CN108130413A - The girder steel oscillation time-effect method of steel structure bridge - Google Patents
The girder steel oscillation time-effect method of steel structure bridge Download PDFInfo
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- CN108130413A CN108130413A CN201710166184.2A CN201710166184A CN108130413A CN 108130413 A CN108130413 A CN 108130413A CN 201710166184 A CN201710166184 A CN 201710166184A CN 108130413 A CN108130413 A CN 108130413A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 125
- 239000010959 steel Substances 0.000 title claims abstract description 125
- 230000010355 oscillation Effects 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000001550 time effect Effects 0.000 title claims abstract description 14
- 230000035882 stress Effects 0.000 claims abstract description 44
- 230000032683 aging Effects 0.000 claims abstract description 38
- 238000011282 treatment Methods 0.000 claims abstract description 20
- 230000001133 acceleration Effects 0.000 claims description 19
- 239000007787 solid Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 3
- 230000008030 elimination Effects 0.000 abstract description 3
- 238000003379 elimination reaction Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000011017 operating method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 5
- 238000003483 aging Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of girder steel oscillation time-effect methods of steel structure bridge, are related to steel construction piece destressing processing technology field, girder steel has bridge floor portion and the support portion positioned at the bridge lower face, using the more oscillating aging equipment, including following operating procedure：Girder steel is placed on supporting pad by the first step；Multi-shaker vibration timeliness equipment is mounted on girder steel by second step；Third step, shake before frequency sweep；4th step carries out vibration stress relief treatment to girder steel；5th step, shake after frequency sweep.Compared with prior art, the present invention can effectively eliminate its residual stress, and the residual stress elimination factor that is averaged reaches 49%, solves the problems, such as that the girder steel of steel structure bridge is difficult to eliminate residual stress, can be in steel structure bridge manufacturing application.
Description
Technical field
The present invention relates to steel construction piece destressing processing technology field, especially a kind of steel for being used to eliminate steel structure bridge
The oscillation time-effect method of beam welding residual stress.
Background technology
The girder steel of steel structure bridge contains the structure types such as steel truss girder, steel box-girder and steel reinforced concrete combination beam, belongs to large-scale welding
Structural member, some are up to thousands of tons of.This structural member is made of crisscross gusset, and welding position is more, is existed very after welding
The residual stress of high complex distribution, stress concentration phenomenon protrude, and girder steel is not only acted on by the weight of itself, and also carrying comes from
The effect of the external force such as bridge floor vehicle and wind-force, thus this residual stress be superimposed with the working stress of bridge after this may result in
There is the deformation even serious consequence of fracture in bridge, it is therefore desirable to eliminate these residual stress.Common oscillating aging equipment at present
Vibration stress relief treatment is carried out to steel construction piece to eliminate residual stress, this oscillating aging equipment is swashed by a controller, one
It shakes device and oscillation pickup is formed, controller is connect by conducting wire with oscillation pickup and vibrator respectively.Oscillating aging requirement resonance
Generated dynamic stress must be over the yield limit of material after being superimposed with residual stress, can just effectively eliminate residual stress.It is existing
Oscillation time-effect method be to be handled using separate unit oscillating aging equipment, but this large-scale workpiece of girder steel not only rigidity
By force, and weight weight, the exciting force of separate unit vibrator are too small, it is difficult to and it obtains and the required dynamic stress that resonates is carried out to girder steel,
After dynamic stress is superimposed with residual stress, can not be more than material yield limit, therefore be not achieved effectively eliminate girder steel remnants should
The purpose of power.
Invention content
The technical problem to be solved in the present invention is to provide a kind of steel structure bridge that can effectively eliminate girder steel residual stress
Girder steel oscillation time-effect method.
