CN105466758B - The loading device and method that frictional influence can be eliminated and column axial force can be controlled - Google Patents
The loading device and method that frictional influence can be eliminated and column axial force can be controlled Download PDFInfo
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- CN105466758B CN105466758B CN201510795909.5A CN201510795909A CN105466758B CN 105466758 B CN105466758 B CN 105466758B CN 201510795909 A CN201510795909 A CN 201510795909A CN 105466758 B CN105466758 B CN 105466758B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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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
- G01M99/00—Subject matter not provided for in other groups of this subclass
Abstract
It is an object of the present invention to provide a kind of loading device and method that eliminates frictional influence and can be controlled to column axial force, solve in the prior art, the problem of friction effects result of the test accuracy and column axial force can not be kept constant, make the result that measures more accurate.So that when the anti-seismic performance for beam-column subassemblage, frame column is tested, in the case that method by applying low cycle repetitive load in capital obtains capital horizontal force and horizontal displacement (P Δs) relation curve and the nonlinear deformation in node area, beam-column subassemblage, the entirety of frame column and the deformation of part and the relation of horizontal force are more accurate.
Description
Technical field
The present invention relates to the Study on behavior of beam-column subassemblage and frame column, be specifically one kind can eliminate frictional influence and
Loading device can be controlled to column axial force.
Background technology
Bean column node, frame column are the significant points of stress performance complexity in reinforced concrete structure, particularly on ground
During shake, its anti-seismic performance plays a crucial role integrally-built anti-seismic performance.At present both at home and abroad to beam column group
In terms of the fit, research of frame column stress performance is concentrated mainly on experimental research and numerical simulation two, and the standard of experimental study
True property plays irreplaceable effect to the force-mechanism of understanding bean column node, frame column and hysteresis response feature etc..For beam
The Experimental Study on Seismic Behavior of column combination body, frame column, the method for being typically employed in capital application low cycle repetitive load (are known as styletable to add
Carry experiment) capital horizontal force and horizontal displacement (P- Δs) relation curve and the nonlinear deformation situation in node area are obtained, to grind
Study carefully the deformation of beam-column subassemblage, the entirety of frame column and part.In addition, beam-column subassemblage experiment, frame column are required to consider axis
The influence that power reacts its hysteresis, therefore need to apply a constant axle power to column in testing.
The problem is illustrated by taking the beam-column subassemblage experiment of styletable loading as an example.It is primarily present two class styletables both at home and abroad
The beam-column subassemblage experimental rig of loading, but there are certain error for both experimental rigs.
The advantages of first kind experimental rig is to pass through the control to hydraulic jack or vertical actuator during experiment
System, experimenter can be adjusted in time taking human as the size of adjustment column axle power when axle power changes, to ensure whole examination
Axle power is kept constant during testing；And the shortcomings that this kind of experimental rig, is hydraulic jack or vertical actuator during testing
The axle power of application is usually larger, and the hinge shaft that is connected with counter force system or sliding machine will be caused to produce larger rub accordingly
Power is wiped, the horizontal force measured is at this moment tested and just contains this partial frictional power, so as to influence to test the accuracy of measured result.
The advantages of second class experimental rig is to be applied during experiment by tightening the bolt on component upper and lower side steel plate
Axle power needed for experiment, there is no friction between test specimen and counter force system, therefore the measured value of horizontal loading P is more accurate；And this
The shortcomings that class experimental rig is that the axle power of pillar normally only applies before on-test, and pillar axle power becomes during experiment
It can not be adjusted or compensated in time during change so that axle power can not remain unchanged during whole experiment.
In conclusion existing two kinds of experimental rigs all have error to a certain extent, experiment number can not be accurately measured
According to.
The content of the invention
Present invention aim to address friction effects in existing loading device are big and the problem of column axial force is unable to control.
To realize that the technical solution that the object of the invention uses is such, can eliminate frictional influence and can to column axial force into
The loading device of row control, it is characterised in that：Including reaction beam, counter-force column, vertical actuator, pull pressure sensor I, horizontal work
Dynamic device, pull pressure sensor II, pull pressure sensor III, test specimen, hinge shaft, positioning seat I, positioning seat II, attachment device I, connection
Device II and fixing device.
The test specimen is " ten " font beam-column subassemblage frame, and the beam-column subassemblage frame is divided into up and down four
Branch, four cross sections of the test specimen are rectangle.
The reaction beam and counter-force column are steel structure support, and the both ends of the reaction beam are separately fixed at two counter-force columns
On.The fixing device includes steel plate I, steel plate II, steel plate III, threaded rod I, threaded rod II, threaded rod III, threaded rod IV.
