CN104074274A - Connection joint of prefabricated sandwich side fascia - Google Patents
Connection joint of prefabricated sandwich side fascia Download PDFInfo
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- CN104074274A CN104074274A CN201410340657.2A CN201410340657A CN104074274A CN 104074274 A CN104074274 A CN 104074274A CN 201410340657 A CN201410340657 A CN 201410340657A CN 104074274 A CN104074274 A CN 104074274A
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- side fascia
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Abstract
A connection joint of a prefabricated sandwich side fascia comprises the prefabricated sandwich side fascia and a superposed beam, wherein the prefabricated sandwich side fascia is connected with a shear key arranged on a superposed beam cast-in-situ layer through a shear key groove formed in an inner acanthus, a connecting cable is arranged on the bottom of the shear key groove, one end of the connecting cable is embedded in the prefabricated sandwich side fascia, and the other end of the connecting cable penetrates through the bottom of the shear key groove and fixed to the superposed beam cast-in-situ layer; a shear key additional rebar with one end protruding into the shear key groove and the other end extending to the lower portion of a superposed beam erection bar is arranged in the shear key to improve the connecting strength between the side fascia and the superposed beam. According to the connection joint of the prefabricated sandwich side fascia, the prefabricated sandwich side fascia and the superposed beam are connected through multiple points to form a connecting structure characterized in upper hanging and lower flexible limiting, structural strength contribution of the prefabricated sandwich side fascia to a building body is reduced, seismic resistance is improved, a rebar processing and producing die used during prefabricated sandwich side fascia production is simplified, and production efficiency is improved.
Description
Technical field
The present invention relates to technical field of fixed buildings, be specifically related to a kind of connected node of prefabricated sandwich side fascia.
Background technology
In existing assembled architecture, the connected node of prefabricated sandwich side fascia is: on the interior impeller of prefabricated sandwich side fascia, be embedded with an exclusive anchor bar of stretching with superposed beam junction, overhanging anchor bar is " L shaped ", one end is embedded in interior impeller, and the other end stretches out in interior impeller top and is positioned at prefabricated sandwich side fascia plane.When construction, by being connected with the in-situ layer reinforcing bar of superposed beam after the bending of anchor bar external part, by cast-in-situ concrete, overhanging anchor bar is anchored in superposed beam and laminated floor slab, thereby prefabricated sandwich side fascia and superposed beam are linked together.This prefabricated sandwich side fascia is that line is connected with the connected mode of superposed beam, large to the stiffness contribution of major structure of construction, is difficult for dissipation seismic energy when earthquake.When construction, the external part of first overhanging anchor bar must be launched, then be bent to superposed beam in-situ layer.This processing mode of bending again of first launching, easily makes reinforcing bar impaired, and structural strength reduces, operating process complexity, and efficiency of construction is low.Owing to adopting overhanging anchor bar to connect, between the prefabricated sandwich side fascia of upper and lower layer, can only adopt flat mouth to connect, therefore the absolute altitude of prefabricated sandwich side fascia and superposed beam or laminated floor slab remains basically stable, the spillage of easy occurred level direction in the time building in-situ layer concrete, pollutes the outer decorative cover of prefabricated sandwich side fascia.
Summary of the invention
Technical problem to be solved by this invention is: the problems such as, poor seismic behavior large to the contribution of the main building rigidity of structure for the syndeton of the prefabricated sandwich side fascia existing in prior art and superposed beam, construction complexity, and provide a kind of connected node of prefabricated sandwich side fascia, simplify constructing operation, reduce the stiffness contribution of precast wall panel to main building structure, thereby improve structural strength and the anti-seismic performance of building structure main body.
The present invention for the technical scheme that its technical problem of solution adopts is: the connected node of constructing a kind of prefabricated sandwich side fascia, comprise superposed beam and prefabricated sandwich side fascia, it is characterized in that, described superposed beam comprises preformed layer and in-situ layer, in described preformed layer, be provided with the multiple stirrups that extend to described in-situ layer, described prefabricated sandwich side fascia comprises outer impeller successively, insulation layer and interior impeller, described interior impeller connects the side that is arranged on described superposed beam, in described prefabricated sandwich side fascia, impeller is upper in being provided with shearing keyway with described superposed beam in-situ layer junction, on described superposed beam in-situ layer, be provided with the shearing keyway opposite position place of described interior impeller the shear connector matching with described shearing keyway.
