CN104963279A - Novel box-type steel bridge pier - Google Patents
Novel box-type steel bridge pier Download PDFInfo
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- CN104963279A CN104963279A CN201510357180.3A CN201510357180A CN104963279A CN 104963279 A CN104963279 A CN 104963279A CN 201510357180 A CN201510357180 A CN 201510357180A CN 104963279 A CN104963279 A CN 104963279A
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Abstract
The invention discloses a novel box-type steel bridge pier. The novel box-type steel bridge pier comprises a box-type steel bridge pier main body, a transverse diaphragm, a buckling-restrained frame body and a bottom plate, which are welded together in sequence from top to bottom, wherein the buckling-restrained frame body comprises four right-angled and L-shaped high strength steel plates and four flat plate-shaped low yield point steel plates; the four high strength steel plates form four hollow square-shaped corners; corresponding arms of the two adjacent high strength steel plates are detachably connected with each other through a low yield point steel plate; the external side surface of each low yield point steel plate is aligned with the external side surface of the corresponding arm of each high strength steel plate; and an internal restraint steel plate and an external restraint steel plate are also locked on the internal side and the external side of each low yield point steel plate, respectively. The novel box-type steel bridge pier disclosed by the invention is simply structured, is fast to construct on site, can be rapidly detected and repaired after earthquakes and is convenient for promotion and application in 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 box steel pier of anti-buckling energy-consumption framework, belong to steel bridge pier technical field in bridge engineering.
Background technology
Earthquake disaster has sudden and crushing, and the safety of human life, property in serious threat.China is located in the world on two most active earthquake zones, is one of the most serious country that suffers disaster from an earthquake, the casualties that earthquake causes and economic loss very huge.And the key link-bridge of communications and transportation, the weighty responsibility of serve as in earthquake relief work and transport goods and materials, rescuing life, research bridge novel earthquake-proof system significant.
Current based in the bridge pier of Ductility Design, the cross section ductile deformation mechanism preset realizes mainly through the surrender Formation cross-section plastic hinge of bridge pier structure material.But there is some deficiency following: 1, cross section ductile deformation is excessive is difficult to local recovery, and then causes by overall pulling down; Even if 2 ductile deformation are in restriction, the bearing capacity and stiffness of design section all can obviously decline, and is unfavorable for working on; 3, can block the traffic for the bridge pier dismounting on transportation lifeline and reconstruction, aggravation urban traffic jam.
Under earthquake motion effect, horizontal seismic force acts on superstructure by concentrating, and is delivered to bottom bridge pier.Relative to bottom bridge pier, the strength and stiffness of the superstructure of bridge are all enough large, and therefore, compare with foundation platform with superstructure, the seismic design of bottom bridge pier and performance are particularly important.Present stage, bridge pier both domestic and external adopts reinforced concrete structure form mostly, the bridge pier compressive property of this form is good, but ductility is poor, destructible in earthquake, and after earthquake, even if structure does not collapse, also can because there is excessive, expendable plastic deformation, and finally need to remove, rebuild.After giving shake, rescue and relief work makes troubles, and the indirect loss caused is also very huge.
In order to improve the anti-seismic performance of bridge, to take place frequently area in some earthquakes, as the Taiwan of the U.S., Japan and China, having started with the bottom bracing structure of steel bridge pier as bridge.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, convenient and quick construction, detects after shake and repair the remarkable advantages such as convenient.China, in urban viaduct, bridge on highway and pedestrian overcrossing etc. are built, is just gradually adopting steel bridge pier as the lower support component of bridge.And box steel pier all has good anti-bending strength at two major axes orientations, apply more general in Practical Project.But easily there is cripling distortion in box steel pier root wallboard in earthquake, causes the anti-seismic performance of box steel pier sharply to worsen.
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 a kind of novel box steel pier, its anti-seismic performance is good, be convenient to shake rear damage check and repair fast.
To achieve these goals, the present invention adopts following technical scheme:
A kind of novel box steel pier, comprise solid welding box steel pier body together successively from top to bottom, diaphragm, anti-buckling energy-consumption framework and base plate, the profile of above-mentioned anti-buckling energy-consumption framework is the hollow square body structure matched with the shape of above-mentioned box steel pier body, above-mentioned anti-buckling energy-consumption framework has high strength steel plate and four pieces of flat low yield point steel plates of four pieces of right angle L shapes, four pieces of above-mentioned high strength steel plates form four angles of above-mentioned hollow square body, removably linked together by one piece of above-mentioned low yield point steel plate between the respective arms of adjacent two pieces of above-mentioned high strength steel plates, the lateral surface of the lateral surface of each above-mentioned low yield point steel plate and the respective arms of each above-mentioned high strength steel plate flushes, the inside and outside both sides of each above-mentioned low yield point steel plate also lock respectively and have interior constraint steel plate and outer constraint steel plate, above-mentioned inside and outside two constraint steel plates are set and can prevent thin-walled low yield point steel plate generation out-of plane bending flexing, ensure that low yield point steel plate cuts the power consumption of lateral deflection clothes.