The sensor and test specimen are fixed with fixing device, and specific fixed form is：One end face of the sensor with
Steel plate I connects, another end face of sensor connects with steel plate II.The upper branch of the test specimen connects with steel plate II, under test specimen
Branch connects with steel plate III.The threaded rod I, threaded rod II, threaded rod III, threaded rod IV sequentially pass through steel plate I, steel from top to bottom
Plate II, steel plate III, and tightened on the end face of steel plate I and steel plate III with nut.
The steel plate III is connected with level ground by hinge shaft, as shown in figure 4, the hinge shaft includes three pieces fanning strip and company
Spindle, the shape size of three fanning strips is consistent and is stacked together, and the fanning strip symmetry axis is equipped with through hole, described
Connecting shaft sequentially passes through the through hole of three fanning strips, and three fanning strips are hinged, and tightens connection shaft tail end with nut,
The fanning strip in the centre position is fixed on steel plate III, and the fanning strip of both sides fixes on the ground；
Described I one end of pull pressure sensor is connected with steel plate I by hinge shaft, the hinge shaft and hinge shaft shape and structure one
Cause, one end of the vertical actuator of I other end of pull pressure sensor is connected.
The other end of the vertical actuator is connected with attachment device I, and the attachment device I is by hinge shaft, threaded rod and steel
Plate forms, and the steel plate is placed on reaction beam position symmetrical above and below, the two panels steel plate by four threaded rods from top to bottom according to
Secondary to pass through, two panels steel plate is tightened by nut, and the stud connection is on the steel plate below reaction beam, the hinge shaft and hinge shaft shape
Unanimously.
One end of the horizontal actuator is connected with attachment device II, the composition of the attachment device II and attachment device I
Consistent with shape, two pieces of Interal fixations of attachment device II are on counter-force column.
The other end of the horizontal actuator is connected with one end of pull pressure sensor II, the pull pressure sensor II
The upper branch of other end test specimen is connected, and attachment device is consistent with attachment device II.
The positioning seat I and II shape of positioning seat are consistent with structure, and position is symmetrical relative to the lower branch of test specimen.
The positioning seat I and positioning seat II include base, roller ball hinge device, supporting rod and attachment device, the roller bearing
Flexural pivot device is located at base top center, and described supporting rod one end is connected with roller ball hinge device, the supporting rod other end and company
Connection device is connected, and the attachment device is consistent with I shape of attachment device and structure, and the attachment device of positioning seat I is connected to test specimen
Left branch on, the attachment device of the positioning seat II is connected in the right branch of test specimen, the connection of the positioning seat I and positioning seat II
The link position of device relative to test specimen up and down two it is symmetrical.
Frictional influence and the loading for the loading device that can be controlled to column axial force are eliminated using described in claim 1
Method, it is characterised in that comprise the following steps：
1) longitudinal end of test specimen is fixed between steel plate II and steel plate III, transverse ends are separately fixed at I He of positioning seat
On the supporting rod of positioning seat II；
2) bolt on steel plate I and steel plate III is tightened using electronics torque-indicating wrencg, applies experiment institute in this way
The column axial force needed；
3) by horizontal actuator, the capital horizontal force needed for experiment is applied to test specimen, and vertical actuator does not apply
Active force；
4) after the completion of step 3), when column axial force is decreased or increased, pressure or pulling force are applied by vertical actuator, it is right
Column axial force is adjusted, until pull pressure sensor III is equal with initial axle power.
The process of adjustment is, if column axial force is reduced with respect to initial value, just with vertical actuator apply one downwards
Pressure, increases axle power；If column axial force becomes larger with respect to initial value, a upward drawing is just applied by vertical actuator
Power, makes mass action reduce in the axle power of pillar.
Further, the test specimen is tried for " ten " font intermediate layer intermediate node, " ├ " shape intermediate layer mid-side node and pillar
Test equally applicable.
Further, four cross sections of the test specimen are for circular, "T"-shaped equally applicable.
The solution have the advantages that unquestionable, the device in the present invention, the capital horizontal loading measured is rubbed
The influence of power is very small, and experimenter can substantially increase experiment with the size of autonomous control axial force in experimentation
The accuracy of measured data.
Brief description of the drawings
Fig. 1 is the experimental rig schematic diagram of the present invention；
Fig. 2 is the top view of steel plate 8；
Fig. 3 is the experimental rig schematic diagram of " ├ " shape intermediate layer mid-side node；
Fig. 4 is the schematic diagram of hinge shaft.
