CN100554608C - A kind of ring type steel corbel node of arch without beam connecting reinforcement concrete column - Google Patents
A kind of ring type steel corbel node of arch without beam connecting reinforcement concrete column Download PDFInfo
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- CN100554608C CN100554608C CNB2007100280623A CN200710028062A CN100554608C CN 100554608 C CN100554608 C CN 100554608C CN B2007100280623 A CNB2007100280623 A CN B2007100280623A CN 200710028062 A CN200710028062 A CN 200710028062A CN 100554608 C CN100554608 C CN 100554608C
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Abstract
A kind of ring type steel corbel node of arch without beam connecting reinforcement concrete column, the reinforced concrete post and the arch without beam that comprise the slab-column connections place, and the steel corbel of node place setting, in the thickness range of floor structure, between per two adjacent steel corbels, be provided with on the steel corbel that at least one steel loop spare is fixedly connected on both sides, being harmonious with steel corbel forms the steel loop of at least one circle around reinforced concrete post, wherein has a circle steel loop lock ring pillar at least.Such node structure is owing to have by the steel loop emanant steel corbel of quadrature of blowing out, and inner ring steel loop cuff the reinforced concrete post at node place, and with the steel corbel acting in conjunction, form the stealthy rigidity cap of the cantilever construction of a circle out shape, increase the reliable connection of sheet-pile, improved node bending resistance and shear resistance; When more than one encloses steel loop, can also reduce the amount of deflection of span centre strip effectively.
Description
Affiliated technical field
The present invention relates to the connected node of a kind of arch without beam and post, particularly relate to the ring type steel corbel node of the arch without beam connecting reinforcement concrete column of a kind of flexural strength that can effectively improve node and shear resistance.
Background technology
The main feature of arch without beam is that floor structure directly is bearing on the post, does not establish girder and secondary beam, has the beam superstructure that littler building height is arranged when keeping same headway so have (1), can effectively increase floor height, and is more economical; (2) smooth ceiling, spatial impression is fine, and daylighting, ventilation and sanitary condition are all good than the beam superstructure is arranged; (3) template is simple, can save the template consumption and simplifies advantage such as construction and be used in the architectural design of being everlasting, and particularly often is applied to load-bearing greatly and the demanding engineering of story height.But the design feature of arch without beam has also caused its structural weakness simultaneously, be that arch without beam relies on pillar supporting and load-bearing fully, the stressed superstructure that all concentrates on is positioned at pillar and peripheral zone thereof, this zone is called the slab-column connections district, be similar to a supporting, make that arch without beam one is to be subjected to shearing bigger in the slab-column connections district, easily by the post punching failure, becomes the weak link of floor structure; The 2nd, the span centre zone of floor structure between each pillar is subjected to moment of flexure bigger, so the amount of deflection of superstructure also can be bigger.
In order to improve the stress condition of floor structure, reinforcing prop is to the supporting role of floor structure, generally at the node place that be connected of every floor lid with post, the top that is every floor pillar 2a is provided with cap 2b (referring to Fig. 1), claims column bracket again, as the bearing of floor structure, increase the bearing surface of floor structure and post, avoid floor by the post punching failure, simultaneously it also can reduce span of slab and reduce the moment of flexure of plate, and can increase the rigidity in house.Can also further add cross formula or jing character type steel corbel 3 (shaped steel shear connector) (referring to Fig. 2), to improve the shearing resistance of superstructure at the node place at the node place of arch without beam and pillar 2a.In addition, during the matching board muscle, whole floor structure is divided slab strips on columns A and two kinds of zones of span centre strip B (referring to Fig. 3) at both direction in length and breadth, slab strips on columns is provided with arrangement of reinforcement by the arrangement of reinforcement of beam, makes it become the dark beam of arch without beam.For the node of arch without beam and reinforced concrete post, shown in Fig. 4,5, the plate gluten 11 of superstructure 1 interts in the gap of vertical muscle 21 of the post of reinforced concrete post 2 and stirrup 22 both weave ins, in the middle of the upper and lower plates gluten 11 in slab-column connections district, steel corbel 3 is set, and steel corbel 3 can be indulged muscle 21 and plate gluten 11 welding formation rigid joint framework, external wrapping concretes again by post contacted with it, therefore, it still has the following disadvantages:
(1) shear behavior that lacks the arch without beam slab-column connections of bright beam support still has a little less than the shear behavior of bean column node of beam superstructure;
(2) it is more weak that the slab-column connections bending resistance of arch without beam also has the bean column node of beam superstructure, though be provided with steel corbel (claiming the shaped steel shear connector again), can cut performance to its shearing resistance and anti-impact and increase, but little to the improvement effect of the raising of the anti-bending strength of superstructure and mid-span deflection;
(3) because its bending rigidity has the beam superstructure little, cause the vertical deflection of arch without beam to have the beam superstructure big, amount of deflection is poor, generally reaches 20%;
(4) because above-mentioned defective, cause the irresistible earthquake of arch without beam and the flush shear force and the moment of flexure of the huge post that produces, make the node connecting structure of arch without beam and post that beam building cover board post node fragility be arranged, security performance is relatively poor;
(5) because the fault of construction of above-mentioned arch without beam makes the building of arch without beam be subjected to more restriction, as the restriction of uppermost storey, the building of general arch without beam is the highest must not be above 18 layers.