In the connected node of prefabricated sandwich side fascia of the present invention, the top surface of described shearing keyway is provided with the drafting angle tilting to described superposed beam in-situ layer top side.
In the connected node of prefabricated sandwich side fascia of the present invention, the cross sectional shape of described shearing keyway in the vertical plane perpendicular to described interior impeller is right-angled trapezium.
In the connected node of prefabricated sandwich side fascia of the present invention, the vertical side of described shearing keyway and/or downside bottom surface are provided with the projection of extending to described shear connector direction.
In the connected node of prefabricated sandwich side fascia of the present invention, in described shearing keyway, vertical side and/or downside bottom surface are provided with the horizontal fin outstanding to described shear connector direction.
In the connected node of prefabricated sandwich side fascia of the present invention, in described shearing keyway, be also provided with connecting strand, described connecting strand comprises pre-buried end and fixed end, the pre-buried end of described connecting strand is embedded in described interior impeller, and described connecting strand fixed end passes downside bottom surface to the described shearing keyway inside of described shearing keyway and extends in described superposed beam in-situ layer and is fixed on bearing rod.Described connecting strand, for flexibly connecting rope or the rope that is rigidly connected, can adopt high strength cable wire to make.For increasing the bonding strength of the pre-buried end of described connecting strand and interior impeller, described interior impeller meta is provided with transverse reinforcement and/or the reinforced mesh of horizontal direction in the below of described shearing keyway, the pre-buried end of described connecting strand is connected with described transverse reinforcement and/or reinforced mesh.
In the connected node of prefabricated sandwich side fascia of the present invention, for strengthening the bonding strength between described shear connector and superposed beam in-situ layer, in described shear connector, be provided with shear connector additional bar, the upper end of described shear connector additional bar extends to the bearing rod bottom of described superposed beam, and described shearing keyway inside is stretched in the lower end of described shear connector additional bar.Build after superposed beam in-situ layer concrete, the lower end of described shear connector additional bar is anchored in shearing keyway, and upper end is anchored in superposed beam in-situ layer.At least one described shear connector additional bar is set in each described shearing keyway.
In the connected node of prefabricated sandwich side fascia of the present invention, also comprise laminated floor slab, described laminated floor slab is erected on the described superposed beam preformed layer with the relative side of described prefabricated sandwich side fascia, by building the in-situ layer concrete of described superposed beam and described laminated floor slab, described prefabricated sandwich side fascia and described superposed beam and described laminated floor slab are connected to entirety.For improving the bonding strength of prefabricated sandwich side fascia and superposed beam and laminated floor slab, the upper end that described shear connector additional bar is preferably set is passed the frame force rib below of described superposed beam and extends to described laminated floor slab in-situ layer.
In the connected node of prefabricated sandwich side fascia of the present invention, for convenience of the processing and fabricating of shearing keyway, preferably pre-buried shearing shearkey box in described shearing keyway, described shearing shearkey box comprises by upper plate, lower shoe and three sidewalls and encloses the box body structure forming.When described shearing shearkey box is pre-buried, its opening surface arranges towards described superposed beam side.Described connecting strand fixed end stretches into inner also extension of described shearing shearkey box through the downside bottom surface of described shearing shearkey box and is fixed to the bearing rod arranging through multiple stirrups in described superposed beam in-situ layer.Easy and not yielding when pre-buried during for guarantee production and processing, shearing shearkey box adopts metal material to make.
