CN108589916A - A kind of precast prestressed assembled dry type node and assembly method - Google Patents
A kind of precast prestressed assembled dry type node and assembly method Download PDFInfo
- Publication number
- CN108589916A CN108589916A CN201810471334.5A CN201810471334A CN108589916A CN 108589916 A CN108589916 A CN 108589916A CN 201810471334 A CN201810471334 A CN 201810471334A CN 108589916 A CN108589916 A CN 108589916A
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- Prior art keywords
- steel
- continuous beam
- dry type
- plate
- steel slab
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Classifications
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- 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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
-
- 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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/22—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material with parts being prestressed
Abstract
The invention discloses a kind of precast prestressed assembly concrete continuous beam dry type connecting nodes, can be used in the structures such as prefabricated concrete structure, belong to Architectural Structure Design technical field.It is characterized in that providing a kind of precast prestressed assembly concrete continuous beam dry type connecting node, the integrated application of prestressing technique and assembled dry type node technology is realized；Prestress wire uses un-bonded prestressed steel strand, and the construction of presstressed reinforcing steel is carried out using post stretching；Using being welded to connect between steel deck-plate and pre-embedded steel slab, to ensure that the weld seam of steel deck-plate and pre-embedded steel slab can resist tensile stress enough, design weld seam yield strength is 2 times of continuous beam span centre longitudinal tensile regular reinforcement yield strength.This novel fabricated node not only has durability outstanding and economy, while more economizing on resources and the energy, meets the requirement of sustainable development compared with widely applied cast-in-place node.The present invention also provides the assembly methods of this assembling type node simultaneously.
Description
Technical field
The present invention relates to a kind of dry type connecting nodes suitable for precast prestressed assembly concrete continuous beam, can be used for
In the structures such as prefabricated concrete structure, belong to Architectural Structure Design technical field.
Background technology
Prefabrication is a kind of mode of construction of achievable resource rational utilization and environmental protection requirement, can be promoted
Develop into building industry from extensive style to intensive style, and the construction quality and safety of architectural engineering can be promoted, reduces construction industry energy
Source consumes.Simultaneously as environmental problem increasingly becomes people's focus of interest, the assembled architecture for meeting environmental requirement is met
Come the good chance greatly developed.
Compared with traditional cast-in-place concrete structure, prefabricated assembled concrete structure has the characteristics that：
(1) efficiency improves, and working hour reduces
(2) on-site wet operation amount is reduced, and construction period shortens
(3) construction quality significantly improves
(4) working condition is improved
(5) material is saved, dead weight is mitigated
(6) small by seasonal effect
(7) be conducive to environmental protection, social benefit is good
Prefabricated prestressing concrete structure applies prestressing technique that is, in prefabricated assembled concrete structure,
Its general construction method is：First prefabricated component transport to construction site assembly it is good after, in the duct that component has been reserved
Deformed bar is worn, using post stretching tensioned prestressing bar, cement mortar fill orifice road, assembled node section is used to use after tensioning
Various methods are attached, and make a stress entirety.This structure assembly prefabricated assembled concrete structure with it is pre-
Prestressed concrete structural advantages, compensate for the bad deficiency of prefabricated assembled concrete structural integrity, more improve
Its performance.
The connecting node of prefabricated components is the key that influence structural integrity in prefabricated assembled concrete structure.According to even
The difference of mode is connect, the connecting node of prefabricated assembled concrete structure can be divided into " wet " connecting node and " dry " connecting node
Two ways." wet " connection be between prefabricated components by cast-in-place concrete etc. in the way of in conjunction with integral.Since this connection needs
The processes such as live formwork, casting concrete and concrete curing are wanted, hinder prefabricated assembled concrete to a certain extent
The development and application of structure." dry " connection is at the construction field (site) by presstressed reinforcing steel, built-in fitting, bolt and pull rod etc. by prefabricated structure
The mode that part links into an integrated entity.The dry type connection of prefabricated assembled concrete structure is with speed of application is fast, wet construction is few, saves
The advantages such as material, in countries uses such as the U.S. than wide.
Current research is integrated as a result, dry node weld interconnection technique and prestressing technique integrated application are in the research of continuous beam
Still belong to blank.Therefore, a kind of prefabricated assembled concrete continuous beam having both dry node interconnection technique and prestressing technique is designed,
It is very important.
