CN102425257B - Self-centering pre-stressed concrete framework floor slab structure - Google Patents
Self-centering pre-stressed concrete framework floor slab structure Download PDFInfo
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- CN102425257B CN102425257B CN 201110430239 CN201110430239A CN102425257B CN 102425257 B CN102425257 B CN 102425257B CN 201110430239 CN201110430239 CN 201110430239 CN 201110430239 A CN201110430239 A CN 201110430239A CN 102425257 B CN102425257 B CN 102425257B
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Abstract
The invention discloses a self-centering pre-stressed concrete framework floor slab structure, which comprises spans with the quantity of N which are horizontally arranged, wherein each span comprises four main beams, secondary beams with the quantity of M, four framework columns and floor slabs, wherein the main beams are arranged between two adjacent framework columns through a pre-stressed steel stranded wire, each secondary beam is arranged between two opposite main beams, and the floor slab is arranged above the main beams and the secondary beams; every two adjacent spans share one main beam and two framework columns, in one of the spans, the secondary beams and the two main beams which are connected with the secondary beams are respectively and fixedly connected with the floor slab through a tightening device, and the rest two main beams are connected with the floor slab through a sliding device; and in each span of the rest spans, the main beams and the secondary beams are respectively connected with the floor slab through the sliding device. Under the action of single-direction earthquake, due to the adoption of the concrete framework floor slab structure, the damage to the self-centering pre-stressed concrete framework caused by the restriction effect of the floor slab can be reduced.
Description
Technical field
The present invention relates to a kind of framed floor structure, specifically, relate to a kind of self-centering prestressed concrete frame floor slab structure.
Background technology
Traditional cast-in-situ concrete framed floor structure is that floor is carried out cast-in-place the connection with beam.Specifically, self-centering prestressed concrete frame comprises striding of N horizontal arrangement, N is the integer greater than 1, each strides four girders, the M root secondary beam that comprises rectangular layout, M is the integer greater than 1, four frame columns and floor, and girder is connected between two adjacent frame columns by prestress wire, secondary beam is connected between two relative girders, and floor is positioned at the top of girder and secondary beam.A shared girder and two frame columns between adjacent the striding.For the self-centering concrete frame,, then between floor and the girder, and all adopt the mode of cast-in-place concrete to carry out fixedly connected between floor and the secondary beam if adopt the cast-in-place concrete floor structure.When the concrete frame floor slab structure of this fixed form under geological process, when girder separated with the frame column interface, floor can retrain the folding behavior at girder and frame column interface.If the restraint forces that cast-in-place concrete floor provides is stronger, tangible destruction is not taken place, then can produce very big restraint forces, and destroy the self-centering ability of self-centering prestressed concrete frame joint, thereby influence integrally-built anti-seismic performance framework.
Summary of the invention
Technical problem:Technical problem to be solved by this invention is: a kind of self-centering prestressed concrete frame floor slab structure is provided, this concrete frame floor slab structure can be under unidirectional geological process, reduce the damage that self-centering prestressed concrete frame causes because of the floor effect of restraint, thereby reduce the cost that repair the shake back.
Technical scheme:For solving the problems of the technologies described above, self-centering prestressed concrete frame floor slab structure of the present invention, this concrete frame floor slab structure comprises striding of N horizontal arrangement, N is the integer greater than 1, each is striden and comprises four girders, M root secondary beam, M is the integer greater than 1, four frame columns and floor, girder is connected between two adjacent frame columns by prestress wire, girder and frame column are formed rectangular frame, secondary beam is connected between two relative girders, and floor is positioned at the top of girder and secondary beam; An adjacent shared girder and two frame columns of striding, at a described N span centre of striding, secondary beam, and two girders that are connected with secondary beam are fixedlyed connected with floor by fastener respectively, all the other two girders are connected with floor by slide device, and these two girders can slide by slide device relatively with floor; At each span centre of remainder, girder is connected with floor by slide device respectively with secondary beam, and girder can slide with floor by slide device respectively relatively with secondary beam.
