CN105603870A - Pier energy-consuming and crush prevention structure internally provided with energy-consuming rebars and sticky elastic material layers - Google Patents

Pier energy-consuming and crush prevention structure internally provided with energy-consuming rebars and sticky elastic material layers Download PDF

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Publication number
CN105603870A
CN105603870A CN201610107842.6A CN201610107842A CN105603870A CN 105603870 A CN105603870 A CN 105603870A CN 201610107842 A CN201610107842 A CN 201610107842A CN 105603870 A CN105603870 A CN 105603870A
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China
Prior art keywords
uhpc
consuming
energy
bridge pier
power consumption
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CN201610107842.6A
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CN105603870B (en
Inventor
王景全
王震
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Southeast University
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Southeast University
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/02—Piers; Abutments ; Protecting same against drifting ice
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced
    • E01D2101/262—Concrete reinforced with steel fibres
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced
    • E01D2101/28—Concrete reinforced prestressed

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention discloses a pier energy-consuming and crush prevention structure internally provided with energy-consuming rebars and sticky elastic material layers. According to the structure, dry joint section splicing pier vulnerable areas, that is, the four sides of the a bottom section are each provided with two Ultra High Performance Concrete (UHPC) boards, one sticky elastic material layer is arranged between each pier bottom section and the corresponding UHPC board, finish rolled rebars are utilized to apply prestress to combine the UHPC boards and the bottom section into a whole, and pore passages are reserved between the UHPC boards and used for containing the energy-consuming rebars. According to the pier energy-consuming and crush prevention structure internally provided with the energy-consuming rebars and the sticky elastic material layers, the internal bottom section is prevented from being crushed under the excitation of earthquake action due to the fact that the UHPC doped with steel fibers has the advantage that the UHPC is cracked but not broken, and the energy-consuming rebars in the pore passages are prevented from rusting due to the fact that the UHPC structure is dense; meanwhile, the UHPC around holes can be prevented from being destroyed due to buckling when the energy-consuming rebars are pressed, and the energy-consuming rebars and the sticky elastic material layers are used for improving the energy-consuming capacity of a dry joint section splicing pier under the excitation of the earthquake action.

Description

Bridge pier power consumption and the anti-crush texture of built-in power consumption reinforcing bar and viscoelastic material layer
Technical field
The present invention relates to middle highly seismic region bridge rapid construction technology and Seismic Design Method, particularly section assembling skillArt, external prestressing technology and the damper technology of utilizing metal material to consume energy, belong to field of civil engineering.
Background technology
Stem grafting seam section assembling bridge pier is because of having advantage and the self-resetting capability of rapid construction, comprise port Zhuhai and Macao bridge withCanada's Confederation Bridge has obtained engineering application in interior some in across river bridge spanning the sea. The bridge pier of this form is by pierBody is along being vertically divided into some sections, and Reinforcement disconnects at segmental joints place, adopts " stem grafting seam " between sectionsConnect, or improve the durability of bridge pier at seam crossing filling epoxy resin, then adopt the mode of post-tensioned prestressingSections is connected into entirety. Chinese scholars is by test and theoretical research discovery, and stem grafting seam section assembling bridge pier is on groundIt is poor that shock excitation is encouraged lower energy dissipation capacity, and easily crush in coxopodite section.
For improving the energy dissipation capacity of stem grafting seam section assembling bridge pier, in engineering practice and scientific research, use at most at presentMethod be built-in power consumption reinforcing bar in stem grafting seam section assembling bridge pier. Although this method can improve the power consumption of bridge pierAbility, but can cause the residual deformation of shaking rear abutment to increase simultaneously, simultaneously built-in power consumption reinforcing bar is also difficult for more after shakeChange.