Implement the connected node of prefabricated sandwich side fascia of the present invention, there is following beneficial effect: by multiple shearing keyways are set on interior impeller, the multiple shear connectors that match with described shearing keyway are set on superposed beam in-situ layer, can utilize the concrete compressive property of shear connector to bear side fascia deadweight, utilize the concrete anti-seismic performance of multiple shear connectors to bear side fascia seismic load in the horizontal direction; In this connected node, between side fascia and superposed beam, be connected for multiple points, form side fascia upper suspension formula, the spacing flexible connecting structure of lower flat, reduce side fascia to superposed beam stiffness effect, improved structural strength and the anti-seismic performance of main structure body.By drafting angle being set in shearing keyway top surface, avoid cast-in-situ concrete shear connector to produce air owing to shrinking with interior impeller contact position, avoid shear connector internal cause to have air and form cavity; The vertical side of shearing keyway arranges projection, has strengthened the bonding strength of cast-in-place shear connector and shearing keyway, the plane load of opposing side fascia.The connecting strand that one end is anchored in side fascia by arranging, the other end is fixed on superposed beam in-situ layer, when shear connector in earthquake or other situations destroyed, can utilize the tensile property of connecting strand to bear side fascia plane external load, avoid certain one deck side fascia to collapse causing lower floor's side fascia load-bearing and cause collapsing continuously; When earthquake, flexibly connect rope and be connected with being connected to of superposed beam is non-rigid, can also consume a part of earthquake energy.By shear connector additional bar is set, strengthen the tensile strength between shear connector and superposed beam in-situ layer; Shear connector additional bar only needs to place at the construction field (site), very convenient.By pre-buried shearing shearkey box in shearing keyway, facilitate the making processing of shearing keyway.Adopt the connected node of the prefabricated sandwich side fascia in this programme, compared with the overhanging anchor bar of available technology adopting, connection that can upper and lower layer side fascia is connected and is set to tongue and groove and connects by flat mouth, the spillage of horizontal direction while avoiding building in-situ layer concrete; And reduce on-the-spot reinforcing bar processing, simplify constructing operation, improve efficiency of construction.
Brief description of the drawings
Fig. 1 is the cross-sectional view of the embodiment of the present invention one;
Fig. 2 is the cross-sectional view of the embodiment of the present invention two;
Fig. 3 is the cross-sectional view of the embodiment of the present invention three
Fig. 4 is the perspective view of the shearing shearkey box with connecting strand in the present invention.
Fig. 5 is the perspective view of the another kind of embodiment of shearing shearkey box in Fig. 4.
In figure, the prefabricated sandwich side fascia of 1-, the outer impeller of 11-, 12-insulation layer, impeller in 13-, 14-transverse reinforcement, the fire-retardant connector of 15-; 2-superposed beam, 21-superposed beam preformed layer, 21a-stirrup, 22-superposed beam in-situ layer, 22a-frame force rib; 3-laminated floor slab, 31-laminated floor slab preformed layer, 32-laminated floor slab in-situ layer; 4-shearing keyway, 41-shearing shearkey box, 41a-slope, 41b-fin, 41c-short column body, 41d-preformed hole; 5-connecting strand, the pre-buried end of 51-, 52-fixed end; 6-shear connector additional bar, 61-shear connector additional bar upper end, 62-shear connector additional bar lower end; 7-tongue and groove.
Detailed description of the invention
Embodiment mono-is referring to Fig. 1, and the connected node of the prefabricated sandwich side fascia in this embodiment, is assembled at the construction field (site) by prefabricated sandwich side fascia 1 and superposed beam 2.Prefabricated sandwich side fascia 1 comprises outer impeller 11, insulation layer 12 and interior impeller 13.On interior impeller 13, be provided with multiple shearing keyways 4 with superposed beam 2 junctions, the below, the along continuous straight runs that in interior impeller 13, are positioned at shear connector groove 4 are embedded with transverse reinforcement 14.The upper side edge of shearing keyway 4 is along the upper side edge edge lower than insulation layer 12.In the horizontal direction shown in Fig. 1, the thickness of shearing keyway 4 is slightly less than the thickness of interior impeller 13, and the opening surface of shearing keyway 4 is towards superposed beam one side, and shearing keyway 4 has formed a spatial accommodation that opening, other five faces enclose.The upper top side face of shearing keyway 4 arranges the drafting angle tilting to superposed beam in-situ layer top side, on vertical direction as shown in Figure 1, the cross sectional shape of shearing keyway 4 is preferably right-angled trapezium, avoids shear connector cast-in-situ concrete to produce air owing to shrinking with interior impeller contact position.Superposed beam 2 comprises preformed layer 21 and in-situ layer 22, and preformed layer 21 inside are provided with the multiple stirrup 21a that extend to described in-situ layer; Frame force rib 22a is arranged in in-situ layer 22, and is fixedly connected with all stirrup 21a along the long axis direction of superposed beam 2; Superposed beam preformed layer 21 1 sides are near interior impeller 13, and preformed layer 21 upper edges are lower than the lower edge of shearing keyway 4, and the height of in-situ layer 22 is greater than the height of shearing keyway 4.After building superposed beam in-situ layer 22, the cast-in-situ concrete in shearing keyway 4 is shaped to shear connector (see in Fig. 1 shown in the inner concrete of shearing keyway 4), and prefabricated sandwich side fascia 1 and superposed beam 2 are connected to entirety by shear connector.The deadweight that utilizes the concrete compressive property of shear connector to bear prefabricated sandwich side fascia 1, utilizes the concrete anti-seismic performance of shear connector to bear prefabricated sandwich side fascia 1 seismic load in the horizontal direction.In connected node in this preferred embodiment, between prefabricated sandwich side fascia 1 and superposed beam 2, be connected for multiple points, form prefabricated sandwich side fascia 1 upper suspension formula, the spacing flexible connecting structure of lower flat, reduce the impact of prefabricated sandwich side fascia 1 on superposed beam 2 rigidity, improved structural strength and the anti-seismic performance of main structure body.
