CN106289692B - Variable beam length simply supported beam and continuous beam self-vibration characteristic test platform - Google Patents
Variable beam length simply supported beam and continuous beam self-vibration characteristic test platform Download PDFInfo
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- CN106289692B CN106289692B CN201610623212.4A CN201610623212A CN106289692B CN 106289692 B CN106289692 B CN 106289692B CN 201610623212 A CN201610623212 A CN 201610623212A CN 106289692 B CN106289692 B CN 106289692B
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- movable base
- bearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0008—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of bridges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0066—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by exciting or detecting vibration or acceleration
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention discloses a kind of variable beam length simply supported beam and continuous beam self-vibration characteristic test platform, including sliding support, limit bearing, movable base, fixed pedestal, foundation platform, acceleration transducer, computer, dynamic signalling analysis system, power hammer sensor into shape；Movable base and sliding support can be adjusted and fixed according to test beam across footpath, rolling bearing can be moved along sliding rail, to sliding support, limited support space fine-adjusting；After sliding support, limited support spacing determine, limiting plate is placed at the gap of bearing and sliding rail, is limited and is fixed to bearing.Test beam is seated in sliding support, on limited support；Sliding support, limited support and test beam support end are fixed by hook bolt and diplopore clamping plate；Acceleration transducer is arranged on the measuring point of test beam surface, acceleration transducer, power hammer sensor connect dynamic signalling analysis system, and with calculate mechatronics；Sensor is hammered into shape by power and applies dynamic load, you can carries out self-vibration characteristic test.By the movement of movable base or the addition of quantity, it can be achieved that testing different beam lengths, the different self-vibration characteristics across several simply supported beam or continuous beam, the versatility and accuracy of test platform are embodied.
Description
Technical field
The invention belongs to road and bridge engineering technical fields, are related to a kind of self-vibration characteristic test platform, more particularly to a kind of variable
Beam length simply supported beam and continuous beam self-vibration characteristic test platform；Especially suitable for simply supported beam and continuous beam.
Background technology
The self-vibration characteristic of bridge structure is the important evidence of bridge standing state assessment, special for the self-vibration of service phase bridge
Property test result can be used for bridge impact coefficient calculate, non-destructive tests etc..Self-vibration characteristic test result has objectivity
By force, the disease of concealment part in structure can be found, the advantages that testing time is short and easy to operate.Therefore, the self-vibration of bridge structure
Characteristic is of great significance for the design, detection and status assessment of bridge structure.Universities and colleges of China and other scientific research institutions
Numerous studies have been carried out for non-destructive tests and Bridge State Assessment that bridge structure self-vibration characteristic is support, and have formd one
A little relevant theoretical methods, these theoretical methods need that by the accuracy of experimental verification self-vibration characteristic practice can be put into.And
When the shortage of Common Testing platform causes to test beam type and beam length change, test material is difficult to reuse, cause very greatly
It wastes, and experiment funds and test period greatly increase.
In science of bridge building field, simply supported beam and continuous beam are widely used as two kinds of basic structure forms, for simply supported beam
And the self-vibration characteristic test of continuous beam is significant.And test of the set-up mode of bridge structure supporting condition for self-vibration characteristic
As a result be affected, if cannot accurate simulation bridge structure supporting condition, it will lead to the test result of self-vibration characteristic
Inaccuracy, error even greater than damages test result variable quantity caused by disease, so that Bridge State Assessment result is not
It is enough accurate.Vertical displacement constraint is only provided it is well known that the supporting condition of simply supported beam and continuous beam is both ends bearing, without providing
Restricted joint angle.Support system mostly uses greatly rubber support form in existing simply supported beam and the experiment of continuous beam self-vibration characteristic, makees
Mainly have at 2 points for the not accurate enough reason of supporting condition：(1) it is that test data is made to reach preferable signal-to-noise ratio, power hammer excitation letter
Number should more significantly, and due to test beam conduct oneself with dignity it is lighter, beam-ends can be inevitably generated upward rigid body displacement under power hammer excitation；
(2) since rubber support and beam-ends contact area are larger, the flexible deformation of rubber support can influence turning for beam-ends under power hammer excitation
Angular displacement will certainly have an impact the test result of self-vibration characteristic.Therefore, a kind of variable beam length simply supported beam of invention and continuous beam
The accurate Common Testing platform of self-vibration characteristic test result just seems very urgent.
Invention content
The invention discloses a kind of variable beam length simply supported beam and continuous beam self-vibration characteristic test platforms, to solve the prior art
Middle supporting condition is not accurate enough, influences the test result of self-vibration characteristic；Lack Common Testing platform, tests beam type and beam length
When change, test material is difficult to reuse, cause very big waste, and tests funds and the problems such as the test period greatly increases.
