CN106284684B - The node and joint connecting method that coupling beam local widening and shear wall locally thicken - Google Patents
The node and joint connecting method that coupling beam local widening and shear wall locally thicken Download PDFInfo
- Publication number
- CN106284684B CN106284684B CN201610895564.5A CN201610895564A CN106284684B CN 106284684 B CN106284684 B CN 106284684B CN 201610895564 A CN201610895564 A CN 201610895564A CN 106284684 B CN106284684 B CN 106284684B
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- coupling beam
- shear wall
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- local widening
- node
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- 230000008878 coupling Effects 0.000 title claims abstract description 97
- 238000010168 coupling process Methods 0.000 title claims abstract description 97
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008719 thickening Effects 0.000 claims abstract description 11
- 238000003032 molecular docking Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 8
- 238000005336 cracking Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 5
- 238000012407 engineering method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4157—Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B2001/4192—Connecting devices specially adapted for embedding in concrete or masonry attached to concrete reinforcing elements, e.g. rods or wires
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The problem of node and joint connecting method that coupling beam local widening and shear wall locally thicken, the connection to solve existing prefabricated assembled shear wall and coupling beam node use cast-in-place method, cause concrete wet construction amount big, be easy to happen cracking, and construction quality is difficult to ensure.Node：Region being docked with coupling beam in shear wall and shear wall part thickened area and coupling beam local widening area being respectively set, prestressing force bolt of long stem is anchored at high-strength nut on anchor slab behind shear wall part thickened area and coupling beam local widening area.Joint connecting method：One, local widening is carried out to coupling beam end, local thickening is carried out to shear wall, forms coupling beam local widening area and shear wall part thickened area；Two, prestressing force bolt of long stem is passed through into bolt hole, tensioning then is carried out to prestressing force bolt of long stem；Three, prestressing force bolt of long stem is anchored on anchor slab with high-strength nut, that is, forms the bolt of long stem connecting node that coupling beam local widening and shear wall locally thicken.The present invention is connect for coupling beam with shear wall.
Description
Technical field
The present invention relates to prefabricated assembled shear wall in a kind of frame shear wall structure and coupling beam node and node connection sides
Method, and in particular to the node and joint connecting method that a kind of coupling beam local widening and shear wall locally thicken.
Background technology
Frame-Shear Wall (frame is cut) structure applies in general to the skyscraper of 50m~150m.In assembled frame-shear structure,
Since the coupling beam thickness of Shear Wall in Frame-Shear Wall Structures is smaller, reinforcing bar is placed with thick, not enough area of section with shear wall and connected
It connects and uses sleeve, simultaneously because frame-shear structure center is set a roof beam in place, the presence of frame column and shear wall, the assembly space ten of Shear-wall Connecting Beam Used
It is point limited, therefore suitable for frame beam column and the sleeve connection method of Liang Liang connections, connect with shear wall suitable for Vierendeel girder
Joint bar connection method, the sleeve connection method etc. suitable for levels shear wall and shear wall connection cannot all be realized pre- well
The connection of fabricated shear wall processed and coupling beam node.
So far, the assembled connection structure and connection method of prefabricated assembled shear wall in frame-shear structure and coupling beam are compared
Few, the coupling beam of concrete Shear Wall in Frame-Shear Wall Structures is mainly built by cast-in-place engineering method.Cast-in-place engineering method, the wet work of concrete
Industry amount is big, the construction period is long, node is easy to crack, and construction quality is difficult to ensure, position of joints is easily made to become weak link.
Invention content
The present invention is to solve the connection of existing prefabricated assembled shear wall and coupling beam node using cast-in-place method, leads to concrete
Wet construction amount is big, is easy to happen cracking, and construction quality is difficult to ensure, so that position of joints is become weak link, and long in time limit
A kind of problem, it is proposed that the bolt of long stem joint connecting method that coupling beam local widening and shear wall locally thicken.
The node that locally thickeies of coupling beam local widening and shear wall of the present invention, composition include shear wall, coupling beam, four
Anchor slab, multiple prestressing force bolt of long stem and multiple high-strength nuts dock the both sides setting shear wall in region in shear wall with coupling beam
Local thickened area, the both sides setting coupling beam local widening area in coupling beam Yu shear wall butt end, after shear wall is docked with coupling beam
Anchor slab, multiple prestressing force stock spiral shells are respectively set in the outer end face in coupling beam local widening area and the outer end face of shear wall part thickened area
Bolt is anchored at high-strength nut on anchor slab behind shear wall part thickened area and coupling beam local widening area.
