CN104963280A - Novel circular steel tube bridge pier - Google Patents
Novel circular steel tube bridge pier Download PDFInfo
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- CN104963280A CN104963280A CN201510357229.5A CN201510357229A CN104963280A CN 104963280 A CN104963280 A CN 104963280A CN 201510357229 A CN201510357229 A CN 201510357229A CN 104963280 A CN104963280 A CN 104963280A
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Abstract
The invention discloses a novel circular steel tube bridge pier, comprising a circular steel tube bridge pier body, a transverse partition, a buckling-restrained energy dissipation shell and a baseplate which are sequentially welded and fixed together from top to bottom. The buckling-restrained energy dissipation shell comprises a plurality of high-strength steel curved plates and a plurality of low-yield-point steel curved plates; the high-strength steel curved plates and the low-yield-point steel curved plates are alternatively distributed to define the buckling-restrained energy dissipation shell, and the outer surfaces of the low-yield-point steel curved plates are tangent to the outer surfaces of the high-strength steel curved plates; an inner restraining curved steel plate and an outer restraining curved steel plate are fixedly locked to the inner and outer sides of each low-yield-point steel curved plate; the radii of the inner and outer restraining curved steel plates are identical with those of the low-yield-point steel curved plates. The circular steel tube bridge pier has good earthquake resistant performances, can be detected and repaired rapidly after earthquakes, and can be conveniently popularized and applied in the practical engineering.
Description
Technical field
The present invention relates to field of civil engineering steel bridge pier energy-dissipation structure form, specifically refer to that a kind of root arranges the round steel pipe bridge pier of anti-buckling energy-consumption housing, belong to steel bridge pier technical field in bridge engineering.
Background technology
Domestic and international all previous earthquake experience shows, bridge is rapid wear under geological process.Bridge pier is the major bearing structures of bridge construction, and whether it damages and play a part very important to the damage of bridge construction entirety and even destruction.The heavy damage of bridge pier may cause collapsing of bridge, and is difficult to repair use in time after shake, and after giving shake, rescue and relief work makes troubles, and the loss caused is often very huge.
Present stage, bridge pier both domestic and external generally all adopts reinforced concrete structure form, and the bridge pier compressive property of this form is good, but ductility is poor, all subjects to severe risks of damage in all previous earthquake.The destruction of concrete pier mainly comes from the defect of design and structure two aspect: 1) bridge pier bending resistance design is not enough, mainly horizontal restrain hooping bars layout deficiency etc.; 2) Pier Design shear strength is not enough, causes shear failure prior to the bending failure of ductility.In order to make up the defect of reinforced concrete bridge pier, improving the anti-seismic performance of bridge, in some earthquake prone areas, as the Taiwan of the U.S., Japan and China, having gradually adopted steel bridge pier as bottom bracing structure.Compared with reinforced concrete bridge pier, steel bridge pier not only has good anti-seismic performance, also has from heavy and light, takes up an area less, quick construction is convenient, shakes the advantages such as rear easily reparation.Exploring in new bridge pier structure form process, round steel pipe bridge pier all has good anti-bending strength in all directions, has the advantages such as anti-pressure ability is strong, appearance looks elegant, has become quite one of form of structure having development potentiality.But easily there is cripling distortion in round steel pipe bridge pier root coverboard in actual seismic, causes the ductility of round steel pipe bridge pier and energy dissipation capacity sharply to worsen.
Energy-dissipating and shock-absorbing technology is a kind of effective, safe, economic engineering cushion technique, and this technology is day by day ripe, is a kind of seismic measures having development prospect.The mechanics feature of Low Yield Point Steel is that yield strength is low, and yield strain is little, intensity stabilization, and deformability is strong.Low Yield Point Steel has very strong energy dissipation capacity, and has very long low all cycle fatigue lifes, the advantages such as solderability is good.Repair during the energy-dissipating device made with low-yield steel can reduce after shake, and the damage that significantly can reduce the lower structure of large shake.Therefore the application of Low Yield Point Steel becomes the important channel strengthening malformation power consumption.China is used for the Low Yield Point Steel in building aseismicity field, and now having developed yield strength is 100MPa, 160MPa, 225MPa tri-kinds of ranks.This provides necessary material base condition for China carries out Low Yield Point Steel in the application study of architectural energy consumption field of shock absorption.
Summary of the invention
The object of the present invention is to provide the Novel circular steel cylinder pier that a kind of anti-seismic performance is good, be convenient to shake rear damage check and reparation fast.