Beneficial effect:Compared with prior art, the present invention has following beneficial effect:
1.Under the uniaxially shock effect, reduce the damage that self-centering prestressed concrete frame causes because of the floor effect of restraint.In the technical scheme of the present invention, at a plurality of span centres of forming the concrete frame floor slab structure, at any one span centre, secondary beam is fixedlyed connected with floor respectively with two girders, at remaining other span centres, secondary beam can slide with floor respectively relatively with girder.Self-centering prestressed concrete frame is under the uniaxially shock effect, when the contact surface of girder and frame column opens behavior, floor is along with doing horizontal movement with its fixedly connected girder and secondary beam, and step up generation at other and slide relatively, the concrete frame floor substantially still is in elastic range.After the geological process, frame construction is returned to original vertical center (self-centering) under the effect of steel strand prestress, thereby reduces the permanent set of concrete frame floor slab structure under geological process greatly.Adopt self-centering prestressed concrete frame floor slab structure of the present invention, after the uniaxially vibrations finish, because the distortion of girder, secondary beam and frame column can be controlled in the elastic range,, thereby reduce the cost that repair the shake back so the concrete frame floor slab structure is harmless.
2. structural cost is low.Member among the present invention can be prefabricated in the factory, and assembled on site helps accelerating construction progress, ensures the quality of products and reduces cost of labor then.
Description of drawings
Fig. 1 is extensional deformation figure of the present invention.
Fig. 2 is a floor map of the present invention.
Fig. 3 is the A-A section of Fig. 2.
Fig. 4 is the B-B section of Fig. 2.
Fig. 5 is the C-C section of Fig. 2.
Fig. 6 is the D-D section of Fig. 2.
Have among the figure: 1. stride, 2. girder, 3. secondary beam, 4. frame column, 5. floor; 6. fastener, 7. slide device, 8. shearing resistance pin, 9. the cement mortar screeding layer is 10. gone up sliding plate; 11. down-shift board.
The specific embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is further described.
Shown in Fig. 1 to 6, what a kind of self-centering prestressed concrete frame floor slab structure of the present invention, this concrete frame floor slab structure comprised N horizontal arrangement strides 1, and N is the integer greater than 1, and for example N can be 2,3 or 4.In Fig. 2, N is 2.Each is striden 1 and comprises four girders 2, M root secondary beam 3, and M is the integer greater than 1, four frame columns 4 and floor 5.Girder 2 is connected between two adjacent frame columns 4 by prestress wire, and girder 2 and frame column 4 are formed rectangular frame.Secondary beam 3 is connected between two relative girders 2.Floor 5 is positioned at the top of girder 2 and secondary beam 3.Stride in 1 at one, the quantity of secondary beam 3 is decided according to actual demands of engineering.In Fig. 2, adopt two secondary beams 3.Stride with stride between be connected the form that adopts sharing structure.As shown in Figure 2, adjacent 1 a shared girder 2 and two frame columns 4 of striding.Stride a span centre of 1 at N, secondary beam 3, and two girders 2 that are connected with secondary beam 3 are fixedlyed connected with floor 5 by fastener 6 respectively; All the other two girders 2 are connected with floor 5 by slide device 7, and these two girders 2 can slide by slide device 2 relatively with floor 5.At each span centre of remainder, girder 2 is connected with floor 5 by slide device 7 respectively with secondary beam 3, and girder 2 can slide with floor 5 by slide device 7 respectively relatively with secondary beam 3.
During installation, in place with prefabricate reinforced concrete frame girder 2, secondary beam 3 and frame column 4 through on-site hoisting, prestress wire is passed the duct of reserving in girder 2 and the frame column 4, carry out the prestressed stretch-draw of main beam in frame 2.Afterwards, prefabricate reinforced concrete floor 5 is fixedly connected on the secondary beam of striding and two girders of prestressed frame with shearing resistance pin 8.For guaranteeing that the self-centering framework is not subjected to the constraint of floor 5, on other girders of striding of self-centering framework and secondary beam, horizontal sliding device 7 is set.The self-centering prestressed concrete frame floor slab structure is a kind of novel structural system, main beam in frame 2 combines by horizontally disposed prestress wire and frame column 4, and shearing is born by frictional force or dissipative cell on the contact surface between girder 2 and the frame column 4.When the earthquake effect increased to a certain degree, the contact surface of girder 2 and frame column 4 will open.Along with opening of the contact surface of girder 2 and frame column 4, power consumption member rates such as the angle steel of girder 2 end faces, friction member are introduced into plastic state to realize power consumption.Simultaneously, the longitudinal reinforcement in the floor 5 can be used as the hogging moment usefulness at opposing girder 2 two ends.Floor 5 is along with girder 2 and secondary beam 3 with its fixedly connected prestressed frame are done horizontal movement, and steps up to produce relatively at other and slide, and the concrete frame floor substantially still is in elastic range.After the geological process, secondary beam 3 of fixedlying connected with floor 5 and girder 2 are returned to original vertical center (self-centering) under the effect of steel strand prestress, thereby eliminate the permanent set of concrete frame floor slab structure under geological process, and the distortion of the main element of the concrete frame floor slab structure of being made up of girder 2, secondary beam 3 and frame column 4 can be controlled in the elastic range, and promptly the concrete frame floor slab structure is harmless.