The technical proposal for solving the technical problem of the invention is：A kind of girder steel oscillating aging side of steel structure bridge
Method, girder steel has bridge floor portion and the support portion positioned at the bridge lower face, using the more oscillating aging equipment, including following
Operating procedure：
The girder steel is placed on four supporting pads, the Support Position of the supporting pad by the first step, and width direction is located near
The support portion edge, length direction are located at the 2L/9 away from the support portion end, and L is the length of the support portion；
Second step, one end that the vibrator of the more oscillating aging equipment is fixed on to the bridge floor portion along its length, make
The motor direction of rotation all same of each vibrator, the eccentric angle angle of each vibrator be disposed as 10 degree~
180 degree；The oscillation pickup of the more oscillating aging equipment is fixed on to the other end in the bridge floor portion along its length；
Frequency sweep before third walks, the vibrator of the wherein one oscillating aging equipment of startup is shaken, passes through the vibration measuring
Device measures the whole formants of the girder steel in the vibrator rated frequency range, and frequency sweep is total to before obtaining the shaking of the girder steel
Data of shaking and resonance curve；The resonance data refers to maximum vibration acceleration value a during resonance and its corresponding described swashs
The motor of device of shaking turns frequency value f, and the resonance curve refers to that the vibration acceleration a and the motor of the vibrator turn frequency f
A-f relation curves；
Frequency sweep resonance data and resonance curve before 4th step, basis are shaken, the subresonance frequency for choosing low-frequency resonance peak therein are made
For the master oscillator frequenc of the girder steel, the vibration frequency for starting and controlling every vibrator is that the master of the girder steel shakes frequently
Rate, the more vibrators are carried out at the same time simultaneous resonance, and vibration stress relief treatment, vibration stress relief treatment time are carried out to the girder steel
It it is 0.5 hour~5 hours, it is 20m/s2~120m/s2 that vibration acceleration value is controlled during oscillating aging；The low-frequency resonance
Peak refers in excited frequency and vibration acceleration homologous thread, multiple formant wave crests that excited frequency occurs from low to high
In, the formant wave crest in low-limit frequency；The subresonance frequency refers to the maximum vibration acceleration value a1's of the formant
The frequency that turns of the motor of the corresponding vibrator in 2/3 place is worth；
5th step, the vibrator for starting the wherein one oscillating aging equipment, to completing multiple formant oscillating agings
Frequency sweep after the girder steel of processing is shaken measures the girder steel in the vibrator rated frequency range by the oscillation pickup
Interior whole formants obtain frequency sweep resonance data and resonance curve after the shaking of the girder steel and complete to the steel vibration of beam
Ageing treatment.
In the girder steel oscillation time-effect method technical solution of above-mentioned steel structure bridge, more specific technical solution can also be：
The upper surface in the bridge floor portion is rectangle, and the vibrator is located at the edge of the upper surface rectangle diagonal one end in the bridge floor portion
Place, the oscillation pickup are located at the edge of this rectangle diagonal other end of the upper surface in the bridge floor portion.
Further：Auxiliary vibration frequency of the subresonance frequency as the girder steel of another formant is at least chosen, to complete
The girder steel into master oscillator frequenc simultaneous resonance carries out auxiliary vibrational ageing treatment, controls the vibration frequency of every vibrator
It is the auxiliary vibration frequency of the girder steel, is carried out at the same time simultaneous resonance, the vibration stress relief treatment time is 0.5 hour~5 hours, vibration
It is 20m/s2~120m/s2 that vibration acceleration value is controlled in ag(e)ing process.
Further：Rubber pad of the supporting pad for cylinder, a diameter of 50 millimeters of the rubber pad of the cylinder
~500 millimeters, thickness is 10 millimeters~500 millimeters, and elasticity modulus is 0.7Mpa~2Mpa, and Poisson's ratio is 0.5~1.5.
Further：Multiple vibrators are adjoining setting, and multiple oscillation pickups are adjoining setting.
Further：The girder steel is in horizontal positioned.
By adopting the above-described technical solution, the present invention has the advantages that compared with prior art：1st, using more
Platform oscillating aging equipment to girder steel carry out vibration stress relief treatment, vibrator be just not limited to one but more, this more vibrators
In same position and in same subresonance frequency simultaneous resonance, and the direction of exciting force is identical, therefore its exciting
Power can be improved exponentially, can be more than the surrender of material after the dynamic stress generated when resonating is superimposed with residual stress
The limit achievees the purpose that effectively eliminate residual stress, and the residual stress elimination factor that is averaged is about 49% after testing, meets national standard
（GB/T25712-2010）The average residual stress relief ratio of defined is not less than 30% requirement；2nd, oscillating aging used is set
Standby is existing, without increasing the input of equipment；The vibration stress relief treatment time of a girder steel is less than 2 days simultaneously, power consumption
Less than 20 degree, timeliness cost is extremely low, is implemented in girder steel production scene, does not damage the surface quality of girder steel, can solve
The bridge quality problems hidden danger as caused by residual stress.
Description of the drawings
Fig. 1 is the girder steel oscillating aging using more platform oscillating aging equipment to steel structure bridge of the embodiment of the present invention
Schematic diagram.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the girder steel resonance data of the steel structure bridge of the embodiment of the present invention and resonance curve schematic diagram.
