CN207366338U - A kind of flexibility chain bar self-balancing is without shearing load testing machine - Google Patents
A kind of flexibility chain bar self-balancing is without shearing load testing machine Download PDFInfo
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- CN207366338U CN207366338U CN201721493964.XU CN201721493964U CN207366338U CN 207366338 U CN207366338 U CN 207366338U CN 201721493964 U CN201721493964 U CN 201721493964U CN 207366338 U CN207366338 U CN 207366338U
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- nut
- flexible chain
- slots
- chain bar
- bottom plate
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Abstract
The utility model discloses a kind of flexible chain bar self-balancing without shearing load testing machine, including I-shaped top plate, four ends of top plate offer four through slots, further include four flexible chain bars, four flexible chain pole lengths are identical and are parallel to each other, four through slots on top plate are stretched out in the upper end of flexible chain bar respectively, and are removably fixed in by nut outside through slot；The lower end of flexible chain bar is connected with two identical cuboid bottom plates, two through slots is offered on each bottom plate, four through slots on bottom plate are stretched out in the lower end of four flexible chain bars respectively, and are removably fixed in by nut outside the through slot of bottom plate.The utility model is rotated by the limited post of flexible chain bar both ends nut in nut bearing block, vertical load and lateral load is undertaken by four flexible chain bars, the deformation synchronous with the vertical load jack of test piece upper part of parallelogram force transfer system, examination body, realizes and vertical jack is acted on without shear load.
Description
Technical field
The utility model belongs to instrument industry technical field, is related to a kind of flexible chain bar self-balancing and is loaded without shearing
Experimental rig.
Background technology
As seismic activity frequent region occurs for west area, and the particularly Wenchuan earthquake on May 12nd, 2008 occurs
After, the requirement to structural seismic research and shock test technological means is also higher and higher.Earthquake simulation bumper experimental system
Can input-to-state stabilization failure under earthquake action in real time, yet with earthquake simulation test platform size, hold lotus and limited, generally use is small
Ratio reduced scale structural elements is tested, and has larger difference with entity structure.Pseudo can be relatively accurately anti-
Structure real stress and deformation state under geological process are reflected, slowly rather than periodically the full mistake of earthquake response of model configuration
Journey.Pseudo-static experimental controls (or Deformation control) to apply low cyclic loading to examination body by load, makes examination body from elastic stage
Until destroying overall process experiment, research building structural element, node and model structure or prototype structure are in low cycle repetitive load
Anti-seismic performance under effect.
Pseudo-static experimental influences caused change without considering strain rate, and the experimental result that different experiments room obtains is easy
It is compared, domestic and international colleges and universities and scientific research institution have carried out substantial amounts of research, using two-door frame, counter force wall, electro-hydraulic servo testing
The equipment such as system, vertical voltage-stabilizing system and device are tested.Body is tried by the jack pair being fixed on door frame crossbeam to apply
Vertical load, sets the flat guide of rolling guide or contact surface for polytetrafluoroethylene material, to examination between door frame and jack
When body applies low cycle repetitive load, vertical jack is slided along guide rail with the deformation of examination body, when vertical load is larger, is erected
The frictional force produced to load between rolling guide and door frame cross beam contacting surface is reversely applied to very heavy top/bottom part, causes jack
Bear vertical load and bear horizontal loading at the same time, cause jack oil leak sealing oil to destroy, larger, the current specifications of vertical load variation
《Building aseismicity testing regulations》JGJ/T101-2015 has carried out stringent limitation to rail friction coefficient.
In addition, existing experimental rig assembling is complicated, it is necessary to adjust beam height when examination body height change is larger, work
Measure larger, and to test site heavy dependence, experimental scale is also larger, and it is real to be not suitable for undergraduate course process middle school student hands-on
Trample.
The content of the invention
For in the prior art the defects of and deficiency, the utility model provide a kind of flexible chain bar self-balancing without shearing plus
Experimental rig is carried, overcomes the horizontal shear load produced in existing pseudo static testing device to produce the vertical loading component of rigidity broken
Bad the defects of.
