CN202509791U - Steel bar for prestressed concrete (PC steel bar) reinforcing device for reinforced concrete cylindrical frame space node core region - Google Patents

Steel bar for prestressed concrete (PC steel bar) reinforcing device for reinforced concrete cylindrical frame space node core region Download PDF

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Publication number
CN202509791U
CN202509791U CN2012200582032U CN201220058203U CN202509791U CN 202509791 U CN202509791 U CN 202509791U CN 2012200582032 U CN2012200582032 U CN 2012200582032U CN 201220058203 U CN201220058203 U CN 201220058203U CN 202509791 U CN202509791 U CN 202509791U
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China
Prior art keywords
rod iron
arc
steel bar
core district
nut
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Expired - Fee Related
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CN2012200582032U
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Chinese (zh)
Inventor
郭二伟
李振宝
马华
高全雷
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Beijing University of Technology
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Beijing University of Technology
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Abstract

The utility model relates to a steel bar for prestressed concrete (PC steel bar) reinforcing device for a reinforced concrete cylindrical frame space node core region and belongs to the field of civil engineering strengthening construction. The device comprises a node core region, arc-shaped anchoring fasteners, PC steel bars, a nut and a sealing cap, through holes are respectively arranged on two limbs of each arc-shaped anchoring fastener, the node core region is a cylindrical area which is formed by intersection of a pillar, a beam and a floorslab, four arc-shaped corners in the node core region are subjected to grinding processing, external screw threads are arranged at two ends of each PC steel bar, one limb of each arc-shaped anchoring fastener is connected with the nut through one end of each PC steel bar which penetrates through reserved through holes, the sealing cap is installed on the outside of the nut, and a circle of circular PC steel bar hoop which restrains the node core region is formed by four arc-shaped anchoring fasteners and four PC steel bars through the nut. The PC steel bar reinforcing device has the advantages that the device can directly bear a shearing force, a three-way constraint function can be provided, the stress lagging can be relieved, and common working conditions of novel and old structures and force conditions of the core region can be improved.

