CN105738058B - Beam column space nodes shock test method and shock test beam-ends restraint device - Google Patents
Beam column space nodes shock test method and shock test beam-ends restraint device Download PDFInfo
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- CN105738058B CN105738058B CN201610113749.6A CN201610113749A CN105738058B CN 105738058 B CN105738058 B CN 105738058B CN 201610113749 A CN201610113749 A CN 201610113749A CN 105738058 B CN105738058 B CN 105738058B
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
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- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of beam column space nodes shock test method and shock test beam-ends restraint device, each beam of test method of the present invention is provided with shock test beam-ends restraint device in one end away from post, restraint device of the present invention includes the first ring flat-plate for being arranged in order and being coaxially disposed from outside to inside, second ring flat-plate and the 3rd ring flat-plate, first ring flat-plate and the second ring flat-plate are in axial sliding connection, second ring flat-plate and the connection of the 3rd ring flat-plate circumferential slippage, moving direction and axially vertical the second horizontal displacement mechanism of the 3rd ring flat-plate are provided with the top and bottom of the inner side of 3rd ring flat-plate, rotating shaft is fixed with the outside of first ring flat-plate, rotating shaft is connected with counter-force mechanism.The axis that can be lingered the invention enables beam is rotated, stirred up and down around the shaft, the axially vertical horizontal direction movement with beam and is moved horizontally in the axial direction of beam, and beam is unable to upper and lower translation.There is the free degree in a plurality of directions.
Description
The application is number of patent application：201410082245.3, the applying date：2014-03-07, title：A kind of shock test
With the divisional application of beam-ends restraint device.
Technical field
The present invention relates to a kind of beam column space nodes shock test method, the invention further relates to a kind of shock test beam-ends
Restraint device.
Background technology
During existing beam column plane node experiment, the upper and lower ends of post are generally applied into constraint, it is anti-to apply low week in beam-ends
Load is answered to study its anti-seismic performance.Such a loading mode exerts oneself to be delivered to post from the work of beam.
China is more earthquake countries, and more than 80% city is located at earthquake territory, and earthquake caused by earthquake is increasingly severe.It is right
For engineering structure, to establish Aseismic Design Theory and verify the computational methods of some single components, all be unable to do without specific anti-
Shock stability is tested.Using component inflection point as border from practical structures, choose corresponding bean column node and carry out anti-seismic performance examination
Test be research structure beam column component under geological process strength relationship, and establish prevent styletable from destroying to form structure integral yield
Design effectively method reliable basis.It was found from transitive relation of the geological process in practical structures, geological process is always first
Distributed in intercolumniation and cause the flexural deformation of post, and then be delivered to by beam, post component in the deformation compatibility condition of node on beam.
Further, since ground motion has multi-dimensional nature, randomness and the uncertainty in direction during earthquake, carry out beam column space nodes beam
The actual work of Experimental Study on Seismic Behavior reflection structure more efficiently than plane node under the conditions of end constraint styletable Oblique loading
Make state.But because space nodes are when styletable applies repeated action power, the deformation of member and stress of two orthogonal directions are mutual
Influence, if still result of the test will be influenceed using the constraints of simulation beam-ends inflection point during traditional plane node experiment
Accuracy.Therefore, the Exact Design of beam-ends constraints is to influence the force modes during space nodes are tested and theoretical point
Force modes used whether consistent important ring when analysis and design.
The content of the invention
The technical problem to be solved in the present invention is：There is provided one kind makes beam-ends have multivariant beam column space nodes antidetonation
Test method, the present invention, which also provides one kind, makes beam-ends have multivariant shock test beam-ends restraint device.
