CN105735109B - Bridge pier power consumption and the anti-crushed structure of built-in rod iron damper and viscoelastic material - Google Patents
Bridge pier power consumption and the anti-crushed structure of built-in rod iron damper and viscoelastic material Download PDFInfo
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- CN105735109B CN105735109B CN201610107166.2A CN201610107166A CN105735109B CN 105735109 B CN105735109 B CN 105735109B CN 201610107166 A CN201610107166 A CN 201610107166A CN 105735109 B CN105735109 B CN 105735109B
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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
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Abstract
Bridge pier power consumption and anti-crushed structure the invention discloses a kind of built-in rod iron damper and viscoelastic material.The structure is four sides of coxopodite section respectively two blocks of UHPC plates of arrangement in stem grafting seam section assembling bridge pier vulnerable zone, viscoelastic material layer is set between bridge pier coxopodite section and UHPC plates, apply prestressing force using finish rolling deformed bar and UHPC plates are combined integral with coxopodite section, reserving hole channel between two blocks of UHPC plates, the rod iron damper for placing mild steel plug and circular steel jacketing composition.Prevent the rod iron damper in duct from corrosion occurring using the closely knit property of UHPC structures, rod iron damper and viscoelastic material layer are then used to improve energy dissipation capacity of the stem grafting seam section assembling bridge pier under geological process excitation.Section assembling bridge pier is stitched using present invention treatment stem grafting, can not only ensure that bridge pier has good energy dissipation capacity and prevents coxopodite section from severe crush occurring under geological process excitation, and the quick reparation to bridge pier can be realized by changing UHPC plates, rod iron damper and viscoelastic material layer after shake.
Description
Technical field
The present invention relates to middle highly seismic region bridge rapid construction technology and Seismic Design Method, more particularly to section assembling skill
Art, external prestressing technique and the damper technology using metal material power consumption, belong to field of civil engineering.
Background technology
Stem grafting seam section assembling bridge pier because have rapid construction advantage and self-resetting capability, including port Zhuhai and Macao bridge with
Canadian Federal bridge has obtained engineer applied in across the river bridge spanning the sea of some interior.The bridge pier of this form is by pier shaft edge
Vertically it is divided into some sections, Reinforcement to be disconnected at segmental joints, is connected using " stem grafting seam " between sections, or
Epoxy resin is filled in seam crossing to improve the durability of bridge pier, then connected into sections by the way of post-tensioned prestressing whole
Body.Domestic and foreign scholars by experimental and theoretical study find, stem grafting stitch section assembling bridge pier under seismic stimulation energy dissipation capacity compared with
Difference, and easily coxopodite section crush.
To improve the energy dissipation capacity that stem grafting stitches section assembling bridge pier, at present using most in engineering practice and scientific research
Method be stem grafting seam section assembling bridge pier in built-in power consumption reinforcing bar.Although this method can improve the power consumption energy of bridge pier
Power, but can cause to shake the residual deformation increase of rear abutment simultaneously, while built-in power consumption reinforcing bar is not easy to change after shake.
Hold squashy problem in seismic stimulation bottom sections for stem grafting seam section assembling bridge pier, using most in engineering
Method be to increase coxopodite section concrete constraint to improve the deformability of concrete, being included in coxopodite section concrete increases
Stirrup consumption, using concrete filled steel tube make coxopodite section or in coxopodite section concrete outer wrap FRP, this method really can
Enough mitigate degree of injury of the coxopodite section under seismic stimulation, but the concrete for damaging there is also not easily changeable problem after shake.
The content of the invention
Technical problem：It is an object of the invention to provide a kind of built-in rod iron damper and viscoelastic material bridge pier power consumption with
Anti-crushed structure, stem grafting seam section assembling bridge is improved using the built-in rod iron damper of replaceable UHPC plates and viscoelastic material layer
Pier geological process excitation under energy dissipation capacity and prevent coxopodite section crushing, can not only be improved using the structure stem grafting seam sections
Assembled bridge pier energy dissipation capacity and prevents coxopodite section crushing under seismic stimulation, and can be by changing impaired superelevation after shake
Performance concrete UHPC (Ultra High Performance Concrete, UHPC) plates and wherein built-in rod iron damper
Impaired bridge pier is quickly repaired with viscoelastic material layer, the use function of bridge is recovered in time.