(6) for the intensity that improves arch without beam often needs to thicken floor structure thickness, this causes on the one hand the expense material to be taken a lot of work, and building costs is obviously increased, and, also can increase the overall weight of superstructure, increase the weight of the load of ground, further increase the construction cost of building.
Summary of the invention
The ring type steel corbel node that the purpose of this invention is to provide a kind of arch without beam connecting reinforcement concrete column, to improve the degree of being connected firmly of arch without beam and reinforced concrete post, improve bending resistance, shear resistance and the rigidity of node simultaneously, thereby strengthen the bearing capacity of the slab-column connections of arch without beam.
Technical scheme of the present invention can realize by following technical measures, a kind ofly be used for the ring type steel corbel node that arch without beam is connected with reinforced concrete post, the reinforced concrete post and the arch without beam that comprise the slab-column connections place, and the steel corbel of node place setting, in the thickness range of floor structure, between per two adjacent steel corbels, be provided with on the steel corbel that at least one steel loop spare is fixedly connected on both sides, be harmonious with steel corbel and form the steel loop of at least one circle around reinforced concrete post, wherein has a circle steel loop lock ring pillar at least, it is characterized in that described steel loop spare adopts shaped steel to make, by vertical ring flat-plate, upper ring plate and lower ring plate constitute, on, the interior ring edge of lower ring plate is separately fixed at the two ends up and down of vertical ring flat-plate, makes, lower ring plate stretches out from the outside level of vertical ring flat-plate, and forming radial section is " the steel loop spare of [" shape.Such node structure is owing to have by the steel loop emanant steel corbel of quadrature of blowing out, and inner ring steel loop cuff the reinforced concrete post at node place, and with the steel corbel acting in conjunction, form the stealthy rigidity cap of the cantilever construction of a circle out shape, increase the reliable connection of sheet-pile, improved node bending resistance and shear resistance; When more than one encloses steel loop, can also reduce the amount of deflection of span centre strip effectively.Through finite element analysis as can be known, in node, described upper ring plate is subjected to tensile stress, described lower ring plate compression chord, and promptly the upper and lower ring flat-plate of steel loop is subjected to flexure stress very big, therefore makes steel loop become the main bending resistance component of node area; In addition, lower ring plate has also born the flush shear force of post, because steel loop wall lock ring pillar, so lower ring plate just is equivalent to the bottom support bracket of slab-column connections has outwards been enlarged, be how many ring flat-plate radial width has, how many cross-sectional areas of node column cap just increased, thereby than using the slab-column connections of steel corbel further to increase shear resistance separately, can reduce the vertical displacement of superstructure effectively.
