CN204385941U - Prestressing force buckling restrained brace - Google Patents

Prestressing force buckling restrained brace Download PDF

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Publication number
CN204385941U
CN204385941U CN201420747930.9U CN201420747930U CN204385941U CN 204385941 U CN204385941 U CN 204385941U CN 201420747930 U CN201420747930 U CN 201420747930U CN 204385941 U CN204385941 U CN 204385941U
Authority
CN
China
Prior art keywords
prestressing force
restrained brace
buckling restrained
concrete
steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420747930.9U
Other languages
Chinese (zh)
Inventor
张国伟
吴徽
吴昆仑
肖伟
陈鹏
张品
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing University of Civil Engineering and Architecture
Original Assignee
Beijing University of Civil Engineering and Architecture
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing University of Civil Engineering and Architecture filed Critical Beijing University of Civil Engineering and Architecture
Priority to CN201420747930.9U priority Critical patent/CN204385941U/en
Application granted granted Critical
Publication of CN204385941U publication Critical patent/CN204385941U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of prestressing force buckling restrained brace, it is characterized in that, form by with lower component: in-line or star section steel core (1), concrete (2), square-section or circular cross-section outsourcing unit (3), presstressed reinforcing steel, prestressed cable, prestress wire or prestressing force screw rod (4).A kind of stress buckling restrained brace, under traditional buckling restrained brace structure prerequisite, to original concrete unit precompressed, more effectively play concrete effect of contraction and reduce cracking, especially be applied to and support across high-bearing capacity greatly, namely relative minimizing sectional dimension reduces outsourcing constraint material, ensures structural performance and meets design outward appearance demand, reduces and occupy space.Secondly presstressed reinforcing steel, prestressed cable, prestress wire or prestressing force screw rod can play unbending.Be applicable to greatly across the seismic hardening of high-bearing capacity building.