Technical scheme：The present invention is bridge pier power consumption and the anti-crushed knot of a kind of built-in rod iron damper and viscoelastic material
Structure, stem grafting is improved using the built-in rod iron damper of replaceable UHPC plates and viscoelastic material layer and stitches section assembling bridge pier in earthquake
Act on the energy dissipation capacity under encouraging and prevent coxopodite section crushing, outside each arrangement two piece phases of the structure on four sides of bridge pier coxopodite section
The UHPC plates of overlapping, viscoelastic material layer is set between bridge pier coxopodite section outside and UHPC plates, two blocks of UHPC plates being superimposed it
Between reserving hole channel be used for placing the rod iron damper that is made up of mild steel plug and circular steel jacketing；Finish rolling deformed bar is horizontally through
Described UHPC plates and bridge pier coxopodite section, the two ends of finish rolling deformed bar are anchored by high-strength nut and steel plate washer, by finish rolling
Spiral applies prestressing force and described UHPC plates is combined into integral with bridge pier coxopodite section；Described mild steel plug is by band spiral shell
Embedded bar of the steel bushing of line respectively with upper segment and cushion cap is connected；Described bridge pier coxopodite section and UHPC plates is saved with top
Need to set rubber spacer between section, prevent in the case where geological process is encouraged because the collision of coxopodite section causes upper segment to damage, on
Portion's sections will increase wall thickness with coxopodite section seam crossing, be gradually reduced to wall thickness.
Described reserving hole channel diameter is slightly larger than the diameter of circle property steel sleeve.
Described UHPC plates are made using the UHPC for mixing micro steel fiber.
Beneficial effect：Present invention contrast prior art has advantages below：
1. the invention is separated vulnerable zone with protected district using capacity protection principle, is applied using finish rolling deformed bar
Prestressing is integral using the UHPC plates as vulnerable zone and inner bottom sections as protected district, can pass through after shake
Loosening and tensioning again for finish rolling deformed bar, realizes the quick-replaceable to being damaged UHPC plates.
2. vulnerable zone uses UHPC plates, can make full use of the property of " splitting without broken " that UHPC has by mixing of steel fiber
Matter and the corrosion resistant property having because structure is closely knit.
3. viscoelastic material is set between bridge pier coxopodite section and UHPC plates, is ensured in the case where geological process is encouraged by calculating
Only there is less relative displacement between bridge pier coxopodite section and UHPC plates, can be consumed when there is detrusion using viscoelastic material
The operation principle of energy, increases the energy dissipation capacity of bridge pier.
4. two blocks of replaceable UHPC plates, the preformed hole for placing rod iron damper are respectively provided with four sides of bridge pier coxopodite section
Road is arranged between two blocks of UHPC plates, and such way is observed and changed after not only improving shake to rod iron damper, is also had
Beneficial to preventing rod iron damper corrosion.
5. the diameter of rod iron damper will be slightly smaller than the diameter of reserving hole channel, and the upper and lower end of mild steel plug passes through steel bushing
The embedded bar with upper segment and cushion cap is connected respectively, not only improves the replacing to rod iron damper after shaking, and also ensure that core
Rod can be with Free Transform under geological process excitation.
6. need to set rubber spacer between stem grafting seam section assembling bridge pier coxopodite section and UHPC plates and upper segment, prevent ground
Because the collision of coxopodite section causes upper segment to damage under shake effect excitation, the damage that bridge pier may occur is this ensures that thered
Wound only concentrates on replaceable UHPC plates, is conducive to the timely use function of recovering bridge after shake, is that earthquake relief work 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 construction top view；
Label declaration in figure：1- bridge piers coxopodite section, 2-UHPC plates, 3- viscoelastic material layers, 4- reserving hole channels, 5- soft steel cores
Rod, 6- circular steel jacketings, 7- finish rolling deformed bars, 8- high-strength nuts, 9- steel plate washers, 10- steel bushings, 11- upper segments, 12-
Embedded bar, 13- rubber spacers.
Specific embodiment
The present invention is a kind of dry to improve by using the built-in rod iron damper of replaceable UHPC plates and viscoelastic material layer
Energy dissipation capacity of the seam section assembling bridge pier under geological process excitation and the structure for preventing coxopodite section crushing, the structure need to make
With replaceable UHPC plates, viscoelastic material layer, mild steel plug, circular steel jacketing, finish rolling deformed bar, high-strength nut, steel plate washer,
Steel bushing, embedded bar and rubber spacer.