The height of above-mentioned high strength steel plate is 1.0-1.5 times of the maximum appearance and size of cross section of above-mentioned box steel pier body; The brachium of the single armed of above-mentioned high strength steel plate is 1/4 of above-mentioned box steel pier body respective cross section width; The thickness t of above-mentioned high strength steel plate
high=2f
generalt
general/ f
height,in formula, f
generalfor the yield strength of the wallboard of above-mentioned box steel pier body, t
generalfor the thickness of the wallboard of above-mentioned box steel pier body, f
highfor the material yield strength of above-mentioned high strength steel plate; The above-mentioned high strength steel plate forming the corner place of above-mentioned anti-buckling energy-consumption framework plays stress frame effect, can provide enough supporting capacitys and rigidity, and its extreme elastic strain value is comparatively large, can ensure above-mentioned low yield point steel plate surrender power consumption.
The width of above-mentioned low yield point steel plate is 1/2 of above-mentioned box steel pier body respective cross section width, above-mentioned low yield point steel plate 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 plate and above-mentioned high strength steel plate; Or, above-mentioned low yield point steel plate, above-mentioned interior constraint steel plate, between above-mentioned outer constraint steel plate and above-mentioned high strength steel plate, 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 plate with above-mentioned inside and outside constraint steel plate; Above-mentioned inside and outside constraint steel 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 plate has larger extreme elastic strain value, for low yield point steel plate surrender power consumption is given security; And high strength steel plate 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.By the form at low yield point steel plate both sides addition of constraints steel plate, effectively can prevent thin-walled low yield point steel plate generation out-of plane bending flexing, give full play to low yield point steel plate and cut lateral deflection and take energy dissipation capacity.
(3) can the anti-seismic performance of detecting appraisal bridge pier fast after shake, the shock resistance of rapid renovation reinforced box steel 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) site operation is quick.The each parts of box steel pier, comprise low yield point steel plate, 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 box steel pier can significantly shorten the traffic control time, therefore, at urban interchange, viaduct and pedestrian overcrossing, in newly-built and alteration work, effect is more remarkable.
(5) box steel pier provided by the invention has the advantages such as anti-seismic performance is good, ductility is high, power consumption is good.
Accompanying drawing explanation
Fig. 1 is the elevation of the novel box steel pier of the present invention.
Fig. 2 is the cross sectional representation of the first structure of anti-buckling energy-consumption framework in the present invention.
Fig. 3 is the scheme of installation of low yield point steel plate and inside and outside constraint steel 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 framework 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 box steel pier, as shown in Figure 1, comprise from top to bottom the box steel pier body 100 together of solid welding successively, diaphragm 200, anti-buckling energy-consumption framework 300 and base plate 400.
The profile of anti-buckling energy-consumption framework 300 is the hollow square body structure matched with the shape of box steel pier body 100, diaphragm 200 is the square plate that size conforms to the cross section of box steel pier body 100, box steel pier body 100 and anti-buckling energy-consumption framework 300 are passed through together with diaphragm 200 solid welding, diaphragm 200 can ensure that box steel pier body 100 and anti-buckling energy-consumption framework 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 framework 300 has high strength steel plate 31 and four pieces of flat low yield point steel plates 32 of four pieces of right angle L shapes, four pieces of high strength steel plates 31 form four angles of above-mentioned hollow square body between two side by side, removably linked together by one piece of low yield point steel plate 32 between the respective arms of adjacent two pieces of high strength steel plates 31, particularly: the short transverse both side ends of high strength steel plate 31 lateral wall is arranged with respectively along low yield point steel plate 32 extends, and be stacked at interior installation depression for the side end of low yield point steel plate 32, the side end of low yield point steel plate 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 respective arms of adjacent two pieces of high strength steel plates 31 and the one piece of low yield point steel plate 32 be connected between them form a sidewall of anti-buckling energy-consumption framework 300.On a sidewall of anti-buckling energy-consumption framework 300, the lateral surface of the respective arms of two pieces of high strength steel plates 31 and the lateral surface of low yield point steel plate 32 flush.
The height of high strength steel plate 31 is 1.0-1.5 times of the maximum appearance and size of cross section of box steel pier body 100; The brachium of the single armed (arm of L shape) of high strength steel plate 31 is 1/4 of box steel pier body 100 respective cross section width; The thickness t of high strength steel plate 31
high=2f
generalt
general/ f
height,in formula, f
generalfor the yield strength of the wallboard of box steel pier body 100, t
generalfor the thickness of the wallboard of box steel pier body 100, f
highfor the material yield strength (adopting 390MPa, 420MPa or 460MPa) of high strength steel plate 31.The four pieces of high strength steel plates 31 forming the corner place of anti-buckling energy-consumption framework 300 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 plate 32 surrenders power consumption.
