CN105155683A - Prefabricated beam-column connection in prefabricated concrete buildings and construction method thereof - Google Patents
Prefabricated beam-column connection in prefabricated concrete buildings and construction method thereof Download PDFInfo
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- CN105155683A CN105155683A CN201510492034.1A CN201510492034A CN105155683A CN 105155683 A CN105155683 A CN 105155683A CN 201510492034 A CN201510492034 A CN 201510492034A CN 105155683 A CN105155683 A CN 105155683A
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Abstract
The invention discloses a prefabricated beam-column connection in prefabricated concrete buildings, comprising a prefabricated column, prefabricated beams and a joint connecting member. The prefabricated column is provided with through holes. Beam vertical bars are embedded in the prefabricated beams in advance. The joint connecting member comprises rebars, casings, hoops and cast-in-place concrete. The rebars extend through the through holes to be connected with the beam vertical bars through the casings and are fixed via the hoops. The cast-in-place concrete is poured in a beam-column connection area. A construction method of the prefabricated beam-column connection includes: producing the prefabricated column and the prefabricated beams; lifting the prefabricated column in place, and extending the rebars through the through holes; grouting the through holes; mounting the hoops temporarily on rebars extending out a connection face of a column connecting part; lifting the prefabricated beams in place, and connecting the rebars and the beam vertical bars through the casings; fixing the hoops at intervals to the rebars, casings and beam vertical bars connected with one another; and pouring the cast-in-place concrete. The prefabricated beam-column connection has excellent mechanical properties, is convenient to produce, store, transport and construct and is easy to industrially produce, construction period is shorter, and cost is saved.
Description
Technical field
The present invention relates to Structural Engineering field, be specifically related to precast beam column jointing gusset and construction method thereof in a kind of assembly concrete building.
Background technology
Along with China's sustain economic is fast-developing, Development of China's Urbanization is constantly accelerated, and for realizing town and country construction sustainable development, propose to change town and country construction pattern, promote builing industry transition and upgrade, brute force promotes " industrialization of construction industry " becomes one of top priority.
One of important carrier of industrialization of construction industry is prefabricated concrete structure, and prefabricated beam column link technique is the key technology of prefabricated concrete structure.In conventional fabricated construction, all to concentrate on beam column intersection point core space cast-in-place in the connection of precast beam and prefabricated post, and beam column intersection point core space is stressed complex region, and multiple component handing-over will certainly increase the weight of its complicated performance, affects the globality of frame construction.In addition, also have and beam connecting node is arranged on outside post, the integral prefabricated and less case adopting pre-buried Steel section member to stretch out post limit to be connected with precast beam of post; But the Steel section member in this kind of method of attachment in prefabricated post can affect the connectivity of post reinforcing bar, increase production difficulty; The Steel section member that post limit is stretched out simultaneously can cause cylinder out-of-flatness, thus adds prefabricated post transport and store difficulty.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides precast beam column jointing gusset and construction method thereof in a kind of assembly concrete building, excellent in mechanical performance of the present invention, it is produced, store, transport and construct all simple, cost-saving, shorten the construction period.
Goal of the invention of the present invention is achieved through the following technical solutions:
Precast beam column jointing gusset in a kind of assembly concrete building, comprise prefabricated post, precast beam and connect the node connecting elements of prefabricated post and precast beam, described prefabricated post has post connecting portion, and described post connecting portion axially arranges through hole along precast beam; Described precast beam has beam link, is embedded with beam and indulges muscle in described precast beam, and described beam is indulged muscle one end and stretched out described beam link end face; Described node connecting elements comprises reinforcing bar, sleeve and cast-in-situ concrete, described reinforcing bar passes described through hole and indulges muscle by described sleeve with described beam and is connected, and described cast-in-place concrete filling is between the joint face and the end face of described beam link of described post connecting portion.