In order to solve the above-mentioned technical problem, beam column space nodes shock test method of the present invention, beam column include post and one end
Four beams being fixedly connected with the sustained height position of post, adjacent beam is perpendicular, relative beam point-blank, its feature
It is：The test method comprises the following steps：（1）One shock test beam first is set in one end of the remote post of each beam
Hold restraint device, the first ring flat-plate that shock test includes being arranged in order and be coaxially disposed from outside to inside with beam-ends restraint device, the
Two ring flat-plates and the 3rd ring flat-plate, the first ring flat-plate and the second ring flat-plate are in axial sliding connection, and the second ring flat-plate and the 3rd ring flat-plate circumferential slippage connect
Connect, moving direction and axially vertical the second horizontal displacement of the 3rd ring flat-plate are provided with the top and bottom of the inner side of the 3rd ring flat-plate
Mechanism, rotating shaft is fixed with the outside of the first ring flat-plate, rotating shaft is connected with counter-force mechanism, and counter-force mechanism includes counter-force frame, counter-force machine
Anchor structure is provided with frame, rotating shaft is rotatable around its axis to be arranged in counter-force frame, the axial direction of rotating shaft and the second horizontal displacement
The moving direction of mechanism is identical；Beam is clipped between two the second horizontal displacement mechanisms, by counter-force mechanism be anchored at ground or its
In its fixing device；（2）Oblique horizontal force is loaded to post upper end；（3）The deflection of measurement column and beam；（4）When the inclination angle of post
Degree stops loading when reaching setting value.
In order that axial slip is sensitiveer between the first ring flat-plate and the second ring flat-plate, and first level displacement mechanism, described
Multiple first level displacement mechanisms along the circumferential direction arranged, first level displacement mechanism are provided between one ring flat-plate and the second ring flat-plate
Including guide rail, pulley and pulley yoke, guide rail is fixed on the inner side of the first ring flat-plate, and pulley yoke is fixed on the outside of the second ring flat-plate, pulley
It is rotatably arranged on pulley yoke, pulley is slidably arranged on guide rail, and the guide direction of guide rail is on the axial direction of the first ring flat-plate.
In order that the second ring flat-plate slided on the circumference of the 3rd ring flat-plate the second sensitiveer, described ring flat-plate and the 3rd ring flat-plate it
Between be provided with multi-turn ball grooves, often enclose ball grooves in be provided with multiple balls.
In order that the rotation of the first ring flat-plate around the shaft is more stable, the both sides of the outside of the first described ring flat-plate are respectively provided with one
Rotating shaft, on an axis, each rotating shaft is respectively connected with the counter-force mechanism described in one for two rotating shafts.
In order that rotating shaft rotates in counter-force frame is provided with multi-turn rolling between more flexible, described rotating shaft and counter-force frame
Pearl groove, often enclose in ball grooves and be provided with multiple balls.
For the ease of making, the first described ring flat-plate includes multiple arcs circumferentially arranged, and the two of each arc
Side is respectively and fixedly provided with connecting plate, and the connecting plate of adjacent arc is bolted to connection.
For the ease of installing the second horizontal displacement mechanism, the second described horizontal displacement mechanism is set by wing plate and floor
On the 3rd ring flat-plate, wing plate is fixed on the medial surface of the 3rd ring flat-plate, and floor is fixed on wing plate, and floor is faced in the 3rd ring flat-plate
The one side of the heart is horizontal, and the second horizontal displacement mechanism is arranged on floor on the face at the 3rd ring flat-plate center.
For the ease of make the second horizontal displacement mechanism, the second described horizontal displacement mechanism include supporting plate, ball and
Ball box, ball are in ball box, and the outside of ball contacts with supporting plate.
In order that the stability of the motion of the second horizontal displacement mechanism is good, the second described horizontal displacement mechanism includes leading
Rail, pulley and pulley yoke, pulley rotation are arranged on pulley yoke, and pulley is slidably arranged on guide rail, and the guide direction of guide rail exists
In the horizontal direction vertical with the axial direction of the 3rd ring flat-plate.