The technical solution used in the present invention has overcome 5 pairs of Frame's Constrain effect problem of floor in the self-centering prestressed concrete frame floor slab structure, reduce (or avoiding) because of 5 pairs of self-centering prestressed concrete frame joints of floor, promptly to the constraint of the node between girder 2 and the frame column 4 and weaken auto-reset function after the shake of self-centering concrete frame, eliminate or reduced the permanent set of structure effectively, reduced the cost that repair the shake back.
Described fastener 6 can have multiple structure.As Fig. 3 and shown in Figure 5, the fastener 6 that the present invention adopts comprises shearing resistance pin 8 and cement mortar screeding layer 9.Cement mortar screeding layer 9 is fixedly connected between secondary beam 3 and the floor 5, perhaps is fixedly connected between girder 2 and the floor 5.Shearing resistance pin 8 passes cement mortar screeding layer 9, and the two ends of shearing resistance pin 8 lay respectively in girder 2 and the floor 5, and perhaps the two ends of shearing resistance pin 8 lay respectively in secondary beam 3 and the floor 5.Like this, girder 2 and the floor 5 that adopts fastener 6 to connect can move together; The secondary beam 3 and the floor 5 that adopt fastener 6 to connect can move together.
Described slide device 7 can have multiple structure.As Fig. 4 and shown in Figure 6, the slide device 7 that the present invention adopts comprises sliding plate 10 and down-shift board 11.Last sliding plate 10 is fixedly connected on the bottom surface of floor 5, and down-shift board 11 is fixedly connected on the end face of girder 2 or secondary beam 3, and the area of down-shift board 11 is less than the area of last sliding plate 10, and last sliding plate 10 covers whole down-shift board 11.Like this, last sliding plate 10 is fixedlyed connected with floor 5, and girder 2 or secondary beam 3 are fixedlyed connected with down-shift board 11.When generation between floor 5 and girder 2 or the secondary beam 3 relatively moves, will produce relative slip between last sliding plate 10 and the down-shift board 11.The area of down-shift board 11 can guarantee that less than the area of last sliding plate 10 down-shift board 11 can produce relative slippage freely with last sliding plate 10.The described thickness sum that goes up sliding plate 10 and down-shift board 11 equals the thickness of cement mortar screeding layer 9.Can guarantee that so the interior floor 5 of whole frame plane is at sustained height.
Slide owing to can produce relatively between last sliding plate 10 and the down-shift board 11, so for reducing friction effect, down-shift board 11 and last sliding plate 10 adopt polytetrafluoroethylmaterial material to make respectively.Like this, down-shift board 11 more is easy to generate relative slip with last sliding plate 10.
Claims (5)
1. self-centering prestressed concrete frame floor slab structure, this concrete frame floor slab structure comprises stride (1) of N horizontal arrangement, N is the integer greater than 1, each is striden (1) and comprises four girders (2), M root secondary beam (3), M is the integer greater than 1, four frame columns (4) and floor (5), girder (2) is connected between adjacent two frame columns (4) by prestress wire, girder (2) and frame column (4) are formed rectangular frame, secondary beam (3) is connected between relative two girders (2), and floor (5) is positioned at the top of girder (2) and secondary beam (3); Adjacent (a 1) shared girder (2) and two frame columns (4) of striding, it is characterized in that, at a described N span centre of striding (1), secondary beam (3), and two girders (2) that are connected with secondary beam (3) are fixedlyed connected with floor (5) by fastener (6) respectively, all the other two girders (2) are connected with floor (5) by slide device (7), and these two girders (2) can slide by slide device (7) relatively with floor (5); At each span centre of remainder, girder (2) is connected with floor (5) by slide device (7) respectively with secondary beam (3), and girder (2) can slide with floor (5) by slide device (7) respectively relatively with secondary beam (3).