The joint connecting method that the coupling beam local widening and shear wall of the present invention locally thickeies, its step are as follows：
Step 1: precast shear wall and coupling beam：Local widening is carried out to the end both sides of coupling beam and forms coupling beam local widening
Area, the both sides progress part thickening for docking region with coupling beam to shear wall form shear wall part thickened area, coupling beam local widening
The section length of widening in area is 100mm~500mm, and area's height of widening in coupling beam local widening area is 300mm~500mm, shear wall
The thickening section length of local thickened area is 100mm~500mm, the thickened area height of shear wall part thickened area be 300mm~
500mm reserves multiple bolts hole, adjacent two bolt hole along longitudinal direction in coupling beam local widening area and shear wall part thickened area
Between centre-to-centre spacing be not less than 50mm, distance of the bolt bore edges away from concrete edge be not less than 30mm；
Step 2: stretch-draw prestressing force bolt of long stem：Prestressing force bolt of long stem is passed through into bolt hole, then to prestressing force stock
Bolt carries out tensioning；
Step 3: obtaining the bolt of long stem connecting node that coupling beam local widening and shear wall locally thicken：Reach design to want
After the stretching force asked, prestressing force bolt of long stem is anchored on anchor slab with high-strength nut, that is, forms coupling beam local widening and shearing
The bolt of long stem connecting node that wall locally thickeies.
The present invention has the advantages that compared with prior art：
One, due to the present invention shear wall dock with coupling beam region be additionally arranged shear wall part thickened area and coupling beam locally plus
Wide area so that shear wall and rigidity at coupling beam node are big, and deformation is small, it is not easy to crack, shorten the duration.
Two, method of the invention makes the connection of shear wall and coupling beam more solid and reliable, is carried compared to cast-in-place method bearing capacity
High by 50% or more, the application for fabricated shear wall and coupling beam node provides technical support.
Three, method of the invention construction is convenient, speed of application is fast, construction quality is easily guaranteed that.
Four, present invention shear wall prefabricated assembled suitable for frame shear wall structure is connected with the node of coupling beam.
Description of the drawings
Fig. 1 is the overall structure stereogram of the present invention；
Fig. 2 is the rearview of Fig. 1；
Fig. 3 is the connection relation stereogram of anchor slab 5, prestressing force bolt of long stem 3 and high-strength nut 4.
Specific implementation mode
Specific implementation mode one：Illustrate that present embodiment, present embodiment include shear wall A, coupling beam in conjunction with Fig. 1~Fig. 3
B, four anchor slabs 5, multiple prestressing force bolt of long stem 3 and multiple high-strength nuts 4, the both sides in region are docked in shear wall A with coupling beam B
Shear wall part thickened area 1 is set, the both sides setting coupling beam local widening area 2 in coupling beam B Yu the butt ends shear wall A, shear wall A
Anchor slab is respectively set in the outer end face in the coupling beam local widening area 2 after being docked with coupling beam B and the outer end face of shear wall part thickened area 1
5, multiple prestressing force bolt of long stem 3 are anchored with behind coupling beam local widening area 2 with high-strength nut 4 through shear wall part thickened area 1
On anchor slab 5.
Specific implementation mode two：Illustrate that present embodiment, the shear wall of present embodiment locally thicken in conjunction with Fig. 1 and Fig. 2
The thickened area thickness S1 in area 1 and coupling beam local widening area 2 to widen sector width S2 equal.Other compositions and connection relation with it is specific
Embodiment one is identical.
Specific implementation mode three：Illustrate that present embodiment, the shear wall of present embodiment locally thicken in conjunction with Fig. 1 and Fig. 2
The thickened area height W1 in area 1 and coupling beam local widening area 2 to widen area height W2 equal.Other compositions and connection relation with it is specific
Embodiment one or two is identical.
Specific implementation mode four：Illustrate that present embodiment, the shear wall of present embodiment locally thicken in conjunction with Fig. 1 and Fig. 2
The thickening section length L1 in area 1 and coupling beam local widening area 2 to widen section length L2 equal.Other compositions and connection relation with it is specific
Embodiment three is identical.
Specific implementation mode five：Illustrate present embodiment, present embodiment and specific implementation mode four in conjunction with Fig. 1 and Fig. 2
The difference is that it further includes multiple stirrups 6, multiple stirrups 6 are uniformly arranged on the upper surface in coupling beam local widening area 2.Stirrup 6
Effect for resisting shear stress.Other compositions and connection relation are identical as specific implementation mode four.