The present invention includes sliding support, limit bearing, movable base, fixed pedestal, foundation platform, acceleration sensing
Device, computer, dynamic signalling analysis system, power hammer sensor into shape；Movable base, foundation platform are concrete component；It can
There is connecting hole on mobile foundation；The raised fixed pedestal in one end of foundation platform；Fixed pedestal formed by integrally casting is in ground
One end of platform；The other end has the hole equal with the connecting hole pitch-row on movable base, constitutes a distribution hole group；Ground
Distribution hole group group number on platform is more than 1, the distribution of distribution hole group linear array；Fastener connects the connecting hole on movable base
Hole on foundation platform, movable base is securedly mounted on foundation platform；By changing the connection on movable base
The hole link position in hole and foundation platform changes the distance between movable base, fixed pedestal；Sliding support is fastenedly connected peace
On movable base；Limit bearing is fastenedly connected on fixed pedestal；It includes the identical branch of 2 block structures to limit bearing
Fagging, rolling bearing, limited support, 2 hook bolts, diplopore clamping plate；There is hook bolt through hole on diplopore clamping plate；Rotation
Bearing is installed on the supporting plate；Limited support is connected with rolling bearing；The hook portion of 2 hook bolts is matched with limited support
It closes；2 hook bolt tops and the hook bolt through hole of diplopore clamping plate coordinate；Sliding support includes the identical branch of 2 block structures
Fagging, rolling bearing, sliding support, 2 hook bolts, diplopore clamping plate, 4 pieces of floors, 2 limiting plates；Two support plate both sides
Symmetrically distinguish two floors of arranged for interval up and down；Spacing is equal to bearing diameter, and spaced apart 2 floors form sliding rail
Road；Rolling bearing is mounted in sliding rail；Sliding support, limited support are in a horizontal plane；It can be according to test beam across footpath
Movable base and sliding support are adjusted and are fixed, realizes that sliding support, limit bearing spacing are adjusted；And it can be along sliding
Track moves rolling bearing, to sliding support, limited support space fine-adjusting；After sliding support, limited support spacing determine, two
The identical right angled triangle limiting plate of structure is placed at the gap of bearing and sliding rail, is limited and is fixed to bearing.Test beam is set
It is placed on sliding support, on limited support；Hook bolt passes through the hook bolt through hole of diplopore clamping plate, nut to match with hook bolt
It closes, nut compressing diplopore clamping plate, diplopore clamping plate fixes test beam with sliding support, limited support；Acceleration transducer is arranged in
On the measuring point of test beam surface, acceleration transducer, power hammer sensor connect dynamic signalling analysis system, and electromechanical with calculating
Connection；Sensor is hammered into shape by power and applies dynamic load, you can carries out self-vibration characteristic test.
Optimally, foundation platform of the present invention further includes ground bearing plate；Movable base includes movable base bearing plate；
Fixed pedestal includes fixed pedestal bearing plate；There is bolt hole identical with foundation platform pitch-row on ground bearing plate；It is removable
There is hole identical with movable base pitch-row on pedestal bearing plate；Movable base bearing plate, fixed pedestal bearing plate also have
There is hole identical with sliding support, limit supporting stand hole distance；2 pieces of movable base bearing plates are separately mounted to movable base upper table
Face and lower surface；Fixed pedestal bearing plate is mounted on fixed pedestal upper surface；Fastener connects on movable base bearing plate
Ground bearing plate bolt hole on hole, foundation platform on hole, movable base connects sliding support and movable base fastening
It connects on foundation platform.
Operating procedure is as follows：
The first step, installation limit bearing, sliding support：
Limit bearing is fastenedly connected with fixed pedestal；Sliding support and mobile foundation are fastenedly connected；
Second step measures test beam beam length, adjusts movable base at a distance from fixed pedestal；
Third walks, and the rolling bearing on sliding support is moved along sliding rail, mobile to slidably support, fine tuning limit bearing,
Sliding support, the limited support distance of sliding support；
4th step limits bearing：
The identical right angled triangle limiting plate of two structures is placed at the gap of rolling bearing and sliding rail, until even
Connecing the sliding support of rolling bearing can not move.
5th step, test beam are fixed：
Test beam both ends are respectively placed on sliding support and limit bearing, test beam is made to be in horizontality.
The hook bolt of sliding support and limited support both ends is disposed vertically, the unthreaded hole of diplopore clamping plate is directed at hook
Type bolt is used in combination the identical screw cap anchoring of 4 structures that test beam support end is made to fix.
