CN205617686U - Structure is reformed transform to existing reinforced concrete formula stair antidetonation - Google Patents
Structure is reformed transform to existing reinforced concrete formula stair antidetonation Download PDFInfo
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- CN205617686U CN205617686U CN201620301446.2U CN201620301446U CN205617686U CN 205617686 U CN205617686 U CN 205617686U CN 201620301446 U CN201620301446 U CN 201620301446U CN 205617686 U CN205617686 U CN 205617686U
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Abstract
The utility model discloses a structure is reformed transform to existing reinforced concrete formula stair antidetonation reforms transform the structure and includes building ladder beam, bench board tip, connecting reinforcement, concrete encorbelment board and lubricating pad, bench board tip is the bench board tip that separate bench board one side with building ladder beam after getting rid of partial concrete, connecting reinforcement plants the department in building ladder beam, and building ladder beam terminal surface and adjacent with bench board tip is exposed to connecting reinforcement's one end, the bench inboard has watered bench slab muscle, and bench slab muscle exposes bench board tip surface, and the exposed end of bench slab muscle and connecting reinforcement's exposed end are crisscross adjacent, and the lubricating pad is connected with a plurality of fasteners to bench board tip, the lubricating pad with encorbelment other end rigid coupling in the building ladder beam department of board of encorbelment gentle the connecing of one end of board of concrete, concrete, the concrete is encorbelmented the inboard and is used connecting reinforcement and bench slab muscle as steel bones RACK. The utility model discloses can transform stair as possess sliding support antidetonation structure structure, the transformation process uses the influence less to stair.
Description
Technical field
This utility model relates to the realm of building construction, especially existing reinforced concrete cranked slab stairs antidetonation reconstruction structure.
Background technology
Stair except having during normal use in addition to vertical transportation function, the natural disaster such as earthquake, fire come interim or important, be also likely to be unique passway for escaping.But, in Wenchuan earthquakes in 2008, there is polytype destruction in cast-in-situ reinforced concrete slab formula stair, and even more serious than the destruction of agent structure in frame building structure, it is impossible to play its due function.Main cause is, during conventional structure design in ferroconcrete frame, only stair load is applied to chassis body structure, ignores stair and the interaction of agent structure and influence each other；Stair are individually designed, and only calculate bearing capacity, checking computations amount of deflection and crack, do not consider stair antidetonation and the adverse effect to chassis body structure.But, in earthquake, stair can play similar " K " shape diagonal bracing effect in the frame, increases the overall lateral rigidity of frame structure, shortening structure natural vibration period, increases geological process suffered by structure.Stair this " K " shape diagonal bracing effect, also can increase local stiffness, causes the internal force closing on frame column to increase, and the asymmetric arrangement of stair is likely to make structure produce unexpected torsion.Under reciprocal horizontal geological process, the stair in frame structure bear axial reciprocating tension and compression, at span centre with at plate end the most each 1/3, waist slab can bend that concrete at downwarp, fracture or crack is squeezed broken etc. to be destroyed.
At present, for premature degradation in stair earthquake and the adverse effect to chassis body structure, newly-built frame structure the most commonly used sliding support anti-seismic construction form avoids the unexpected destruction of stair in earthquake, eliminates the stair adverse effect to chassis body structure.
But existing frame structure stair still use the method for affixing steel plate or fibre reinforced plastics (FRP) sheet material to improve its shock resistance, prevent waist slab from destroying in advance in earthquake.But while this method increases stair shock resistance, also its rigidity can be increased, its " K " shape diagonal brace effect becomes apparent from before unguyed so that the computation model of original structure design and practical structures difference are bigger, and practical structures (frame column especially closed on stair) is potentially dangerous.
How the old frame structure stair not having sliding support structure are transform as the structure possessing sliding support anti-seismic construction, be a research direction.
Summary of the invention
The utility model proposes existing reinforced concrete cranked slab stairs antidetonation reconstruction structure, the old frame structure stair not having sliding support structure can be transform as the structure possessing sliding support anti-seismic construction simple and easyly, and stair are used impact less by transformation process.