Hold squashy problem for stem grafting seam section assembling bridge pier at the seismic stimulation sections of going to the bottom, in engineering, application at mostMethod be to coxopodite section concrete increase constraint improve concrete deformability, be included in coxopodite section concreteIncrease stirrup consumption, use concrete filled steel tube to make coxopodite section or at coxopodite section concrete outer wrap FRP, thisMethod can alleviate the degree of injury of coxopodite section under seismic stimulation really, but the concrete of damage is difficult for after also there is shakeThe problem of changing.
Summary of the invention
Technical problem: the bridge pier power consumption that the object of this invention is to provide a kind of built-in power consumption reinforcing bar and viscoelastic material layer withAnti-crush texture, utilizes the built-in power consumption reinforcing bar of replaceable UHPC plate to improve stem grafting seam section assembling bridge pier and does in earthquakeWith the energy dissipation capacity under excitation and the crushing of anti-crushing coxopodite section, use this structure not only can improve stem grafting seam sections and spellDress bridge pier energy dissipation capacity and prevent that coxopodite section from crushing under seismic stimulation, and can be by changing impaired in shake afterwardsUHPC plate and wherein built-in power consumption reinforcing bar and viscoelastic material layer are repaired impaired bridge pier fast, recover in time bridgeUse function.
Technical scheme: the present invention is the bridge pier power consumption and anti-crushing knot of a kind of built-in power consumption reinforcing bar and viscoelastic material layerStructure, this structure is at bridge pier coxopodite section four each two blocks of UHPC plates that are superimposed, bridge pier coxopodite section and the UHPC of arranging in outside, limitViscoelastic material layer is set between plate, and between two blocks of UHPC plates, reserving hole channel is used for placing power consumption reinforcing bar; Finish rolling screw threadReinforcing bar is horizontally through bridge pier coxopodite section and UHPC plate, and the two ends of finish rolling deformed bar are respectively by high-strength nut and steel padSheet anchoring, described UHPC plate and bridge pier coxopodite section apply prestressing force by finish rolling deformed bar and both are combined into wholeBody; Described power consumption reinforcing bar is connected with the embedded bar of upper segment and cushion cap respectively by threaded steel bushing; InstituteBetween the bridge pier coxopodite section of stating and UHPC plate and upper segment, need to arrange rubber spacer, prevent under geological process excitationBecause the collision of bridge pier coxopodite section causes upper segment to damage, upper segment will increase with bridge pier coxopodite section seam crossingAdd wall thickness, reduce gradually to wall thickness.
Described reserving hole channel slightly larger in diameter is in the diameter of power consumption reinforcing bar.
Described UHPC plate uses the UHPC that mixes micro steel fiber to make,
Beneficial effect: the present invention contrasts prior art and has the following advantages:
1. this invention adopts capacity protection principle that vulnerable zone is separated with protected district, utilizes finish rolling deformed bar to executePrestressing using as the UHPC plate of vulnerable zone be combined into entirety as the inner bottom sections in protected district, can shakeBy the loosening and stretch-draw again of finish rolling deformed bar, realize quick-replaceable to impaired UHPC plate afterwards.
2. vulnerable zone adopts UHPC plate, can make full use of UHPC because of " splitting not that mixing of steel fiber hasBroken " character and the corrosion resistant character having because structure is closely knit.
3. between bridge pier coxopodite section and UHPC plate, viscoelastic material layer is set, ensures in geological process by calculatingUnder excitation, only between bridge pier coxopodite section and UHPC plate, there is less relative displacement, utilize viscoelastic material to shearThe operation principle that can consume energy when distortion, increases the energy dissipation capacity of bridge pier, simultaneously viscoelastic material layer only with UHPC plateCementing, without bonding, change afterwards UHPC plate and just realized the replacement of viscoelastic material layer with bridge pier coxopodite section in shake.
4. on bridge pier coxopodite section four limits, two blocks of replaceable UHPC plates are set respectively, for placing the reserved of power consumption reinforcing barDuct is arranged between two blocks of UHPC plates, such way be both conducive to shake after to power consumption reinforcing bar observed with moreChange, be also conducive to prevent the steel bar corrosion that consumes energy, when duct UHPC around can prevent from consuming energy reinforcing bar pressurized, occur simultaneouslyBuckling failure.