Description

Prestressing force buckling restrained brace
Technical field
The utility model relates to the component that a kind of buckling restrained brace outsourcing confined concrete unit is furnished with prestressed cable, prestress wire or prestressing force screw rod, belongs to Construction Anti-earthquake and relates to field.
Background technology
Recent years, buckling restrained brace structure became Aseismic Structure System instantly all the fashion.For effective control structure rigidity, current many design adopts " ductility construction system ", and target is the deformability improving structure, and utilizes the ductility of structure consume energy, and cost is then resist dissipation geological process with part-structure damage.Consider the impact of ductility, frame construction starts more to be paid attention to application, but unbraced frames lateral resistant ability is more weak, thus introduces supporting member.But common support also exists the problem of bending deformation under earthquake comes and goes the tension and compression of effect.Buckling restrained brace, then by the component that imposes restriction to its outside, limits the bending deformation be supported in loading process, to reach the effect of total cross-section surrender.
Buckling restrained brace is when little shake, and the rigidity of dissipative devices, higher than the firm framework of traditional bending resistance, is easy to reach code requirement.Its connected mode mostly is hinged or bolt, can avoid Site Welding and reduce detection difficulty, and installation environmental protection is economical again.Moreover, buckling-restrained bracing member can adjust the Rigidity and strength of structure flexibly, and easily changes after geological process is damaged, and that compares the longer time protects overall structure.The target of setting up defences of " no damage in small earthquake, middle shake can be repaiied, no collapsing with strong earthquake " for reaching further, more multiple-project adopts buckling-restrained bracing member.
Buckling-restrained energy-dissipation mainly forms has internal core steel (steel core), non-cohesive material (or gap) and external constraint component (as concrete filled steel tube etc.) for steel core, be the constraint surrender section of support, require that its ductility is good, yield strength value stabilization.Steel core is the important composition ensureing Member Reliability Analysis.For ensureing that supporting two ends is in elastic stage work all the time, need to increase sectional dimension of members or welding stiffening rib.Certainly, before the non-compliant section of widening, internal reservation space need be set, avoid steel to contact with the direct of cement mortar.And adhesive-less layer is required to be expanding material, to reduce under poisson effect, shearing when steel core constraint surrender section expands and between cement mortar.In geological process, the operating principle of buckling-restrained energy-dissipation is: surrender steel core by core and all bear axial compression and pulling force, and to reach the effect of power consumption, and external constraint unit restriction core cell bends, and reaches the object preventing steel core flexing.The application of this form of structure, improves the problem of the integral rigidity deficiency of conventional support structure system, and effectively improves structure Hysteresis Behavior.
At present, buckling restrained brace external constraint unit overcoat mostly is steel pipe and Combined concrete, when running into greatly across high-bearing capacity design requirement, need enough large cross section just can meet constraint to core steel, and prestressing force buckling restrained brace, be equivalent to original concrete unit precompressed, more effectively play concrete effect of contraction and reduce cracking, namely relative minimizing sectional dimension reduces outsourcing constraint material, ensures structural performance and meets design outward appearance demand, reduces and occupy space.Secondly presstressed reinforcing steel, prestressed cable, prestress wire or prestressing force screw rod can play certain unbending.Be applicable to greatly across the seismic hardening of high-bearing capacity building.Prestressing force buckling restrained brace can adopt pre-tensioning system and post stretching two kinds of method stretch-draw, pre-tensioning system mainly precast yard use, for prefabricated units production can factory batch stretch-draw, be applicable to batch production batch production; Posttension rule uses at the construction field (site), and processing mode is flexible, and degree of prestressing is high.
Utility model content
Patent is intended to relatively reduce greatly across high-bearing capacity supporting section size, there is provided a kind of prestress prepressing concrete buckling restrained brace, its application prestressed cable, prestress wire or prestressing force screw rod are to original concrete unit precompressed, both effectively concrete effect of contraction was played, reduce concrete cracking, namely relative minimizing sectional dimension reduces outsourcing constraint material, ensures again the Hysteresis Behavior of well-formed and meets design outward appearance demand.
A kind of prestressing force buckling restrained brace, be provided with core steel as mainly surrendering component, also have and support peripheral external constraint component, and the set non-cohesive material layer between external constraint component and steel core supporting member, it is characterized in that: external constraint concrete unit is furnished with prestressed cable, prestress wire or prestressing force screw rod, and to concrete precompressed; Be constrained to steel sleeve buckling restrained brace for outsourcing, preferential employing pre-tensioning system stretch-draw and square-section, multiple support can process stretch-draw simultaneously, be convenient to factorial praluction; Be constrained to spiral stirrup buckling restrained brace (author once proposed [patent No.: ZL201320740602.1]) for outsourcing, preferential adopt post stretching stretch-draw and circular cross-section, processing mode is flexible, and degree of prestressing is high and reduce end concrete and come off; Prestressed cable, prestress wire or prestressing force screw rod are configured by design bearing capacity and bearing length and calculate.
The beneficial effect of patent is, this patent can realize namely reducing outsourcing constraint material across the reduction of high-bearing capacity supporting section greatly, and is convenient to batch production batch machining during employing pre-tensioning system, and post stretching can be adopted again to apply in a flexible way.And rigidity is large, intensity is high, is easy to reach code requirement.Its connected mode mostly is hinged or bolt, in-site installation environmental protection and economic.This supporting form not only flexibility ratio is high, easy adjust structure Rigidity and strength, it is replaceable after geological process is damaged, can greatly reduce the duration and reduce steel using amount again, and more lasting guarantee component performance, reliability is high, the target of setting up defences of " no damage in small earthquake, middle shake can be repaiied, no collapsing with strong earthquake " reaching.
Accompanying drawing explanation
Fig. 1 is the steel core of this patent component;
Fig. 2 is this patent component steel core phantom drawing;
Fig. 3 is this patent pre-tensioning system dagger square-section figure;
Fig. 4 is the outsourcing constraint of this patent pre-tensioned members and presstressed reinforcing steel phantom drawing;
Fig. 5 is this patent post stretching dagger circular cross-section figure;
Fig. 6 is the outsourcing constraint of this patent post-tensioned member and presstressed reinforcing steel phantom drawing.
1-cross kernel steel core;
2-non-cohesive material;
3-flexible material;
4-outsourcing retrains;
5-steel pipe sleeve;
6-presstressed reinforcing steel;
7-concrete;
8-is cut cross kernel steel core;
9-outsourcing paper web;
10-spiral stirrup;
11-reinforcing bar;
12-ground tackle.
Detailed description of the invention
Below with reference to the technical scheme of accompanying drawing detailed description this patent.
As Fig. 4, Fig. 6, shown in, this patent component is prestressing force buckling restrained brace, it is made up of internal cruciform (or in-line, I-shaped etc.) core steel core, non-cohesive material, concrete, a few part of outsourcing constraint (steel sleeve or spiral stirrup) and presstressed reinforcing steel (prestressed cable, prestress wire or prestressing force screw rod).Steel core section size is determined by the design of central load power.Concrete is circular cross-section, and adopt mortar or light bone concrete, and maximum aggregate size is less than steel core outer rim to external wrapping concrete spacing, cross section size is determined by calculating such as component bending resistance requirements.
As shown in Figure 3, Figure 4, adopt pre-tensioning system tensioned prestressing bar, mainly use, for the production of prefabricated units in precast yard, tensioned prestressing bar before concreting, and by the presstressed reinforcing steel anchoring temporarily of stretch-draw on pedestal or punching block, then concreting, treats that concrete strength reaches and is not less than 75% of concrete design strength value, when ensureing that presstressed reinforcing steel and concrete have enough bondings, loosen presstressed reinforcing steel, by means of the bonding of concrete and presstressed reinforcing steel, precompression is applied to concrete.Can factory batch stretch-draw, be applicable to batch production batch production.
As Fig. 5, shown in Fig. 6, adopt post stretching tensioned prestressing bar, posttension rule uses at the construction field (site), first make component (concreting), and corresponding duct is reserved by the position of presstressed reinforcing steel in component body, after the concrete strength of component reaches the intensity (being generally not less than 75% of design strength standard value) of regulation, penetrate in reserving hole channel and done antiseptic presstressed reinforcing steel and carry out stretch-draw, and utilize ground tackle that the presstressed reinforcing steel after stretch-draw is anchored at the end of component, rely on the ground tackle of component ends that the prestressing force of presstressed reinforcing steel is passed to concrete, it is made to produce compressive pre-stress, finally in duct, pour into cement paste, make presstressed reinforcing steel and concrete component form entirety.Be applicable to job site flexible processing repacking.