Prefabricated post and precast beam are prefabricated in the factory production, arrange the through hole passed for reinforcing bar by designing requirement on the post connecting portion of prefabricated post, and when producing precast beam, pre-buried beam indulges muscle, and beam is indulged muscle one end and stretched out prefabricated beam-ends; Described reinforcing bar, sleeve and cast-in-situ concrete indulge muscle specification according to beam and beam-to-column joint mechanical property demand is chosen.
During assembling construction, by the through hole of rear reinforcing bar in place for lifting prefabricate column through post connecting portion, then in through hole, fill grouting material, reinforcing bar is fixedly connected in prefabricated post; After reinforcing bar is fixing, stirrup is concentrated and is temporarily fixed on reinforcing bar; Again by precast beam hoisted in position, by sleeve, the reinforcing bar stretching out post connecting portion is indulged muscle with the beam stretching out beam link and is connected, and stirrup is fixed on reinforcing bar by designing requirement dispersion, sleeve, beam indulge on muscle; Finally between post connecting portion joint face and beam link end face, build cast-in-situ concrete, form node connecting elements, thus by precast beam and prefabricated post integrated connection.
Beam-column connection is arranged on outside prefabricated post by the present invention, can realize beam column point of intersection prefabricated post integral prefabricated, improve the globality of prefabricated post, makes it possess excellent mechanical property.The through hole passed for reinforcing bar is set in the post connecting portion of prefabricated post, is convenient to the connection between precast beam and prefabricated post, and makes prefabricated post external surface smooth, be convenient to prefabricated post transport, store.By the node connecting elements that reinforcing bar, sleeve and cast-in-situ concrete are formed, realize connecting between prefabricated post and precast beam, because reinforcing bar, sleeve and cast-in-situ concrete can be chosen according to on-the-spot actual demand, so construction flexibility ratio is larger; In addition, above-mentioned beam-column connection structure is simple and easy, easily realizes factory normalization and produces, and is conducive to industrialization of construction industry development, contributes to the reduction of erection time, save construction cost.
Further, through hole and the prefabricated post integral preform of described post connecting portion are shaping, and through hole internal diameter is greater than described bar diameter, and through hole hole wall is coarse, fills grouting material between hole wall and reinforcing bar.In prefabricated post prefabrication process, reserved through hole, is conducive to through hole standardization, industrialization machine-shaping; When being convenient to assembly connection compared with the through hole of large diameter, reinforcing bar passes from through hole, and reinforcing bar, through after through hole, is in the milk to through hole; Comparatively coarse hole wall is conducive to grouting material and is engaged with through hole hole wall, ensures that reinforcing bar is reliably connected with between prefabricated post.
Further, the joint face of described post connecting portion is provided with keyway A, the end face of described beam link is provided with keyway B, the keyway degree of depth is not less than 30mm, ensure that cast-in-situ concrete is reliably connected with between prefabricated post, precast beam with this, thus the bearing capacity of strengthened beam column jointing gusset, the globality of strengthening beam-to-column joint.
Further, described node connecting elements also comprises U-shaped non-dismantling formwork, and described U-shaped non-dismantling formwork is arranged between described post connecting portion and beam link, and described cast-in-place concrete filling is in the U-type groove of described U-shaped non-dismantling formwork.Utilize U-shaped non-dismantling formwork to build cast-in-situ concrete, without the need to on-site consolidation concrete-pouring template, also without the need to removing after having built, thus reducing working procedure, saving human cost.
Further, described U-shaped non-dismantling formwork and described precast beam one-body molded, because U-shaped non-dismantling formwork and precast beam possess identical structure, so improve the globality of connected node, and U-shaped non-dismantling formwork and precast beam one-body molded, the working procedure further reduced, reduction of erection time.
Further, described node connecting elements also comprises stirrup, and described stirrup is fixed on reinforcing bar between described post connecting portion and beam link, sleeve, beam are indulged on muscle.Stirrup and reinforcing bar, beam are indulged together with muscle and are consolidated in cast-in-situ concrete, enhance the shear resistance of beam-column connection, while the mechanical property ensureing beam stake connected node, interconnective reinforcing bar, sleeve and Liang Zong muscle is fixed by stirrup, prevent from because of the effect of concrete extrusion power, interconnective reinforcing bar, sleeve and Liang Zong muscle being deformed during concreting, ensure the stability of beam-to-column joint.
