CN106680090B - Testing device and testing method for stable bearing capacity of angle steel crossed diagonal material - Google Patents
Testing device and testing method for stable bearing capacity of angle steel crossed diagonal material Download PDFInfo
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- CN106680090B CN106680090B CN201710037619.3A CN201710037619A CN106680090B CN 106680090 B CN106680090 B CN 106680090B CN 201710037619 A CN201710037619 A CN 201710037619A CN 106680090 B CN106680090 B CN 106680090B
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N2203/0032—Generation of the force using mechanical means
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Abstract
A stable bearing capacity test device and a test method for angle steel crossed oblique materials are disclosed, the device comprises a reaction wall (1) and a reaction frame, the reaction frame and the reaction wall (1) are fixed on a horizontal ground (22), the reaction frame comprises an upright post (7) and a cross beam (15) fixed on the upright post (7), a servo actuator (3) is fixed on the side surface of the reaction wall (1) opposite to the reaction frame, the servo actuator (3) is horizontally arranged, the device also comprises a jack (11), the jack (11) is vertically arranged on the horizontal ground (22), and the cross beam (15), the upright post (7), the reaction wall (1) and the jack (11) are all provided with oblique material fixing devices which can fix four ends of the oblique materials; this bearing capacity test device is stabilized to oblique material of angle steel intersection passes through servo actuator (3) and jack (11) and carries out the application of force test to oblique material of angle steel intersection, can the bearing capacity numerical value of the oblique material of spot test, and the suitability is strong, and it is convenient to detect, and numerical value is accurate.
Description
Technical Field
The invention relates to a bearing capacity test device, in particular to a device and a method for testing the stable bearing capacity of diagonal steel crossed inclined bars.
Background
The steel tower is used for supporting and bearing a space truss structure of a transmission line, generally comprises three parts, namely a tower head, a tower body and tower legs, and is generally manufactured by adopting angle steel, steel plates or steel pipe parts and formed by combining and connecting by bolts and welding.
The angle steel cross diagonal member is a common component of a power transmission tower and is also an important component for improving the bearing capacity and the anti-deformation performance of the power transmission tower, the stability calculation of the cross diagonal member is complex due to factors such as eccentricity of a rod end, rotation constraint and the like, however, the existing technical regulation on the design of an overhead power transmission line tower structure (DL/T5154-2012) simplifies the calculation into the calculation of an axis compression member, the data discreteness is large, the existing theory is still established on the basis of finite element simulation and theoretical analysis, corresponding test basis is lacked, and at present, no special test device for carrying out the bearing capacity of the cross diagonal member exists in China.
Therefore, the invention is urgently needed to provide a stable bearing capacity test device for the angle iron cross diagonal material of the power transmission line iron tower, which has the advantages of simple structure, convenience in installation and strong universality.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device and a method for testing the stable bearing capacity of an angle steel crossed inclined material, which have the advantages of simple structure, convenience in installation and strong universality.
In order to achieve the aim, the angle steel crossed oblique material stable bearing capacity test device comprises a reaction wall, a reaction frame and an electric control device, wherein the reaction frame and the reaction wall are fixed on the horizontal ground;
the reaction frame comprises an upright post and a cross beam horizontally fixed on the upright post, and the cross beam is fixedly connected with the upright post through a mobile positioning mechanism;
a horizontally arranged servo actuator is fixedly arranged on the wall surface of the reaction wall surface opposite to the reaction frame through an actuator base, a load sensor is arranged in the servo actuator, one end, far away from the reaction wall, of the servo actuator is fixedly connected with one end of a first T-shaped support, and an inclined material fastening part is arranged at the other end of the first T-shaped support;
a fourth T-shaped support is fixedly arranged on the cylindrical surface of the upright column facing the counter-force wall, the fourth T-shaped support is fixedly connected with the upright column through a movable positioning mechanism, and an inclined material fastening part is arranged at one end, far away from the upright column, of the fourth T-shaped support;
a third T-shaped support is fixedly arranged on the bottom surface of the cross beam and fixedly connected with the cross beam through a movable positioning mechanism, and an inclined material fastening part is arranged at one end, far away from the cross beam, of the third T-shaped support;
a jack is vertically arranged on the horizontal ground corresponding to the third T-shaped support, a second T-shaped support is fixedly arranged at the top end of the jack, a load sensor is arranged between the top end of the jack and the second T-shaped support, and an inclined material fastening part is arranged at one end, far away from the jack, of the second T-shaped support; the jack is externally provided with a sleeve with an opening at the top end, the outer surface of the jack is provided with two longitudinal sliding chutes, the longitudinal sliding chutes are positioned at two symmetrical sides of the sleeve and do not penetrate through the side wall of the sleeve, the two longitudinal sliding chutes are respectively connected with an L-shaped steel plate in a sliding manner, and the top end of the L-shaped steel plate is fixedly connected with the second T-shaped support;
the cross sections of the upright post and the cross beam are H-shaped, one surface of the upright post, which is opposite to the reaction wall, is uniformly provided with a plurality of mounting holes from top to bottom, and the bottom surface of the cross beam is provided with uniformly distributed mounting holes in the length direction;
the electric control device comprises an industrial control computer, a load control loop, a load feedback loop and a data analysis output loop, wherein the industrial control computer is respectively and electrically connected with a built-in sensor of the servo actuator and a load sensor connected with the jack.