Claims (4)

1. a prestressing force buckling restrained brace, be provided with core steel as mainly surrendering component, also have and support peripheral external constraint component, and the set non-cohesive material layer between external constraint component and steel core supporting member, it is characterized in that: external constraint concrete unit is furnished with prestressed cable, prestress wire or prestressing force screw rod, and to concrete precompressed.
2. a kind of prestressing force buckling restrained brace according to claim 1, is characterized in that: be constrained to steel sleeve buckling restrained brace for outsourcing, preferentially adopts pre-tensioning system stretch-draw, multiple support can process stretch-draw simultaneously, be convenient to factorial praluction.
3. a kind of prestressing force buckling restrained brace according to claim 1, is characterized in that: be constrained to spiral stirrup buckling restrained brace for outsourcing, preferentially adopts post stretching stretch-draw, and processing mode is flexible, and degree of prestressing is high and reduce end concrete and come off.
4. a kind of prestressing force buckling restrained brace according to Claims 2 or 3, is characterized in that: prestressed cable, prestress wire or prestressing force screw rod are configured by design bearing capacity and bearing length and calculate.
CN201420747930.9U 2014-12-04 2014-12-04 Prestressing force buckling restrained brace Expired - Fee Related CN204385941U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420747930.9U CN204385941U (en) 2014-12-04 2014-12-04 Prestressing force buckling restrained brace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420747930.9U CN204385941U (en) 2014-12-04 2014-12-04 Prestressing force buckling restrained brace

Publications (1)

Publication Number Publication Date
CN204385941U true CN204385941U (en) 2015-06-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420747930.9U Expired - Fee Related CN204385941U (en) 2014-12-04 2014-12-04 Prestressing force buckling restrained brace

Country Status (1)

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CN (1) CN204385941U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105040849A (en) * 2015-07-20 2015-11-11 清华大学 Prestressed concrete-filled steel tube buckling-restrained supporting member
CN105155713A (en) * 2015-09-01 2015-12-16 清华大学 Four-limb pre-stressed anti-buckling member connected through wavy webs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105040849A (en) * 2015-07-20 2015-11-11 清华大学 Prestressed concrete-filled steel tube buckling-restrained supporting member
CN105155713A (en) * 2015-09-01 2015-12-16 清华大学 Four-limb pre-stressed anti-buckling member connected through wavy webs

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150610

Termination date: 20151204

EXPY Termination of patent right or utility model