At least one steel loop spare that is provided with of the present invention is fixedly connected on adjacent two steel corbels, form the steel loop of at least one circle so that be harmonious around reinforced concrete post with steel corbel, one circle or the above steel loop of a circle can be set according to the needs of architectural design, the general steel loop that adopts 1～3 circle, distance between every two adjacent rings steel loop is in 1.5～2.5 times the scope of the dark depth of beam of superstructure, with the flush shear force of corresponding post to slab-column connections, this flush shear force is being that the initial point 45 is (referring to accompanying drawing 4 with the sheet-pile contact generally, α angle among Fig. 9) in the scope, the scope that is provided with of steel loop is greater than or equal to the scope of this flush shear force.Stealthy rigidity cap by the cantilever construction of the formed circle out shape of a few steel loops is big more, and its anti-crawl agentdefiection degree performance is just high more.
The present invention can also do following improvement: the radial width of the upper and lower ring flat-plate on the same steel loop can be identical, also can be inequality.Upper and lower ring flat-plate radial width on same steel loop is not simultaneously, generally be the width of the width of lower ring plate greater than upper ring plate, this is in order to increase the cross-sectional area of node column cap as wide as possible, improve the ability that node shearing resistance and anti-impact are cut, therefore, generally be that the steel loop that is positioned at ring adopts the structure of lower ring plate radial width greater than the radial width of upper ring plate.
In order further to improve the rigidity of shaped steel steel loop, " in [" shape groove deep floor is set at the radial section of steel loop, three limits of described deep floor are welded on respectively on the external surface of the inner surface of last lower ring plate of steel loop and vertical ring flat-plate, make this floor face respectively perpendicular to the steel loop surface of being welded, thereby strengthen the bulk strength and the rigidity of steel loop, further increase bending resistance, the shear resistance of node.
Steel corbel of the present invention can be the punching steel corbel, also can be punching steel corbel not, is good with the punching steel corbel.Steel corbel can be a cross formula structure, also can be the jing character type structure.
The present invention can do following further improvement: the cross or the vertical reinforced steel that extends of well word intersection welding that are positioned at the reinforced concrete post middle part at described steel corbel, this reinforced steel cross sectional shape is " L " shape, stock formula reinforced steel is inserted into the core of reinforced concrete post vertically, wrapped by concrete, make that arch without beam plate and being connected widely of post are strengthened.
Of the present invention can be arbitrarily angled greater than between 0 ° 0～90 ° with the angle between two adjacent steel corbels of angle, and common angle is 90 °; The outline line of described steel loop comprises the interior ring edge and the outer ring edge of vertical ring flat-plate and upper and lower ring flat-plate, preferably is the circle of the respective diameters that forms of round dot with the central axis of reinforced concrete post.
For strengthening the adhesion of ring type bracket node and external wrapping concrete, can be at the bar reinforcement of welding evagination on the webbed side wall of described steel corbel and on the vertical ring flat-plate surface of steel loop, the axial setting of the suitable post of bar reinforcement, and be evenly distributed on the vertical ring flat-plate surface of steel corbel web and steel loop.
Compared with prior art, advantage of the present invention is:
(1) the present invention adopts steel loop to be fixedly connected on the steel corbel in the thickness range of floor structure, be harmonious with steel corbel and form the steel loop wall of at least one circle around reinforced concrete post, the steel loop cuff of inner ring the reinforced concrete post at node place, with the steel corbel acting in conjunction, form the stealthy rigidity cap of the cantilever construction of a circle out shape, both increased the reliable connection of sheet-pile, node bending resistance and shear resistance have been improved again, when more than one encloses the steel loop wall, can also reduce the amount of deflection of span centre strip effectively.
When (2) described steel loop adopts shaped steel to make, because the steel loop wall lock ring pillar of inner ring, its lower ring plate can increase the cross-sectional area of post at the node place effectively, just be equivalent to the bottom support bracket of slab-column connections has outwards been enlarged, its lower ring plate becomes the main member of the flush shear force that bears post, therefore, the present invention has further increased shear resistance than the independent arch without beam slab-column connections of steel corbel of using, and can reduce the vertical displacement of superstructure effectively.
(3) the present invention is provided with the center that axial reinforced steel is inserted into reinforced concrete post in the cross or the well word intersection of punching steel corbel, makes that arch without beam plate and being connected widely of post are strengthened.