In order to strengthen the ability that flexibly connects of prefabricated sandwich side fascia 1 and superposed beam 2, in the shearing keyway 4 of interior impeller 13, connecting strand 5 is set.Connecting strand 5 is flexible high strength cable wire, comprises pre-buried end 51 and fixed end 52, and pre-buried end 51 is in advance in internal lobe plate 13 and be fixed on transverse reinforcement 14, and fixed end 52 is through shearing keyway 4 bottoms and be suspended from superposed beam frame force rib 22a.After building superposed beam in-situ layer 22, together with connecting strand fixed end 52 is anchored at superposed beam 2 through frame force rib 22a.By connecting strand 5 is set in shearing keyway 4, when side fascia shear connector in earthquake or other situations destroys, utilize the tensile property of connecting strand 5 to bear the plane external load of prefabricated sandwich side fascia 1; When earthquake, connecting strand 5 is connected with being connected to of superposed beam 2 is non-rigid, can allow prefabricated sandwich side fascia 1 to have a small amount of displacement aspect horizontal, can also consume a part of earthquake energy.
Embodiment bis-is referring to Fig. 2, and the connected node of the prefabricated sandwich side fascia in this embodiment, is assembled at the construction field (site) by prefabricated sandwich side fascia 1, superposed beam 2 and laminated floor slab 3.Wherein laminated floor slab comprises preformed layer 31 and in-situ layer 32, and preformed layer 31 is erected at the top with the superposed beam preformed layer 21 of the relative side of prefabricated sandwich side fascia.In this preferred embodiment, prefabricated sandwich side fascia 1 is connected with the shear connector on superposed beam in-situ layer 22 by the shearing keyway 4 arranging on interior impeller 13 with superposed beam 2, identical with embodiment mono-.From different in embodiment mono-, in shearing keyway 4 in the present embodiment, be also provided with a shear connector additional bar, shear connector additional bar is L shaped, the upper end 61 of shear connector additional bar is passed the frame force rib 22a below of superposed beam 2 and is extended to the in-situ layer 32 of laminated floor slab 3, and shearing keyway 4 inside are stretched in the lower end 62 of shear connector additional bar.Build after the in-situ layer concrete of superposed beam 2 and laminated floor slab 3, the upper end 61 of shear connector additional bar is anchored at laminated floor slab in-situ layer 32, and lower end 62 is anchored in shear connector concrete.Shear connector additional bar and shear connector link together prefabricated sandwich side fascia 1 jointly with superposed beam 2 and laminated floor slab 3, shear connector additional bar can strengthen the tensile strength of the shear connector between prefabricated sandwich side fascia 1 and superposed beam 2 and laminated floor slab 3.
Embodiment tri-is referring to Fig. 3 to Fig. 5, and the connected node of the prefabricated sandwich side fascia in this embodiment, is assembled at the construction field (site) by prefabricated sandwich side fascia 1, superposed beam 2 and laminated floor slab 3.