The positions of the T-shaped supports and the longitudinal position of the cross beam can be adjusted to adapt to various angles of intersection, various sizes and specifications of inclined materials by changing the direction of a loading force of the servo actuator. The pressure and tensile stress can be applied to the inclined material through the servo actuator, and the load value of the inclined material is automatically acquired by the built-in sensor. Can exert compressive stress to the timber to one side through the jack, its load value is acquireed by external load sensor is automatic, so can be very convenient detect and aassessment the pressure-bearing stability of timber to one side.
As a further improvement of the invention, the upright post and the reaction wall are fixedly connected through a horizontal pull rod, a first bolt fixing member and a second bolt fixing member.
As a further improvement of the invention, a bracket is fixed on the outer surface of the servo actuator, and a support rod of the bracket is fixedly connected with the reaction wall.
As a further improvement scheme of the invention, the upright columns further comprise two auxiliary upright columns, the auxiliary upright columns, contact points of the upright columns and the horizontal ground form an isosceles triangle, the bottom of the isosceles triangle is parallel to the side face of the reaction wall opposite to the upright columns, the top ends of the two auxiliary upright columns on the bottom side of the isosceles triangle are connected through a top end beam, and the top ends of the upright columns on the top points of the isosceles triangle are connected with the top end beam through beams.
As a further improvement scheme of the invention, a ground fixing steel beam is fixed at the bottom end of the upright post, and an inclined oblique supporting steel beam is fixed between the ground fixing steel beam and the upright post.
The stable bearing capacity test method for the angle steel crossed inclined material comprises the following steps: fixedly connecting each end of the angle steel cross inclined material with a first T-shaped support, a second T-shaped support and a third T-shaped support respectively;
step two: controlling a servo actuator and a jack to apply pressure to the angle steel cross inclined material, and obtaining a load numerical value when two ends of the angle steel cross inclined material bear the pressure through a sensor arranged in the servo actuator and a load sensor connected with the jack;
step three: when the load value of one of the built-in sensor in the servo actuator or the load sensor connected with the jack in the step two cannot be kept stable and is in a descending trend, the test in the step two is stopped, and the first descending load value is the maximum pressure which can be borne by the angle steel cross inclined material;
step four: controlling a servo actuator to apply tension to horizontal angle steel in the angle steel cross inclined material, controlling a jack to apply pressure to vertical angle steel in the angle steel cross inclined material, and obtaining a load numerical value when one end of the angle steel cross inclined material bears the pressure and the other end bears the tension through a sensor arranged in the servo actuator and a load sensor connected with the jack;
step five: and when the load numerical value of the load sensor connected with the jack in the fourth step can not be kept stable and is in a descending trend, the test is terminated, the corresponding load numerical value is recorded, and the descending load numerical value is the maximum pressure which can be borne by the angle steel crossed inclined material.
Through the steps, the load condition of the diagonal steel crossed diagonal material can be tested and analyzed quickly and accurately, and further the performance of the diagonal steel crossed diagonal material can be evaluated accurately; the invention can carry out the stable bearing force test of pressing-pressing and pulling-pressing on the angle steel cross diagonal material by changing the direction of the loading force of the servo actuator, the servo actuator fixed on the counterforce wall can apply pressure and pulling force, the load value is automatically obtained by a built-in sensor, a horizontal jack placed on the ground mainly provides pushing force to make the angle steel cross diagonal material generate pressure, and the corresponding load value is obtained by a pressure sensor; the horizontal rigidity of the device can be further ensured by arranging the horizontal pull rod, so that the test precision can be ensured; the cross sections of the upright post and the cross beam are both arranged in an H shape, the surface, opposite to the reaction wall, of the upright post is uniformly provided with a plurality of mounting holes from top to bottom, and the bottom surface of the cross beam is provided with the uniformly distributed mounting holes in the length direction, so that the flexibility of the device can be improved, and the device can be used for testing angle steel cross inclined materials of different types; the universality of the device can be improved by adjusting the upper steel beam in the horizontal and vertical directions; the servo actuator is fixed through the bracket, so that the fixing effect of the end part is better ensured, and the accuracy of the test can be ensured; the accuracy of the test can be further ensured by the connection of the L-shaped steel plate with the sliding groove on the jack sleeve and the fixed connection with the T-shaped support; the device has simple operation process, wide applicability, high reliability and reusability.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the device with a fixing structure such as an auxiliary column.