In figure：Reaction beam 1, counter-force column 2, vertical actuator 3, pull pressure sensor I 4, horizontal actuator 5, pressure pass
Sensor II 6, pull pressure sensor III 7, steel plate I 8, steel plate II 9, steel plate III 10, threaded rod I 11, threaded rod II 12, threaded rod III
13, threaded rod IV 14, test specimen 15, hinge shaft 16, positioning seat I 17, positioning seat II 18, attachment device I 19, attachment device II 20, Gu
Determine device 21.
Embodiment
With reference to embodiment, the invention will be further described, but should not be construed the above-mentioned subject area of the present invention only
It is limited to following embodiments.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and used
With means, various replacements and change are made, should all be included within the scope of the present invention.
The loading device and method that frictional influence can be eliminated and column axial force can be controlled, it is characterised in that：Including anti-
Power beam 1, counter-force column 2, vertical actuator 3, pull pressure sensor I 4, horizontal actuator 5, pull pressure sensor II 6, pressure pass
Sensor III 7, test specimen 15, hinge shaft 16, positioning seat I 17, positioning seat II 18, attachment device I 19, attachment device II 20 and fixing device
21。
The test specimen 15 is " ten " font beam-column subassemblage frame, and the beam-column subassemblage frame is divided into up and down
Four, four cross sections of the test specimen 15 are rectangle.
The reaction beam 1 and counter-force column 2 are steel structure support, and the both ends of the reaction beam 1 are separately fixed at two instead
On power column 2.
The fixing device 21 includes steel plate I 8, steel plate II 9, steel plate III 10, threaded rod I 11, threaded rod II 12, threaded rod
III 13, threaded rod IV 14.
The pull pressure sensor III 7 and test specimen 15 are fixed with fixing device 21, and specific fixed form is：The pressure
One end face of sensor III 7 connects with steel plate I 8, another end face of pull pressure sensor III 7 connects with steel plate II 9.It is described
The upper branch of test specimen 15 connects with steel plate II 9, and the lower branch of test specimen 15 connects with steel plate III 10.The threaded rod I 11, threaded rod II
12nd, threaded rod III 13, threaded rod IV 14 sequentially pass through steel plate I 8, steel plate II 9, steel plate III 10 from top to bottom, and in I 8 He of steel plate
Tightened on the end face of steel plate III 10 with nut.
The steel plate III 10 is connected with level ground by hinge shaft 16, and the hinge shaft 16 includes three pieces fanning strip and connection
Axis, the shape size of three fanning strips is consistent and is stacked together, and the fanning strip symmetry axis is equipped with through hole, the company
The through hole that spindle sequentially passes through three fanning strips is hinged by three fanning strips, and tightens connection shaft tail end, institute with nut
The fanning strip for stating centre position is fixed on steel plate III 10, and the fanning strip of both sides fixes on the ground；
Described I 4 one end of pull pressure sensor is connected with steel plate I 8 by hinge shaft, the hinge shaft and 16 shape of hinge shaft and structure
Unanimously, one end of the vertical actuator 3 of I 4 other end of pull pressure sensor is connected.
The other end of the vertical actuator 3 is connected with attachment device I 19, and the attachment device I 19 is by hinge shaft, threaded rod
Formed with steel plate, the steel plate is placed on the position symmetrical above and below of reaction beam 1, the two panels steel plate by four threaded rods on to
Under sequentially pass through, two panels steel plate is tightened by nut, the stud connection on the steel plate below reaction beam 1, the hinge shaft with hinge
16 shape of axis is consistent.
One end of the horizontal actuator 5 is connected with attachment device II 20, the attachment device II 20 and attachment device I 19
Composition it is consistent with shape, two pieces of Interal fixations of attachment device II 20 are on counter-force column 2.
The other end of the horizontal actuator 5 is connected with one end of pull pressure sensor II 6, the pull pressure sensor II
The upper branch of 6 other end test specimen 15 is connected, and attachment device is consistent with attachment device II 20.
The positioning seat I 17 and II 18 shape of positioning seat are consistent with structure, and position is symmetrical relative to the lower branch of test specimen 15.
The positioning seat I 17 and positioning seat II 18 include base, roller ball hinge device, supporting rod and attachment device, described
Roller ball hinge device is located at base top center, and described supporting rod one end is connected with roller ball hinge device, the supporting rod other end
It is connected with attachment device, the attachment device is consistent with I 19 shape of attachment device and structure, and the attachment device of positioning seat I 17 connects
It is connected in the left branch of test specimen 15, the attachment device of the positioning seat II 18 is connected in the right branch of test specimen 15, the positioning seat I 17
With the link position of the attachment device of positioning seat II 18 relative to test specimen 15 up and down two it is symmetrical.