Invention content
The purpose of the present invention is to provide a kind of precast prestressed assembly concrete continuous beam dry type connecting nodes, realize
The integrated application of prestressing technique and assembled dry type node technology, this novel fabricated node and widely applied cast-in-place section
Point is compared, and is not only had durability outstanding and economy, while more economizing on resources and the energy, is met wanting for sustainable development
It asks.The present invention also provides the assembly methods of this assembling type node simultaneously.
To achieve the above object, the technical solution that the present invention takes is：A kind of precast prestressed assembly concrete is continuous
Beam dry type connecting node comprising：
Longitudinal reinforcement, carries out overlap joint connection at continuous beam one third, and the lap of splice is born according to continuous beam
Load determines that length and continuous beam equal length after the longitudinal reinforcement overlap joint of 3 sections of beam top, beam lower part longitudinal reinforcement is in continuous beam-ends
Portion is anchored, and anchorage length is determined according to detailing requiments.
Pre-embedded steel slab, respectively in the upper and lower part of left and right test beam splice ends, pre-buried four blocks of steel plates, are located at vertical altogether
To on the outside of reinforcing bar, the upper surface of top pre-embedded steel slab and the lower face of lower part pre-embedded steel slab respectively with the upper and lower end face of test beam
Concordantly.
Steel deck-plate is respectively welded on the outside of the pre-embedded steel slab of test beam connecting pin upper and lower part, to ensure at continuous beam span centre
First there is plastic hinge, top steel deck-plate and lower part steel deck-plate are all equipped with the hole being adapted with pre-embedded steel slab.Using formula (1) and
(2) size of steel deck-plate is calculated.
In formula：
--- the strength failure criterion (MPa) of fillet weld；
fyk--- longitudinal tensile regular reinforcement strength standard value (MPa)；
∑lw--- the sum of computational length of the connection all weld seams in side (mm)；
he--- the effective thickness (mm) of fillet weld.
Preferably, prestress wire uses un-bonded prestressed steel strand in the present invention, is answered in advance using post stretching
The construction of power muscle；Using bellows, reserved prestress wire wears the duct of muscle in test beam when testing beam prefabricated；When tensioning,
Prestress wire is anchored in anchored end using anchorage first, steel cushion block is set between anchorage and test beam, it is secondly right
Prestress wire carry out tensioning, after the completion of tensioning, prestress wire is anchored using anchorage in stretching end, anchorage and
Steel cushion block is set between test beam；Finally it is in the milk to duct using grouting material.
Preferably, it uses and is welded to connect between steel deck-plate and pre-embedded steel slab in the present invention, to ensure steel deck-plate and pre-buried steel
The weld seam of plate can resist tensile stress enough, and design weld seam yield strength is continuous beam span centre longitudinal tensile regular reinforcement yield strength
2 times.
Preferably, precast prestressed assembly concrete continuous beam dry type connecting node in the present invention, specific connection type
It is as follows：First prefabricated test beam when respectively on the outside of the longitudinal reinforcement of test beam upper and lower part distinguish pre-embedded steel slab；Further,
After beam to be tested is in place, bonded using epoxide-resin glue；Further, it after continuous beam meets intensity requirement, adopts
Both sides pre-embedded steel slab is spliced on the outside of pre-embedded steel slab with steel deck-plate, connecting method is welding.
Preferably, it when the present invention is implemented, is as follows：
1. determining the sectional dimension of test beam, the ratio of reinforcement of test beam is calculated, determines the intensity etc. of longitudinal reinforcement and stirrup
Grade and diameter, stirrup spacing, banding steel cage, while determining the position of presstressed reinforcing steel, it is pre- to carry out presstressed reinforcing steel with bellows
The positioning boxed out；
2. determining the strength grade of concrete, while on the outside of the longitudinal reinforcement of the upper and lower part of precast beam splicing end carriage
Pre-embedded steel slab is respectively welded, pours prefabricated beam section；
3. test beam is transported to scene after standard curing in 28 days reaches intensity, by test beam and carries out assembly in place；
4. being reserved in bellows in prefabricated beam section and wearing prestress wire, anchor is carried out to prestress wire in anchored end
Gu cushion block is arranged between anchorage and continuous beam；
5. carrying out injecting glue in seam crossing, after intensity reaches requirement, steel deck-plate is placed on the outside of pre-embedded steel slab, is welded
Connection；
6. after stretch-draw prestressing force steel strand wires to 75 the percent of presstressed reinforcing steel ultimate strength standard value, in continuous beam
The other end is anchored, and cushion block is arranged between anchorage and continuous beam；
7. carrying out slip casing by pressure using grouting material in presstressed reinforcing steel duct.
