CN104088401A - Buckling-restrained steel bar construction - Google Patents

Buckling-restrained steel bar construction Download PDF

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Publication number
CN104088401A
CN104088401A CN201410276162.8A CN201410276162A CN104088401A CN 104088401 A CN104088401 A CN 104088401A CN 201410276162 A CN201410276162 A CN 201410276162A CN 104088401 A CN104088401 A CN 104088401A
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CN
China
Prior art keywords
reinforcement
steel bar
rebar
sleeve
buckling
Prior art date
Application number
CN201410276162.8A
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Chinese (zh)
Inventor
贾俊峰
张强
韩强
许紫刚
杜修力
Original Assignee
北京工业大学
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Application filed by 北京工业大学 filed Critical 北京工业大学
Priority to CN201410276162.8A priority Critical patent/CN104088401A/en
Publication of CN104088401A publication Critical patent/CN104088401A/en

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Abstract

The invention provides a buckling-restrained steel bar construction, belonging to the field of architectural engineering technology. The buckling-restrained steel bar construction comprises an upper steel bar, a lower steel bar, a restraining sleeve and an enclosing material, wherein the upper steel bar is a common longitudinal steel bar, the tail end of the upper steel bar is processed with screw thread, the lower steel bar is a common longitudinal steel bar, the end of the lower steel bar adjacent to the upper steel bar is processed with screw thread, the restraining sleeve is a sleeve with an internal diameter greater than the diameters of the upper steel bar and the lower steel bar, the inner side of the end of the restraining sleeve connected with the upper steel bar and the lower steel bar is processed with a ferrule screw thread straight joint matching with the specifications of the screw thread on the upper steel bar and the lower steel bar, the outer wall of the restraining sleeve is processed with a hexagonal neck, and the enclosing material is used for restraining the upper pipe orifice of the sleeve, sealing a gap between the upper steel bar and the restraining sleeve and preventing mortar from flowing into the restraining sleeve. The buckling-restrained steel bar construction can be used as a longitudinal steel bar for a plastic hinge zone of key bearing members like a structure column and a bridge pier.