Shock test of the present invention with beam-ends restraint device include be arranged in order and be coaxially disposed from outside to inside the first ring flat-plate,
Second ring flat-plate and the 3rd ring flat-plate, the first ring flat-plate and the second ring flat-plate are in axial sliding connection, the second ring flat-plate and the 3rd ring flat-plate circumferential slippage
Connection, moving direction and axially vertical the second horizontal position of the 3rd ring flat-plate are provided with the top and bottom of the inner side of the 3rd ring flat-plate
Telephone-moving structure, rotating shaft is fixed with the outside of the first ring flat-plate, rotating shaft is connected with counter-force mechanism, and counter-force mechanism includes counter-force frame, counter-force
Anchor structure is provided with frame, rotating shaft is rotatable around its axis to be arranged in counter-force frame, the axial direction of rotating shaft and the second horizontal position
The moving direction of telephone-moving structure is identical；The first described ring flat-plate includes multiple arcs circumferentially arranged, and the two of each arc
Side is respectively and fixedly provided with connecting plate, and the connecting plate of adjacent arc is bolted to connection.
The beneficial effects of the invention are as follows：Shock test of the present invention with beam-ends restraint device using when be enclosed on one of beam away from post
On end, then counter-force mechanism is anchored on ground or other fixing devices so that the axis that beam can linger rotates, around the shaft
Stir up and down, the axially vertical horizontal direction with beam is mobile and is moved horizontally in the axial direction of beam, beam is unable to upper and lower translation.More
There is the free degree on individual direction.Eliminate the phase between the deformation of two orthogonal direction beams and stress during styletable Oblique loading is tested
Mutually influence, for anti-seismic performance of the research structure under more closing to reality condition of work and improve structural aseismatic design tool
It is significant.
Brief description of the drawings
Fig. 1 is the main structure diagram of the present invention；
Fig. 2 is the dimensional structure diagram of the present invention（Remove counter-force mechanism part）；
Fig. 3 is the structural representation enlarged drawing of part 2；
Fig. 4 is the A partial enlarged drawings in Fig. 1；
Fig. 5 antidetonations examination shake schematic diagram；
In figure：1st, the first ring flat-plate, 2, first level displacement mechanism, the 3, second ring flat-plate, 4, ball, 5, connecting plate, 6, wing plate,
7th, floor, the 8, second horizontal displacement mechanism, the 9, the 3rd ring flat-plate, 10, pin, 11, rotating shaft, 12, counter-force frame, 13, bolthole,
14th, beam, 15, shock test beam-ends restraint device, 16, post.2-1, guide rail, 2-2, pulley, 2-3, pulley yoke, 8-1, support
Plate, 8-2, ball, 8-3, ball box.
Embodiment
Specific embodiment one
A kind of specific embodiment as shown in Figure 1, Figure 2, Figure 3 and Figure 4, it includes being arranged in order and coaxially setting from outside to inside
The first ring flat-plate 1, the second ring flat-plate 3 and the 3rd ring flat-plate 9 put, the first ring flat-plate 1 and the second ring flat-plate 3 are in axial sliding connection, the second ring flat-plate 3
Connected with the circumferential slippage of the 3rd ring flat-plate 9, the inner side of the 3rd ring flat-plate 9 be provided with moving direction and the 3rd ring flat-plate 9 it is axially vertical
Two horizontal displacement mechanisms 8, the outside of the first ring flat-plate 1 are fixed with rotating shaft 11, and rotating shaft 11 is connected with counter-force mechanism, and counter-force mechanism includes
Counter-force frame 12, anchor structure is provided with counter-force frame 12, anchor structure can be bolthole 13, by anchor pole by counter-force machine
Frame 12 is fixed together with ground or other fixing devices.Can also be directly anchored to counter-force frame upper connecting rod or connection
Frame, it is fixed in by bolt on ground or other fixing devices.Rotating shaft 11 is rotatable around its axis to be arranged on counter-force frame 12
On, rotating shaft 11 is axially identical with the moving direction of the second horizontal displacement mechanism 8.
Multiple first level displacement mechanisms 2 along the circumferential direction arranged are provided between first ring flat-plate 1 and the second ring flat-plate 3, such as
Shown in Fig. 3, first level displacement mechanism 2 includes guide rail 2-1, pulley 2-2 and pulley yoke 2-3, and guide rail 2-1 is fixed on the first ring flat-plate
1 inner side, pulley yoke 2-3 are fixed on the outside of the second ring flat-plate 3, and pulley 2-2 is rotatably arranged on pulley yoke 2-3, and pulley 2-2 is slided
It is arranged on guide rail 2-1, guide rail 2-1 guide direction is on the axial direction of the first ring flat-plate 1.