To reach above-mentioned purpose, the utility model takes following technical solution：
A kind of flexibility chain bar self-balancing is without shearing load testing machine, including I-shaped top plate, four ends of top plate
Offer four through slots, through slot penetrates through the upper and lower surface of top plate, and the central point lines of four through slots is rectangle, and institute
The rectangle of formation it is each while with place top plate while be parallel to each other；Further include four flexible chain bars, four flexible chain pole length phases
Together and it is parallel to each other, four through slots on top plate are stretched out in the upper end of flexible chain bar respectively, and are detachably fixed by nut
In outside through slot；
The lower end of flexible chain bar is connected with two identical cuboid bottom plates, and two through slots are offered on each bottom plate,
Four through slots on bottom plate are located at the underface of four through slots on top plate respectively, and four through slots on bottom plate are all
It is parallel to each other with four through slots on top plate；Four through slots on bottom plate are stretched out in the lower end of four flexible chain bars respectively, and
It is removably fixed in by nut outside the through slot of bottom plate；
The center of the lower section of the top plate is provided with jack.
The utility model also has following distinguishing feature：
The nut both ends are machined with cylindrical limited post, and the limited post at nut both ends is located along the same line, in spiral shell
Nut bearing block is equipped between female and through slot, the both sides of two long sides of each through slot are fixed on below nut bearing block,
The upper end of nut bearing block is to be respectively erected in nut along the symmetrically arranged arc-shaped opening of through slot, two limited posts of nut
In two arc openings of bearing block.
The flexible chain bar is by adjustment screw, load transducer, screw, silk braid, pull rod, adjusting nut and adjustment screw
Axial series form, wherein, T-shaped connection is used between screw and silk braid, is connected through a screw thread between remaining each component.
Bottom plate is fixed on geosyncline by foundation bolt, and bottom plate lower part is equipped with pedestal.
The jack is connected with the oil pipe of voltage stabilizing component.
Test specimen is installed below the jack.
The screw rod of horizontal direction is equipped with the top of the test specimen, screw rod passes through test specimen top, and stretches out test specimen in screw rod
Both ends be respectively mounted test specimen distal end steel plate and nut, the test specimen distal end steel plate that test specimen passes through side connects the transition of horizontal direction
Part, transition piece connect the horizontal actuator of horizontal direction, and the other end of horizontal actuator is fixed by horizontal guide rail and T-bolt
On counter force wall, the bottom of test specimen is fixed in the horizontal geosyncline on testing stand by press beam and foundation bolt.
Compared with prior art, beneficial has the technical effect that the utility model：
The flexible chain bar self-balancing of the utility model is parallel, adjustable in length by four without shearing load testing machine
Bottom plate, the top plate of flexible chain bar connection experimental provision, realize self-balanced loading, and adjusting flexible chain pole length can quickly adapt to
The height of test specimen.By the length of adjustment screw in flexible chain bar adjusting nut or the length adjustment flexibility chain bar of pull rod screw and
The value of thrust of each chain bar, device can be with quick centrings.
During horizontal loads experiment, turned by the limited post of flexible chain bar both ends nut in nut bearing block
Parallelogram law that is dynamic, being synthesized according to power, the water that the vertical load that vertical voltage stabilizing component produces applies with horizontal actuator
Flat load is fully undertaken by four flexible chain bars, parallelogram force transfer system, examination body and the test specimen that four flexible chain bars are formed
The vertical load jack on top synchronously deforms, and realizes and vertical jack is acted on without shear load, solve existing guide rail and be servo-actuated
During influence of the frictional force to horizontal loading and experimental rig, and horizontal shear load (frictional force) is in rigid loading device
The destruction of vertical jack, realizes without the synchronous deformation of friction.
The flexible chain bar self-balancing of the utility model changes traditional pseudo-static experimental side without shearing load testing machine
Method theory, substitutes existing door frame column, flexible chain bar both ends nut is fixed on device using the flexible chain bar of adjustable length
In nut bearing block on the upside of baseplate underside, top plate, device bottom plate is affixed in geosyncline by foundation bolt, in order to ensure
Device rotates, and device bottom plate lower part sets pedestal.