FIG. 3 isbase:Sub>A cross-sectional view A-A of FIG. 2;
FIG. 4 is a schematic view of the position of the auxiliary uprights and top cross-member;
FIG. 5 is a schematic view of a jack and sleeve;
FIG. 6 is a schematic view of a sleeve;
FIG. 7 is a front view of a second T-shaped support;
FIG. 8 is a left side view of a second T-shaped support;
FIG. 9 is a top view of a second T-shaped support;
fig. 10 is a front view of the stand.
In the figure, 1, a reaction wall, 2, an actuator base, 3, a servo actuator, 4, a bracket, 5, a first T-shaped support, 6, a horizontal pull rod, 7, an upright column, 71, an auxiliary upright column, 8, an angle steel cross inclined material, 9, a sleeve, 91, a longitudinal sliding groove, 10, an L-shaped steel plate, 11, a jack, 12, a load sensor, 13, a second T-shaped support, 14, a third T-shaped support, 15, a cross beam, 16, a first bolting component, 17, a fourth T-shaped support, 18, a ground fixing steel beam, 19, an inclined supporting steel beam, 20, a top fixing steel beam, 21 and a second bolting component.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
As shown in figure 1, the angle steel crossed inclined material stable bearing capacity test device comprises a reaction wall 1, a reaction frame and an electric control device, wherein the reaction frame and the reaction wall 1 are fixed on a horizontal ground.
The reaction frame comprises a vertical column 7 and a cross beam 15 horizontally fixed on the vertical column 7.
Reaction wall 1 is equipped with the servo actuator 3 that the level set up through actuator base 2 is fixed on the wall to the reaction frame, and servo actuator 3 embeds there is load sensor, and servo actuator 3 keeps away from the one end of reaction wall 1 and the one end fixed connection of first T type support 5, and the other end of first T type support 5 is equipped with oblique material fastening component.
And a fourth T-shaped support 17 is fixedly arranged on the cylindrical surface of the upright post 7 facing the reaction wall 1, and one end, far away from the upright post 7, of the fourth T-shaped support 17 is provided with an oblique material fastening part.
And a third T-shaped support 14 is fixedly arranged on the bottom surface of the cross beam 15, and one end, far away from the cross beam 15, of the third T-shaped support 14 is provided with an oblique material fastening part.
A jack 11 is vertically arranged at a position corresponding to the third T-shaped support 14 on the horizontal ground, a second T-shaped support 13 is fixedly arranged at the top end of the jack 11, a load sensor 12 is arranged between the top end of the jack 11 and the second T-shaped support 13, and an oblique material fastening part is arranged at one end, far away from the jack 11, of the second T-shaped support 13.
The electric control device comprises an industrial control computer, a load control loop, a load feedback loop and a data analysis output loop, wherein the industrial control computer is respectively and electrically connected with a built-in load sensor and a load sensor 12 of the servo actuator 3.
In order to facilitate the test of the cross diagonal members with different cross angles, as a further improvement scheme of the invention, the cross beam 15 can be fixedly connected with the upright post 7 through bolts, a plurality of mounting holes are required to be arranged on the upright post 7 for adjusting the height position of the cross beam 15, the cross beam 15 can also be connected with the upright post 7 through a chute, and the longitudinal position of the cross beam is fixed through a fastener; likewise, the position can be adjusted using this method for the adjustment of the third and fourth T-shaped mounts.
And the fastening parts at the head ends of all the T-shaped supports can be fastening parts with any common structure, and can also be hinged holes, and the hinged holes are hinged with the end parts of the inclined materials.
In order to ensure the accuracy of the test, as a further improvement of the present invention, as shown in fig. 2 to 9, the upright post 7 is fixedly connected with the reaction wall 1 through a horizontal pull rod 6, a first bolting component 16 and a second bolting component 21; through the arrangement of the horizontal pull rod 6, the horizontal rigidity of the device can be further ensured, so that the test precision can be ensured.