A construction method for precast beam column jointing gusset in assembly concrete building, comprises the following steps:
Step 1: production prefabricated post and precast beam, the post connecting portion in prefabricated post in manufacturing process arranges through hole, and in precast beam, pre-buried beam indulges muscle, and beam indulges the beam link end face that precast beam is stretched out in muscle one end;
Step 2: lifting prefabricate column is in place, by reinforcing bar through through hole, steel bar end stretches out the joint face of post connecting portion;
Step 3: adopt grouting material to be in the milk in through hole;
Step 4, after grouting material solidifies, is installed on stirrup on the reinforcing bar stretching out post connecting portion joint face temporarily;
Step 4: precast beam hoisted in position, indulges muscle by the reinforcing bar stretching out post connecting portion with the beam stretching out beam link by sleeve and is connected;
Step 5: mobile stirrup, is fixed on the reinforcing bar between post connecting portion and beam link, sleeve, beam indulges on muscle by stirrup interval.
Step 6: build cast-in-situ concrete between post connecting portion joint face and beam link end face, forms node connecting elements.
Beam-column connection is arranged at outside prefabricated post by above-mentioned construction method, thus realize post connecting portion and prefabricated post integral prefabricated, improve the globality of prefabricated post, make it possess excellent mechanical property, and prefabricated post external surface is comparatively smooth, is convenient to prefabricated post transport, stores; Fill grouting material in post connecting portion through hole and fix reinforcing bar, and utilize sleeve that the reinforcing bar stretching out post connecting portion joint face is indulged muscle with the beam stretching out beam link end face to be connected, build cast-in-situ concrete at post connecting portion joint face and beam link end face again, thus form the beam-column connection with better globality and stronger supporting capacity; Whole prefabricated post is connected with precast beam, and on-site construction processes is less, and the construction period is shorter, saves construction cost.
Further, above-mentioned steps 1 is produced in the process of precast beam, at the U-shaped non-dismantling formwork of beam link end face integral preform of precast beam, the U-type groove mouth of U-shaped non-dismantling formwork is parallel with precast beam upper surface, U-shaped non-dismantling formwork wide, height can be equal with precast beam, also can according to design requirement reasonable value, U-shaped non-dismantling formwork Design of length is determined according to assembling completion status underbeam link end face and post connecting portion joint face spacing, certain adjusting play should be left, preferred 10mm.U-shaped non-dismantling formwork is set, without the need to on-site consolidation concrete-pouring template, also without the need to removing after having built, thus reduces working procedure, saving human cost.
Further, keyway A is reserved at post connecting portion joint face during production prefabricated post in described step 1, keyway B is reserved at beam link end face when producing precast beam, the keyway degree of depth is not less than 30mm, ensure that cast-in-situ concrete is reliably connected with between prefabricated post, precast beam with this, thus the bearing capacity of strengthened beam column jointing gusset, the globality of strengthening beam-to-column joint.
Beneficial effect of the present invention:
Beam-column connection is arranged on outside prefabricated post by the present invention, post connecting portion can be realized and prefabricated post integral prefabricated, improve the globality of prefabricated post, make it possess excellent mechanical property, and make prefabricated post external surface more smooth, be convenient to prefabricated post transport, store.The node connecting elements that the present invention is consisted of reinforcing bar, sleeve and cast-in-situ concrete, realizes connecting between prefabricated post and precast beam, because reinforcing bar, sleeve and cast-in-situ concrete can be chosen according to on-the-spot actual demand, so construction flexibility ratio is larger; In addition, above-mentioned beam-column connection structure is simple and easy, is easy to realize factory normalization and produces, be conducive to industrialization of construction industry development, contribute to the reduction of erection time, save construction cost.
Accompanying drawing explanation
Accompanying drawing 1 is one embodiment of the present invention structural representation;
Accompanying drawing 2 is the A-A view of accompanying drawing 1;
Accompanying drawing 3 is the front view of U-shaped non-dismantling formwork in accompanying drawing 1.