To achieve these goals, the present invention adopts following technical scheme:
A kind of Novel circular steel cylinder pier, comprises from top to bottom solid welding successively round steel pipe bridge pier body, diaphragm, anti-buckling energy-consumption housing and base plate together; The profile of above-mentioned anti-buckling energy-consumption housing is the hollow cylindrical matched with the shape of above-mentioned round steel pipe bridge pier body, above-mentioned anti-buckling energy-consumption housing comprises some pieces of high-strength steel arcs and some pieces of Low Yield Point Steel arcs, above-mentioned high-strength steel arc and above-mentioned Low Yield Point Steel arc are alternately distributed and surround above-mentioned anti-buckling energy-consumption housing, be detachably connected between above-mentioned Low Yield Point Steel arc and above-mentioned high-strength steel arc, and the external surface of the external surface of above-mentioned Low Yield Point Steel arc and above-mentioned high-strength steel arc is tangent; The inside and outside both sides of each above-mentioned Low Yield Point Steel arc also lock respectively and have interior constraint curved plate and outer constraint curved plate, and the radian of above-mentioned inside and outside constraint curved plate is identical with the radian of above-mentioned Low Yield Point Steel arc.
The height of above-mentioned high-strength steel arc is 1.0-1.2 times of above-mentioned round steel pipe bridge pier body cross-section diameter; The cross-sectional arc length of above-mentioned high-strength steel arc is 1/8 of above-mentioned round steel pipe bridge pier body cross-section girth; The thickness t of above-mentioned high-strength steel arc
high=2f
generalt
general/ f
high, in formula, f
generalfor the yield strength of the wallboard of above-mentioned round steel pipe bridge pier body; t
generalfor the thickness of the wallboard of above-mentioned round steel pipe bridge pier body; f
highfor the material yield strength of above-mentioned high-strength steel arc.
The cross-sectional arc length of above-mentioned Low Yield Point Steel arc is 1/8 of above-mentioned round steel pipe bridge pier body cross-section girth, above-mentioned Low Yield Point Steel arc and all leave 20mm-30mm distance between above-mentioned diaphragm and bridge pier infrastructure end face.
High-strength friction-type is adopted to be bolted together between above-mentioned Low Yield Point Steel arc and above-mentioned high-strength steel arc; Or, above-mentioned Low Yield Point Steel arc, above-mentioned interior constraint curved plate, between above-mentioned outer constraint curved plate and above-mentioned high-strength steel arc, adopt high-strength friction-type to be bolted together.
Be connected by the bolt or pre-stressed bolt penetrating three between above-mentioned Low Yield Point Steel arc with above-mentioned inside and outside constraint curved plate; Above-mentioned inside and outside constraint curved plate has ellipse hole so that bolt passes and has enough slipping space.
After adopting such scheme, the present invention has the following advantages and good effect:
(1) mechanical properties of materials of high-strength steel is given full play to.High-strength steel arc has larger extreme elastic strain value, for the surrender power consumption of Low Yield Point Steel arc is given security; And high-strength steel arc plays stress frame effect, enough supporting capacitys and rigidity can be provided.
(2) lateral deflection of cutting giving full play to Low Yield Point Steel takes energy dissipation capacity.The form of arc constraint steel plate is added by both side surface inside and outside Low Yield Point Steel arc, can effectively prevent thin-walled Low Yield Point Steel arc to bend flexing, form rational force area lattice, give full play to Low Yield Point Steel arc and cut lateral deflection and take energy dissipation capacity.
(3) can the anti-seismic performance of detecting appraisal round steel pipe bridge pier fast after shake, the shock resistance of rapid renovation reinforced round steel pipe bridge pier, guarantee to keep unimpeded as the bridge of lifeline engineering, to shake, emergency relief and post-disaster reconstruction have most important effect afterwards.
(4) construction period is short, quick construction.The each parts of round steel pipe bridge pier, comprise Low Yield Point Steel arc, diaphragm etc. all can in factory processing and fabricating, scene only need lifting.For the section that Forecast of Urban Traffic Flow is large, adopt this round steel pipe bridge pier can significantly shorten the traffic control time, also greatly can accelerate the road rehabilitation speed after earthquake and burst accident.
(5) Novel circular steel cylinder pier provided by the invention has the advantages such as anti-seismic performance is good, ductility is high, energy dissipation capacity is strong.