This utility model is by the following technical solutions.
Existing reinforced concrete cranked slab stairs antidetonation reconstruction structure, described reconstruction structure includes stair stringer, waist slab end, connects reinforcing bar, concrete suspension bridging piece and lubricating pad；Described waist slab end is the waist slab end that waist slab side separates with stair stringer after removing part concrete；Described connection reinforcing bar is planted at stair stringer, and stair stringer end face adjacent with waist slab end is exposed in the one end connecting reinforcing bar；Having watered waist slab reinforcing bar in described waist slab, waist slab reinforcing bar exposes waist slab end surface, and the bared end of waist slab reinforcing bar interlocks adjacent with the bared end connecting reinforcing bar；Described waist slab end connects lubricating pad with some securing members, and lubricating pad is soft with one end of described concrete suspension bridging piece to be connect, and the other end of concrete suspension bridging piece is fixed at stair stringer；To connect reinforcing bar and the waist slab reinforcing bar framework of steel reinforcement as cast-in-place concrete in concrete suspension bridging piece.
Described lubricating pad is polyfluortetraethylene plate.
It is flat head screw that described waist slab end connects the securing member of lubricating pad, and the spacing of flat head screw is within 200mm.
Described staggered adjacent waist slab reinforcing bar forms the framework of steel reinforcement of concrete suspension bridging piece with being connected reinforcing bar.
The construction technology of described reconstruction structure is divided into following steps.
A1, the construction area of delimitation waist slab end.
A2, any excess concrete of removal waist slab end, make waist slab separate with stair stringer, and waist slab reinforcing bar exposes and is in close proximity to stair stringer end surface.
A3, fix lubricating pad in lower surface, waist slab end；
A4, being implanted into connection reinforcing bar at stair stringer, make one end of connection reinforcing bar expose stair stringer end face adjacent with waist slab end, the bared end of waist slab reinforcing bar interlocks adjacent with the bared end connecting reinforcing bar.
A5, set up template at waist slab reinforcing bar with being connected interlock all sides of adjacent area of reinforcing bar, casting concrete, staggered adjacent waist slab reinforcing bar be connected reinforcing bar as framework of steel reinforcement, formation of concrete cantilevered plate, complete to construct.
In step A1, waist slab end being divided into left side and right side, wherein side is first transformed as construction area, opposite side normal pass.
In step A5, when casting concrete, it is allowed to isolate with pouring construction with covered rearing with plastic film lubricating pad.
Described waist slab end is positioned at the lower end of waist slab.
In this utility model, construct in waist slab end only for waist slab with stair stringer connecting place, do not change stair population structure, after stair are engineered, in earthquake, stair are consistent with original design model with overall structure actual loading situation, without overall structure is re-started seismic resistance calculation, save cost.
In this utility model, described waist slab end connects lubricating pad with some securing members, and lubricating pad is soft with one end of described concrete suspension bridging piece to be connect, and the other end of concrete suspension bridging piece is fixed at stair stringer；This design makes improved waist slab lower surface separate with agent structure, is not subject to reciprocal tension and compression effect in earthquake, can provide unobstructed passage from earthquake damage for earthquake escape or rescue.
In this utility model; owing to improved waist slab lower surface separates with agent structure; reciprocal tension and compression effect it is not subject in earthquake; therefore stair can be eliminated to overall structure adverse effect; eliminate the unexpected torsion of structure that stair mal-distribution brings; the internal force being adjacent frame column under geological process will not be increased, waist slab can be protected, close on frame column, landing slab and ladder beam etc. from seismic Damage, reduction structure potential danger.
In this utility model, when delimiting construction area, waist slab end being divided into left side and right side, wherein side is first transformed as construction area, opposite side normal pass；This design can allow waist slab when construction still with the half of original load-carrying construction to undertake stress, thus ensure that stablizing in waist slab seismic retrofitting procedures, transformation can also be completed on the premise of using not interrupting stair, be difficult to because of improvement project, owner's life be brought inconvenience.