5. the diameter of power consumption reinforcing bar will be slightly smaller than the diameter of reserving hole channel, and the upper and lower end of power consumption reinforcing bar divides by steel bushingBe not connected with the embedded bar of upper segment and cushion cap, be both conducive to the replacing to rod iron damper after shaking, ensured yetPlug can Free Transform under geological process excitation.
6. between stem grafting seam section assembling bridge pier coxopodite section and UHPC plate and upper segment, need to arrange rubber spacer, anti-Only under geological process excitation, damage because the collision of coxopodite section causes upper segment, so just ensured that bridge pier mayThe damage occurring only concentrates on removable UHPC plate, is conducive to the rear use function of recovering in time bridge of shake, for anti-The shake disaster relief gains time.
Brief description of the drawings
Fig. 1 is embodiment of the present invention structural section;
Fig. 2 is embodiment of the present invention structure top view;
Number in the figure explanation: 1-bridge pier coxopodite section, 2-UHPC plate, 3-viscoelastic material layer, 4-reserving hole, 5-Power consumption reinforcing bar, 6-finish rolling deformed bar, 7-high-strength nut, 8-steel plate washer, 9-steel bushing, 10-upper segment, 11-Embedded bar, 12-rubber spacer.
Detailed description of the invention
The present invention is a kind of by utilizing the built-in power consumption reinforcing bar of replaceable UHPC plate and viscoelastic material layer to improve dryThe energy dissipation capacity of seam section assembling bridge pier under geological process excitation and the structure that prevents that coxopodite section from crushing, this structure needsUse replaceable UHPC plate, viscoelastic material layer, power consumption reinforcing bar, finish rolling deformed bar, high-strength nut, steel padSheet, steel bushing, embedded bar and rubber spacer.
Described replaceable UHPC plate arranges respectively two on bridge pier coxopodite section four limits, UHPC plate and bridge pier coxopodite sectionBetween viscoelastic material layer is set, between viscoelastic material layer and UHPC plate, be connected by cementing, with bridge pier coxopodite sectionBetween by frictional force power transmission, reserving hole channel between two blocks of UHPC plates, for placing power consumption reinforcing bar, described ductBe symmetric with bridge pier center.
Described replaceable UHPC plate applies prestressing combination with inner bottom sections by finish rolling deformed bar and becomes entirety,By calculating the thickness of replaceable UHPC plate, utilize UHPC to there is " splitting not broken " because of mixing of steel fiberCharacter, ensure after shake that local damage only occurs replaceable UHPC plate and unlikely occurrence of large-area crushes, simultaneously innerCoxopodite section still remains intact, and enough supports top dead load and is connected prestressing force that different segment applies, by shaking rear replacingUHPC plate is quick-recovery bridge pier soon.
Coefficient of friction between described viscoelastic material layer and bridge pier coxopodite section should be less than the friction between UHPC plateCoefficient, by applying suitable prestressing force, ensures under geological process excitation only between bridge pier coxopodite section and UHPC plateLess relative displacement occurs, and can there is detrusion and produce power consumption in viscoelastic material layer, two blocks of UHPC plates itBetween there is no relative displacement.
Described power consumption bar diameter is slightly smaller than the diameter in duct, wherein consumes the upper and lower end of reinforcing bar and distinguishes by steel bushingBe connected with the embedded bar of upper segment and cushion cap, stem grafting seam section assembling bridge pier can be in level under geological process excitationDirection is waved, and makes mild steel plug be subject to tension and compression repeatedly and elastic-plastic deformation occurs, and reaches the object of power consumption. ItsMiddle reserving hole channel UHPC around plays the effect of the reinforcing bar generation buckling failure that prevents from consuming energy, and hole diameter is a bit larger tham consumptionEnergy bar diameter, for power consumption reinforcing bar is subject to compression swelling headspace.