Using the above-mentioned loading method for eliminating frictional influence and the loading device that can be controlled to column axial force, it is special
Sign is, comprises the following steps：
1) longitudinal end of test specimen 15 is fixed between steel plate II 9 and steel plate III 10, transverse ends are separately fixed at positioning
On the supporting rod of seat I 17 and positioning seat II 18；
2) bolt on steel plate I 8 and steel plate III 10 is tightened using electronics torque-indicating wrencg, applies experiment in this way
Required column axial force；
3) by horizontal actuator 5, the capital horizontal force needed for experiment is applied to test specimen, and vertical actuator 3 is not applied
Add active force；
4) after the completion of step 3), when column axial force is decreased or increased, pressure or pulling force are applied by vertical actuator 3,
Column axial force is adjusted, until pull pressure sensor III 7 is equal with initial axle power.
The process of adjustment is, if column axial force is reduced with respect to initial value, just with vertical actuator apply one downwards
Pressure, increases axle power；If column axial force becomes larger with respect to initial value, a upward drawing is just applied by vertical actuator
Power, makes mass action reduce in the axle power of pillar.
During experiment, since reason, the column axial force such as column inclination and screw rod, bolt stress relaxation will generally subtract
Small (incipient stage may also slightly become larger), applies pulling force or pressure, timely by the vertical actuator in top to pillar at this time
Column axial force is adjusted, the constant of axle power is kept by force snesor during experiment.
Therefore, in new experimental rig, most of axle power is applied by steel plate, threaded rod, bolt, only very little one
Split axle power is applied by the vertical actuator being connected with reaction frame, since the axial force that vertical actuator applies is smaller, accordingly
The frictional force that the hinge shaft or sliding machine being connected with reaction frame produce is also very small.Therefore, the horizontal lotus in capital that new equipment measures
Load is influenced very small by frictional force, and experimenter can be greatly improved with the size of autonomous control axial force in experimentation
The accuracy of experiment measured data.
Claims (4)
1. frictional influence and the loading device that can be controlled to column axial force can be eliminated, it is characterised in that：Including reaction beam (1),
Counter-force column (2), vertical actuator (3), pull pressure sensor I (4), horizontal actuator (5), pull pressure sensor II (6), tension and compression
Force snesor III (7), test specimen (15), hinge shaft (16), positioning seat I (17), positioning seat II (18), attachment device I (19), connection dress
Put II (20) and fixing device (21)；
The test specimen (15) is " ten " font beam-column subassemblage frame, and the beam-column subassemblage frame is divided into up and down four
Branch, four cross sections of the test specimen (15) are rectangle；
The reaction beam (1) and counter-force column (2) are steel structure support, and the both ends of the reaction beam (1) are separately fixed at two
On counter-force column (2)；
The fixing device (21) includes steel plate I (8), steel plate II (9), steel plate III (10), threaded rod I (11), threaded rod II
(12), threaded rod III (13), threaded rod IV (14)；
The pull pressure sensor III (7) and test specimen (15) are fixed with fixing device (21), and specific fixed form is：The tension and compression
One end face of force snesor III (7) connects with steel plate I (8), another end face and the steel plate II of pull pressure sensor III (7)
(9) connect；The upper branch of the test specimen (15) connects with steel plate II (9), and the lower branch of test specimen (15) connects with steel plate III (10)；It is described
Threaded rod I (11), threaded rod II (12), threaded rod III (13), threaded rod IV (14) sequentially pass through steel plate I (8), steel from top to bottom
Plate II (9), steel plate III (10), and tightened on the end face of steel plate I (8) and steel plate III (10) with nut；
The steel plate III (10) is connected with level ground by hinge shaft (16), and the hinge shaft (16) includes three pieces fanning strip and connection
Axis, the shape size of three fanning strips is consistent and is stacked together, and the fanning strip symmetry axis is equipped with through hole, the company
The through hole that spindle sequentially passes through three fanning strips is hinged by three fanning strips, and tightens connection shaft tail end, institute with nut
The fanning strip for stating centre position is fixed on steel plate III (10), and the fanning strip of both sides fixes on the ground；
Described I (4) one end of pull pressure sensor is connected with steel plate I (8) by hinge shaft, the hinge shaft and hinge shaft (16) shape and knot
Structure is consistent, and described I (4) other end of pull pressure sensor is connected with one end of vertical actuator (3)；
The other end of the vertical actuator (3) is connected with attachment device I (19), and the attachment device I (19) is by hinge shaft, screw thread
Bar and steel plate composition, the steel plate is placed on reaction beam (1) position symmetrical above and below, the two panels steel plate by four threaded rods from