The present invention provides a kind of new form for the connection of prefabricated assembled continuous beam, and advantage is：
A. the continuous beam deflection of prefabricated assembled concrete pours formula concrete continuous beam more than whole in the present invention；
B. prefabricated assembled concrete continuous beam pours formula concrete continuous beam compared to whole in the present invention, can delay crack
Development, bearing capacity increases；
C. the raw material of component are simple in the present invention, are easy to get；
D. assembling type node is fixed with prestressing technique synthesis by being welded to connect in the present invention, compared to common
Be welded to connect technology, reliability higher；
E. prefabricated assembled concrete test beam can be completed all by prefabrication in the present invention, improve quality assurance.It is existing
The all assembly constructions of field operation, reduce influence of the work progress to environment, reduce the labor of field worker to the greatest extent
Fatigue resistance and difficulty, shorten construction period.
Description of the drawings
Fig. 1 is the precast prestressed assembly concrete continuous beam that present invention assembly is completed.
Fig. 2 is that pre-embedded steel slab of the present invention welds schematic diagram with longitudinal reinforcement.
Fig. 3 is that pre-embedded steel slab of the present invention welds schematic diagram with steel deck-plate.
Fig. 4 is pre-embedded steel slab of the present invention and steel deck-plate stitching portion normal section schematic diagram.
Fig. 5 is continuous beam span centre cross-sectional view of the present invention.
Fig. 6 is continuous beam end cross-sectional schematic diagram of the present invention.
In figure：
Specific implementation mode
To keep present disclosure more obvious and easy to understand, it is described further with reference to the accompanying drawings and detailed description.
As shown in figs. 1 to 6, precast prestressed assembly concrete continuous beam dry type connecting node in the present invention, specifically connects
It is as follows to connect mode：First prefabricated test beam 13 when respectively in the outside of the longitudinal reinforcement of 13 upper and lower part of test beam 1 pre-embedded steel slab respectively
4；Further, it after beam 13 to be tested is in place, is bonded using epoxide-resin glue 7；Further, wait for that continuous beam 13 meets
After intensity requirement, both sides pre-embedded steel slab 4 is spliced in 4 outside of pre-embedded steel slab using steel deck-plate 5, connecting method is weldering
It connects.
When implementation, it is as follows：
1. determining the sectional dimension of test beam 13, the ratio of reinforcement of test beam 13 is calculated, determines longitudinal reinforcement 1 and stirrup 2
Strength grade and diameter, 2 spacing of stirrup, banding steel cage, while determining the position of presstressed reinforcing steel 3, it is carried out in advance with bellows
The positioning of stress rib reserving hole channel 11；
2. determining the strength grade of concrete, while in the longitudinal reinforcement 1 of the upper and lower part of the splicing end carriage of precast beam 13
Pre-embedded steel slab 4 is distinguished in outside, pours prefabricated beam section；
3. test beam 13 is transported to scene after standard curing in 28 days reaches intensity, by test beam 13 and carries out assembly in place；
4. wearing prestress wire 3 in 13 reserving hole channel 11 of prefabricated beam section, anchor is carried out to presstressed reinforcing steel 3 in anchored end
Gu steel cushion block 9 is arranged between anchorage 6 and continuous beam 13；
5. carrying out injecting glue 7 in seam crossing, after intensity reaches requirement, steel deck-plate 5 is placed in 4 outside of pre-embedded steel slab, is carried out
It is welded to connect；
6. after stretch-draw prestressing force steel strand wires 3 to 75 the percent of presstressed reinforcing steel ultimate strength standard value, continuous
13 other end of beam is anchored, and steel cushion block 9 is arranged between anchorage 8 and continuous beam 13；
7. carrying out slip casing by pressure using grouting material in presstressed reinforcing steel duct 11.
Interior joint assembling process of the present invention is as follows：
1. after test beam 13 positions, prestress wire 3 is carried out in duct 11 to wear muscle；
2. connecting end infusion epoxy resin glue 7 in test beam 13, two sections of test beams are bonded as continuous beam 13；
3. after epoxide-resin glue 7 reaches intensity, steel deck-plate 5 is overlying on the outside of pre-embedded steel slab 4, in 5 hole of steel deck-plate
Portion is aligned with two sections of 4 stitching portions of pre-embedded steel slab, is welded in surrounding and the pre-embedded steel slab 4 of steel deck-plate 5.