In figure: 1-prefabricated post, 2-precast beam, 3-node connecting elements, 4-grouting material, 11-post connecting portion, 111-through hole, 112-keyway A, 21-beam link, 211-beam indulges muscle, 212-keyway B, 31-reinforcing bar, 32-sleeve, 33-cast-in-situ concrete, 34-U type non-dismantling formwork, 35-stirrup.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1:
As shown in Figure 1 and Figure 2, precast beam column jointing gusset in a kind of assembly concrete building, comprise prefabricated post 1, precast beam 2 and connect the node connecting elements 3 of prefabricated post 1 and precast beam 2, prefabricated post 1 has post connecting portion 11, post connecting portion 11 is along precast beam 2 axially reserved through hole 111, through hole 111 hole wall is coarse, and post connecting portion 11 joint face arranges keyway A112, precast beam 2 has beam link 21, is embedded with beam and indulges muscle 211 in precast beam 2, and beam is indulged muscle 211 one end and stretched out beam link 21 end face, and beam link 21 end face arranges keyway B212, the U-shaped non-dismantling formwork 34 shaping with precast beam 2 integral preform is had at beam link 21 end face, U-shaped non-dismantling formwork 34 is considered as node connecting elements 3 part and is placed between the joint face of post connecting portion 11 and the end face of described beam link 21, and its U-type groove notch is parallel with precast beam 2 upper surface, node connecting elements 3 also comprises the reinforcing bar 31 that diameter is less than through hole 111 internal diameter, sleeve 32, the stirrup 35 of cast-in-situ concrete 33 and some, reinforcing bar 31 is through through hole 111, grouting material 4 between through hole 111 hole wall and reinforcing bar 31, the reinforcing bar 31 stretching out post connecting portion 11 joint face is indulged muscle 211 by sleeve 32 and the beam stretching out beam link 21 and is connected, stretch out the reinforcing bar 31 of post connecting portion 11 joint face, sleeve 32 and the beam stretching out beam link 21 indulge muscle 211 is all in U-shaped non-dismantling formwork 34 U-type groove in, stirrup 35 is fixedly installed in the reinforcing bar 31 in U-shaped non-dismantling formwork 34, on sleeve 32 and Liang Zong muscle 211, cast-in-situ concrete 33 is built in the U-type groove of U-shaped non-dismantling formwork 34, be connected with the node connecting elements 3 that beam indulges muscle 211 and connect prefabricated post 1 and precast beam 2, formed reliable, effective beam-column connection.
The construction method of above-mentioned beam stake connected node comprises the following steps:
Step 1: at plant produced prefabricated post 1 and precast beam 2, the post connecting portion 11 in prefabricated post 1 in manufacturing process reserves through hole 111 in the mode of built-in metal bellows, and wavy metal bore is greater than reinforcing bar 31 diameter, utilize wedge shape mould to reserve keyway A112 at post connecting portion 11 joint face, the keyway degree of depth is not less than 30mm, in precast beam 2, pre-buried beam indulges muscle 211, beam indulges beam link 21 end face that precast beam 2 is stretched out in muscle 211 one end, beam link 21 end face utilizes wedge shape mould to reserve keyway B212, the keyway degree of depth is not less than 30mm, at the U-shaped non-dismantling formwork 34 of beam link 21 end face integral preform, the U-type groove mouth of U-shaped non-dismantling formwork 34 is parallel with precast beam upper surface, U-shaped non-dismantling formwork 34 wide, height can be equal with precast beam 2, also can according to design requirement reasonable value, U-shaped non-dismantling formwork 34 Design of length is determined according to assembling completion status underbeam link 21 end face and post connecting portion 11 joint face spacing, certain adjusting play should be stayed, preferred 10mm.