Load transducer is installed in the vertical flexible chain bar of the utility model, vertical load is constant and test specimen vertical deformation
When smaller, the rotating angle of flexible chain bar can be calculated according to the deformation of the coupon level of test, height of specimen, can be counted in real time
Calculate the horizontal loading that flexible chain bar undertakes.
The flexible chain bar self-balancing of the utility model tries undergraduate course without the miniaturization of shearing load testing machine, judicial convenience
Test development pseudo-static experimental research to be possibly realized, realize that undergraduate course tests process by being further applied load manually to hydraulic jack
Middle pseudo-static experimental technique study and teaching practice.
Brief description of the drawings
Overall structure diagram when Fig. 1 is utility model works；
Fig. 2 is the front view of the utility model；
Fig. 3 is the top view of the utility model；
Fig. 4 is the left view of the utility model；
Fig. 5 is the nut schematic diagram of the utility model；
Fig. 6 is the schematic diagram of the nut bearing block of the utility model；
Fig. 7 is the experiment process schematic of the utility model；
Fig. 8 is the flexible chain rod structure schematic diagram of the utility model；
Each label is expressed as in figure:1- top plates, 2- flexibility chain bars, 3- bottom plates, 4- through slots, 5- nuts, 6- jack, 7-
Nut bearing block, 8- pedestals, 9- test specimens, the horizontal actuator of 10-；11- press beams, 12- test specimens distal end steel plate, 13- screw rods, 14- spiral shells
Cap, 15- horizontal guide rails, 16- foundation bolts, 17- counter force walls, 18- testing stands, 19- transition pieces, 20-T type bolts；
(2-1)-adjustment screw, (2-2)-load transducer, (2-3)-screw, (2-4) silk braid, (2-5)-pull rod, (2-
6)-adjusting nut；
(5-1)-limited post；
(7-1)-bolt.
The utility model is illustrated below in conjunction with specification drawings and specific embodiments.
Embodiment
As shown in Figures 1 to 6, a kind of flexible chain bar self-balancing is without shearing load testing machine, including I-shaped top plate
1, four ends of top plate 1 offer four through slots 4, and through slot 4 penetrates through the upper and lower surface of top plate 1, in four through slots 4
Heart point line is rectangle, and the rectangle formed it is each while with place top plate 1 while be parallel to each other；Further include four flexible chains
Bar 2, four 2 length of flexible chain bar are identical and are parallel to each other, and four that the upper end of flexible chain bar 2 is stretched out on top plate 1 respectively are passed through
Straight slot 4, and be removably fixed in by nut 5 outside through slot 4；The lower end of flexible chain bar 2 is connected with two identical cuboids
Bottom plate 3, offers two through slots 4 on each bottom plate 3, and four respectively on top plate 1 of four through slots 4 on bottom plate are passed through
The underface of straight slot 4, and four through slots 4 on bottom plate 3 are all parallel to each other with four through slots 4 on top plate 1；Four soft
Four through slots 4 on bottom plate are stretched out in the lower end of property chain bar 2 respectively, and the through slot of bottom plate 3 is removably fixed in by nut 5
Outside 4；The center of the lower section of top plate 1 is provided with jack 6.
The flexible chain bar self-balancing of the utility model is parallel, adjustable in length by four without shearing load testing machine
Flexible chain bar 2 connects bottom plate 3, the top plate 1 of experimental provision, realizes self-balanced loading, and adjusting 2 length of flexible chain bar can be rapidly
Adapt to the height of test specimen 9.The length of chain bar is finely tuned by flexible 2 adjusting nut internal thread length of chain bar, device can be quickly right
In.During horizontal loads experiment, turned by the limited post 5-1 of 2 bar of flexible chain, two end nut 5 in nut bearing block 7
Parallelogram law that is dynamic, being synthesized according to power, what the vertical load that vertical voltage stabilizing component produces applied with horizontal actuator 10
Horizontal loading is fully undertaken by four flexible chain bars 2, parallelogram force transfer system that four flexible chain bars 2 are formed, examination body 9 with
The synchronous deformation of vertical load jack 6 on 9 top of test specimen, realizes and vertical jack 6 is acted on without shear load, solve existing lead
Influence of the frictional force to horizontal loading and experimental rig in rail servomechanism process, and horizontal shear load (frictional force) is to rigid loading
The destruction of vertical jack in device, realizes without the synchronous deformation of friction.