(4) in sum, the invention enables the slab-column connections of arch without beam and reinforced concrete post to have and similar bending resistance shear resistance of post and beam structure and integral rigidity, has extremely strong shock resistance, the bearing capacity of node has been strengthened greatly, thereby help making arch without beam to obtain more widely application, even can break the destruction of highrise building in order to defend earthquake to cause of adopting arch without beam, can only build to 18 layers restriction.
(5) because aforesaid advantage, the thickness of the arch without beam that rigidity and intensity are strengthened greatly also can obviously reduce, thickness must reach the arch without beam of 1.2m in the past, can reduce to the thickness of 0.9m, not only the material-saving saving of labor obviously reduces building costs, and, also can reduce the overall weight of superstructure, the heavy burden that alleviates ground, thus further reduce the construction cost of building.
(6) ring type steel corbel node structure of the present invention is hidden in the floor structure, does not need to be provided with cap, and this makes that the ceiling of building is more attractive in appearance, and spatial impression is better.
Description of drawings
Fig. 1 is the simplified schematic diagram that existing arch without beam is provided with cap;
Fig. 2 is the structural perspective (saving superstructure) that existing arch without beam slab-column connections place adds steel corbel;
Fig. 3 is the schematic diagram that existing arch without beam is divided slab strips on columns A and span centre strip B;
Fig. 4 is the structural representation front view of existing arch without beam;
Fig. 5 is that Fig. 2 removes superstructure and the arch without beam slab-column connections structure vertical view that shows;
Fig. 6 is the structural representation front view of embodiments of the invention 1
Fig. 7 is that Fig. 6 removes superstructure and the arch without beam slab-column connections structure vertical view that shows;
Fig. 8 is the structural perspective of embodiments of the invention 1 partly cut-away's superstructure;
Fig. 9 is the structural representation front view of embodiments of the invention 2
Figure 10 is that Figure 10 removes superstructure and the arch without beam slab-column connections structure vertical view that shows;
Figure 11 is the structural perspective of embodiments of the invention 2 partly cut-away's superstructures;
Figure 12 is the structure vertical view of embodiments of the invention 2 slab-column connections ring type steel corbels and arrangement of reinforcement;
Figure 13 is the structural representation front view of embodiments of the invention 3
Figure 14 is that Figure 13 removes superstructure and the arch without beam slab-column connections structure vertical view that shows;
Figure 15 is the structural perspective of embodiments of the invention 3 partly cut-away's superstructures.
The specific embodiment
It is one of specific embodiments of the invention that a kind of shown in Fig. 6～8 is used for the ring type steel corbel node that arch without beam is connected with reinforced concrete post, the reinforced concrete post 2 and the arch without beam 1 that comprise the slab-column connections place, and the steel corbel 3 of node place setting, steel corbel 3 has four, is 90 ° with the angle of 3 of adjacent two steel corbels of angle.Four steel corbels 3 are vertically-displacable not, and intersect the back and form the jing character type structure, be that steel corbel 3 does not pass arch without beam 1, the upper and lower part of arch without beam 1 is equipped with crisscross plate gluten 11, be provided with vertical muscle 21 of post and tie muscle 22 in the steel corbel 3, owing to be vertically-displacable not, vertical muscle 21 along continuous straight runs in stretching into arch without beam 1 of post outwards bends, and is fixed on the arch without beam 1.Steel corbel 3 is positioned at the vertical reinforced steel 6 that extends of well word intersection welding at reinforced concrete post 2 middle parts, the cross sectional shape of this reinforced steel 6 is " L " shape, stock formula reinforced steel 6 is inserted into the core of reinforced concrete post 2 vertically, is wrapped by concrete.In the thickness range of floor structure, between per two adjacent steel corbels 3, be provided with on the steel corbel 3 that a steel loop spare 4 is fixedly connected on both sides, being harmonious with steel corbel 3 forms the steel loop of a circle around reinforced concrete post 2, this steel loop lock ring pillar.Steel loop spare 4 adopts shaped steel to make, constitute by vertical ring flat-plate 43, upper ring plate 41 and lower ring plate 42, the interior ring edge of upper and lower ring flat- plate 41,42 is separately fixed at the two ends up and down of vertical ring flat-plate 43, upper and lower ring flat- plate 41,42 is stretched out from vertical ring flat-plate 43 outside levels, and forming radial section is " the steel loop spare 4 of [" shape.The width of the lower ring plate 42 on the above-mentioned steel loop is greater than the width of upper ring plate 41.The radial section of steel loop " in [" shape groove deep floor 44 is set, three limits of deep floor 44 are welded on respectively on the external surface of the inner surface of upper and lower ring flat- plate 41,42 of steel loop and vertical ring flat-plate 43.The outline line of steel loop comprises the interior ring edge and the outer ring edge of vertical ring flat-plate 43 and upper and lower ring flat- plate 41,42, is that central axis with reinforced concrete post 2 is the circle of the respective diameters that forms of round dot.At the bar reinforcement 5 of welding evagination on the webbed side wall of steel corbel 3 and on vertical ring flat-plate 43 surfaces of steel loop, bar reinforcement 5 is along the axial setting of posts, and is evenly distributed on vertical ring flat-plate 43 surfaces of steel corbel 3 webs and steel loop.