Specific embodiment
Below in conjunction with attached drawing embodiment, the invention will be further described.
Embodiment 1：
Girder steel 2 shown in FIG. 1 for steel structure bridge, belongs to steel box girder, and girder steel 2 has bridge floor portion 202 and positioned at the bridge
The support portion 201 of 202 lower section of face, weight is 1200 tons, 2 high 4500mm of girder steel, and the length × width in the bridge floor portion 202 of girder steel 2 is
110000mm × 33100mm, the length L of the support portion 201 of girder steel 2 is 110000mm, and girder steel 2 is welding structural element, using steel
Plate is welded.
The oscillation time-effect method of the girder steel 2 of this steel structure bridge is：Use three oscillating aging equipment 1, three vibrations
The specified exciting force of timeliness equipment 1 is 50KN, and specified excited frequency is 133.33HZ；Every oscillating aging equipment 1 has
One vibrator, 101, oscillation pickups 102 and four supporting pads 103, controller by conducting wire respectively with vibrator 101 and survey
The device 102 that shakes connects, including following operating procedure：
Girder steel 2 is in horizontally disposed by the first step, i.e. the upper surface of girder steel Bridge 2 face 202 and support ground is hung to be arranged in parallel
Steel loading beam 2 is placed on four supporting pads 103, the Support Position of supporting pad 103, and width direction is located at the support of nearly girder steel 2
The edge in portion, length direction is located at the 2L/9 of the support portion end away from nearly girder steel 2, i.e., away from support portion end 244444mm
Place；One supporting pad 103 of the present embodiment is made of the adjoining placement of three cylindrical rubber pads, each cylindrical rubber
A diameter of 50 millimeters of pad, thickness are 10 millimeters, elasticity modulus 0.7Mpa, and Poisson's ratio 0.5, cylindrical rubber pad can obtain
It obtains and preferably flexibly supports effect；Four supporting pads can safely and reliably support girder steel, and girder steel is avoided to turn on one's side, and safe thing occur
Therefore girder steel damage quality accident；The position that another supporting pad is placed is girder steel formant wave trough position, can reduce supporting point
To the obstruction of resonance, best resonance effect can be obtained；
Three vibrators 101 of three oscillating aging equipment 1 are homogeneously neighboringly fixed on girder steel 2 by second step along its length
Bridge floor portion one end upper surface, three oscillation pickups 102 of three oscillating aging equipment 1 are homogeneously neighboringly fixed on girder steel 2
202 other end of bridge floor portion upper surface, the upper surface in bridge floor portion 202 is rectangle, and vibrator 101 is located at the upper of bridge floor portion 202
The edge of end face rectangle diagonal one end, this rectangle diagonal that oscillation pickup 102 is located at the upper surface in bridge floor portion 202 are another
The edge at end is placed on three oscillation pickups 102 at this, and the resonance acceleration value of girder steel, judgement can be detected in same position
Whether resonance acceleration figure reaches expected numerical value；This position is the formant wave crest of girder steel simultaneously, can be detected in this way
The natural reonant frequency of girder steel 2 implements resonance timeliness, can guarantee that girder steel integrally reaches best resonance effect, as shown in Figure 2；
The motor direction of rotation all same setting of each vibrator 101, so that the direction of the exciting force generated is identical, exciting force
It exponentially improves, without cancelling out each other；The eccentric angle angle of each vibrator 105 is disposed as 10 degree ~ 180 degree, to obtain
Appropriate exciting force can reach and effectively eliminate girder steel residual stress, do not damage girder steel；
Frequency sweep before third walks, the vibrator 101 of wherein one oscillating aging equipment 1 of startup is shaken, is measured by oscillation pickup 102
Whole formants of the girder steel 2 in 101 rated frequency range of vibrator obtain frequency sweep resonance data and resonance before the shaking of girder steel 2
Curve；Resonance data refers to that the motor of maximum vibration acceleration value a and its corresponding vibrator 101 during resonance turn frequency value f,
Resonance curve refers to that the motor of vibration acceleration a and vibrator 101 turns the a-f relation curves of frequency f；
Frequency sweep resonance data and resonance curve before 4th step, basis are shaken,（1）Choose the subresonance frequency of low-frequency resonance peak f1 therein
Master oscillator frequencs of the rate fz1 as girder steel 2, the vibration frequency for starting and controlling every vibrator 101 are that the master of girder steel 2 shakes frequently
Rate, three vibrators 105 are carried out at the same time simultaneous resonance, and to the progress vibration stress relief treatment of girder steel 2, the vibration stress relief treatment time is