Above-mentioned technical proposal is deferred to, specific embodiment of the utility model is given below, it is necessary to which explanation is that this practicality is new
Type is not limited to specific examples below, and it is new that all equivalents done on the basis of technical scheme each fall within this practicality
The protection domain of type.The utility model is described in further details with reference to embodiment.
Embodiment 1：
As shown in Figures 1 to 6, a kind of flexible chain bar self-balancing is without shearing load testing machine, including I-shaped top plate 1,
Four ends of top plate 1 offer four through slots 4, and through slot 4 penetrates through the upper and lower surface of top plate 1, the center of four through slots 4
Point line be rectangle, and the rectangle formed it is each while with place top plate 1 while be parallel to each other；Further include four flexible chain bars
2, four 2 length of flexible chain bar are identical and are parallel to each other, and four perforations on top plate 1 are stretched out in the upper end of flexible chain bar 2 respectively
Groove 4, and be removably fixed in by nut 5 outside through slot 4；The lower end of flexible chain bar 2 is connected with two identical cuboid bottoms
Plate 3, offers two through slots 4 on each bottom plate 3, and four respectively on top plate 1 of four through slots 4 on bottom plate 3 are passed through
The underface of straight slot 4, and four through slots 4 on bottom plate 3 are all parallel to each other with four through slots 4 on top plate 1；Four soft
Four through slots 4 on bottom plate 3 are stretched out in the lower end of property chain bar 2 respectively, and the perforation of bottom plate 3 is removably fixed in by nut 5
Outside groove 4；The center of the lower section of top plate 1 is provided with jack 6.
In the present embodiment, 5 both ends of nut are machined with cylindrical limited post 5-1, and the limited post 5-1 at 5 both ends of nut is positioned at same
On one straight line, nut bearing block 7 is equipped between nut 5 and through slot 4, nut bearing block 7 is fixed on each by bolt 7-1
The both sides of two long sides of through slot 4, the upper end of nut bearing block 7 is along the symmetrically arranged arc-shaped opening of through slot 4, nut
5 two limited post 5-1 are respectively erected in two arc openings of nut bearing block 7.During horizontal loads experiment,
Rotated by the limited post 5-1 of flexible 2 liang of end nuts 5 of chain bar in nut bearing block 7, the parallelogram method synthesized according to power
Then, the horizontal loading that the vertical load that vertical voltage stabilizing component produces applies with horizontal actuator 10 is fully by four flexible chain bars 2
Undertake, parallelogram force transfer system, examination body 9 and the vertical load jack 6 on 9 top of test specimen that four flexible chain bars 2 are formed
Synchronous deformation, realizes and vertical jack 6 is acted on without shear load.
Specifically, bottom plate 3 is fixed on geosyncline by foundation bolt, in order to ensure that device rotates, 3 lower part of bottom plate is equipped with
Pedestal 8.
Jack 6 is connected with the oil pipe of voltage stabilizing component, so that jack 6 produces vertical load.
Test specimen 9 is installed on the lower section of jack 6, carries the vertical load that vertical voltage stabilizing component produces.
Specifically, the top of test specimen 9 is equipped with the screw rod 13 of horizontal direction, screw rod 13 passes through 9 top of test specimen, and in screw rod 13
The both ends for stretching out test specimen 9 are respectively mounted test specimen distal end steel plate 12 and nut 14, and test specimen 9 is connected by the test specimen distal end steel plate 12 of side
The transition piece 19 of horizontal direction, transition piece 19 connect the horizontal actuator 10 of horizontal direction, and the other end of horizontal actuator 10 leads to
Cross horizontal guide rail 15 and T-bolt 20 is fixed on counter force wall 17, horizontal actuator 10 applies horizontal loading, the bottom of test specimen 9
It is fixed on by press beam 11 and foundation bolt 16 in the horizontal geosyncline on testing stand 18.