In this utility model, internal reinforcing bar is retained when removing the concrete of waist slab end, former waist slab reinforcing bar is there is in the framework of steel reinforcement of concrete suspension bridging piece, the load-carrying construction making 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.
Accompanying drawing explanation
Explanation further details of to this utility model with detailed description of the invention below in conjunction with the accompanying drawings:
Accompanying drawing 1 is schematic diagram of the present utility model；
Accompanying drawing 2 is the close-up schematic view of waist slab end in this utility model；
Accompanying drawing 3 is the cut-away illustration in this utility model on the other direction of waist slab end；
Accompanying drawing 4 is the schematic diagram in this utility model at lubricating pad；
In figure: the left side of 1-waist slab end；The right side of 2-waist slab end；3-waist slab end；4-stair stringer；The concrete that 5-waist slab end need to be removed；6-waist slab reinforcing bar；Lower surface, 7-waist slab end；8-securing member；9-lubricating pad；10-connects reinforcing bar；11-concrete suspension bridging piece；12-waist slab reinforcing bar.
Detailed description of the invention
As shown in Figure 1, Figure 2, Figure 3, Figure 4, existing reinforced concrete cranked slab stairs antidetonation reconstruction structure, described reconstruction structure includes stair stringer 4, waist slab end 3, connects reinforcing bar 10, concrete suspension bridging piece 11 and lubricating pad 9；Described waist slab end 3 is the waist slab end that waist slab side separates with stair stringer 4 after removing part concrete；Described connection reinforcing bar 10 is planted at stair stringer 4, and stair stringer end face adjacent with waist slab end 3 is exposed in the one end connecting reinforcing bar 10；Waist slab reinforcing bar 6 has been watered in described waist slab, waist slab reinforcing bar 6,12 exposes surface, waist slab end 3, the bared end of waist slab reinforcing bar 6,12 interlocks adjacent with the bared end connecting reinforcing bar 10, described waist slab end 3 connects lubricating pad 9 with some securing members 8, lubricating pad 9 is soft with one end of described concrete suspension bridging piece 11 to be connect, and the other end of concrete suspension bridging piece 11 is fixed at stair stringer 4；Concrete suspension bridging piece 11 pours into connection reinforcing bar 10 and waist slab reinforcing bar 6,12, to connect reinforcing bar 10 and the waist slab reinforcing bar 6,12 framework of steel reinforcement as cast-in-place concrete in concrete suspension bridging piece 11.
Described lubricating pad 9 is polyfluortetraethylene plate.
It is flat head screw that described waist slab end 3 connects the securing member 8 of lubricating pad 9, and the spacing of flat head screw is within 200mm.
Described staggered adjacent waist slab reinforcing bar 6,12 forms the framework of steel reinforcement of concrete suspension bridging piece with being connected reinforcing bar 10.
The construction technology of described reconstruction structure is divided into following steps.
A1, the construction area of delimitation waist slab end.
Any excess concrete 5 at A2, removal waist slab end 3, makes waist slab separate with stair stringer, and waist slab reinforcing bar 6,12 exposes and is in close proximity to surface, stair stringer 4 end 3.
A3, fix lubricating pad 9 in lower surface, waist slab end 37；
A4, being implanted into connection reinforcing bar 10 at stair stringer 4, make one end of connection reinforcing bar 10 expose stair stringer 4 end face adjacent with waist slab end 3, the bared end of waist slab reinforcing bar 6,12 interlocks adjacent with the bared end of connection reinforcing bar 10.
A5, set up template at waist slab reinforcing bar 6,12 with being connected interlock all sides of adjacent area of reinforcing bar 10, casting concrete, staggered adjacent waist slab reinforcing bar 6,12 be connected reinforcing bar 10 as framework of steel reinforcement, formation of concrete cantilevered plate 11, complete to construct.
In step A1, waist slab end 3 being divided into left side 1 and right side 2, wherein side is first transformed as construction area, opposite side normal pass.