0.5 hour, it was 20m/s2~120m/s2 that oscillating aging controls vibration acceleration value in the process；Low-frequency resonance peak refers in exciting
In frequency and vibration acceleration homologous thread, in multiple formant wave crests that excited frequency occurs from low to high, in lowest frequency
The formant wave crest of rate；Subresonance frequency refers to the corresponding exciting in 2/3 place of the maximum vibration acceleration value a1 of the formant
The frequency that turns of the motor of device 101 is worth；（2）Auxiliary vibration frequencies of the subresonance frequency fz2 of second formant f2 as girder steel is chosen, it is right
The girder steel 2 for completing master oscillator frequenc simultaneous resonance carries out auxiliary vibrational ageing treatment, and the vibration frequency for controlling every vibrator 101 is equal
For the auxiliary vibration frequency of girder steel, simultaneous resonance is carried out at the same time, the vibration stress relief treatment time is 0.5 hour, is controlled during oscillating aging
Damping moves acceleration value as 20m/s2~120m/s2；
5th step, the vibrator 101 for starting wherein one oscillating aging equipment 1, to completing multiple formant vibration stress relief treatments
Girder steel 2 shaken after frequency sweep, pass through oscillation pickup 102 and measure whole resonance of the girder steel 2 in 101 rated frequency range of vibrator
Peak obtains frequency sweep resonance data and resonance curve after the shaking of girder steel 2 and completes vibration stress relief treatment to girder steel 2.
Residual stress detection data before and after 2 oscillating aging of girder steel is as shown in table 1：
Testing result shows that the residual stress elimination factor that is averaged is about 49%, meets national standard（GB/T25712-2010）Defined
Average residual stress relief ratio be not less than 30% requirement, it was demonstrated that achieved the purpose that effectively eliminate residual stress.
Claims (6)
1. a kind of girder steel oscillation time-effect method of steel structure bridge, girder steel（2）With bridge floor portion（201）With positioned at the bridge floor portion
（201）The support portion of lower section（202）, which is characterized in that use the more oscillating aging equipment（1）, including following operation step
Suddenly：
The first step, by the girder steel（2）It is placed on four supporting pads（103）On, the supporting pad（103）Support Position,
Width direction is located at the nearly support portion（202）Edge, length direction are located at away from the support portion（202）The 2L/9 of end
Place, L are the support portion（202）Length；
Second step, by the more oscillating aging equipment（1）Vibrator（101）It is fixed on the bridge floor portion along its length
（201）One end, make each vibrator（101）Motor direction of rotation all same, each vibrator（101）It is inclined
Heart angle angle is disposed as 10 degree ~ 180 degree；By the more oscillating aging equipment（1）Oscillation pickup（102）It is solid along its length
It is scheduled on the bridge floor portion（201）The other end；
Third step starts the wherein oscillating aging equipment（1）The vibrator（101）Frequency sweep before being shaken, passes through
The oscillation pickup（102）Measure the girder steel（2）In the vibrator（101）Whole formants in rated frequency range, are obtained
Obtain the girder steel（2）Shake before frequency sweep resonance data and resonance curve；The resonance data refers to that maximum vibration during resonance adds
Velocity amplitude a and its corresponding vibrator（101）Motor turn frequency value f, the resonance curve refer to it is described vibration acceleration
Spend a and the vibrator（101）The motor turn the a-f relation curves of frequency f；
Frequency sweep resonance data and resonance curve before 4th step, basis are shaken, the subresonance frequency for choosing low-frequency resonance peak therein are made
For the girder steel（2）Master oscillator frequenc, start and control every vibrator（101）Vibration frequency be the girder steel
（2）Master oscillator frequenc, the more vibrators（101）Simultaneous resonance is carried out at the same time, to the girder steel（2）It carries out at oscillating aging
Reason, vibration stress relief treatment time are 0.5 hour ~ 5 hours, control during oscillating aging vibration acceleration value for 20m/s2 ~
120m/s²；The low-frequency resonance peak refers to that in excited frequency and vibration acceleration homologous thread excited frequency goes out from low to high
In existing multiple formant wave crests, the formant wave crest in low-limit frequency；The subresonance frequency refers to the formant most
The corresponding vibrator in 2/3 place of big vibration acceleration value a1（101）Motor turn frequency be worth；
5th step starts the wherein oscillating aging equipment（1）The vibrator（101）, to completing multiple formants
The girder steel of vibration stress relief treatment（2）Frequency sweep after being shaken passes through the oscillation pickup（102）Measure the girder steel（2）Institute
State vibrator（101）Whole formants in rated frequency range, obtain the girder steel（2）Shake after frequency sweep resonance data and altogether
Shake curve, that is, completes to the girder steel（2）Vibration stress relief treatment.