Top to bottm sequentially passes through, and two panels steel plate is tightened by nut, and the stud connection is on the steel plate below reaction beam (1), the hinge
Axis is consistent with hinge shaft (16) shape；
One end of the horizontal actuator (5) is connected with attachment device II (20), the attachment device II (20) and attachment device I
(19) composition is consistent with shape, and two pieces of Interal fixations of attachment device II (20) are on counter-force column (2)；
The other end of the horizontal actuator (5) is connected with one end of pull pressure sensor II (6), the pull pressure sensor II
(6) the other end is connected with the upper branch of test specimen (15), and attachment device is consistent with attachment device II (20)；
The positioning seat I (17) and positioning seat II (18) shape are consistent with structure, and position is relative to the lower branch pair of test specimen (15)
Claim；
The positioning seat I (17) and positioning seat II (18) include base, roller ball hinge device, supporting rod and attachment device, described
Roller ball hinge device is located at base top center, and described supporting rod one end is connected with roller ball hinge device, the supporting rod other end
It is connected with attachment device, the attachment device is consistent with attachment device I (19) shape and structure, the connection dress of positioning seat I (17)
Put and be connected in the left branch of test specimen (15), the attachment device of the positioning seat II (18) is connected in the right branch of test specimen (15), institute
State the link position of the attachment device of positioning seat I (17) and positioning seat II (18) relative to test specimen (15) up and down two it is symmetrical.
2. using the loading side for eliminating frictional influence and the loading device that can be controlled to column axial force described in claim 1
Method, it is characterised in that comprise the following steps：
1) longitudinal end of test specimen (15) is fixed between steel plate II (9) and steel plate III (10), transverse ends are separately fixed at fixed
On the supporting rod of position seat I (17) and positioning seat II (18)；
2) bolt on steel plate I (8) and steel plate III (10) is tightened using electronics torque-indicating wrencg, applies experiment in this way
Required column axial force；
3) by horizontal actuator (5), the capital horizontal force needed for experiment is applied to test specimen, and vertical actuator (3) is not applied
Add active force；
4) after the completion of step 3), when column axial force is decreased or increased, pressure or pulling force are applied by vertical actuator (3), it is right
Column axial force is adjusted, until pull pressure sensor III (7) is equal with initial axle power.
3. the loading side according to claim 1 for eliminating frictional influence and the loading device that can be controlled to column axial force
Method, it is characterised in that：The test specimen (15) is for " ten " font intermediate layer intermediate node, " ├ " shape intermediate layer mid-side node and pillar
Test equally applicable.
4. the loading side according to claim 1 for eliminating frictional influence and the loading device that can be controlled to column axial force
Method, it is characterised in that：Four cross sections of the test specimen (15) are equally applicable for circular and T-shaped.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510795909.5A CN105466758B (en) | 2015-11-18 | 2015-11-18 | The loading device and method that frictional influence can be eliminated and column axial force can be controlled |
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| CN201510795909.5A CN105466758B (en) | 2015-11-18 | 2015-11-18 | The loading device and method that frictional influence can be eliminated and column axial force can be controlled |
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| CN105466758B true CN105466758B (en) | 2018-05-08 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865733B (en) * | 2016-04-28 | 2019-02-22 | 福州大学 | A kind of test method and experimental rig for verifying sliding support frictional force |
| CN108241289B (en) * | 2017-11-21 | 2020-10-30 | 华西能源工程有限公司 | Force-displacement hybrid control method for three-degree-of-freedom loading system |
| CN108760520A (en) * | 2018-07-27 | 2018-11-06 | 山东大学 | A kind of steel applying pressure-concrete push out test loading device and method |
| CN109374246A (en) * | 2018-11-02 | 2019-02-22 | 湖南工业大学 | Simulate the experimental rig that crossed beam and column node bears horizontal earthquake action |
| CN110657931A (en) * | 2019-08-22 | 2020-01-07 | 广西大学 | Loading device for vertical member anti-seismic performance test under partial pulling working condition |
| CN113588422B (en) * | 2021-08-06 | 2023-03-21 | 东南大学 | Testing device and testing method for applying horizontal load and vertical load on single column |
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| CN104390845A (en) * | 2014-11-26 | 2015-03-04 | 同济大学 | Portable multifunctional soil mechanical property test device |
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| CN201277925Y (en) * | 2008-10-30 | 2009-07-22 | 河北理工大学 | Concrete stress-strain full curve test apparatus with loading speed controllable |
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