Description

A kind of anti-buckling reinforcement constitution
Technical field
The present invention relates to a kind of anti-buckling reinforcement constitution and connected mode thereof, be specifically related to anti-seismic steel bar structure and connected mode thereof in reinforced concrete member.
Background technology
Construct a bridge in earthquake zone, when aqueduct, building and other large-scale structure, threaten in order to alleviate potential earthquake, must carry out seismic design to these class structure.Tradition Reinforced Concrete Pier Column in antidetonation longitudinal reinforcement be everlasting job site adopt shorter threaded sleeve upper reinforcement and lower rebar are threaded connection, complete the stressed transmission of upper and lower part reinforcing bar, but this kind of connected mode only has the power transmission function of longitudinal reinforcement, the lateral buckling of longitudinal reinforcement adopts layout to realize around the stirrup of longitudinal reinforcement circumference conventionally, and this can suppress the flexing of longitudinal reinforcement to a certain extent.But when seismic load is excessive or repeated action after; longitudinal reinforcement distortion extruded concrete topping makes it fragmentation and peels off; stirrup becomes flexible or surrender loses the restraint forces to antidetonation longitudinal reinforcement; the longitudinal reinforcement of pier stud there will be obvious buckling failure under geological process, and after shake, " lantern-shaped " failure mode often appears in pier stud bottom or top and plastic hinge region, crossbeam connected node place.This failure mode is normally expendable, generally structure can only be pushed over to reconstruction, caused serious economic loss, the restoration and reconstruction of structure will cause serious obstruction to shaking rear rescue and relief work, and then may cause more serious economic loss and casualties.For important infrastructures such as Urban Bridge, once heavy damage occurs in this plastic hinge region, will inevitably cause serious delay to city earthquake relief work.Therefore, if can avoid this " lantern-shaped " failure mode of pier stud plastic hinge region in engineering structures as far as possible, making structure stressed longitudinal reinforcement of the antidetonation of plastic hinge region after earthquake that lateral buckling not occur destroys, by the restorability of structure after the shock resistance of remarkable pier stud and shake, there is good economic benefit and positive social influence.
Summary of the invention
In order to overcome above-mentioned defect, the invention provides a kind of anti-buckling reinforcing bar having compared with highly energy-consuming ability, for Reinforced Concrete Pier Column member, the effect that can play and prevent longitudinal anti-seismic steel bar buckling failure, improves shock resistance.
Technical scheme of the present invention is as follows:
This anti-buckling reinforcement constitution is made up of upper reinforcement, lower rebar, confinement sleeve and closed material.Upper reinforcement is common longitudinal reinforcement, end machining screw; Lower rebar is common longitudinal reinforcement, and lower rebar is in one end machining screw adjacent with upper reinforcement; Confinement sleeve is the sleeve pipe of the large upper reinforcement of internal diameter and lower rebar diameter, confinement sleeve is processed with in the inner side, one end being connected with upper reinforcement and lower rebar the bite type thread straight-through union mating with the screw thread specification in upper reinforcement, lower rebar, is processed with hexagon draw-in groove at the outer wall of confinement sleeve; Closed material is for the confinement sleeve upper end mouth of pipe, and the gap between sealing upper reinforcement and confinement sleeve, prevents that mortar from flowing into confinement sleeve inside.This anti-buckling reinforcement constitution is comparatively simple, both retained the transmission force property that conventional steel tendon bush is threaded, improve again the anti-buckling ability of plastic hinge region longitudinal reinforcement, can realize the tension and compression hysteretic energy of longitudinal reinforcement in pier stud, increased the hysteretic energy ability of pier stud under geological process.
Described upper reinforcement can be identical or different from lower rebar diameter specifications, can be according to the normal design arrangement of reinforcement of Reinforced Concrete Pier Column member, do not change the original Reinforcement Design of pier stud, the anti-buckling destruction that only adopts the splicing sleeve with anti-buckling ability to complete being threaded of upper and lower part longitudinal reinforcement and upper reinforcement in pier stud plastic hinge region ensures upper reinforcement and lower rebar dead in line simultaneously.
Be an entirety for the bite type thread straight-through union and the confinement sleeve that connect upper reinforcement and lower rebar, ensure that confinement sleeve steel pipe is reliably connected with upper reinforcement and lower rebar, confinement sleeve inner side is at the reinforcing bar join domain screw thread that processing is mated with upper reinforcement and lower rebar screw thread respectively, and screw thread is straight thread or taper thread; Be processed with hexagon draw-in groove at confinement sleeve outer wall, the precession of screw thread in convenient construction process.
Described confinement sleeve rigidity is larger, leaves certain interval and be convenient to install between confinement sleeve and upper reinforcement, can prevent the lateral buckling distortion of upper reinforcement.
The described isolated material for sealing upper reinforcement and cannula tip gap can be selected General Purpose Rubber or glass cement, and while preventing cast-in-situ concrete, mortar enters in confinement sleeve.
The relatively existing traditional longitudinal reinforcement of the present invention and connection structure, have the following advantages: longitudinal reinforcement reinforcing bar not only has the power transmission function of conventional threads connecting reinforcement, has improved anti-flexion capabilities simultaneously.Pier stud is under horizontal earthquake action, reduce the probability that in reinforced concrete member, longitudinal reinforcement flexing in plastic hinge region lost efficacy, avoided to a certain extent geological process to cause the heavy damage of Reinforced Concrete Pier Column, avoid due to " lantern-shaped " of longitudinal reinforcement thus destroy problems such as needing the reconstruction of whole member.In addition, be subject to the top longitudinal reinforcement of sleeve pipe constraint under tension and compression effect, only to produce axial deformation, there is full hysteresis loop and good energy consumption effect, and then improved the energy dissipation capacity of the primary structure members such as pier stud.In addition anti-buckling reinforcement constitution of the present invention and connected mode, also has the advantages such as simple structure, cost are low, easy construction, can be used as plastic hinge region anti-of all kinds of engineering structures primary structure members
Brief description of the drawings
The anti-buckling reinforcement constitution of Fig. 1 and connected mode sectional drawing.
The confinement sleeve sectional drawing of the anti-buckling reinforcement constitution of Fig. 2 and connected mode.
The confinement sleeve sectional view of the anti-buckling reinforcement constitution of Fig. 3 and connected mode.
The closed material constructional detail of the anti-buckling reinforcement constitution of Fig. 4 and connected mode.
The longitudinal reinforcement link cage structure detail drawing of the anti-buckling reinforcement constitution of Fig. 5 and connected mode.
In figure: 1-upper reinforcement; 2-lower rebar; 3-constraint steel pipe; 4-closed material; 5-screw thread steel; 6-thread straight-through union; 7-steel pipe draw-in groove.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
Fig. 1 is the section of anti-buckling reinforcement constitution provided by the invention and connected mode.Anti-buckling reinforcement constitution in the present invention is made up of upper reinforcement 1, lower rebar 2, constraint steel pipe 3 and closed material 4.It is inner that upper reinforcement 1 and lower rebar 2 are arranged on structure as the axle power unit of structure; Constraint steel pipe 3 as constraint element by being threaded in upper reinforcement 1 outside; Closed material 4 is used in constraint steel pipe 3 upper ends of structure.Upper reinforcement 1 and lower rebar 2 one end are provided with screw thread 5, and reach should be determined by vertical muscle tension and compression design load and screw strength; Constraint inside, steel pipe lower end is also provided with corresponding thread straight-through union 6, and its reach should be greater than the summation of the reach of upper reinforcement 1 and lower rebar 2, is convenient to instrument interlock steel pipe in the time that outer wall of steel pipe design is processed with draw-in groove 7 for precession screw thread; Retrain steel pipe 3 length and need to determine according to the design of Reinforced Concrete Pier Column, its length should be greater than Reinforced Concrete Pier Column Plastic hinge length.
In the bottom of the member such as pier, post that often occurs buckling failure, replace traditional reinforcing bar can play good anti-buckling effect with anti-buckling reinforcing bar.The concrete operation of the present invention is as follows:
First retrain well steel pipe 3 in factory process, constraint steel pipe length will be determined according to concrete pier, post member buckling failure scope; At the construction field (site), lower rebar 2 need to be fixed on to basis upper, lower rebar 1 lower end building can be fixed, also can be according to condition of construction by online at reinforcement foundation first lower rebar colligation; Then will retrain steel pipe 3 according to graphic connected mode, be connected with upper reinforcement 1 by instrument, and when upper reinforcement 1 screw thread enters after constraint steel pipe 3 completely, because structure restriction can not continue precession, therefore can control upper reinforcement 1 and put in length; Insert closed material 4 in constraint steel pipe 3 upper ends subsequently; Finally more mounted constraint steel pipe 3 and upper reinforcement 1 are connected in lower rebar 2 according to diagram by instrument, to this whole anti-buckling bar construction installation, can build according to construction arrangement.