In order to increase the stability of the second T-shaped support 13 and ensure the accuracy of the test in the process of the telescopic test of the jack 11, as a further improvement scheme of the invention, the jack 11 is externally provided with a sleeve 9 with an open top end, the outer surface of the jack is provided with two longitudinal sliding chutes 91, the longitudinal sliding chutes 91 are positioned at two symmetrical sides of the sleeve 9, the longitudinal sliding chutes 91 do not penetrate through the side wall of the sleeve 9, the two longitudinal sliding chutes 91 are respectively connected with the L-shaped steel plate 10 in a sliding manner, and the top end of the L-shaped steel plate 10 is fixedly connected with the second T-shaped support 13; second T type support 13 accessible L shaped steel plate 10 stabilizes and slides from top to bottom on sleeve 9 in the jack 11 action process, simultaneously through the L shaped steel plate with jack sleeve go up the spout be connected and with second T type support's fixed connection, can make the compressive stress that jack 11 produced can be followed the spout and upwards perpendicularly, the experimental accuracy nature of further assurance.
In order to ensure the stability of the output load of the servo actuator 3, as a further improvement of the invention, a bracket 4 is fixed on the outer surface of the servo actuator 3, and a support rod of the bracket 4 is fixedly connected with the reaction wall 1; the servo actuator 3 is fixed on the reaction wall 1 through the bracket 4, so that the stress generating direction of the servo actuator 3 can be ensured to be stable, and the problems of vibration, displacement and the like caused by the increase of the stress can be avoided.
In order to facilitate installation and be suitable for tests of angle steel cross inclined materials of different types, as a further improvement scheme of the invention, the cross sections of the upright post 7 and the cross beam 15 are both H-shaped, the surface of the upright post 7 opposite to the reaction wall 1 is uniformly provided with a plurality of installation holes from top to bottom, and the bottom surface of the cross beam 15 is provided with the installation holes which are uniformly distributed in the length direction.
In order to increase the overall stability of the reaction frame, as a further improvement scheme of the invention, the upright 7 further comprises two auxiliary uprights 71, the contact points of the auxiliary uprights 71 with the upright 7 and the horizontal ground form an isosceles triangle, the bottom of the isosceles triangle is parallel to the side face of the reaction wall 1 opposite to the upright 7, the top ends of the two auxiliary uprights 71 on the bottom side of the isosceles triangle are connected through a top end cross beam 20, and the top end of the upright 7 on the top point of the isosceles triangle is connected with the top end cross beam 20 through a cross beam 15; the three stand columns are distributed in a triangular mode, so that the stability of the reaction frame can be improved, and the test precision is guaranteed.
In order to further increase the overall stability of the reaction frame, as a further improvement of the present invention, a ground fixing steel beam 18 is fixed to the bottom end of the upright post 7, and an inclined oblique supporting steel beam 19 is fixed between the ground fixing steel beam 18 and the upright post 7.
In the test process, the direction of a loading force of the servo actuator 3 is changed, so that the stable bearing force test of pressing-pressing and pulling-pressing of the angle steel cross diagonal member 8 can be performed, the servo actuator 3 fixed on the reaction wall 1 can apply pressure and pulling force, the load value of the servo actuator is automatically obtained by a built-in sensor, a horizontal jack 11 in a jack sleeve 9 placed on the ground mainly provides pushing force to enable the angle steel cross diagonal member to generate pressure, and the corresponding load value is obtained by a pressure sensor; the device has simple operation process, wide applicability, high reliability and reusability.
When the device is used for testing, the first step is as follows: fixedly connecting each end of the angle steel cross diagonal member 8 with the first to fourth T-shaped supports 5, 13, 14 and 17 respectively;
step two: controlling a servo actuator 3 and a jack 11 to apply pressure to the angle steel cross inclined material 8, and obtaining a load numerical value when two ends of the angle steel cross inclined material 8 bear the pressure through a sensor arranged in the servo actuator 3 and a load sensor 12 connected with the jack 11;
step three: when the load value of one of the built-in sensor in the servo actuator 3 or the load sensor 12 connected with the jack 11 in the step two cannot be kept stable and is in a descending trend, the test in the step two is stopped, and the first descending load value is the maximum pressure which can be borne by the angle steel cross inclined material 8;
step four: controlling a servo actuator 3 to apply tension to a horizontal angle steel in an angle steel cross diagonal material 8, controlling a jack 11 to apply pressure to a vertical angle steel in the angle steel cross diagonal material 8, and obtaining a load numerical value when one end of the angle steel cross diagonal material 8 bears the pressure and the other end bears the tension through a sensor built in the servo actuator 3 and a load sensor 12 connected with the jack 11;
step five: and when the load value of the load sensor 12 connected with the jack 11 in the fourth step can not be kept stable and is in a descending trend, the test is terminated, the corresponding load value is recorded, and the first descending load value is the maximum pressure which can be borne by the angle steel crossed inclined material 8.