Step 2: prefabricated post 1 hoisted in position, by reinforcing bar 31 through through hole 111, the joint face of post connecting portion 11 is stretched out in reinforcing bar 31 termination;
Step 3: adopt grouting material 4 to be in the milk in through hole 111;
Step 4, after grouting material 4 solidifies, is installed on stirrup 35 on the reinforcing bar 31 stretching out post connecting portion 11 joint face temporarily;
Step 4: precast beam 2 hoisted in position, indulges muscle 211 by the reinforcing bar 31 stretching out post connecting portion 11 with the beam stretching out beam link 21 by sleeve 32 and is connected;
Step 5: mobile stirrup 35, and stirrup 35 interval is fixed on reinforcing bar 31 between post connecting portion 11 and beam link 21, sleeve 32, beam indulge on muscle 211.
Step 6: build cast-in-situ concrete 33 in the U-type groove of U-shaped non-dismantling formwork 34, forms node connecting elements 3, by prefabricated post 1 and precast beam 2 integrated connection.
As mentioned above, beam-column connection is arranged at outside prefabricated post by the present invention, thus it is integral prefabricated with prefabricated post 1 to realize post connecting portion 11, improve the globality of prefabricated post 1, make it possess excellent mechanical property, and prefabricated post 1 external surface is smooth, is convenient to prefabricated post transport, stores; Post connecting portion 11 built-in metal bellows is as the passage of reinforcing bar during construction in later period 31, and the comparatively coarse hole wall of metal bellows is conducive to grouting material 4 and is engaged with through hole 111 hole wall, ensures that reinforcing bar 31 is reliably connected with between prefabricated post 1; By sleeve 32, the reinforcing bar 31 stretching out post connecting portion 11 limit junction is indulged muscle 211 with the beam stretching out beam link 21 end face to be connected, and utilize the U-shaped non-dismantling formwork 34 being formed on beam link 21 end face in advance to go along with sb. to guard him the reinforcing bar 31 at beam-to-column joint position, sleeve 32 and Liang Zong muscle 211, in the U-type groove of U-shaped non-dismantling formwork 34, build cast-in-situ concrete 33 again form connecting elements 3 and connect prefabricated post 1 and precast beam 2, thus form reliable and effective beam-column connection, whole work progress, on-site construction processes is few, therefore the duration is shorter, saves construction cost.
In addition, above-mentioned beam-column connection structure is simple and easy, is easy to realize factory normalization and produces, be conducive to the development of industrialization of construction industry, and reinforcing bar 31, sleeve 32 and cast-in-situ concrete 33 can also, according to site operation situation choose reasonable, make site operation have larger flexibility ratio; U-shaped non-dismantling formwork 34 possesses identical structure with precast beam 2, so improve the globality of connected node, U-shaped non-dismantling formwork 34 end and post connecting portion 11 joint face are reserved with 10mm clear distance, make the hoisted in position of precast beam 2 have certain controllability, also can prevent cast-in-situ concrete 33 spillage simultaneously; Stirrup 35 and reinforcing bar 31, sleeve pipe 32, beam are indulged together with muscle 211 and are consolidated in cast-in-situ concrete 33, enhance the shear resistance of beam-column connection, ensure the same amount of the mechanical property of beam stake connected node, fix interconnective reinforcing bar 31, sleeve 32 and Liang Zong muscle 211 by stirrup 35, prevent from because of cast-in-situ concrete 33 extruding force effect, interconnective reinforcing bar 31, sleeve 32 and Liang Zong muscle 211 being deformed during concreting; Post connecting portion 11 joint face and beam link 21 end face arrange keyway A112 and the keyway B212 that the degree of depth is not less than 30mm respectively, further guarantee cast-in-situ concrete 34 is reliably connected with between prefabricated post 1, precast beam 2, thus the bearing capacity of strengthened beam column jointing gusset, the globality of strengthening beam-to-column joint.
As mentioned above, then well the present invention can be realized.