Claims (5)

1. an anti-buckling reinforcement constitution, is characterized in that: it comprises upper reinforcement (1), lower rebar (2), confinement sleeve (3) and closed material (4); Upper reinforcement (1) is common longitudinal reinforcement, end machining screw (5), and the screw thread (5) on described upper reinforcement (1) is straight thread or taper thread; Lower rebar (2) is common longitudinal reinforcement, lower rebar (2) is in one end machining screw (5) adjacent with upper reinforcement (1), and the screw thread (5) on the firm muscle in described bottom (2) is straight thread or taper thread; Confinement sleeve (3) is greater than the sleeve pipe of upper reinforcement (1) and lower rebar (2) diameter for internal diameter, confinement sleeve (3) is processed with in the inner side, one end being connected with upper reinforcement (1) and lower rebar (2) the bite type thread straight-through union (6) mating with screw thread (5) specification in upper reinforcement (1), lower rebar (2), is processed with hexagon draw-in groove (7) at the outer wall of confinement sleeve (3); Closed material (4) is for the confinement sleeve upper end mouth of pipe, and the gap between sealing upper reinforcement (1) and confinement sleeve (3), prevents that mortar from flowing into confinement sleeve (3) inside.
2. anti-buckling reinforcement constitution according to claim 1, it is characterized in that: top longitudinal reinforcement (1) is identical or different with bottom longitudinal reinforcement (2) diameter specifications, according to the normal design arrangement of reinforcement of Reinforced Concrete Pier Column member, with bite type thread straight-through union (6) connection by constraint pipe box (3), ensure upper reinforcement and lower rebar dead in line.
3. anti-buckling reinforcement constitution according to claim 1, it is characterized in that: be an entirety for the bite type thread straight-through union (6) that connects upper reinforcement (1) and lower rebar (2) with confinement sleeve (3), ensure that confinement sleeve steel pipe (3) is reliably connected with upper reinforcement (1) and lower rebar (2), confinement sleeve (6) inner side processes respectively at reinforcing bar join domain the screw thread mating with upper reinforcement (1) and lower rebar (2) screw thread; Be processed with hexagon draw-in groove (7) at confinement sleeve (6) outer wall, the precession of screw thread in convenient construction process.
4. anti-buckling reinforcement constitution according to claim 1, it is characterized in that: the available General Purpose Rubber of closed material (4) or glass cement, ensure the gap positiver sealing between confinement sleeve (3) end and upper reinforcement (1), there is water isolating, prevent that in construction in later period mortar etc. flows into confinement sleeve (3) inside.
5. anti-buckling reinforcement constitution according to claim 1, it is characterized in that: under the incidental load effects such as seismic load, upper reinforcement (1) in plastic hinge region and lower rebar (2) are subject to the lateral restraint of external constraint sleeve pipe (3) in the time that pressurized is surrendered, avoid the pressurized flexing of upper reinforcement (1) in plastic hinge region and lower rebar (2) to lose efficacy, upper reinforcement (1) and lower rebar (2) the tension and compression hysteresis distortion in confinement sleeve simultaneously can improve enough energy dissipation capacities of member of carrying.
CN201410276162.8A 2014-06-19 2014-06-19 Buckling-restrained steel bar construction CN104088401A (en)

