 | 福州大学 | Structure is reformed transform to existing reinforced concrete formula stair antidetonation |
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2016
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Granted publication date: 20180112 |