Claims (9)
1. precast beam column jointing gusset in an assembly concrete building, it is characterized in that: comprise prefabricated post (1), precast beam (2) and connect the node connecting elements (3) of prefabricated post (1) and precast beam (2), described prefabricated post (1) has post connecting portion (11), and described post connecting portion (11) axially arranges through hole (111) along precast beam (2); Described precast beam (2) has beam link (21), is embedded with beam and indulges muscle (211) in described precast beam (2), and described beam is indulged muscle (211) one end and stretched out described beam link (21) end face; Described node connecting elements (3) comprises reinforcing bar (31), sleeve (32) and cast-in-situ concrete (33), described reinforcing bar (31) is through described through hole (111) and indulge muscle (211) by described sleeve (32) and described beam and be connected, between the joint face that described cast-in-situ concrete (33) is filled in described post connecting portion (11) and the end face of described beam link (21).
2. precast beam column jointing gusset in assembly concrete building according to claim 1, it is characterized in that: described through hole (111) is shaping with prefabricated post (1) integral preform, through hole (111) internal diameter is greater than described reinforcing bar (31) diameter, through hole (111) hole wall is coarse, fills grouting material (4) between hole wall and reinforcing bar (31).
3. precast beam column jointing gusset in assembly concrete building according to claim 1, it is characterized in that: described node connecting elements (3) also comprises U-shaped non-dismantling formwork (34), described U-shaped non-dismantling formwork (34) is arranged between described post connecting portion (11) and beam link (21), and described cast-in-situ concrete (33) is filled in the U-type groove of described U-shaped non-dismantling formwork (34).
4. precast beam column jointing gusset in assembly concrete building according to claim 2, is characterized in that: described U-shaped non-dismantling formwork (34) is one-body molded with described precast beam (2).
5. precast beam column jointing gusset in the assembly concrete building according to any one of Claims 1 to 4, it is characterized in that: the joint face of described post connecting portion (11) is provided with keyway A(112), the end face of described beam link (21) is provided with keyway B(212).
6. precast beam column jointing gusset in the assembly concrete building according to any one of Claims 1 to 4, it is characterized in that: described node connecting elements (3) also comprises stirrup (35), described stirrup (35) is fixed on reinforcing bar (31) between described post connecting portion (11) and beam link (21), sleeve (32), beam indulge on muscle (211).
7. the construction method of precast beam column jointing gusset in assembly concrete building, is characterized in that, comprise the following steps:
Step 1: production prefabricated post (1) and precast beam (2), post connecting portion (11) in prefabricated post (1) in manufacturing process arranges through hole (111), in precast beam (2), pre-buried beam indulges muscle (211), and beam indulges beam link (21) end face that precast beam (2) is stretched out in muscle (211) one end;
Step 2: prefabricated post (1) hoisted in position, by reinforcing bar (31) through through hole (111), the joint face of post connecting portion (11) is stretched out in reinforcing bar (31) termination;
Step 3: adopt grouting material (4) grouting in through hole (111);
Step 4, after grouting material (4) solidifies, is installed on stirrup (35) temporarily and stretches out on the reinforcing bar (31) of post connecting portion (11) joint face;
Step 4: precast beam (3) hoisted in position, indulges muscle (211) by the reinforcing bar (31) stretching out post connecting portion (11) with the beam stretching out beam link (21) by sleeve (32) and is connected;
Step 5: mobile stirrup (35), and stirrup (35) interval is fixed on reinforcing bar (31) between post connecting portion (11) and beam link (21), sleeve (32), beam indulge on muscle (211).
Step 6: build cast-in-situ concrete (33) between post connecting portion (11) joint face and beam link (21) end face, forms node connecting elements (3).
8. the construction method of precast beam column jointing gusset in assembly concrete building according to claim 7, it is characterized in that: described step 1 is produced in precast beam (2) process, at the U-shaped non-dismantling formwork of beam link (21) the end face integral preform (34) of precast beam (2), the U-type groove mouth of U-shaped non-dismantling formwork (34) is parallel with precast beam upper surface.
9. the construction method of precast beam column jointing gusset in assembly concrete building according to claim 7, it is characterized in that: in described step 1, time production prefabricated post (1), reserve keyway A(112 at post connecting portion (11) joint face), reserve keyway B(212 at beam link (21) end face when producing precast beam (2)).
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