Accompanying drawing explanation
Fig. 1 is the elevational schematic view of Novel circular steel cylinder pier of the present invention.
Fig. 2 is the cross sectional representation of the first structure of anti-buckling energy-consumption housing in the present invention.
Fig. 3 is the connection diagram of Low Yield Point Steel arc and inside and outside constraint curved plate in the present invention.
Fig. 4 is the structural representation of diaphragm in the present invention.
Fig. 5 is the structural representation of base plate in the present invention.
Fig. 6 is the cross sectional representation of anti-buckling energy-consumption housing the second structure in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
The invention provides a kind of Novel circular steel cylinder pier, as shown in Figure 1, comprise from top to bottom solid welding successively round steel pipe bridge pier body 100, diaphragm 200, anti-buckling energy-consumption housing 300 and base plate 400 together.
The profile of anti-buckling energy-consumption housing 300 is the hollow cylindrical matched with the shape of round steel pipe bridge pier body 100, diaphragm 200 is the circular slab matched with round steel pipe bridge pier body 100 profile, round steel pipe bridge pier body 100 and anti-buckling energy-consumption housing 300 pass through together with diaphragm 200 solid welding, diaphragm 200 can ensure that round steel pipe bridge pier body 100 and anti-buckling energy-consumption housing 300 power transmission are smooth and easy, forms the effect of overall common opposing external loads; For alleviating deadweight and stage repair and maintenance easy to use, as shown in Figure 4, in the middle of diaphragm 200, circular opening 21 is set.
As shown in Figure 2, anti-buckling energy-consumption housing 300 comprises some pieces of high-strength steel arcs 31 and some pieces of Low Yield Point Steel arcs 32, and each high-strength steel arc 31 is alternately distributed with each Low Yield Point Steel arc 32 the anti-buckling energy-consumption housing 300 surrounding hollow cylindrical.Low Yield Point Steel arc 32 and high-strength steel arc 31 are detachably connected, and the external surface of the external surface of Low Yield Point Steel arc 32 and high-strength steel arc 31 is tangent.Particularly: the short transverse both side ends of high-strength steel arc 31 lateral wall is arranged with respectively along Low Yield Point Steel arc 32 extends, and being stacked at interior installation depression for the side end of Low Yield Point Steel arc 32, the side end of Low Yield Point Steel arc 32 is locked in this installation depression by some high-strength friction-type connection bolts 500.Connecting bolt 500 is made up of screw rod, nut, steel plate washer, for preventing connecting bolt in Long-Time Service process from loosening, adopts double nut type of attachment.
The height of high-strength steel arc 31 is 1.0-1.2 times of round steel pipe bridge pier body 100 cross-sectional diameter; The cross-sectional arc length of high-strength steel arc 31 is 1/8 of round steel pipe bridge pier body 100 section girth; The thickness t of high-strength steel arc 31
high=2f
generalt
general/ f
high, in formula, f
generalfor the yield strength of the wallboard of round steel pipe bridge pier body 100; t
generalfor the thickness of the wallboard of round steel pipe bridge pier body 100; f
highfor the material yield strength (adopting 390MPa, 420MPa or 460MPa) of high-strength steel arc 31.
The material of Low Yield Point Steel arc 32 is Low Yield Point Steel, and yield strength is 100MPa, 160MPa or 225MPa.The cross-sectional arc length of Low Yield Point Steel arc 32 is 1/8 of round steel pipe bridge pier body 100 section girth, the top of high-strength steel arc 31 together with the soffit solid welding of diaphragm 200, bottom together with base plate 400 solid welding, Low Yield Point Steel arc 32 and all leave 20mm-30mm distance between diaphragm 200 and bridge pier infrastructure 700 end face.
As Figure 2-3, the inside and outside both sides of each Low Yield Point Steel arc 32 also lock respectively and have interior constraint curved plate 33 and outer constraint curved plate 34, interior constraint curved plate 33 is identical with outer constraint curved plate 34 thickness, the radian of inside and outside constraint curved plate 33,34 is identical with the radian of Low Yield Point Steel arc 32, and bolt or pre-stressed bolt 600 by penetrating three between Low Yield Point Steel arc 32 with inside and outside constraint curved plate 33,34 are connected; Inside and outside constraint curved plate 33,34 has ellipse hole so that bolt passes and has enough slipping space.In the present invention, the first structure of anti-buckling energy-consumption housing 300 as shown in Figure 2, the size of inside and outside constraint curved plate 33,34 is less than the size of Low Yield Point Steel arc 32, and the edge of its end and Low Yield Point Steel arc 32 or and the pad of connecting bolt 500 between distance be 10mm ~ 20mm.