Described replaceable UHPC plates are respectively provided with two pieces, between UHPC plates and bridge pier coxopodite section on four sides of bridge pier coxopodite section
Viscoelastic material layer is set, by cementing connection between viscoelastic material layer and UHPC plates, by rubbing between bridge pier coxopodite section
Power power transmission is wiped, reserving hole channel between two blocks of UHPC plates, the rod iron damper for placing mild steel plug and steel sleeve composition is described
Duct be symmetric with bridge pier center.
Described replaceable UHPC plates are integral by finish rolling deformed bar applying prestressing combination with inner bottom sections, lead to
The thickness for being calculated replaceable UHPC plates is crossed, there is the property of " splitting without broken " using UHPC because of mixing of steel fiber, it is ensured that shake
Afterwards replaceable UHPC plates only there is local damage and will not occurrence of large-area crushing, while inner bottom sections is still remained intact, foot
Enough support top dead loads and connection different segment apply prestressing force, can quick-recovery bridge pier soon by replacing UHPC plates after shake.
Coefficient of friction between described viscoelastic material layer and bridge pier coxopodite section should be less than the friction system between UHPC plates
Number, by applying suitable prestressing force, it is ensured that only occur between bridge pier coxopodite section and UHPC plates under geological process excitation smaller
Relative displacement, viscoelastic material layer can occur detrusion and produce power consumption, not have relative displacement between two blocks of UHPC plates.
Described circular steel jacketing diameter is slightly smaller than the diameter in duct, and the wherein upper and lower end of mild steel plug passes through steel bushing
The embedded bar with upper segment and cushion cap is connected respectively, and stem grafting stitches section assembling bridge pier can be in level under geological process excitation
Wave in direction so that mild steel plug is subject to tension and compression repeatedly and elastic-plastic deformation occurs, and reaches the purpose of power consumption.Wherein rod iron
Steel sleeve in damper plays a part of to prevent mild steel plug from buckling failure, ring type filling between steel sleeve and mild steel plug occurring
Oxygen tree fat.
Duct and rod iron damper in described replaceable UHPC plates are 12.
Stem grafting seam section assembling bridge pier coxopodite section and UHPC plates top need to set rubber spacer, under preventing geological process from encouraging
Because the collision of coxopodite section causes upper segment to damage.Simultaneously upper segment with coxopodite section seam crossing to increase wall thickness,
Be gradually reduced to wall thickness, can so ensured after shake when changing UHPC plates successively, bridge pier remain to effectively by top dead load and
Prestressing force passes to cushion cap.
Carried by using the built-in rod iron damper of replaceable UHPC plates and viscoelastic material layer the invention provides one kind
Energy dissipation capacity of high level cadre's seam section assembling bridge pier under geological process excitation and the method such as Fig. 1 for preventing coxopodite section crushing, should
Method is related to bridge pier coxopodite section 1, UHPC plates 2, viscoelastic material layer 3, reserving hole channel 4, mild steel plug 5, circular steel jacketing 6, essence
Roll spiral 7, high-strength nut 8, steel plate washer 9, steel bushing 10, upper segment 11, embedded bar 12 and rubber spacer 13.It is described
Replaceable UHPC plates in reserving hole channel 4 and rod iron damper be 12.
The process of present invention specific implementation is as follows：
Step 1：Stem grafting seam each sections of section assembling bridge pier is transported to job site, each sections edge on cushion cap from precast plant
It is vertical place in order it is errorless after, the bottom surface of upper segment 11 has bonded rubber spacer 13, by post-tensioned prestressing by each section
Section connection is integral；
Step 2：One block of UHPC plate 2 is sequentially placed on 1 four sides of coxopodite section, viscoelastic material layer 3 has been bonded in precast plant
Such as Fig. 2 on UHPC plates 2；
Step 3：The rod iron damper being made up of mild steel plug 5 and circular steel jacketing 6 is placed on the groove of UHPC plates 2
Place, and be connected with the embedded bar 12 in upper segment 11 and cushion cap respectively by steel bushing 10；
Step 4：Another block of UHPC plate 2 such as Fig. 2 is sequentially placed on 1 four sides of coxopodite section, two blocks of UHPC plates 2 are in reserving hole channel 4
Place's alignment, now rod iron damper is just in reserving hole channel 4；
Step 5：Finish rolling deformed bar 7 is passed through the duct being reserved on coxopodite 1 and UHPC of section plates 2, according to《Highway bridge and culvert
Construction technique normalizing》On the regulation of tensioning finish rolling deformed bar 7 in JTG/TF50-2011, using relevant device to finish rolling spiral shell
Line reinforcing bar 7 applies prestressing force, and it is anchored using high-strength nut 8 and steel plate washer 9.