In the present embodiment, flexible chain bar 2 is by adjustment screw 2-1, load transducer 2-2, screw 2-3, silk braid 2-4, drawing
Bar 2-5, adjusting nut 2-6 and adjustment screw 2-1 axial series form, wherein, T-shaped company is used between screw 2-3 and silk braid 2-4
Connect, be connected through a screw thread between remaining each component.Assembling between flexible chain bar each several part, installation, convenient disassembly.Load passes
Sensor can show the load that each rod piece is subject in real time, facilitate test specimen physics to neutralizing geometry centering.
The experiment set-up procedure of the utility model is as follows：
Bottom plate 3 is fixed on horizontal channel by pedestal 8, foundation bolt 16 first, lifting test specimen 9 arrives experimental site,
Lifting top plate 1 arrives 9 surface of test specimen, and connecting flexible 2 bottom nut 5 of chain bar and rotating flexible chain bar 2 makes the limited post 5-1 of nut 5
Rotation direction of principal axis it is consistent with the arc opening of nut bearing block 7,1 upper nut 5 of installation loading top plate and flexible chain bar 2,
Four flexible chain bars 2 are after installation is complete, and rotating flexible chain bar 2 makes its lap of splice between nut 5 suitable, four flexible chain bars
Load transducer numerical value is consistent on 2, and experiment loading device completes installation, connects the oil pipe of voltage stabilizing component to vertical jack
6, connect test specimen 9 and horizontal actuator 10, connection displacement sensor, load transducer to collecting device, you can proceed by examination
Test loading.By data acquisition, the test piece deformation (displacement, strain) during testing and corresponding load can be recorded in real time
Effect, the bearing capacity of component when analyzing pseudo-static experimental.Test in loading procedure and loading is filled using crane or other components
Top set plate 1 is protected, and avoids the loading experiment later stage unexpected abnormal deformation of test specimen from causing to damage to test device and experimenter.
Claims (7)
1. a kind of flexibility chain bar self-balancing is without shearing load testing machine, it is characterised in that including I-shaped top plate (1), top
Four ends of plate (1) offer four through slots (4), the upper and lower surface of through slot (4) perforation top plate (1), four through slots
(4) central point line is rectangle, and the rectangle formed it is each while with place top plate (1) while be parallel to each other；Further include
Four flexible chain bars (2), four flexible chain bar (2) length are identical and are parallel to each other, and the upper end of flexible chain bar (2) is stretched out respectively
Four through slots (4) on top plate (1), and through slot (4) is removably fixed in outside by nut (5)；
The lower end of flexible chain bar (2) is connected with two identical cuboid bottom plates (3), and offering two on each bottom plate (3) passes through
Straight slot (4), the underface of four through slots (4) on bottom plate (3) four through slots (4) on top plate (1) respectively, and
Four through slots (4) on bottom plate (3) are all parallel to each other with four through slots (4) on top plate (1)；Four flexible chain bars (2)
Lower end stretch out four through slots (4) on bottom plate (3) respectively, and the perforation of bottom plate (3) is removably fixed in by nut (5)
Groove (4) is outside；
The center of the lower section of the top plate (1) is provided with jack (6).
2. device as claimed in claim 1, it is characterised in that described nut (5) both ends are machined with cylindrical limited post (5-
1), the limited post (5-1) at nut (5) both ends is located along the same line, and nut shaft is equipped between nut (5) and through slot (4)
The both sides of two long sides of each through slot (4) are fixed in bearing (7), nut bearing block (7) lower section, nut bearing block (7)
Upper end is to be respectively erected in nut along the symmetrically arranged arc-shaped opening of through slot (4), two limited posts (5-1) of nut (5)
In two arc openings of bearing block (7).
3. device as claimed in claim 1, it is characterised in that the flexible chain bar (2) is by adjustment screw (2-1), load
Sensor (2-2), screw (2-3), silk braid (2-4), pull rod (2-5), adjusting nut (2-6) and adjustment screw (2-1) are axially gone here and there
Connection forms, wherein, T-shaped connection is used between screw (2-3) and silk braid (2-4), is connected through a screw thread between remaining each component.