It is two of specific embodiments of the invention that a kind of shown in Fig. 9～12 is used for the ring type steel corbel node that arch without beam is connected with reinforced concrete post, different is with a last embodiment, quantity around the steel loop of reinforced concrete post 2 is two circles, be respectively inside and outside two steel loops, steel loop lock ring pillar in the inner part wherein, and the width of the lower ring plate 42a on this steel loop is greater than the width of upper ring plate 41a; And the radial width of upper and lower ring flat- plate 41b, 42b on the steel loop in the outer part is identical.Distance between the two adjacent rings steel loop is 1.5～2.5 times of the dark depth of beam of superstructure.
It is three of specific embodiments of the invention that a kind of shown in Figure 13,14 is used for the ring type steel corbel node that arch without beam is connected with reinforced concrete post, and different is with a last embodiment, and steel corbel 3 is a vertically-displacable, and promptly steel corbel 3 passes arch without beam 1.Other structure is identical with embodiment 2.
Claims (8)
1. the ring type steel corbel node of an arch without beam connecting reinforcement concrete column, the reinforced concrete post (2) and the arch without beam (1) that comprise the slab-column connections place, and the steel corbel (3) of node place setting, in the thickness range of floor structure, between per two adjacent steel corbels (3), be provided with on the steel corbel (3) that at least one steel loop spare (4) is fixedly connected on both sides, be harmonious with steel corbel (3) and form the steel loop of at least one circle around reinforced concrete post, wherein has a circle steel loop lock ring pillar at least, it is characterized in that described steel loop spare (4) adopts shaped steel to make, by vertical ring flat-plate (43), upper ring plate (41) and lower ring plate (42) constitute, on, lower ring plate (41,42) interior ring edge is separately fixed at the two ends up and down of vertical ring flat-plate (43), make, lower ring plate (41,42) stretch out from the outside level of vertical ring flat-plate (43), forming radial section is " the steel loop spare of [" shape (4).
2. the ring type steel corbel node of a kind of arch without beam connecting reinforcement concrete column according to claim 1, the quantity that it is characterized in that described steel loop around reinforced concrete post (2) (4) is 1～3 circle, and the distance between every two adjacent rings steel loop is 1.5～2.5 times of the dark depth of beam of superstructure.
3. the ring type steel corbel node of a kind of arch without beam connecting reinforcement concrete column according to claim 2 is characterized in that the radial width of the upper and lower ring flat-plate (41,42) on the same steel loop is identical.
4. the ring type steel corbel node of a kind of arch without beam connecting reinforcement concrete column according to claim 2 is characterized in that the width of the width of the lower ring plate (42) on the same steel loop greater than upper ring plate (41).
5. according to the ring type steel corbel node of claim 3 or 4 described a kind of arch without beam connecting reinforcement concrete columns, it is characterized in that described steel loop radial section " deep floor (44) is set in [" shape groove, and three limits of described deep floor (44) are welded on respectively on the external surface of the inner surface of upper and lower ring flat-plate (41,42) of steel loop and vertical ring flat-plate (43).