2. the girder steel oscillation time-effect method of steel structure bridge according to claim 1, it is characterised in that：The bridge floor portion
Upper surface is rectangle, the vibrator（101）Positioned at the bridge floor portion（201）Upper surface rectangle diagonal one end edge
Place, the oscillation pickup（102）Positioned at the bridge floor portion（201）Upper surface this rectangle diagonal other end edge.
3. the girder steel oscillation time-effect method of steel structure bridge according to claim 1, it is characterised in that：It at least chooses another
The subresonance frequency of a formant is as the girder steel（2）Auxiliary vibration frequency, to complete master oscillator frequenc simultaneous resonance the steel
Beam（2）Auxiliary vibrational ageing treatment is carried out, controls every vibrator（101）Vibration frequency be the girder steel（2）'s
Auxiliary vibration frequency is carried out at the same time simultaneous resonance, and the vibration stress relief treatment time is 0.5 hour~5 hours, is controlled during oscillating aging
Vibration acceleration value is 20m/s2~120m/s2.
4. the girder steel oscillation time-effect method of the steel structure bridge according to claims 1 or 2 or 3, it is characterised in that：The branch
Stake pad（103）For cylindrical rubber pad, a diameter of 50 millimeters~500 millimeters of the rubber pad of the cylinder, thickness 10
Millimeter~500 millimeters, elasticity modulus are 0.7Mpa~2Mpa, and Poisson's ratio is 0.5~1.5.
5. the girder steel oscillation time-effect method of steel structure bridge according to claim 4, it is characterised in that：Multiple excitings
Device（101）It is adjoining setting, multiple oscillation pickups（102）It is adjoining setting.
6. the girder steel oscillation time-effect method of steel structure bridge according to claim 5, it is characterised in that：The girder steel（2）
In horizontal positioned.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710166184.2A CN108130413B (en) | 2017-03-20 | 2017-03-20 | The girder steel oscillation time-effect method of steel structure bridge |
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| CN201710166184.2A CN108130413B (en) | 2017-03-20 | 2017-03-20 | The girder steel oscillation time-effect method of steel structure bridge |
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| CN108130413B CN108130413B (en) | 2019-06-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11327054B2 (en) | 2018-09-10 | 2022-05-10 | Shanghai Maritime University | System for determining excitation frequency of vibratory stress relief and method therefor |
| CN115433816A (en) * | 2022-10-11 | 2022-12-06 | 上海振华重工(集团)股份有限公司 | Stress relieving method for small frame structure of shore bridge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101222164B1 (en) * | 2012-08-17 | 2013-01-14 | 김원식 | Thermo vibro sound apparatus with adjustable wave length |
| CN103045844A (en) * | 2012-12-06 | 2013-04-17 | 上海裕达实业公司 | Destressing method applied to satellite aluminum alloy riveting bearing barrel |
| CN103710528A (en) * | 2013-12-07 | 2014-04-09 | 广西大学 | Multiple resonance multi-shaft vibration aging device and realization method thereof |
-
2017
- 2017-03-20 CN CN201710166184.2A patent/CN108130413B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101222164B1 (en) * | 2012-08-17 | 2013-01-14 | 김원식 | Thermo vibro sound apparatus with adjustable wave length |
| CN103045844A (en) * | 2012-12-06 | 2013-04-17 | 上海裕达实业公司 | Destressing method applied to satellite aluminum alloy riveting bearing barrel |
| CN103710528A (en) * | 2013-12-07 | 2014-04-09 | 广西大学 | Multiple resonance multi-shaft vibration aging device and realization method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11327054B2 (en) | 2018-09-10 | 2022-05-10 | Shanghai Maritime University | System for determining excitation frequency of vibratory stress relief and method therefor |
| CN115433816A (en) * | 2022-10-11 | 2022-12-06 | 上海振华重工(集团)股份有限公司 | Stress relieving method for small frame structure of shore bridge |
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