In the present embodiment, the UHPC plates 2 described in step 2 are made by the UHPC of incorporation micro steel fiber, UHPC plates 2
Thickness, by being calculated, is calculating principle to ensure that inner bottom sections 1 does not occur to damage.
In the present embodiment, reserving hole channel 4 and rod iron damper are 12, preformed hole in the UHPC plates 2 described in step 3
Slightly larger than the diameter of circular steel jacketing 6, when stem grafting seam section assembling bridge pier, occurred level becomes the diameter of road 4 under geological process excitation
During shape, whole rod iron damper can Free Transform, give full play to energy dissipation capacity.
Although as described above, having been represented with reference to specific preferred embodiment and having described the present invention, it must not be explained
It is to the limitation of itself of the invention.Under the premise of the spirit and scope of the present invention for not departing from appended claims definition, can be right
It makes a variety of changes in the form and details.
Claims (3)
1. the bridge pier of a kind of built-in rod iron damper and viscoelastic material consumes energy and anti-crushed structure, it is characterised in that utilizing can
The built-in rod iron damper of UHPC plates and viscoelastic material layer is changed to improve stem grafting seam section assembling bridge pier in geological process excitation
Under energy dissipation capacity and prevent coxopodite section crushing, the structure bridge pier coxopodite section (1) four side outside respectively arrangement two pieces be superimposed
UHPC plates (2), setting viscoelastic material layer (3) between bridge pier coxopodite section (1) outside and UHPC plates (2), two pieces are superimposed
Reserving hole channel (4) is for placing the rod iron damper being made up of mild steel plug (5) and circular steel jacketing (6) between UHPC plates (2)；
Finish rolling deformed bar (7) is horizontally through described UHPC plates (2) and bridge pier coxopodite section (1), and the two ends of finish rolling deformed bar (7) lead to
Cross high-strength nut (8) and steel plate washer (9) anchoring, by finish rolling deformed bar (7) apply prestressing force by described UHPC plates (2) with
Bridge pier coxopodite section (1) combination is integral；Described mild steel plug (5) by threaded steel bushing (10) respectively with upper segment
(11) it is connected with the embedded bar (12) of cushion cap；Between described bridge pier coxopodite section (1) and UHPC plates (2) and upper segment (11)
Rubber spacer (13) need to be set, prevented in the case where geological process is encouraged because the collision of coxopodite section (1) causes upper segment (11) to send out
Raw to damage, upper segment (11) will increase wall thickness with coxopodite section (1) seam crossing, be gradually reduced to wall thickness.
2. the bridge pier of built-in rod iron damper according to claim 1 and viscoelastic material consumes energy and anti-crushed structure, its
It is characterised by, described reserving hole channel (4) diameter is slightly larger than the diameter of circle property steel sleeve (6).
3. the bridge pier of built-in rod iron damper according to claim 1 and viscoelastic material consumes energy and anti-crushed structure, its
It is characterised by, described UHPC plates (2) are made using the UHPC for mixing micro steel fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610107166.2A CN105735109B (en) | 2016-02-26 | 2016-02-26 | Bridge pier power consumption and the anti-crushed structure of built-in rod iron damper and viscoelastic material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610107166.2A CN105735109B (en) | 2016-02-26 | 2016-02-26 | Bridge pier power consumption and the anti-crushed structure of built-in rod iron damper and viscoelastic material |
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| Publication Number | Publication Date |
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| CN105735109A CN105735109A (en) | 2016-07-06 |
| CN105735109B true CN105735109B (en) | 2017-06-16 |
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2016
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| JP2004190254A (en) * | 2002-12-09 | 2004-07-08 | Mitsubishi Heavy Ind Ltd | Base isolating device for bridge pier, and bridge equipped with the same |
| JP2009221695A (en) * | 2008-03-14 | 2009-10-01 | Taisei Corp | Vibration control stud and its construction method |
| CN102304892A (en) * | 2011-07-29 | 2012-01-04 | 清华大学 | External energy-consumption self-resetting bridge pier stud structure system and realization method thereof |
| CN203238803U (en) * | 2013-03-12 | 2013-10-16 | 同济大学 | Novel mixed energy-dissipation shock-absorption support |
| CN103147391A (en) * | 2013-03-29 | 2013-06-12 | 东南大学 | Corrosion-resistant self-centering bridge pier structure easy for seismic rehabilitation |
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