In the present invention, Low Yield Point Steel arc 32, interior constraint curved plate 33, outer constraint curved plate 33 three as shown in Figure 6, are connected with high-strength steel arc 31 by bolt by the another kind of structure of anti-buckling energy-consumption housing 300 jointly.In this case, the size of inside and outside constraint curved plate 33,34 is identical with Low Yield Point Steel arc 32, and its end is concordant with Low Yield Point Steel arc 32 edge.
In the present embodiment, high-strength steel arc 31 and each four pieces of Low Yield Point Steel arc 32, four pieces of high-strength steel arcs 31 play stress frame effect, can provide enough supporting capacitys and rigidity, and its extreme elastic strain value is comparatively large, can ensure that Low Yield Point Steel arc 32 surrenders power consumption.Four pieces of Low Yield Point Steel arcs 32 are for mainly to surrender energy-consuming parts, after inside and outside constraint curved plate 33,34 is set up to the Low Yield Point Steel arc 32 of this thin-walled, its out-of plane bending bending deformation can be suppressed, it is the moulding surrender power consumption of total cross-section, ensure that it cuts the power consumption of lateral deflection clothes, after bridge pier is destroyed, can ensure that bridge pier root outward appearance is without large change.Therefore, round steel pipe bridge pier ductility of the present invention is good, energy dissipation capacity strong, excellent earthquake resistance; The anti-seismic performance of the rear round steel pipe bridge pier of shake can be evaluated rapidly by the surrender situation detecting four pieces of Low Yield Point Steel arcs 32, and its shock resistance can be repaired fast after changing anti-buckling energy-consumption housing 300.
In the present invention, according to different design needs, anti-buckling energy-consumption housing 300 can be divided into the large shake anti-buckling energy-consumption housing of slippage and the anti-buckling energy-consumption housing two kinds of complete slippage.
For the anti-buckling energy-consumption housing of large shake slippage, bolt applies certain pretension, certain thrust is produced between inside and outside constraint curved plate and Low Yield Point Steel arc, can ensure that Low Yield Point Steel arc cripling does not occur under little shake effect, and jointly stressed by contact friction with Low Yield Point Steel arc, powerful out of plane constraint effect is provided; Under large shake effect, the internal force difference between Low Yield Point Steel arc and inside and outside constraint curved plate exceedes the frictional force between them, will produce relative sliding; When in the middle of ensureing, out-of-plane buckling does not occur Low Yield Point Steel arc, Low Yield Point Steel arc gives full play to power consumption effect.
For the anti-buckling energy-consumption housing of complete slippage, bolt is Shi Hanzhang not; Under little shake and large shake effect, all can slippage between inside and outside constraint curved plate and Low Yield Point Steel arc, inside and outside constraint curved plate only provides out of plane constraint to Low Yield Point Steel arc, not stressed in scope of participants; Low Yield Point Steel arc provides in-plane stiffness and energy dissipation capacity.
As shown in Figure 5, base plate 400 is circular slab, and its periphery leaves anchor hole 41, is convenient to box steel pier and basis is fixed.
During installation, the present invention follows these steps to implement:
(1) height of high-strength steel arc 31: get the 1.0-1.2 of round steel pipe bridge pier body 100 cross-sectional diameter doubly.
(2) according to the welding position of the height determination diaphragm 200 of high-strength steel arc 31, diaphragm 200 and the high-strength steel arc 31 of anti-buckling energy-consumption housing and the ordinary steel wallboard of round steel pipe bridge pier body 100 are welded into entirety.
(3) be connected between Low Yield Point Steel arc 32 with inside and outside constraint curved plate 33,34 by the bolt or pre-stressed bolt 600 penetrating this three block plate.When adopting the first structure of anti-buckling energy-consumption housing 300, the size of inside and outside constraint curved plate 33,34 is less than the size of Low Yield Point Steel arc 32, and the end of inside and outside constraint curved plate 33,34 and the edge of Low Yield Point Steel arc 32 or and the pad of the high-strength connecting bolt 500 of following friction-type between distance be 10mm ~ 20mm; When adopting the second structure of anti-buckling energy-consumption housing 300, the size of inside and outside constraint curved plate 33,34 is identical with Low Yield Point Steel arc 32, and its end is concordant with Low Yield Point Steel arc 32 edge.