Specific implementation mode six：Illustrate present embodiment in conjunction with Fig. 1~Fig. 3, present embodiment is through the following steps that reality
Existing：
Step 1: precast shear wall A and coupling beam B：Local widening formation coupling beam is carried out to the end both sides of coupling beam B locally to add
Wide area 2, the both sides progress part thickening for docking region with coupling beam B to shear wall A form shear wall part thickened area 1, coupling beam office
Portion widen area 2 widen section length L2 be 100mm~500mm, coupling beam local widening area 2 widen area height W2 be 300mm~
The thickening section length L1 of 500mm, shear wall part thickened area 1 are 100mm~500mm, the thickened area of shear wall part thickened area 1
Height W1 is 300mm~500mm, and the specific length of coupling beam local widening area 2 and shear wall part thickened area 1 is wanted according to shearing resistance
Determining, width is asked to be determined according to the requirement that office presses, it is pre- along longitudinal direction in coupling beam local widening area 2 and shear wall part thickened area 1
Reserve multiple bolts hole, the quantity of bolt hole according to less and strong principle determines, the centre-to-centre spacing between adjacent two bolt hole is not
Less than 50mm, distance of the bolt bore edges away from concrete edge is not less than 30mm；
Step 2: stretch-draw prestressing force bolt of long stem 3：Prestressing force bolt of long stem 3 is passed through into bolt hole, it is then long to prestressing force
Bar bolt 3 carries out tensioning, and prestressed size is required according to the control of tensile bearing capacity, shear-carrying capacity and fracture at node
To determine；
Step 3: obtaining the bolt of long stem connecting node that coupling beam local widening and shear wall locally thicken：Reach design to want
After the stretching force asked, prestressing force bolt of long stem 3 is anchored on anchor slab 5 with high-strength nut 4, that is, form coupling beam local widening and is cut
The bolt of long stem connecting node that power wall locally thickeies.
Specific implementation mode seven：Illustrate that present embodiment, present embodiment are coupling beam offices in step 1 in conjunction with Fig. 1 and Fig. 2
The section length L2 that widens that area 2 is widened in portion is 300mm, and the area height W2 that widens in coupling beam local widening area 2 is 400mm.Other steps
It is identical as specific implementation mode six.
Specific implementation mode eight：Illustrate that present embodiment, present embodiment are shear walls in step 1 in conjunction with Fig. 1 and Fig. 2
The thickening section length L1 of local thickened area 1 is 300mm, and the thickened area height W1 of shear wall part thickened area 1 is 400mm.It is other
Step is identical as specific implementation mode six or seven.
Claims (8)
1. the node that a kind of coupling beam local widening and shear wall locally thicken, it is characterised in that：The node includes shear wall
(A), coupling beam (B), four anchor slabs (5), multiple prestressing force bolt of long stem (3) and multiple high-strength nuts (4), shear wall (A) with
Coupling beam (B) docks both sides setting shear wall part thickened area (1) in region, in the both sides of coupling beam (B) and the butt end shear wall (A)
Be arranged coupling beam local widening area (2), shear wall (A) docked with coupling beam (B) after coupling beam local widening area (2) outer end face and cut
Anchor slab (5) is respectively set in the outer end face of power wall part thickened area (1), and multiple prestressing force bolt of long stem (3) are through shear wall part
Thickened area (1) is anchored at high-strength nut (4) on anchor slab (5) afterwards with coupling beam local widening area (2).
2. the node that coupling beam local widening according to claim 1 and shear wall locally thicken, it is characterised in that：It is described to cut
The thickened area thickness (S1) of power wall part thickened area (1) and coupling beam local widening area (2) to widen sector width (S2) equal.
3. the node that coupling beam local widening according to claim 1 or 2 and shear wall locally thicken, it is characterised in that：Institute
State the thickened area height (W1) of shear wall part thickened area (1) and coupling beam local widening area (2) to widen area's height (W2) equal.
4. the node that coupling beam local widening according to claim 3 and shear wall locally thicken, it is characterised in that：It is described to cut
The thickening section length (L1) of power wall part thickened area (1) and coupling beam local widening area (2) to widen section length (L2) equal.
5. the node that coupling beam local widening according to claim 4 and shear wall locally thicken, it is characterised in that：The section
Point further includes multiple stirrups (6), and multiple stirrups (6) are uniformly arranged on the upper surface in coupling beam local widening area (2).
6. a kind of node that coupling beam local widening and shear wall using claim 1 locally thickeies realize coupling beam local widening and
The joint connecting method that shear wall locally thickeies, it is characterised in that：The method through the following steps that realize：
Step 1: precast shear wall (A) and coupling beam (B)：Local widening is carried out to the end both sides of coupling beam (B) and forms coupling beam part
Widen area (2), the both sides progress part thickening for docking region with coupling beam (B) to shear wall (A) forms shear wall part thickened area
(1), the section length (L2) of widening of coupling beam local widening area (2) is 100mm~500mm, and area is widened in coupling beam local widening area (2)
Highly (W2) is 300mm~500mm, and the thickening section length (L1) of shear wall part thickened area (1) is 100mm~500mm, shearing
The thickened area height (W1) of wall part thickened area (1) is 300mm~500mm, in coupling beam local widening area (2) and shear wall part
Multiple bolts hole are reserved on thickened area (1) along longitudinal direction, the centre-to-centre spacing between adjacent two bolt hole is not less than 50mm, bolt hole edge
Distance of the edge away from concrete edge is not less than 30mm；
Step 2: stretch-draw prestressing force bolt of long stem (3)：Prestressing force bolt of long stem (3) is passed through into bolt hole, it is then long to prestressing force
Bar bolt (3) carries out tensioning；
Step 3: obtaining the bolt of long stem connecting node that coupling beam local widening and shear wall locally thicken：Reach design requirement
After stretching force, prestressing force bolt of long stem (3) is anchored on anchor slab (5) with high-strength nut (4), that is, formed coupling beam local widening and
The bolt of long stem connecting node that shear wall locally thickeies.