The material of low yield point steel plate 32 is Low Yield Point Steel, and yield strength is 100MPa, 160MPa or 225MPa; The width of low yield point steel plate 32 is 1/2 of box steel pier body 100 respective cross section width, middle position between the respective arms being arranged on adjacent two pieces of high strength steel plates 31, the top of high strength steel plate 31 together with the soffit solid welding of diaphragm 200, bottom together with base plate 400 solid welding, all leave 20mm-30mm distance between the end face of low yield point steel plate 32 and diaphragm 200 and bridge pier infrastructure 700.
As Figure 2-3, the inside and outside both sides of each low yield point steel plate 32 also lock respectively and have interior constraint steel plate 33 and outer constraint steel plate 34, and interior constraint steel plate 33 is identical with outer constraint steel plate 34 thickness; Bolt or pre-stressed bolt 600 by penetrating three between low yield point steel plate 32 with inside and outside constraint steel plate 33,34 are connected; Inside and outside constraint steel 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 framework 300 as shown in Figure 2, the size of inside and outside constraint steel plate 33,34 is less than the size of low yield point steel plate 32, and the edge of its end and low yield point steel plate 32 or and the pad of connecting bolt 500 between distance be 10mm ~ 20mm.
In the present invention, low yield point steel plate 32, interior constraint steel plate 33, outer constraint steel plate 33 three as shown in Figure 6, also can be connected with high strength steel plate 31 by bolt by the another kind of structure of anti-buckling energy-consumption framework 300 jointly.In this case, the size of inside and outside constraint steel plate 33,34 is identical with low yield point steel plate 32, and its end is concordant with Low Yield Point Steel arc 32 edge.
In the present invention, low yield point steel plate 32 is for mainly to surrender energy-consuming parts, the inside and outside both sides of low yield point steel plate 32 lock inside and outside constraint steel plate 33,34 (material is general steel plate), 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, this type of root arranges that the box steel pier ductility of anti-buckling energy-consumption framework 300 is good, energy dissipation capacity strong, excellent earthquake resistance; The anti-seismic performance of the rear box steel pier of shake can be evaluated rapidly by the surrender situation detecting four pieces of low yield point steel plates 32, and its shock resistance can be repaired fast after changing anti-buckling energy-consumption framework.
In the present invention, according to different design needs, anti-buckling energy-consumption framework 300 can be divided into the large shake anti-buckling energy-consumption framework of slippage and the anti-buckling energy-consumption framework two kinds of complete slippage.
For the anti-buckling energy-consumption framework of large shake slippage, bolt applies certain pretension, certain thrust is produced between inside and outside constraint steel plate and low yield point steel plate, can ensure that low yield point steel plate cripling does not occur under little shake effect, and jointly stressed by contact friction with low yield point steel plate, powerful out of plane constraint effect is provided; Under large shake effect, the internal force difference between low yield point steel plate and inside and outside constraint steel 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 plate, low yield point steel plate gives full play to power consumption effect.
For the anti-buckling energy-consumption framework of complete slippage, bolt is Shi Hanzhang not; Under little shake and large shake effect, all can slippage between inside and outside constraint steel plate and low yield point steel plate, constraint steel plate only provides out of plane constraint to low yield point steel plate, not stressed in scope of participants; Low yield point steel plate provides in-plane stiffness and energy dissipation capacity.
As shown in Figure 5, base plate 400 is square plate, 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 plate 31 is determined: get the 1.0-1.5 of the maximum appearance and size of box steel pier body 100 cross section doubly.
(2) according to the welding position of the height determination diaphragm 200 of high strength steel plate 31, diaphragm 200 and the high strength steel plate 31 of anti-buckling energy-consumption framework 300 and the ordinary steel wallboard of box steel pier body 100 are welded into entirety.
(3) linked together between the low yield point steel plate 32 of same sidewall and inside and outside constraint steel 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 framework 300, the size of inside and outside constraint steel plate 33,34 is less than the size of low yield point steel plate 32, and the edge of its end and low yield point steel plate 32 or and the pad of high-strength friction-type connection bolt 500 between distance be 10mm ~ 20mm.When adopting the second structure of anti-buckling energy-consumption framework 300, the size of inside and outside constraint steel plate 33,34 is identical with low yield point steel plate 32, and its end is concordant with low yield point steel plate 32 edge.