Claims (4)
1. a kind of precast prestressed assembly concrete continuous beam dry type connecting node, it is characterised in that：Its described continuous beam section
Point structure includes longitudinal reinforcement (1), stirrup (2), prestress wire (3), pre-embedded steel slab (4), steel deck-plate (5), anchored end anchor
Tool (6), epoxide-resin glue (7), stretching end anchorage (8), steel cushion block (9), steel deck-plate punch (10), presstressed reinforcing steel reserving hole channel
(11), weld seam (12) and test beam (13).
2. precast prestressed assembly concrete continuous beam dry type connecting node according to claim 1, it is characterised in that：
Longitudinal reinforcement (1) carries out overlap joint connection at continuous beam (13) one third；Pre-embedded steel slab (4) is respectively in left and right test beam
(13) upper and lower part of splice ends, pre-buried four blocks of steel plates (4), are located on the outside of longitudinal reinforcement (1), top pre-embedded steel slab (4) altogether
Upper surface and lower part pre-embedded steel slab (4) lower face it is concordant with the upper and lower end face of test beam (13) respectively；Steel deck-plate (5) point
It is not welded on the outside of test beam (13) connecting pin upper and lower part pre-embedded steel slab (4), top steel deck-plate (5) and lower part steel deck-plate (5) are all
Equipped with the hole being adapted with pre-embedded steel slab (4).
3. precast prestressed assembly concrete continuous beam dry type connecting node according to claim 1, it is characterised in that：
Prestress wire (3) uses un-bonded prestressed steel strand, and the construction of presstressed reinforcing steel (3) is carried out using post stretching；Test beam
(13) using bellows, reserved prestress wire (3) wears the duct (11) of muscle in test beam (13) when prefabricated；It is first when tensioning
First prestress wire (3) is anchored in anchored end using anchorage (6), steel cushion block is arranged in anchorage (6) between test beam
(9), tensioning secondly is carried out to prestress wire (3), after the completion of tensioning, in stretching end using anchorage (8) to prestress steel twist
Line (3) is anchored, and steel cushion block (9) is arranged between anchorage and test beam；Finally it is in the milk to duct (11) using grouting material.
4. precast prestressed assembly concrete continuous beam dry type connecting node according to claim 1, it is characterised in that：
Using being welded to connect between steel deck-plate (5) and pre-embedded steel slab (4), design weld seam yield strength be continuous beam (13) span centre it is longitudinal by
Draw regular reinforcement (1) yield strength 2 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810471334.5A CN108589916A (en) | 2018-05-17 | 2018-05-17 | A kind of precast prestressed assembled dry type node and assembly method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810471334.5A CN108589916A (en) | 2018-05-17 | 2018-05-17 | A kind of precast prestressed assembled dry type node and assembly method |
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| CN108589916A true CN108589916A (en) | 2018-09-28 |
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| CN201810471334.5A Pending CN108589916A (en) | 2018-05-17 | 2018-05-17 | A kind of precast prestressed assembled dry type node and assembly method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110820532A (en) * | 2019-10-18 | 2020-02-21 | 同济大学 | Design implementation method of beam type bridge girder structure capable of being repeatedly disassembled and assembled |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009091844A (en) * | 2007-10-10 | 2009-04-30 | Takenaka Komuten Co Ltd | Column-beam joint method and column-beam joint structure |
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2018
- 2018-05-17 CN CN201810471334.5A patent/CN108589916A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009091844A (en) * | 2007-10-10 | 2009-04-30 | Takenaka Komuten Co Ltd | Column-beam joint method and column-beam joint structure |
Non-Patent Citations (1)
| Title |
|---|
| 刘芬: "预支装配式预应力混凝土连续梁力学性能的研究", 《东北林业大学硕士论文》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110820532A (en) * | 2019-10-18 | 2020-02-21 | 同济大学 | Design implementation method of beam type bridge girder structure capable of being repeatedly disassembled and assembled |
| CN110820532B (en) * | 2019-10-18 | 2021-06-08 | 同济大学 | Design implementation method of beam type bridge girder structure capable of being repeatedly disassembled and assembled |
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Application publication date: 20180928 |