In step A5, when casting concrete, it is allowed to isolate with pouring construction with covered rearing with plastic film lubricating pad.
Described waist slab end is positioned at the lower end of waist slab.
Embodiment:
By waist slab with axis as boundary, it is divided into left side 1 and right side 2, selects wherein side first to transform, it is ensured that opposite side normal pass.Waist slab end 3 and stair stringer 4 are separated bottom described waist slab end 3 in the horizontal direction, and part removes the concrete 5 of former waist slab end 3, retains former waist slab end 3 bottom reinforcement bars 6,12.Lower surface, cement mortar screeding waist slab end 37 so that it is higher than described stair stringer 4 upper surface 5mm.The flat head screw 8 using spacing to be not more than 200mm is fixed polyfluortetraethylene plate 9 thick for 5mm and is formed lubricating pad 9 in described waist slab end lower surface 7.Connection reinforcing bar 10 is holed in the described stair stringer 4 of implantation, be collectively forming framework of steel reinforcement with described former waist slab end reinforcing bar 6,12, and set up template casting concrete cantilevered plate 11.When pouring, described cantilevered plate 11 uses plastic sheeting to isolate with described lubricating pad 9, after described cantilevered plate 11 reaches regulation concrete strength, uses same procedure to transform opposite side antidetonation.
Claims (5)
1. existing reinforced concrete cranked slab stairs antidetonation reconstruction structure, it is characterised in that: described reconstruction structure includes stair stringer, waist slab end, connects reinforcing bar, concrete suspension bridging piece and lubricating pad；Described waist slab end is the waist slab end that waist slab side separates with stair stringer after removing part concrete；Described connection reinforcing bar is planted at stair stringer, and stair stringer end face adjacent with waist slab end is exposed in the one end connecting reinforcing bar；Waist slab reinforcing bar has been watered in described waist slab, waist slab reinforcing bar exposes waist slab end surface, the bared end of waist slab reinforcing bar interlocks adjacent with the bared end connecting reinforcing bar, described waist slab end connects lubricating pad with some securing members, lubricating pad is soft with one end of described concrete suspension bridging piece to be connect, and the other end of concrete suspension bridging piece is fixed at stair stringer；To connect reinforcing bar and the waist slab reinforcing bar framework of steel reinforcement as cast-in-place concrete in concrete suspension bridging piece.
Existing reinforced concrete cranked slab stairs antidetonation reconstruction structure the most according to claim 1, it is characterised in that: described lubricating pad is polyfluortetraethylene plate.
Existing reinforced concrete cranked slab stairs antidetonation reconstruction structure the most according to claim 1, it is characterised in that: it is flat head screw that described waist slab end connects the securing member of lubricating pad, and the spacing of flat head screw is within 200mm.
Existing reinforced concrete cranked slab stairs antidetonation reconstruction structure the most according to claim 1, it is characterised in that: described staggered adjacent waist slab reinforcing bar forms the framework of steel reinforcement of concrete suspension bridging piece with being connected reinforcing bar.
Existing reinforced concrete cranked slab stairs antidetonation reconstruction structure the most according to claim 1, it is characterised in that: described waist slab end is positioned at the lower end of waist slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620301446.2U CN205617686U (en) | 2016-04-12 | 2016-04-12 | Structure is reformed transform to existing reinforced concrete formula stair antidetonation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620301446.2U CN205617686U (en) | 2016-04-12 | 2016-04-12 | Structure is reformed transform to existing reinforced concrete formula stair antidetonation |
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| CN205617686U true CN205617686U (en) | 2016-10-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672591A (en) * | 2016-04-12 | 2016-06-15 | 福州大学 | Existing reinforced concrete plate type stair aseismatic reconstruction structure and construction technology |
-
2016
- 2016-04-12 CN CN201620301446.2U patent/CN205617686U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672591A (en) * | 2016-04-12 | 2016-06-15 | 福州大学 | Existing reinforced concrete plate type stair aseismatic reconstruction structure and construction technology |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 |