Duct in described replaceable UHPC plate and power consumption reinforcing bar are 20.
Between stem grafting seam section assembling bridge pier coxopodite section and UHPC plate and upper segment, need to arrange rubber spacer, prevent groundUnder shake effect excitation, because causing upper segment, the collision of coxopodite section damages. Upper segment with coxopodite section seam crossingIncrease wall thickness, reduce gradually to wall thickness, while changing successively UHPC plate after can ensureing like this to shake, bridge pier still canEffectively top dead load and prestressing force are passed to cushion cap.
The concrete process of implementing of the present invention is as follows:
Step 1: stem grafting is stitched to the each sections of section assembling bridge pier and be transported to job site from precast plant, each sections is on cushion capAlong vertically place in order errorless after, the upper segment 10 bottom surfaces rubber spacer 12 that bondd, in advance should by posttensionEach sections is connected into entirety by power;
Step 2: place successively a UHPC plate 2 on coxopodite section 1 four limits, viscoelastic material layer 3 is in precast plantBe bonded on UHPC plate 2 as Fig. 2;
Step 3: power consumption reinforcing bar 5 is placed on to the groove of UHPC plate 2, and by steel bushing 9 respectively with topSections 10 is connected with the embedded bar 11 in cushion cap;
Step 4: place successively another piece UHPC plate 2 as Fig. 2 on bridge pier coxopodite section 1 four limits, two blocks of UHPC plates2 in reserving hole channel 4 places alignment, and the reinforcing bar 5 that now consumes energy is just in reserving hole channel 4;
Step 5: finish rolling deformed bar 6, through the duct being reserved on bridge pier coxopodite section 1 and UHPC plate 2, is pressedAccording to the regulation about stretch-draw finish rolling deformed bar 6 in " highway bridge and culvert construction technique normalizing " JTG/TF50-2011, profitFinish rolling deformed bar 6 is applied to prestressing force with relevant device, and use high-strength nut 7 and steel plate washer 8 to its anchoring.
In the present embodiment, the UHPC plate 2 described in step 2 is made by the UHPC that mixes micro steel fiber,UHPC plate 2 thickness are by calculating, to ensure that inner bottom sections 1 damage does not occur as calculating principle.
In the present embodiment, the coefficient of friction between the viscoelastic material layer 3 described in step 2 and bridge pier coxopodite section 1 shouldBe less than the coefficient of friction between UHPC plate 2, ensure under geological process excitation only bridge pier coxopodite section 1 and UHPCLess relative displacement occurs between plate 2, can there is detrusion and produce power consumption, two in viscoelastic material layer 3Between UHPC plate 2, there is no relative displacement.
In the present embodiment, in the UHPC plate 2 described in step 3, reserving hole channel 4 and power consumption reinforcing bar 5 are 20,Reserving hole channel 4 slightly larger in diameter are in the diameter of power consumption reinforcing bar 5, when stem grafting seam section assembling bridge pier is under geological process excitationIn occurred level when distortion,, whole power consumption reinforcing bar 5 can Free Transform, gives full play to energy dissipation capacity.
As mentioned above, although represented and explained the present invention with reference to specific preferred embodiment, it must not be explainedFor the restriction to the present invention self. Do not departing under the spirit and scope of the present invention prerequisite of claims definition,Can make a variety of changes in the form and details it.