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Application Number Priority Date Filing Date Title
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CN104088401A true CN104088401A (en) 2014-10-08

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104878948A (en) * 2015-04-07 2015-09-02 淮海工学院 Reinforced concrete frame beam hogging moment region reinforcing method and reinforcing device
CN104963453A (en) * 2015-06-11 2015-10-07 广东省建科建筑设计院 Steel bar mechanical connecting sleeve for assembly concrete strong connection
CN105587075A (en) * 2016-02-29 2016-05-18 北京工业大学 Buckling constraint structure for longitudinal steel bar in plastic-hinge region of reinforced concrete member

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1025803A (en) * 1996-07-12 1998-01-27 Taisei Corp Reinforcement with damping mechanism, and reinforced concrete structure body
JP2004011209A (en) * 2002-06-05 2004-01-15 Hisahiro Hiraishi Yield predetermined-region surrounding structure of screw reinforcement and material-end fixing structure of component in reinforced concrete building
KR100546434B1 (en) * 2004-06-10 2006-01-26 채흥석 Joint unit for turnbuckle connection
JP3971679B2 (en) * 2002-08-02 2007-09-05 久廣 平石 Material end fixing structure for reinforced concrete buildings
JP2014015728A (en) * 2012-07-06 2014-01-30 Akira Fukuda Joint structure for threaded deformed bar
JP5451572B2 (en) * 2010-10-04 2014-03-26 憲峰 大倉 Connector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1025803A (en) * 1996-07-12 1998-01-27 Taisei Corp Reinforcement with damping mechanism, and reinforced concrete structure body
JP2004011209A (en) * 2002-06-05 2004-01-15 Hisahiro Hiraishi Yield predetermined-region surrounding structure of screw reinforcement and material-end fixing structure of component in reinforced concrete building
JP3971679B2 (en) * 2002-08-02 2007-09-05 久廣 平石 Material end fixing structure for reinforced concrete buildings
KR100546434B1 (en) * 2004-06-10 2006-01-26 채흥석 Joint unit for turnbuckle connection
JP5451572B2 (en) * 2010-10-04 2014-03-26 憲峰 大倉 Connector
JP2014015728A (en) * 2012-07-06 2014-01-30 Akira Fukuda Joint structure for threaded deformed bar

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104878948A (en) * 2015-04-07 2015-09-02 淮海工学院 Reinforced concrete frame beam hogging moment region reinforcing method and reinforcing device
CN104878948B (en) * 2015-04-07 2017-06-16 淮海工学院 A kind of reinforcement means of rc-frame-beam hogging moment area
CN104963453A (en) * 2015-06-11 2015-10-07 广东省建科建筑设计院 Steel bar mechanical connecting sleeve for assembly concrete strong connection
CN105587075A (en) * 2016-02-29 2016-05-18 北京工业大学 Buckling constraint structure for longitudinal steel bar in plastic-hinge region of reinforced concrete member

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Application publication date: 20141008