(4) low yield point steel plate 32 with inside and outside constraint steel plate 33,34 is connected with the high-strength friction-type connection bolt 500 of high strength steel plate 31.When adopting the first structure of anti-buckling energy-consumption framework 300, only low yield point steel plate 32 is connected with high strength steel plate 31 connecting bolt 500; When adopting the second structure of anti-buckling energy-consumption framework 300, low yield point steel plate 32 is connected with high strength steel plate 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 plate 31 are welded into entirety.
Claims (5)
1. a novel box steel pier, it is characterized in that: comprise from top to bottom the box steel pier body together of solid welding successively, diaphragm, anti-buckling energy-consumption framework and base plate, the profile of above-mentioned anti-buckling energy-consumption framework is the hollow square body structure matched with the shape of above-mentioned box steel pier body, above-mentioned anti-buckling energy-consumption framework has high strength steel plate and four pieces of flat low yield point steel plates of four pieces of right angle L shapes, four pieces of above-mentioned high strength steel plates form four angles of above-mentioned hollow square body, removably linked together by one piece of above-mentioned low yield point steel plate between the respective arms of adjacent two pieces of above-mentioned high strength steel plates, the lateral surface of the lateral surface of each above-mentioned low yield point steel plate and the respective arms of each above-mentioned high strength steel plate flushes, the inside and outside both sides of each above-mentioned low yield point steel plate also lock respectively and have interior constraint steel plate and outer constraint steel plate.
2. the novel box steel pier of one according to claim 1, is characterized in that: the height of above-mentioned high strength steel plate is 1.0-1.5 times of the maximum appearance and size of cross section of above-mentioned box steel pier body; The brachium of the single armed of above-mentioned high strength steel plate is 1/4 of above-mentioned box steel pier body respective cross section width; The thickness t of above-mentioned high strength steel plate
high=2f
generalt
general/ f
high, in formula, f
generalfor the yield strength of the wallboard of above-mentioned box steel pier body, t
generalfor the thickness of the wallboard of above-mentioned box steel pier body, f
highfor the material yield strength of above-mentioned high strength steel plate.
3. the novel box steel pier of one according to claim 1, it is characterized in that: the width of above-mentioned low yield point steel plate is 1/2 of above-mentioned box steel pier body respective cross section width, above-mentioned low yield point steel plate and all leave 20mm-30mm distance between above-mentioned diaphragm and bridge pier infrastructure end face.
4. the novel box steel pier of one according to claim 1, is characterized in that: adopt high-strength friction-type to be bolted together between above-mentioned low yield point steel plate and above-mentioned high strength steel plate; Or, above-mentioned low yield point steel plate, above-mentioned interior constraint steel plate, between above-mentioned outer constraint steel plate and above-mentioned high strength steel plate, adopt high-strength friction-type to be bolted together.
5. the novel box steel pier of one 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 plate with above-mentioned inside and outside constraint steel plate; Above-mentioned inside and outside constraint steel plate has ellipse hole so that bolt passes and has enough slipping space.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510357180.3A CN104963279B (en) | 2015-06-25 | 2015-06-25 | Novel box-type steel bridge pier |
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| CN201510357180.3A CN104963279B (en) | 2015-06-25 | 2015-06-25 | Novel box-type steel bridge pier |
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| CN104963279B CN104963279B (en) | 2017-02-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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|---|---|---|---|---|
| CN1635224A (en) * | 2003-12-30 | 2005-07-06 | 上海市政工程设计研究院 | Bridge structure and construction method therefor |
| JP2009097257A (en) * | 2007-10-17 | 2009-05-07 | Ohbayashi Corp | Designing method for bridge pier joint structure |
| JP2011006944A (en) * | 2009-06-26 | 2011-01-13 | Tis&Partners Co Ltd | Bridge structure |
| CN202626808U (en) * | 2012-06-11 | 2012-12-26 | 中国水电顾问集团贵阳勘测设计研究院 | Beam-type steel bridge |
| CN204875492U (en) * | 2015-06-25 | 2015-12-16 | 华侨大学 | Novel box steel bridge mound |
-
2015
- 2015-06-25 CN CN201510357180.3A patent/CN104963279B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1635224A (en) * | 2003-12-30 | 2005-07-06 | 上海市政工程设计研究院 | Bridge structure and construction method therefor |
| JP2009097257A (en) * | 2007-10-17 | 2009-05-07 | Ohbayashi Corp | Designing method for bridge pier joint structure |
| JP2011006944A (en) * | 2009-06-26 | 2011-01-13 | Tis&Partners Co Ltd | Bridge structure |
| CN202626808U (en) * | 2012-06-11 | 2012-12-26 | 中国水电顾问集团贵阳勘测设计研究院 | Beam-type steel bridge |
| CN204875492U (en) * | 2015-06-25 | 2015-12-16 | 华侨大学 | Novel box steel bridge mound |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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