In Fig. 3, prefabricated sandwich side fascia 1 comprises outer impeller 11, insulation layer 12 and interior impeller 13, adopts fire-retardant connector 15 that outer impeller 11, insulation layer 12 and interior impeller 13 are linked together; On interior impeller 13, be provided with multiple shearing keyways 4 with superposed beam 2 junctions, the below, the along continuous straight runs that in interior impeller 13, are positioned at shear connector groove 4 are embedded with transverse reinforcement 14.The upper end that outer impeller 11 and warming plate 12 are longer than in interior impeller 13 upper ends, interior impeller 13 lower ends are shorter than outer impeller 11 and warming plate 12 lower ends, and tongue and groove 7 overlap joints that the prefabricated sandwich side fascia of upper and lower layer arranges by interior impeller 13 connect.
As shown in Figure 4, the interior pre-buried shearing shearkey box 41 of shearing keyway 4, shearing shearkey box 41 bottoms are provided with connecting strand 5.Shearing shearkey box 41 is the can that an opening, five faces enclose, and its opening surface arranges towards superposed beam in-situ layer 22.The top surface of shearing shearkey box 43 is the slope 41a tilting to superposed beam in-situ layer top side, shearing shearkey box 41 side direction views be shaped as right-angled trapezium.The vertical side vertical with interior impeller 13 is all provided with the fin 41b to box body internal protrusion, and shearing shearkey box 41 downside bottom surfaces remain for the preformed hole 41d through connecting strand 5 in advance.Connecting strand 5 is made after by the doubling of a high strength cable wire, and the pre-buried end 51 that the free end of doubling back tightwire is connecting strand adopts high duty metal cover to tighten, and through the transverse reinforcement 14 in interior impeller 13; The closing end of doubling back tightwire is the fixed end 52 of connecting strand, is closed hoop, and fixed end 51, from the preformed hole 41d of shearing shearkey box bottom surface passes, stretches into the box body inside of shearing shearkey box 41.The fin 41b of shearing shearkey box 41 can also take another equivalent embodiment, and as shown in Figure 5, in shearing shearkey box 41, two vertical sides are all provided with the short column body 41c to box body internal protrusion, and all the other structures are identical with shearing shearkey box in Fig. 4.
When construction, the prefabricated sandwich side fascia 1 of lifting fixed band shearing shearkey box 41 and connecting strand 5; Lifting superposed beam preformed layer, through all connecting strand fixed ends 52, near impeller 13 in prefabricated sandwich side fascia, and makes the upper edge of superposed beam preformed layer 21 lower than the lower edge of shearing shearkey box 41 superposed beam preformed layer 21 1 sides frame force rib 22a; Superposed beam preformed layer 21 opposite sides set up laminated floor slab preformed layer 31, lay the in-situ layer reinforcing bar of laminated floor slab 3; Shear connector additional bar lower end 62 is placed in to shearing shearkey box 41 inside, and the in-situ layer reinforcing bar that is fixed to laminated floor slab 3 is extended through the frame force rib 22a of superposed beam in shear connector additional bar upper end 61; Build the in-situ layer concrete of superposed beam 2 and laminated floor slab 3, in the enclosed space of shearing shearkey box 41, cast-in-situ concrete forms shear connector, and connecting strand fixed end 52 and shear connector additional bar upper end 61 are anchored at cast-in-situ concrete layer.Shear connector, connecting strand and shear connector additional bar are jointly connected to entirety by prefabricated sandwich side fascia and superposed beam and laminated floor slab.
Owing to adopting tongue and groove to connect between upper and lower two-layer prefabricated sandwich side fascia, and laminated floor slab preformed layer upper edge is lower than the lower edge of shearing shearkey box, when construction cast-in-situ concrete, interior impeller has played the effect of vertical formwork, can avoid horizontal direction towards side fascia siphonal lobe plate one side leakage slurry, reduce the waste that pollutes and be in the milk of external wallboard siphonal lobe plate; Owing to there being the obstruction of impeller in lower floor's side fascia, when construction, can reduce falling object from high altitude; And can guardrail be directly installed in interior impeller upper end, simplify the installation of guardrail and remove operation, further shorten the duration.