Description

Reinforced Concrete Circular Cylinder frame space node nuclear core district PC rod iron bracing means
Technical field
The utility model relates to a kind of Reinforced Concrete Circular Cylinder frame space node nuclear core district PC rod iron bracing means, belongs to Reinforced Concrete Circular Cylinder frame space node nuclear core district field of reinforcement.
Background technology
In civil engineering construction, reinforced concrete frame structure is used with its superior anti-seismic performance widely.Wherein bean column node is the frame construction important component part, plays a part to transmit and distribution internal force and assurance structural integrity.When geological process, the shearing that receives in the node nuclear core district is a damageable zone in the frame construction more greatly and very complicated; And the brittle shear destruction in node nuclear core district, often cause collapsing of total, so; In seismic design; Adopt " strong shear capacity and weak bending capacity, strong column and weak beam, the weak member of strong node " design principles.
When engineering structures suffers the change of seismic damage, structure design and construction error, building function of use and adds layer, the old building factors such as standard raisings, the change of earthquake resistant code clause of setting up defences and all must carry out corresponding seismic hardening to structure, with the anti-seismic performance of raising structure.Large scale construction, newly-built and reinforcing is laid equal stress on and the maintenance and reinforcement three phases has all been experienced in the engineering construction of developed country in the world.The ratio between investments that the U.S., Britain, Germany are used for maintenance and reinforcement has all surpassed 50% of total investment for construction.And in the existing nearly 7,000,000,000 m2 town buildings of China, existing 50% has got into the old building that the ageing step needs repairing and reinforces.Therefore, for effective earthquake disaster mitigation, also should strengthen research to the existing building Shockproof reinforcing method.
In building structural element is reinforced, all there is corresponding standard to comply with for the reinforcing design and the construction of beam, post, but because the reinforcing in node nuclear core district and repair very difficulty, at present, still immature reinforcement means and construction technology more do not have the standard of maturation and can comply with.
At present, the reinforcing technique about node nuclear core district that has launched both at home and abroad mainly contains:
(1) increasing section method: through increasing node nuclear core district section area, improve the anchoring situation of the vertical muscle of beam, strengthen node nuclear core district force transmission mechanism, thereby improve sloping section shear resistance and rigidity of section, play the effect of reinforcement and strengthening.Construction technology is simple, compliance is strong, and has ripe design and construction experience; But the situ wet operation is long in time limit, and needs the cutter through-flooring.Should be used for the reinforcing in plane and space nodes nuclear core district.
(2) encased steel reinforcing method: around node nuclear core district, wrap up shaped steel and reinforce; Steel plate is through directly bearing shearing, simultaneously node nuclear core district formed effect of contraction, in increasing section size not; Can improve nuclear core district shear-carrying capacity significantly; Dry construction is simple, and price is low, and the on-the-spot duration is short; Wet construction is simple, and price is low, and is on-the-spot long in time limit.But require the shaped steel surface temperature should be lower than 60 ℃, and field Welding, need carry out preservative treatment.The reinforcing of being suitable for plane and space nodes nuclear core district.
(3) affixing steel plate reinforcement method: in node nuclear core district, utilize structure glue that steel plate is sticked on the surface of examining the core district, steel plate can directly bear shearing, simultaneously node nuclear core district is formed effect of contraction, improves the shear-carrying capacity and the rigidity of section in nuclear core district.Construction is simple, and field Welding is long in time limit.But require the shaped steel surface temperature should be lower than 60 ℃, need carry out preservative treatment.The reinforcing of being suitable for plane node nuclear core district.
(4) paste the carbon fiber reinforcement method: with resin glue carbon fiber or glass fibre sheet are sticked on node nuclear core district and drawn the surface,, improve node nuclear core district's shear-carrying capacity and rigidity of section through directly being cut and retrain nuclear core district concrete.High-strength efficient, corrosion resistance and good endurance do not increase the deadweight and the volume of member, and be widely applicable, is convenient to construction, need not large-scale construction equipment, and speed of application is fast, thereby work efficiency is very high.The reinforcing of being suitable for plane node nuclear core district.