(4) the Low Yield Point Steel arc 32 with inside and outside constraint curved plate 33,34 is connected with high-strength steel arc 31 with the high-strength connecting bolt 500 of friction-type.When adopting the first structure of anti-buckling energy-consumption housing 300, only Low Yield Point Steel arc 32 is connected with high-strength steel arc 31 connecting bolt 500; When adopting the second structure of anti-buckling energy-consumption housing 300, Low Yield Point Steel arc 32 is connected with high-strength steel arc 31 connecting bolt 500 together with inside and outside constraint steel plate 33,34.Steel plate washer established by connecting bolt 500, adopts double nut to connect.
(5) base plate 400 and high-strength steel arc 31 are welded into entirety.
Claims (5)
1. a Novel circular steel cylinder pier, is characterized in that: comprise from top to bottom solid welding successively round steel pipe bridge pier body, diaphragm, anti-buckling energy-consumption housing and base plate together; The profile of above-mentioned anti-buckling energy-consumption housing is the hollow cylindrical matched with the shape of above-mentioned round steel pipe bridge pier body, above-mentioned anti-buckling energy-consumption housing comprises some pieces of high-strength steel arcs and some pieces of Low Yield Point Steel arcs, above-mentioned high-strength steel arc and above-mentioned Low Yield Point Steel arc are alternately distributed and surround above-mentioned anti-buckling energy-consumption housing, be detachably connected between above-mentioned Low Yield Point Steel arc and above-mentioned high-strength steel arc, and the external surface of the external surface of above-mentioned Low Yield Point Steel arc and above-mentioned high-strength steel arc is tangent; The inside and outside both sides of each above-mentioned Low Yield Point Steel arc also lock respectively and have interior constraint curved plate and outer constraint curved plate, and the radian of above-mentioned inside and outside constraint curved plate is identical with the radian of above-mentioned Low Yield Point Steel arc.
2. a kind of Novel circular steel cylinder pier according to claim 1, is characterized in that: the height of above-mentioned high-strength steel arc is 1.0-1.2 times of above-mentioned round steel pipe bridge pier body cross-section diameter; The cross-sectional arc length of above-mentioned high-strength steel arc is 1/8 of above-mentioned round steel pipe bridge pier body cross-section girth; The thickness t of above-mentioned high-strength steel arc
high=2f
generalt
general/ f
high, in formula, f
generalfor the yield strength of the wallboard of above-mentioned round steel pipe bridge pier body; t
generalfor the thickness of the wallboard of above-mentioned round steel pipe bridge pier body; f
highfor the material yield strength of above-mentioned high-strength steel arc.
3. a kind of Novel circular steel cylinder pier according to claim 1, it is characterized in that: the cross-sectional arc length of above-mentioned Low Yield Point Steel arc is 1/8 of above-mentioned round steel pipe bridge pier body cross-section girth, above-mentioned Low Yield Point Steel arc and all leave 20mm-30mm distance between above-mentioned diaphragm and bridge pier infrastructure end face.
4. a kind of Novel circular steel cylinder pier according to claim 1, is characterized in that: adopt high-strength friction-type to be bolted together between above-mentioned Low Yield Point Steel arc and above-mentioned high-strength steel arc; Or, above-mentioned Low Yield Point Steel arc, above-mentioned interior constraint curved plate, between above-mentioned outer constraint curved plate and above-mentioned high-strength steel arc, adopt high-strength friction-type to be bolted together.
5. a kind of Novel circular steel cylinder pier according to claim 1, is characterized in that: be connected by the bolt or pre-stressed bolt penetrating three between above-mentioned Low Yield Point Steel arc with above-mentioned inside and outside constraint curved plate; Above-mentioned inside and outside constraint curved plate has ellipse hole so that bolt passes and has enough slipping space.
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| CN201510357229.5A CN104963280B (en) | 2015-06-25 | 2015-06-25 | A kind of Novel circular steel cylinder pier |
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| CN201510357229.5A CN104963280B (en) | 2015-06-25 | 2015-06-25 | A kind of Novel circular steel cylinder pier |
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| CN104963280B CN104963280B (en) | 2016-10-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107354863A (en) * | 2017-07-21 | 2017-11-17 | 华侨大学 | A kind of assembled gate-type round steel pipe bridge pier that power consumption binder is set |
| CN109577170A (en) * | 2018-05-31 | 2019-04-05 | 华侨大学 | A kind of concrete pier of steel tube |
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