Multi-turn ball grooves are provided between second ring flat-plate 3 and the 3rd ring flat-plate 9, often encloses in ball grooves and is provided with multiple balls 4.
The both sides of the outside of first ring flat-plate 1 are respectively provided with a rotating shaft 11, two rotating shafts 11 on an axis, each rotating shaft
11 are respectively connected with the counter-force mechanism described in one.Can certainly there was only a rotating shaft 11, the less stable only rotated.Rotating shaft
Directly it is plugged in counter-force frame 12, the other end is spacing by pin 10.
First ring flat-plate 1 includes multiple arcs circumferentially arranged, and the both sides of each arc are respectively and fixedly provided with connecting plate 5,
The connecting plate 5 of adjacent arc is bolted to connection.
The second described horizontal displacement mechanism 8 is equipped with the top and bottom of the inner side of 3rd ring flat-plate 9.Second horizontal displacement
Mechanism 8 is arranged on the 3rd ring flat-plate 9 by wing plate 6 and floor 7, and wing plate 6 is fixed on the medial surface of the 3rd ring flat-plate 9, and floor 7 is logical
Cross and be bolted on wing plate 6, one side of the floor 7 in face of the center of the 3rd ring flat-plate 9 is horizontal, and the second horizontal displacement mechanism 8 is arranged on
Floor 7 is on the face at the 3rd ring flat-plate center.As shown in figure 4, the second horizontal displacement mechanism 8 includes supporting plate 8-1, ball 8-2
It is in ball box 8-3, ball 8-2 in ball box 8-3, ball 8-2 outside contacts with supporting plate 8-1.
In use, the present apparatus is arranged on the end of beam 14, the upper and lower surfaces of beam 14 are both supported upon the second water of the present apparatus
On flat displacement mechanism 8.The ball box 8-3 of second horizontal displacement mechanism 8 of top is attached on beam 14, and supporting plate 8-1 is fixed on rib
On plate 7.The ball box 8-3 of second horizontal displacement mechanism 8 of lower section is fixed on floor 7, and supporting plate 8-1 is attached on beam 14.
Specific embodiment two
The difference of this specific embodiment and specific embodiment one is in the second horizontal displacement mechanism structure and first level displacement
Mechanism is identical, including guide rail, pulley and pulley yoke, pulley rotation are arranged on pulley yoke, and pulley is slidably arranged on guide rail, is led
The guide direction of rail is in the horizontal direction vertical with the axial direction of the 3rd ring flat-plate 9.One is fixed in guide rail and pulley yoke
On floor 7, another is supported on beam 14.
Specific embodiment three
This specific embodiment is that wing plate 6 and floor 7 can not have with the difference of specific embodiment one, the second horizontal position telephone-moving
Structure is set directly on the 3rd ring flat-plate 9.And the ball between the second ring flat-plate 3 and the 3rd ring flat-plate 9 can not have.
Specific embodiment four
The difference of this specific embodiment and specific embodiment one is to be provided with multi-turn between rotating shaft 11 and counter-force frame 12
Ball grooves, often enclose in ball grooves and be provided with multiple balls, or bearing is set between rotating shaft 11 and counter-force frame 12.
Using the beam column space nodes shock test of restraint device of the present invention, as shown in figure 5, beam column includes post 16 and one end
Four beams 14 being fixedly connected with the sustained height position of post 16, adjacent beam 14 is perpendicular, and relative beam 14 is in straight line
On, test method,（1）First a shock test of the present invention is set about to be got one's things ready with beam-ends in one end of the remote post 16 of each beam 14
Put 15（All restraint devices described in the present invention are applicable）, beam is clipped between two the second horizontal displacement mechanisms 8, will
Counter-force mechanism is anchored in ground or other fixing devices,（2）Oblique horizontal force is loaded to the upper end of post 16；（3）Measurement column and beam
Deflection；（4）Stop loading when the angle of inclination of post 16 reaches setting value.