Claims (10)
1. the connected node of a prefabricated sandwich side fascia, comprise superposed beam and prefabricated sandwich side fascia, it is characterized in that, described superposed beam comprises preformed layer and in-situ layer, in described preformed layer, be provided with the multiple stirrups that extend to described in-situ layer, described prefabricated sandwich side fascia comprises outer impeller successively, insulation layer and interior impeller, described interior impeller connects the side that is arranged on described superposed beam, in described prefabricated sandwich side fascia, impeller is upper in being provided with shearing keyway with described superposed beam in-situ layer junction, on described superposed beam in-situ layer, be provided with the shearing keyway opposite position place of described interior impeller the shear connector matching with described shearing keyway.
2. the connected node of prefabricated sandwich side fascia according to claim 1, is characterized in that, the top surface of described shearing keyway is provided with the drafting angle tilting to described superposed beam in-situ layer top side.
3. the connected node of prefabricated sandwich side fascia according to claim 2, is characterized in that, the cross sectional shape of described shearing keyway in the vertical plane perpendicular to described interior impeller is right-angled trapezium.
4. the connected node of prefabricated sandwich side fascia according to claim 1, is characterized in that, the vertical side of described shearing keyway and/or downside bottom surface are provided with the projection of extending to described shear connector direction.
5. the connected node of prefabricated sandwich side fascia according to claim 1, is characterized in that, in described shearing keyway, vertical side and/or downside bottom surface are provided with the horizontal fin outstanding to described shear connector direction.
6. the connected node of prefabricated sandwich side fascia according to claim 1, it is characterized in that, in described shearing keyway, be also provided with connecting strand, described connecting strand comprises pre-buried end and fixed end, the pre-buried end of described connecting strand is embedded in described interior impeller, and described connecting strand fixed end passes downside bottom surface to the described shearing keyway inside of described shearing keyway and extends in described superposed beam in-situ layer and is fixed on bearing rod.
7. the connected node of prefabricated sandwich side fascia according to claim 6, it is characterized in that, described interior impeller meta is provided with transverse reinforcement and/or the reinforced mesh of horizontal direction in the below of described shearing keyway, the pre-buried end of described connecting strand is connected with described transverse reinforcement and/or reinforced mesh.
8. according to the connected node of claim 1 to 7 arbitrary described prefabricated sandwich side fascia, it is characterized in that, in described shear connector, be provided with shear connector additional bar, the upper end of described shear connector additional bar extends to the bearing rod below of described superposed beam in-situ layer, and the lower end of described shear connector additional bar is stretched in described shearing keyway with described shear connector.
9. the connected node of prefabricated sandwich side fascia according to claim 8, it is characterized in that, also comprise laminated floor slab, on described superposed beam preformed layer, establish laminated floor slab preformed layer with the relative bogie side frame of described prefabricated sandwich side fascia, described shear connector additional bar upper end is passed the frame force rib below of described superposed beam and is extended to the in-situ layer of described laminated floor slab.
10. the connected node of prefabricated sandwich side fascia according to claim 8, it is characterized in that, pre-buried shearing shearkey box in described shearing keyway, described shearing shearkey box comprises the box body structure that opening five faces enclose, the opening surface of described shearing shearkey box arranges towards described superposed beam side.
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| CN201410340657.2A CN104074274B (en) | 2014-07-17 | 2014-07-17 | The connection node of prefabricated sandwich Side fascia |
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| CN106869539A (en) * | 2017-03-23 | 2017-06-20 | 黄河科技学院 | A kind of assembled factory building |
| CN107642194A (en) * | 2017-11-10 | 2018-01-30 | 宁乡远大住宅工业有限公司 | A kind of prefabricated sandwich out-hung panel and its structural system, construction method |
| CN107882269A (en) * | 2017-11-24 | 2018-04-06 | 远大住宅工业（天津）有限公司 | Composite beam and its production method |
| CN110512772A (en) * | 2019-09-26 | 2019-11-29 | 远大住宅工业（天津）有限公司 | The connecting node of out-hung panel and beam |
| CN112554139A (en) * | 2020-11-27 | 2021-03-26 | 中国电建集团成都勘测设计研究院有限公司 | Flexible connection structure for anti-seismic beams in dam of high earth-rock dam |
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| CN112554139A (en) * | 2020-11-27 | 2021-03-26 | 中国电建集团成都勘测设计研究院有限公司 | Flexible connection structure for anti-seismic beams in dam of high earth-rock dam |
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