6. the ring type steel corbel node of a kind of arch without beam connecting reinforcement concrete column according to claim 5 is characterized in that described steel corbel (3) is the punching steel corbel.
7. the ring type steel corbel node of a kind of arch without beam connecting reinforcement concrete column according to claim 6, it is characterized in that described steel corbel (3) is positioned at the cross or the vertical reinforced steel (6) that extends of well word intersection welding at reinforced concrete post (2) middle part, the cross sectional shape of this reinforced steel (6) is " L " shape, stock formula reinforced steel (6) is inserted into the core of reinforced concrete post (2) vertically, is wrapped by concrete.
8. the ring type steel corbel node of a kind of arch without beam connecting reinforcement concrete column according to claim 7 is characterized in that with the angular range between adjacent two steel corbels (3) of angle be greater than between 0 ° 0～90 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100280623A CN100554608C (en) | 2007-05-18 | 2007-05-18 | A kind of ring type steel corbel node of arch without beam connecting reinforcement concrete column |
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| CNB2007100280623A CN100554608C (en) | 2007-05-18 | 2007-05-18 | A kind of ring type steel corbel node of arch without beam connecting reinforcement concrete column |
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| CN100554608C true CN100554608C (en) | 2009-10-28 |
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Families Citing this family (15)
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| CN101503890B (en) * | 2009-02-04 | 2011-05-18 | 南通建筑工程总承包有限公司 | L-shaped connection node of steel reinforced concrete full-prefabricated assembly structural beam |
| CN101812897A (en) * | 2010-04-07 | 2010-08-25 | 湖南大学 | Reinforced concrete variable cross-section column for forming nucleiform node |
| CN102877581A (en) * | 2012-09-07 | 2013-01-16 | 华侨大学 | Built-in steel-type reinforcing no-beam floor system structure |
| CN102864860A (en) * | 2012-09-07 | 2013-01-09 | 华侨大学 | Well-type framed girder reinforced flat slab connecting structure |
| CN105178354B (en) * | 2015-09-06 | 2017-10-13 | 上海建工二建集团有限公司 | One farming word beam column cap and flatslab construction system |
| CN105735541A (en) * | 2016-03-24 | 2016-07-06 | 金天德 | Steel structure girderless floor slab column structure |
| CN107143040B (en) * | 2017-04-25 | 2023-07-18 | 华南理工大学 | Connection structure of prefabricated regenerated block concrete beam and construction method thereof |
| CN107023112A (en) * | 2017-06-01 | 2017-08-08 | 华东建筑设计研究院有限公司 | A kind of Punching Shear column connects node |
| CN107100282A (en) * | 2017-06-05 | 2017-08-29 | 杨大刚 | Cap twin-spar construction system |
| CN107882234A (en) * | 2017-12-11 | 2018-04-06 | 刘祥锦 | A kind of connecting node between the vertical member and floor of plate-column structure |
| CN108589910A (en) * | 2018-06-25 | 2018-09-28 | 浙江大学 | A kind of steel-concrete composite slab rod structure |
| CN109162406A (en) * | 2018-09-29 | 2019-01-08 | 杨大刚 | A kind of assembled bolumn cap |
| CN111549949A (en) * | 2020-05-22 | 2020-08-18 | 浙江大学建筑设计研究院有限公司 | Well word steel pipe reinforcement does not have roof beam superstructure structure |
| CN113216519B (en) * | 2021-05-06 | 2022-04-22 | 浙江大学 | Steel reinforcement framework and application thereof in floor slab, flat slab and pile foundation bearing platform |
| CN118461818A (en) * | 2024-06-07 | 2024-08-09 | 长沙理工大学 | Prefabricated ultra-high performance concrete member for improving impact-resistant and shear-resistant bearing capacity and construction method |
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Address after: No.97 Liuhua Road, Liwan District, Guangzhou City, Guangdong Province 510010 Patentee after: Guangdong Architectural Design and Research Institute Co., Ltd Address before: Guangzhou City, Guangdong province 510010 Liuhua Road No. 97 Patentee before: ARCHITECTURAL DESIGN Research Institute OF GUANGDONG PROVINCE |