2. according to the described self-centering prestressed concrete frame floor slab structure of claim 1, it is characterized in that, described fastener (6) comprises shearing resistance pin (8) and cement mortar screeding layer (9), cement mortar screeding layer (9) is fixedly connected between secondary beam (3) and the floor (5), perhaps is fixedly connected between girder (2) and the floor (5); Shearing resistance pin (8) passes cement mortar screeding layer (9), and the two ends of shearing resistance pin (8) lay respectively in girder (2) and the floor (5), and perhaps the two ends of shearing resistance pin (8) lay respectively in secondary beam (3) and the floor (5).
3. according to claim 1 or 2 described self-centering prestressed concrete frame floor slab structures, it is characterized in that, described slide device (7) comprises sliding plate (10) and down-shift board (11), last sliding plate (10) is fixedly connected on the bottom surface of floor (5), down-shift board (11) is fixedly connected on the end face of girder (2) or secondary beam (3), and the area of down-shift board (11) is less than the area of last sliding plate (10), and last sliding plate (10) covers whole down-shift board (11).
4. according to the described self-centering prestressed concrete frame floor slab structure of claim 3, it is characterized in that the described thickness sum that goes up sliding plate (10) and down-shift board (11) equals the thickness of cement mortar screeding layer (9).
5. according to the described self-centering prestressed concrete frame floor slab structure of claim 3, it is characterized in that described down-shift board (11) and last sliding plate (10) adopt polytetrafluoroethylmaterial material to make respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110430239 CN102425257B (en) | 2011-12-21 | 2011-12-21 | Self-centering pre-stressed concrete framework floor slab structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110430239 CN102425257B (en) | 2011-12-21 | 2011-12-21 | Self-centering pre-stressed concrete framework floor slab structure |
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| CN102425257A CN102425257A (en) | 2012-04-25 |
| CN102425257B true CN102425257B (en) | 2013-07-31 |
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| CN107012948A (en) * | 2017-04-18 | 2017-08-04 | 武汉志和岩土工程有限公司 | A kind of basement floor building structural and its construction method |
Citations (4)
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|---|---|---|---|---|
| US5735100A (en) * | 1996-10-07 | 1998-04-07 | 527233 B.C. Ltd. | Folding telescopic prefabricated framing units for non-load-bearing walls |
| CN101761160A (en) * | 2009-12-18 | 2010-06-30 | 东南大学 | Totally-prefabricated assembling type reinforced concrete floor system |
| CN201883584U (en) * | 2010-12-23 | 2011-06-29 | 辽宁际洲环保节能建材有限公司 | Light energy-saving floor |
| CN202390978U (en) * | 2011-12-21 | 2012-08-22 | 东南大学 | Self-centering prestressed concrete frame floor slab structure |
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- 2011-12-21 CN CN 201110430239 patent/CN102425257B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5735100A (en) * | 1996-10-07 | 1998-04-07 | 527233 B.C. Ltd. | Folding telescopic prefabricated framing units for non-load-bearing walls |
| CN1232518A (en) * | 1996-10-07 | 1999-10-20 | 球球钢铁革新公司 | Folding telescopic prefabricated framing units for non-load-bearing walls |
| CN101761160A (en) * | 2009-12-18 | 2010-06-30 | 东南大学 | Totally-prefabricated assembling type reinforced concrete floor system |
| CN201883584U (en) * | 2010-12-23 | 2011-06-29 | 辽宁际洲环保节能建材有限公司 | Light energy-saving floor |
| CN202390978U (en) * | 2011-12-21 | 2012-08-22 | 东南大学 | Self-centering prestressed concrete frame floor slab structure |
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Application publication date: 20120425 Assignee: ARCHITECTS & ENGINEERS CO., LTD. OF SOUTHEAST University Assignor: SOUTHEAST University Contract record no.: X2020980010306 Denomination of invention: A self centering prestressed concrete frame floor structure Granted publication date: 20130731 License type: Common License Record date: 20201230 |