6th step arranges acceleration transducer, carries out self-vibration characteristic test.
Acceleration transducer is arranged on the measuring point of test beam surface, by acceleration transducer and power hammer sensor access dynamic
The interface channel of signal testing analysis system, and computer is connected, hammering sensor into shape by power applies dynamic load, and it is special to carry out self-vibration
Property test.
Present invention has the advantages that：By the movement of movable base or the addition of quantity, it can be achieved that different beam lengths, no
It is tested with the self-vibration characteristic across several simply supported beam or continuous beam, embodies the versatility of test platform；The present invention can be big
The accurate test that special universities and colleges and other scientific research institutions carry out the self-vibration characteristic of simply supported beam and continuous beam provides general-purpose platform；The present invention
For girder construction supporting condition very close to simply supported beam or the supporting condition of continuous beam, greatly improve measuring accuracy, body
The accuracy of the present invention is showed.
Description of the drawings
Fig. 1 is that self-vibration characteristic test platform of the present invention tests free beam free beam schematic diagram；
Fig. 2 is self-vibration characteristic test platform principle schematic of the present invention；
Fig. 3 is foundation platform schematic diagram；
Fig. 4 is sliding support schematic diagram；
Fig. 5 is limit bearing schematic diagram；
Fig. 6 is movable base schematic diagram；
Fig. 7 is fixed pedestal schematic diagram；
In figure：1 sliding support, 2 limit bearings, 3 movable bases, 4 fixed pedestals, 5 foundation platforms, 6 support plates, 7 ribs
Plate, 8 flat bases, 9 sliding rails, 10 rolling bearings, 11 sliding supports, 12 hook bolts, 13 diplopore clamping plates, 14 limiting plates,
15 limited supports, 16 rolling bearings, 17 ground bearing plates, 18 movable base bearing plates, 19 fixed pedestal bearing plates, 20 accelerate
Spend sensor, 21 computers, 22 dynamic signalling analysis systems, 23 power hammer sensor, 3a connecting holes, the holes 5a, 8a mounting holes,
17a bolts hole, the holes 18a, the holes 18b, the holes 19b.
Specific implementation mode
Below in conjunction with attached drawing one embodiment that the present invention will be described in detail.
Embodiment 1
The embodiment of the present invention as shown in Figure 1, including sliding support 1, limit bearing 2, movable base 3, foundation platform 5,
Acceleration transducer 20, computer 21, dynamic signalling analysis system 22, power hammer sensor 23 into shape.
As shown in Figure 1, Figure 2, Figure 4 shows, sliding support 1 includes the identical support plate 6 of 2 block structures, rolling bearing 10, sliding branch
Support 11,2 hook bolts 12,13,4 pieces of diplopore clamping plate floor 7,2 limiting plate 14, flat base 8；Two 6 both sides of support plate
Symmetrically distinguish two floors 7 of arranged for interval up and down；Spacing is equal to 10 diameter of rolling bearing, spaced apart 2 floors 7 formation
Sliding rail 9；Rolling bearing 10 is mounted in sliding rail 9；Sliding support 11 is connected with rolling bearing 10；2 hooks
The hook portion of bolt 12 coordinates with limited support 15；2 12 tops of hook bolt and the hook bolt through hole of diplopore clamping plate 13 are matched
It closes；There are four mounting hole 8a for tool on flat base 8.
As shown in Figure 1, Figure 2, Figure 5, limit bearing 2 includes the identical support plate 6 of 2 block structures, rolling bearing 16, limit branch
Support 15,2 hook bolts 12, diplopore clamping plate 13, flat bases 8；There is 12 through hole of hook bolt on diplopore clamping plate 13；Rotation
Bearing 16 is mounted in support plate 6；Limited support 15 is connected with rolling bearing 16；The hook portion and limit of 2 hook bolts 12
15 cooperation of position support；2 12 tops of hook bolt and the hook bolt through hole of diplopore clamping plate 13 coordinate；Have on flat base 8
There are four mounting hole 8a；
As shown in Figure 1 and Figure 2, sliding support 11, limited support 15 are in a horizontal plane.