Beam can be driven to deform when post stress deforms, the axis that can be lingered due to beam rotated, around the shaft on
Under stir, the axially vertical horizontal direction with beam is mobile and is moved horizontally in the axial direction of beam, simply beam is unable to upper and lower translation.Disappear
Influencing each other between the deformation of two orthogonal direction beams and stress during being tested except styletable Oblique loading.
Claims (10)
1. a kind of beam column space nodes shock test method, beam column includes post and one end is fixedly connected with the sustained height position of post
Four beams, adjacent beam is perpendicular, and relative beam is point-blank, it is characterised in that：The test method includes as follows
Step：（1）One shock test beam-ends restraint device, shock test beam-ends first are set in one end of the remote post of each beam
Restraint device includes the first ring flat-plate, the second ring flat-plate and the 3rd ring flat-plate for being arranged in order and being coaxially disposed from outside to inside, the first ring flat-plate
Be in axial sliding connection with the second ring flat-plate, the second ring flat-plate and the 3rd ring flat-plate circumferential slippage connection, the top of the inner side of the 3rd ring flat-plate and
Bottom is provided with moving direction and axially vertical the second horizontal displacement mechanism of the 3rd ring flat-plate, is fixed with the outside of the first ring flat-plate
Rotating shaft, rotating shaft are connected with counter-force mechanism, and counter-force mechanism includes counter-force frame, are provided with anchor structure in counter-force frame, rotating shaft around
Its axis is rotatably arranged in counter-force frame, and the axial direction of rotating shaft is identical with the moving direction of the second horizontal displacement mechanism；Press from both sides beam
Between two the second horizontal displacement mechanisms, counter-force mechanism is anchored on ground or other fixing devices；（2）Post upper end is added
Carry oblique horizontal force；（3）The deflection of measurement column and beam；（4）Stop loading when the angle of inclination of post reaches setting value.
2. beam column space nodes shock test method according to claim 1, it is characterised in that：Described the first ring flat-plate and
Multiple first level displacement mechanisms along the circumferential direction arranged are provided between second ring flat-plate, first level displacement mechanism includes leading
Rail, pulley and pulley yoke, guide rail are fixed on the inner side of the first ring flat-plate, and pulley yoke is fixed on the outside of the second ring flat-plate, and pulley rotation is set
Put on pulley yoke, pulley is slidably arranged on guide rail, and the guide direction of guide rail is on the axial direction of the first ring flat-plate.
3. beam column space nodes shock test method according to claim 2, it is characterised in that：Described the second ring flat-plate and
Multi-turn ball grooves are provided between 3rd ring flat-plate, often encloses in ball grooves and is provided with multiple balls.
4. beam column space nodes shock test method according to claim 3, it is characterised in that：The first described ring flat-plate
Outside both sides are respectively provided with a rotating shaft, and on an axis, each rotating shaft is respectively connected with the counter-force described in one for two rotating shafts
Mechanism.
5. beam column space nodes shock test method according to claim 4, it is characterised in that：Described rotating shaft and counter-force
Multi-turn ball grooves are provided between frame, often encloses in ball grooves and is provided with multiple balls.
6. beam column space nodes shock test method according to claim 5, it is characterised in that：The first described ring flat-plate bag
Multiple arcs circumferentially arranged are included, the both sides of each arc are respectively and fixedly provided with connecting plate, and the connecting plate of adjacent arc leads to
Bolt is crossed to be fixedly connected.
7. according to beam column space nodes shock test method any one of claim 1-6, it is characterised in that：Described
Second horizontal displacement mechanism is arranged on the 3rd ring flat-plate by wing plate and floor, and wing plate is fixed on the medial surface of the 3rd ring flat-plate,
Floor is fixed on wing plate, and one side of the floor in face of the 3rd ring flat-plate center is horizontal, and the second horizontal displacement mechanism is arranged on floor face
To on the face at the 3rd ring flat-plate center.