4. device as claimed in claim 1, it is characterised in that bottom plate (3) is fixed on geosyncline by foundation bolt, bottom plate
(3) lower part is equipped with pedestal (8).
5. device as claimed in claim 1, it is characterised in that the jack (6) is connected with the oil pipe of voltage stabilizing component.
6. device as claimed in claim 1, it is characterised in that be provided with test specimen (9) below the jack (6).
7. device as claimed in claim 6, it is characterised in that the screw rod of horizontal direction is equipped with the top of the test specimen (9)
(13), screw rod (13) passes through test specimen (9) top, and is respectively mounted test specimen distal end steel at the both ends of screw rod (13) stretching test specimen (9)
Plate (12) and nut (14), test specimen (9) connect the transition piece (19) of horizontal direction, mistake by the test specimen distal end steel plate (12) of side
Cross the horizontal actuator (10) of part (19) connection horizontal direction, the other end of horizontal actuator (10) by horizontal guide rail (15) and
T-bolt (20) is fixed on counter force wall (17), and the bottom of test specimen (9) is fixed on examination by press beam (11) and foundation bolt (16)
Test in the horizontal geosyncline on platform (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721493964.XU CN207366338U (en) | 2017-11-10 | 2017-11-10 | A kind of flexibility chain bar self-balancing is without shearing load testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721493964.XU CN207366338U (en) | 2017-11-10 | 2017-11-10 | A kind of flexibility chain bar self-balancing is without shearing load testing machine |
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| Publication Number | Publication Date |
|---|---|
| CN207366338U true CN207366338U (en) | 2018-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721493964.XU Expired - Fee Related CN207366338U (en) | 2017-11-10 | 2017-11-10 | A kind of flexibility chain bar self-balancing is without shearing load testing machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540650A (en) * | 2018-12-05 | 2019-03-29 | 河海大学 | A kind of modular multi-function self-balancing reaction frame loading device and its application method |
| CN109540679A (en) * | 2018-11-26 | 2019-03-29 | 山东交通学院 | For the antivibration of bridge member, stretching experiment system and adjustable base |
| CN109682693A (en) * | 2019-02-27 | 2019-04-26 | 沈阳众和检测有限公司 | Architectural vibration-insulation rubber tube tangential displacement test device |
| CN109799151A (en) * | 2019-03-24 | 2019-05-24 | 华北理工大学 | The controllable horizontal reciprocating load testing machine of deformation and its test method |
| CN112179789A (en) * | 2020-11-13 | 2021-01-05 | 福州大学 | Assembled connecting piece shearing experiment device and using method |
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2017
- 2017-11-10 CN CN201721493964.XU patent/CN207366338U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540679A (en) * | 2018-11-26 | 2019-03-29 | 山东交通学院 | For the antivibration of bridge member, stretching experiment system and adjustable base |
| CN109540679B (en) * | 2018-11-26 | 2023-10-27 | 山东交通学院 | Vibration-proof and stretching experiment system for bridge member and adjustable base |
| CN109540650A (en) * | 2018-12-05 | 2019-03-29 | 河海大学 | A kind of modular multi-function self-balancing reaction frame loading device and its application method |
| CN109540650B (en) * | 2018-12-05 | 2021-05-11 | 河海大学 | Modular multifunctional self-balancing reaction frame loading device and application method thereof |
| CN109682693A (en) * | 2019-02-27 | 2019-04-26 | 沈阳众和检测有限公司 | Architectural vibration-insulation rubber tube tangential displacement test device |
| CN109799151A (en) * | 2019-03-24 | 2019-05-24 | 华北理工大学 | The controllable horizontal reciprocating load testing machine of deformation and its test method |
| CN109799151B (en) * | 2019-03-24 | 2023-11-17 | 华北理工大学 | Deformation-controllable horizontal reciprocating loading test device and test method thereof |
| CN112179789A (en) * | 2020-11-13 | 2021-01-05 | 福州大学 | Assembled connecting piece shearing experiment device and using method |
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Granted publication date: 20180515 Termination date: 20201110 |