As shown in Fig. 2, the raised fixed pedestal in one end of foundation platform 54；4 formed by integrally casting of fixed pedestal is in ground
One end of platform 5；The other end has the hole 5a equal with the connecting hole 3a pitch-rows on movable base 3, constitutes a distribution hole
Group；Distribution hole group group number on foundation platform 5 is more than 1, the distribution of distribution hole group linear array；
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 6, Fig. 7, movable base 3, foundation platform 5 are concrete component；Foundation platform 5
It further include a metal ground bearing plate 17；Movable base includes two metal movable base bearing plates 18；Fixed pedestal
Including a metal fixed pedestal bearing plate 19；There are four connecting hole 3a for tool on 3 concrete component of movable base；Removable base
There is hole 18a identical with movable base pitch-row on seat bearing plate 18；Have and 5 pitch-row of foundation platform on ground bearing plate 17
Identical bolt hole 17a；Movable base bearing plate 18, fixed pedestal bearing plate 19 also have and sliding support 1, limit bearing
The identical hole 18b of 8 mounting hole 8a pitch-rows of flat base, hole 19b on 2；2 pieces of movable base bearing plates 18 are separately mounted to can
Mobile foundation upper surface and lower surface；Fixed pedestal bearing plate 19 is mounted on fixed pedestal upper surface；Fastener connection is removable
The hole 3a on hole 18a, movable base 3 on pedestal bearing plate 18, the 17 bolt hole 17a of ground bearing plate on foundation platform 5,
Sliding support 1 and movable base 3 are fastenedly connected on foundation platform 5；
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7；By changing the connecting hole 3a on movable base 3 and ground
The hole 5a link positions of based platform 5 change the distance between movable base 3, fixed pedestal 4；Sliding support 1 is fastenedly connected peace
On movable base 3；Limit bearing 2 is fastenedly connected on fixed pedestal 4；It can be according to test beam across footpath to removable
Pedestal 3 and sliding support 1 are adjusted and fix, and realize that sliding support 1, limit 2 spacing of bearing are adjusted；And it can be along sliding rail
9 movement rolling bearings 10, to sliding support 1,2 space fine-adjusting of limited support；After sliding support 1,2 spacing of limited support determine,
The identical right angled triangle limiting plate of two structures 14 is placed in rolling bearing 10 at the gap of sliding rail 9, is limited to bearing
It is fixed.Test beam is seated in sliding support 11, on limited support 16；Hook bolt 12 passes through the hook bolt 12 of diplopore clamping plate 13
Through hole, nut coordinate with hook bolt 12, nut compressing diplopore clamping plate 13, diplopore clamping plate 13 and sliding support 11, limit branch
Support 16 anchorage experiment beams；Acceleration transducer is arranged on the measuring point of test beam surface, and acceleration transducer 20, power hammer sensor 23 into shape
Dynamic signalling analysis system 22 is connected, and is connect with computer 21；Sensor 23 is hammered into shape by power applies dynamic load, you can
Carry out the self-vibration characteristic test of simply supported beam.
Operating procedure is as follows：
The first step, installation limit bearing, sliding support：
Limit bearing is fastenedly connected with fixed pedestal；Sliding support and mobile foundation are fastenedly connected；
Second step measures test beam beam length, adjusts movable base at a distance from fixed pedestal；
Third walks, and rolling bearing 10 on sliding support, mobile sliding support 11, fine tuning limit branch are moved along sliding rail 9
Seat 2, the sliding support 11 of sliding support 1,15 distance of limited support；
4th step limits rolling bearing 10：
By the identical right angled triangle limiting plate of two structures 14 be placed in rolling bearing 10 at the gap of sliding rail 9,
Until the sliding support 11 of connection rolling bearing 10 can not move.
5th step, test beam clamping：
Test beam both ends are respectively placed on sliding support and limit bearing, test beam is made to be in horizontality.
The hook bolt of sliding support and limited support both ends is disposed vertically, the unthreaded hole of diplopore clamping plate is directed at hook
Type bolt is used in combination the identical screw cap anchoring of 4 structures that test beam support end is made to fix.
6th step arranges acceleration transducer, carries out self-vibration characteristic test.
Acceleration transducer is arranged on the measuring point of test beam surface, by acceleration transducer and power hammer sensor access dynamic
The interface channel of signal testing analysis system, and computer 21 is connected, hammering sensor into shape by power applies dynamic load, carries out freely-supported
The self-vibration characteristic of beam is tested.
Embodiment 2
According to Fig. 1 ~ Fig. 7, on the basis of embodiment 1, realized by increasing movable base and sliding support
The self-vibration characteristic of continuous beam on many supports is tested with variable beam length simply supported beam and continuous beam self-vibration characteristic test platform.