8. beam column space nodes shock test method according to claim 7, it is characterised in that：The second described horizontal position
Telephone-moving structure includes supporting plate, ball and ball box, and ball is in ball box, and the outside of ball contacts with supporting plate.
9. beam column space nodes shock test method according to claim 7, it is characterised in that：The second described horizontal position
Telephone-moving structure includes guide rail, pulley and pulley yoke, and pulley rotation is arranged on pulley yoke, and pulley is slidably arranged on guide rail, guide rail
Guide direction in the horizontal direction vertical with the axial direction of the 3rd ring flat-plate.
A kind of 10. shock test beam-ends restraint device, it is characterised in that：Including what is be arranged in order and be coaxially disposed from outside to inside
First ring flat-plate, the second ring flat-plate and the 3rd ring flat-plate, the first ring flat-plate and the second ring flat-plate are in axial sliding connection, the second ring flat-plate and the 3rd ring flat-plate
Circumferential slippage connects, be provided with the top and bottom of the inner side of the 3rd ring flat-plate moving direction and the 3rd ring flat-plate it is axially vertical the
Two horizontal displacement mechanisms, rotating shaft are fixed with the outside of the first ring flat-plate, rotating shaft is connected with counter-force mechanism, and counter-force mechanism includes counter-force machine
Frame, anchor structure is provided with counter-force frame, rotating shaft is rotatable around its axis to be arranged in counter-force frame, the axial direction of rotating shaft and second
The moving direction of horizontal displacement mechanism is identical；The first described ring flat-plate includes multiple arcs circumferentially arranged, each arc
The both sides of plate are respectively and fixedly provided with connecting plate, and the connecting plate of adjacent arc is bolted to connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610113749.6A CN105738058B (en) | 2014-03-07 | 2014-03-07 | Beam column space nodes shock test method and shock test beam-ends restraint device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410082245.3A CN103940562B (en) | 2014-03-07 | 2014-03-07 | A kind of shock test beam-ends restraint device |
| CN201610113749.6A CN105738058B (en) | 2014-03-07 | 2014-03-07 | Beam column space nodes shock test method and shock test beam-ends restraint device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410082245.3A Division CN103940562B (en) | 2014-03-07 | 2014-03-07 | A kind of shock test beam-ends restraint device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105738058A CN105738058A (en) | 2016-07-06 |
| CN105738058B true CN105738058B (en) | 2017-11-21 |
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| CN201610113749.6A Expired - Fee Related CN105738058B (en) | 2014-03-07 | 2014-03-07 | Beam column space nodes shock test method and shock test beam-ends restraint device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110887629A (en) * | 2019-12-27 | 2020-03-17 | 徐磊 | Column cap connecting and fixing device for historic building wood node anti-seismic test |
| CN112945728A (en) * | 2021-01-29 | 2021-06-11 | 北京工业大学 | Plane node test loading device with adjustable loading angle |
| CN112903458A (en) * | 2021-01-29 | 2021-06-04 | 北京工业大学 | Space node test loading device with adjustable loading angle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100502430B1 (en) * | 2003-08-29 | 2005-07-21 | 주식회사 네스지오 | Vibration Direction Conversion Device and Vibration Testing Apparatus Equipped with It |
| CN201844931U (en) * | 2010-10-28 | 2011-05-25 | 宁波大学 | Experimental apparatus for beam end orientation constraint |
| JP5813346B2 (en) * | 2011-03-24 | 2015-11-17 | カヤバ工業株式会社 | Excitation apparatus and excitation method |
| CN103132708B (en) * | 2013-03-01 | 2015-05-06 | 东南大学 | Beam-column joint reinforcing method and beam-column joint reinforcing device |
| CN103196687A (en) * | 2013-03-21 | 2013-07-10 | 广西大学 | Loading device applicable to space specially-shaped column node test |
| CN203216811U (en) * | 2013-03-21 | 2013-09-25 | 河海大学 | Constant-axial force self-balancing loading device for nodes on different column sections |
| CN103175707A (en) * | 2013-03-25 | 2013-06-26 | 同济大学 | Testing apparatus suitable for substructure robustness of beam-column joints of planar frames |
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