In general, more than several kinds of reinforcement means, be adapted to the reinforcing design in plane node nuclear core district more, have comparatively difficulty and cost is higher, the secondary loading structural strain lags behind, problems such as consolidation effect is not good, site operation inconvenience of structure off-load.And for the cylindrical frame space nodes, because the existence of orthogonal beam is all around made troubles to the package reinforcing in node nuclear core district, therefore, the reinforcing problem in cylindrical frame space nodes nuclear core district is not well solved as yet.
The utility model content
The utility model purpose is the problem to existence in above-mentioned Reinforced Concrete Circular Cylinder frame space node nuclear core district's reinforcing design and the construction; A kind of reinforcement means and PC rod iron bracing means are provided, can significantly improve the shear-carrying capacity and the anti-seismic performance in node nuclear core district.Have the truss model and barocline rod model according to the stressed of node nuclear core district, this reinforces mainly and realizes with the concrete effect of contraction in reinforcement nuclear core district through directly bearing shearing.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts is following:
A kind of Reinforced Concrete Circular Cylinder frame space node nuclear core district PC rod iron bracing means, it is characterized in that: said node nuclear core district is for being intersected the cylindrical region that forms by post, beam and floor; Said PC rod iron bracing means comprises arc anchoring fastener, PC rod iron, nut and sealing cap; The both sides of said arc anchoring fastener are provided with two vertical with beam respectively limbs, and the arc bight in inboard arcwall face in the middle of the said arc anchoring fastener and node nuclear core district fits tightly; Two limbs of said arc anchoring fastener have through hole; Be provided with the PC rod iron in the through hole; The two ends of said PC rod iron are provided with external screw thread, and external screw thread is provided with nut, and said sealing cap is installed in the nut outside; Every PC rod iron passes a limb of the arc anchoring fastener of beam and beam both sides, thereby two arc anchoring fasteners of beam both sides are connected and fixed; Four arc anchoring fasteners and four PC rod irons form the circular PC rod iron cuff that the said node of a circle constraint is examined the core district through nut.
Further, four arc angles in said node nuclear core district processing of polishing.
Further, said PC rod iron diameter is 10mm~20mm.
Further, the height of said nut is 1.5~2.0 times of said PC rod iron diameter.
Further, said PC rod iron cuff is one or more layers, and the spacing of adjacent PC rod iron cuff is 100mm~300mm during for multilayer.
The utlity model has following advantage:
1, consolidation effect is good.The truss model and the rod model that baroclines from node nuclear core district; Adopt prestressing force to be connected to form hoop PC rod iron cuff through PC rod iron and arc anchoring fastener; Not only can directly bear the shearing in nuclear core district; Also having provides good three-dimensional effect of contraction to nuclear core district, can increase substantially the shear-carrying capacity and the rigidity of section in node nuclear core district, makes it to have better anti.
2, stressed more reasonable.PC rod iron cuff can make node nuclear core district concrete be in the three dimension stress state in advance; Reach good binding effect; The PC rod iron is shared the load of original structure stressed generation for the first time in advance, has alleviated the stress level of original structure, makes that ubiquitous stress delay problem is eased in the reinforcing.Improve the co-operation condition of the old and new's structure, improve the force-bearing situation in nuclear core district greatly.
3, prestressing force applies conveniently.Can apply quantitative prestressing force easily through the PC rod iron, can with rigidity of section different effect of contractions be provided according to the required different shear-carrying capacity of various anti-seismic performances.Sealing cap can provide corrosion-resistanting waterproofing performance preferably, gives follow-uply to apply prestressing force again and repair facilitates.
4, construction is simple, compliance is strong.Have and need not increase to support, need not field Welding, need not heavy-duty machinery, need not unloading, convenient and quick construction, characteristics such as the duration is shorter, and cost is lower.Should in the reinforcing in various planes and space nodes nuclear core district, use.
Member research through the Reinforced Concrete Circular Cylinder frame space node that adopts the utility model device to reinforce being examined the core district shows, the crack resistance in node nuclear core district, and shear-carrying capacity all is significantly improved, and ductility can satisfy the anti-seismic performance requirement of frame joint.The utility model in the seismic hardening of existing structure, will have good prospect as a kind of effective bracing means of cylindrical frame space nodes.
Through accompanying drawing and embodiment the utility model scheme is done further detailed description below.
Description of drawings
Fig. 1 is that the utility model is used sketch map in cylindrical frame space nodes nuclear core district;
Fig. 2 is an A-A sectional drawing among Fig. 1;
Fig. 3 is PC rod iron cuff (10) the modular construction sketch map of the utility model;