Claims (2)
1. a kind of variable beam length simply supported beam and continuous beam self-vibration characteristic test platform；It is characterized in that：Including sliding support, limit
Bearing, movable base, fixed pedestal, foundation platform, acceleration transducer, computer, dynamic signalling analysis system, power
Hammer sensor into shape；There is connecting hole on movable base；The raised fixed pedestal in one end of foundation platform, the other end have with
The equal hole of connecting hole pitch-row on movable base, constitutes a distribution hole group；Distribution hole group group number on foundation platform is big
In 1, distribution hole group linear array is distributed；Fastener connects the hole on connecting hole and foundation platform on movable base, can
Mobile foundation is securedly mounted on foundation platform；By the hole connection position for changing connecting hole and foundation platform on movable base
It sets, changes the distance between movable base, fixed pedestal；Sliding support is fastenedly connected on movable base；Limit
Bearing is fastenedly connected on fixed pedestal；It includes the identical support plate of 2 block structures, rolling bearing, limit branch to limit bearing
Support, 2 hook bolts, diplopore clamping plate；There is hook bolt through hole on diplopore clamping plate；Rolling bearing is installed on the supporting plate；
Limited support is connect with bearing fit；The hook portion of 2 hook bolts coordinates with limited support；2 hook bolt tops and diplopore
The hook bolt through hole of clamping plate coordinates；Sliding support includes the identical support plate of 2 block structures, rolling bearing, sliding support, 2
A hook bolt, diplopore clamping plate, 4 pieces of floors, 2 limiting plates；Symmetrically distinguish arranged for interval two up and down in two support plate both sides
A floor；Spacing is equal to bearing diameter, and spaced apart 2 floors form sliding rail；Rolling bearing is mounted on sliding rail
It is interior；Sliding support, limited support are in a horizontal plane；Movable base and sliding support are adjusted according to test beam across footpath
It saves and fixed, and rolling bearing is moved along sliding rail, to sliding support, limited support space fine-adjusting；Sliding support, limit branch
After tie distance determines, the identical right angled triangle limiting plate of 2 structures is placed at the gap of bearing and sliding rail, is limited bearing
Position is fixed；Test beam is seated in sliding support, on limited support；Hook bolt passes through the hook bolt through hole of diplopore clamping plate,
Nut coordinates with hook bolt, nut compressing diplopore clamping plate, and diplopore clamping plate fixes test beam with sliding support, limited support；Add
Velocity sensor is arranged on the measuring point of test beam surface, and acceleration transducer, power hammer sensor connect dynamic signalling analysis
System, and with calculate mechatronics；Sensor is hammered into shape by power and applies dynamic load, you can carries out self-vibration characteristic test.
2. a kind of variable beam length simply supported beam according to claim 1 and continuous beam self-vibration characteristic test platform；Its feature exists
In：Foundation platform further includes ground bearing plate；Movable base includes movable base bearing plate；Fixed pedestal includes fixed base
Seat bearing plate；There is bolt hole identical with foundation platform pitch-row on ground bearing plate；On movable base bearing plate have with
The identical hole of movable base pitch-row；Movable base bearing plate, fixed pedestal bearing plate also have and sliding support, limit branch
Bore is away from identical hole；2 pieces of movable base bearing plates are separately mounted to movable base upper surface and lower surface；Fixed pedestal
Bearing plate is mounted on fixed pedestal upper surface；Fastener connect movable base bearing plate on hole, the hole on movable base,
Sliding support and movable base are fastenedly connected on foundation platform by the ground bearing plate bolt hole on foundation platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610623212.4A CN106289692B (en) | 2016-08-02 | 2016-08-02 | Variable beam length simply supported beam and continuous beam self-vibration characteristic test platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610623212.4A CN106289692B (en) | 2016-08-02 | 2016-08-02 | Variable beam length simply supported beam and continuous beam self-vibration characteristic test platform |
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| Publication Number | Publication Date |
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| CN106289692A CN106289692A (en) | 2017-01-04 |
| CN106289692B true CN106289692B (en) | 2018-08-10 |
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| CN201610623212.4A Expired - Fee Related CN106289692B (en) | 2016-08-02 | 2016-08-02 | Variable beam length simply supported beam and continuous beam self-vibration characteristic test platform |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489748B (en) * | 2018-03-23 | 2019-11-12 | 西安建筑科技大学 | A kind of experimental rig and test method for continuous bridge long period Study of Cyclic Loading |
| CN109868735B (en) * | 2019-03-28 | 2024-03-26 | 福州大学 | Test device and method for transporting, hoisting and loading bridge deck continuous structure test member |
| CN110646510A (en) * | 2019-10-09 | 2020-01-03 | 北京林业大学 | Nondestructive testing test bench and method for wooden component by knocking method |
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| AU2004222710A1 (en) * | 2004-10-19 | 2006-05-04 | Air2, Llc | Non-destructive testing of in-service wooden beams |
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| CN104655385A (en) * | 2014-12-31 | 2015-05-27 | 中国铁路总公司 | Railroad bridge substructure health status quantitative evaluation method |
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