Claims (3)

1. the power consumption of the bridge pier of built-in power consumption reinforcing bar and viscoelastic material layer and an anti-crush texture, is characterized in that,This structure is in bridge pier coxopodite section (1) four each two blocks of UHPC plates (2) that are superimposed, the bridge pier coxopodite section of arranging in outside, limitAnd viscoelastic material layer (3), preformed hole between two blocks of UHPC plates (2) be set between UHPC plate (2) (1)Road (4) is used for placing power consumption reinforcing bar (5); Finish rolling deformed bar (6) is horizontally through bridge pier coxopodite section (1) and UHPCPlate (2), high-strength nut (7) and steel plate washer (8) anchoring, institute are passed through respectively in the two ends of finish rolling deformed bar (6)The UHPC plate (2) of stating applies prestressing force by both groups with bridge pier coxopodite section (1) by finish rolling deformed bar (6)Synthetic entirety; Described power consumption reinforcing bar (5) by threaded steel bushing (9) respectively with upper segment (10) andThe embedded bar (11) of cushion cap is connected; Described bridge pier coxopodite section (1) and UHPC plate (2) and upper segment (10)Between need to arrange rubber spacer (12), prevent under geological process excitation because the collision of bridge pier coxopodite section (1) causesUpper segment (10) is damaged, and upper segment (10) will increase wall thickness with bridge pier coxopodite section (1) seam crossing,Reduce gradually to wall thickness.
2. the power consumption of the bridge pier of built-in power consumption reinforcing bar according to claim 1 and viscoelastic material layer and anti-crushing knotStructure, is characterized in that described reserving hole channel (4) slightly larger in diameter is in the diameter of power consumption reinforcing bar (5).
3. the power consumption of the bridge pier of built-in power consumption reinforcing bar according to claim 1 and viscoelastic material layer and anti-crushing knotStructure, is characterized in that, described UHPC plate (2) uses the UHPC that mixes micro steel fiber to make.
CN201610107842.6A 2016-02-26 2016-02-26 The bridge pier power consumption of built-in power consumption reinforcing bar and viscoelastic material layer and anti-crushed structure Active CN105603870B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106192729A (en) * 2016-07-14 2016-12-07 东南大学 Precast assembly bridge pier core shape joggle structure and construction method
CN111335146A (en) * 2020-03-10 2020-06-26 青岛理工大学 Frame type replaceable buckling-restrained damping energy dissipation device and using method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10169095A (en) * 1996-12-09 1998-06-23 Sekisui House Ltd Post with built-in aseismatic damper and rigid-frame structure skeleton with aseismatic post
CN202116975U (en) * 2011-05-17 2012-01-18 中国地震局工程力学研究所 Subsection prefabrication casing wall for steel fiber concrete
CN102409606A (en) * 2011-07-29 2012-04-11 清华大学 Self-resetting pier column structural system with built-in energy dissipation assembly and implementing method for self-resetting piper column structural system
CN102587578A (en) * 2012-03-21 2012-07-18 河南理工大学 High-strength steel bar enhanced engineered cementitious composites (ECC)-hollow steel pipe ultra high performance concrete (UHPC) combination column member and manufacturing method thereof
CN104847052A (en) * 2015-04-29 2015-08-19 华侨大学 Earthquake damage replaceable combination column structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10169095A (en) * 1996-12-09 1998-06-23 Sekisui House Ltd Post with built-in aseismatic damper and rigid-frame structure skeleton with aseismatic post
CN202116975U (en) * 2011-05-17 2012-01-18 中国地震局工程力学研究所 Subsection prefabrication casing wall for steel fiber concrete
CN102409606A (en) * 2011-07-29 2012-04-11 清华大学 Self-resetting pier column structural system with built-in energy dissipation assembly and implementing method for self-resetting piper column structural system
CN102587578A (en) * 2012-03-21 2012-07-18 河南理工大学 High-strength steel bar enhanced engineered cementitious composites (ECC)-hollow steel pipe ultra high performance concrete (UHPC) combination column member and manufacturing method thereof
CN104847052A (en) * 2015-04-29 2015-08-19 华侨大学 Earthquake damage replaceable combination column structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106192729A (en) * 2016-07-14 2016-12-07 东南大学 Precast assembly bridge pier core shape joggle structure and construction method
CN106192729B (en) * 2016-07-14 2017-10-20 东南大学 Precast assembly bridge pier core shape joggle head structure and construction method
CN111335146A (en) * 2020-03-10 2020-06-26 青岛理工大学 Frame type replaceable buckling-restrained damping energy dissipation device and using method thereof

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