Fig. 4 is arc anchoring fastener (6) the front projection figure of the utility model;
Fig. 5 is arc anchoring fastener (6) the side projection figure of the utility model;
Fig. 6 is arc anchoring fastener (6) horizontal projection of the utility model;
Fig. 7 is arc anchoring fastener (6) 3-D view of the utility model.
Description of reference numerals
1, node nuclear core district, 2, post, 3, beam, 4, floor, 5, the beam pore-forming, 6, arc anchoring fastener, 7, the PC rod iron, 8, nut, 9, sealing cap, 10, PC rod iron cuff.
The specific embodiment
Shown in Fig. 1-7, a kind of Reinforced Concrete Circular Cylinder frame space node nuclear core district PC rod iron bracing means of the utility model, wherein, the cylindrical region that forms is intersected by post 2, beam 3 and floor 4 in node nuclear core district 1; PC rod iron bracing means comprises arc anchoring fastener 6, PC rod iron 7, nut 8 and sealing cap 9; The both sides of arc anchoring fastener 6 are provided with respectively two limbs vertical with beam 3, and the inboard arcwall face in the middle of the arc anchoring fastener 6 fits tightly with the arc bight that node is examined the core district; Two limbs of arc anchoring fastener 6 have through hole; Be provided with PC rod iron 7 in the through hole; The two ends of said PC rod iron 7 are provided with external screw thread, and external screw thread is provided with nut 8, and said sealing cap 9 is installed in nut 8 outsides; Every PC rod iron 7 passes a limb of the arc anchoring fastener 6 of beam pore-forming 5 and beam 3 both sides in the beam 3, thereby two arc anchoring fasteners 6 of beam 3 both sides are connected and fixed; Four arc anchoring fasteners 6 and four PC rod irons 7 form the circular PC rod iron cuff 10 that the said node of a circle constraint is examined core district 1 through nut 8.Wherein, four arc angles in node nuclear core district processing of polishing.PC rod iron 7 diameters are 10mm~20mm.The height of nut 8 is 1.5~2.0 times of said PC rod iron 7 diameters.PC rod iron cuff 10 is one or more layers, and the spacing of adjacent PC rod iron cuff 10 is 100mm~300mm during for multilayer.
The construction requirement of the utility model is following:
1, basic demand
1.1, the cylinder node that the is reinforced nuclear core district 1 concrete on-the-spot strength grade that detects should not be lower than C25.
1.2, should to adopt diameter be 10mm~20mm to PC rod iron 7, the height of nut 8 is answered 1.5~2.0 times of the diameter of bolt.
1.3, the long-term environment temperature of using should not surpass 60 ℃, relative humidity should and not have chemical attack and high humidity high temperature greater than 70%.
2, preparation of construction
2.1, the study design drawing, establishment detailed construction scheme and reinforce thin portion drawing etc.
2.2, PC rod iron 7, arc anchoring fastener, nut 8, sealing cap 9, acetone etc.
2.3, water is drilled to hole equipment or Churn drill, angle grinding machine or abrasive machine, torque wrench, wire brush, hairbrush, gloves, steel ruler etc.
3, construction technology process
Preparation of construction → calibration position → clear up, repair former member → anchoring fastener and fix → PC rod iron 7 installation → prestressed stretch-draws → go along with sb. to guard him.
4, key points for operation
4.1, the beam-ends pore-forming: at the beam-ends depth of section place of required reinforcing, water bores or the Churn drill pore-forming, and removes the floating ash of internal surface of hole clean with compressed air.
4.2, corner surface handles: the node nuclear concrete surface position, 1 four bights, core district to fixing anchoring fastener is smooth with grinder buffing, until spilling the new interface of concrete structure fully, and with compressed air the surface floating ash is removed totally.
4.3, arc anchoring fastener 6 is fixing: the anchoring fastener is fixed to polishing position, node nuclear arc bight, core district, can directly processes by factory, and carry out preservative treatment.
4.4, PC rod iron 7 installs: the boring of PC rod iron 7 being passed beam-ends is connected through bolt with the anchoring fastener in bight.And the position through preparatory stretch-draw adjustment PC rod iron cuff 10, guarantee the precision of installing.It is 10mm~20mm that PC rod iron 7 adopts diameter, and carries out preservative treatment.PC rod iron cuff 10 can be one or more, for a plurality of time interval S are 100mm~300mm.
4.5, PC rod iron 7 prestressing force apply: utilize torque wrench that PC rod iron 7 is applied certain prestressing force.The stretch-draw prestressing force that applies for these PC rod iron 7 tensile strength 20%~70%.
4.6, surface protection: because PC rod iron 7 is through antiseptic,, be need not do anticorrosive work for the cylinder node bracing means that is in the general environment; But the concrete component for being in particular surroundings such as high temperature, high humidity, burn into radioactivity etc. should adopt special safeguard procedures.
The above is merely wherein a kind of embodiment of utility model, also can be used for other structural element and reinforce.Can after factory's medium quantity batch processing, directly be applied in the practical structures for PC rod iron cuff.Every any modification, change or equivalent structure of above embodiment being made according to the utility model technical spirit changes, and all should belong to the protection domain of the utility model technical scheme.