7. the joint connecting method that coupling beam local widening according to claim 6 and shear wall locally thicken, feature exist
In：The section length (L2) of widening in coupling beam local widening area (2) is 300mm in the step 1, and coupling beam local widening area (2) adds
Wide area's height (W2) is 400mm.
8. the joint connecting method that the coupling beam local widening and shear wall described according to claim 6 or 7 locally thicken, feature
It is：The thickening section length (L1) of shear wall part thickened area (1) is 300mm, shear wall part thickened area in the step 1
(1) thickened area height (W1) is 400mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610895564.5A CN106284684B (en) | 2016-10-13 | 2016-10-13 | The node and joint connecting method that coupling beam local widening and shear wall locally thicken |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610895564.5A CN106284684B (en) | 2016-10-13 | 2016-10-13 | The node and joint connecting method that coupling beam local widening and shear wall locally thicken |
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| Publication Number | Publication Date |
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| CN106284684A CN106284684A (en) | 2017-01-04 |
| CN106284684B true CN106284684B (en) | 2018-09-07 |
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| CN201610895564.5A Active CN106284684B (en) | 2016-10-13 | 2016-10-13 | The node and joint connecting method that coupling beam local widening and shear wall locally thicken |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| PL239479B1 (en) * | 2018-10-04 | 2021-12-06 | F B I Tasbud Spolka Akcyjna | Joint for prefabricated abrasive elements |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603536A (en) * | 2004-10-28 | 2005-04-06 | 湖南大学 | Round steel pipe concrete column joint for beam column connection and method for manufacturing the same |
| KR20100066692A (en) * | 2008-12-10 | 2010-06-18 | 지에스건설 주식회사 | Psc beam connection method for continuous bridge using plat anchorage apparatus |
| ES2387852A1 (en) * | 2010-12-22 | 2012-10-02 | Imat Centre Tecnològic De La Construcció | Armed beam with round road intended to be joined by screwing to a pillar, unión system of said beam with a pillar, and provided structure of said system. (Machine-translation by Google Translate, not legally binding) |
| CN102979319A (en) * | 2012-12-27 | 2013-03-20 | 中冶建筑研究总院有限公司 | Method for reinforcing frame node |
| KR20160035135A (en) * | 2014-09-22 | 2016-03-31 | 경희대학교 산학협력단 | the self positioning joint structure between precast steel-concrete composite column and precast steel-concrete composite beam |
| CN205530708U (en) * | 2016-01-28 | 2016-08-31 | 中国建筑东北设计研究院有限公司 | Steel -pipe column and girder steel connected node that thickening mode in edge of a wing is strengthened |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001303666A (en) * | 2000-04-24 | 2001-10-31 | Kajima Corp | Joint section structure between reinforced concrete column and steel frame beam |
-
2016
- 2016-10-13 CN CN201610895564.5A patent/CN106284684B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603536A (en) * | 2004-10-28 | 2005-04-06 | 湖南大学 | Round steel pipe concrete column joint for beam column connection and method for manufacturing the same |
| KR20100066692A (en) * | 2008-12-10 | 2010-06-18 | 지에스건설 주식회사 | Psc beam connection method for continuous bridge using plat anchorage apparatus |
| ES2387852A1 (en) * | 2010-12-22 | 2012-10-02 | Imat Centre Tecnològic De La Construcció | Armed beam with round road intended to be joined by screwing to a pillar, unión system of said beam with a pillar, and provided structure of said system. (Machine-translation by Google Translate, not legally binding) |
| CN102979319A (en) * | 2012-12-27 | 2013-03-20 | 中冶建筑研究总院有限公司 | Method for reinforcing frame node |
| KR20160035135A (en) * | 2014-09-22 | 2016-03-31 | 경희대학교 산학협력단 | the self positioning joint structure between precast steel-concrete composite column and precast steel-concrete composite beam |
| CN205530708U (en) * | 2016-01-28 | 2016-08-31 | 中国建筑东北设计研究院有限公司 | Steel -pipe column and girder steel connected node that thickening mode in edge of a wing is strengthened |
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| CN106284684A (en) | 2017-01-04 |
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