Claims (4)

1. a Reinforced Concrete Circular Cylinder frame space node is examined core district PC rod iron bracing means, it is characterized in that: said node nuclear core district (1) is for being intersected the cylindrical region that forms by post (2), beam (3) and floor (4); Said PC rod iron bracing means comprises arc anchoring fastener (6), PC rod iron (7), nut (8) and sealing cap (9); The both sides of said arc anchoring fastener (6) are provided with two vertical with beam (3) respectively limbs, and the arc bight in inboard arcwall face in the middle of the said arc anchoring fastener (6) and node nuclear core district fits tightly; Two limbs of said arc anchoring fastener (6) have through hole; Be provided with PC rod iron (7) in the through hole; The two ends of said PC rod iron (7) are provided with external screw thread, and external screw thread is provided with nut (8), and said sealing cap (9) is installed in nut (8) outside; Every PC rod iron (7) passes a limb of the arc anchoring fastener (6) of beam (3) and beam (3) both sides, thereby two arc anchoring fasteners (6) of beam (3) both sides are connected and fixed; Four arc anchoring fasteners (6) and four PC rod irons (7) form the circular PC rod iron cuff (10) in a circle said node nuclear core district of constraint (1) through nut (8).
2. Reinforced Concrete Circular Cylinder frame space node nuclear core district PC rod iron bracing means according to claim 1, it is characterized in that: said PC rod iron (7) diameter is 10mm~20mm.
3. Reinforced Concrete Circular Cylinder frame space node nuclear core district PC rod iron bracing means according to claim 1, it is characterized in that: the height of said nut (8) is 1.5~2.0 times of said PC rod iron (7) diameter.
4. Reinforced Concrete Circular Cylinder frame space node nuclear core district PC rod iron bracing means according to claim 1, it is characterized in that: said PC rod iron cuff (10) is one or more layers, and the spacing of adjacent PC rod iron cuff (10) is 100mm~300mm during for multilayer.
CN2012200582032U 2012-02-21 2012-02-21 Steel bar for prestressed concrete (PC steel bar) reinforcing device for reinforced concrete cylindrical frame space node core region Expired - Fee Related CN202509791U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102587686A (en) * 2012-02-21 2012-07-18 北京工业大学 Device for strengthening PC steel bar in core area of space node of reinforced concrete cylindrical frame
CN104912346A (en) * 2015-06-01 2015-09-16 兰州理工大学 Reinforced concrete framework structure node reinforcing device
CN106760015A (en) * 2016-12-22 2017-05-31 清华大学 Power consumption rod iron and the concrete energy-dissipation structure with it
CN106978909A (en) * 2017-05-17 2017-07-25 李碧卿 A kind of method that beams of concrete is connected with profile steel concrete column joint reinforcing bar
JP2019002143A (en) * 2017-06-12 2019-01-10 清水建設株式会社 Reinforcing structure of junction between column and beam

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102587686A (en) * 2012-02-21 2012-07-18 北京工业大学 Device for strengthening PC steel bar in core area of space node of reinforced concrete cylindrical frame
CN102587686B (en) * 2012-02-21 2014-01-22 北京工业大学 Device for strengthening PC steel bar in core area of space node of reinforced concrete cylindrical frame
CN104912346A (en) * 2015-06-01 2015-09-16 兰州理工大学 Reinforced concrete framework structure node reinforcing device
CN106760015A (en) * 2016-12-22 2017-05-31 清华大学 Power consumption rod iron and the concrete energy-dissipation structure with it
CN106760015B (en) * 2016-12-22 2020-05-05 清华大学 Energy consumption rod iron and concrete energy consumption structure with same
CN106978909A (en) * 2017-05-17 2017-07-25 李碧卿 A kind of method that beams of concrete is connected with profile steel concrete column joint reinforcing bar
JP2019002143A (en) * 2017-06-12 2019-01-10 清水建設株式会社 Reinforcing structure of junction between column and beam

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121031

Termination date: 20130221