So can obtain the numerical value of angle steel oblique material bearing capacity alternately fast, the stability of rapid analysis structure, convenient to use, the practicality is strong.
Claims (6)
1. A stable bearing capacity test device for angle steel crossed oblique materials comprises a reaction wall (1), a reaction frame and an electric control device, wherein the reaction frame and the reaction wall (1) are fixed on a horizontal ground; it is characterized in that the preparation method is characterized in that,
the reaction frame comprises an upright post (7) and a cross beam (15) horizontally fixed on the upright post (7), and the cross beam (15) is fixedly connected with the upright post (7) through a mobile positioning mechanism;
a horizontally arranged servo actuator (3) is fixedly arranged on the wall surface of the reaction wall (1) facing the reaction frame through an actuator base (2), a load sensor is arranged in the servo actuator (3), one end, far away from the reaction wall (1), of the servo actuator (3) is fixedly connected with one end of a first T-shaped support (5), and the other end of the first T-shaped support (5) is provided with an inclined material fastening part;
a fourth T-shaped support (17) is fixedly arranged on the cylindrical surface of the upright post (7) facing the reaction wall (1), the fourth T-shaped support (17) is fixedly connected with the upright post (7) through a mobile positioning mechanism, and an inclined material fastening part is arranged at one end, far away from the upright post (7), of the fourth T-shaped support (17);
a third T-shaped support (14) is fixedly arranged on the bottom surface of the cross beam (15), the third T-shaped support (14) is fixedly connected with the cross beam (15) through a mobile positioning mechanism, and an inclined material fastening part is arranged at one end, far away from the cross beam (15), of the third T-shaped support (14);
a jack (11) is vertically arranged at a position corresponding to the third T-shaped support (14) on the horizontal ground, a second T-shaped support (13) is fixedly arranged at the top end of the jack (11), a load sensor (12) is arranged between the top end of the jack (11) and the second T-shaped support (13), and an inclined material fastening part is arranged at one end, far away from the jack (11), of the second T-shaped support (13); the jack (11) is externally provided with a sleeve (9) with an opening at the top end, the outer surface of the jack is provided with two longitudinal sliding chutes (91), the longitudinal sliding chutes (91) are positioned at two symmetrical sides of the sleeve (9), the longitudinal sliding chutes (91) do not penetrate through the side wall of the sleeve (9), the two longitudinal sliding chutes (91) are respectively in sliding connection with an L-shaped steel plate (10), and the top end of the L-shaped steel plate (10) is fixedly connected with a second T-shaped support (13);
the cross sections of the upright post (7) and the cross beam (15) are both H-shaped, a plurality of mounting holes are uniformly formed in the surface, opposite to the reaction wall (1), of the upright post (7) from top to bottom, and the bottom surface of the cross beam (15) is provided with uniformly distributed mounting holes in the length direction;
the electric control device comprises an industrial control computer, a load control loop, a load feedback loop and a data analysis output loop, wherein the industrial control computer is respectively and electrically connected with a built-in sensor of the servo actuator (3) and a load sensor (12) connected with the jack (11).
2. The angle iron cross slope stable bearing capacity test device according to claim 1, wherein the upright column (7) is fixedly connected with the reaction wall (1) through a horizontal pull rod (6), a first bolt fixing member (16) and a second bolt fixing member (21).
3. The angle iron cross diagonal stable bearing capacity test device according to claim 1 or 2, characterized in that a bracket (4) is fixed on the outer surface of the servo actuator (3), and a strut of the bracket (4) is fixedly connected with the reaction wall (1).
4. The angle iron cross diagonal member stable bearing capacity test device according to claim 1, wherein the upright column (7) further comprises two auxiliary upright columns (71), contact points of the auxiliary upright columns (71) and the upright column (7) with the horizontal ground (22) form an isosceles triangle, the bottom of the isosceles triangle is parallel to the side face, opposite to the upright column (7), of the reaction wall (1), the top ends of the two auxiliary upright columns (71) located on the bottom side of the isosceles triangle are connected through a top end cross beam (20), and the top end of the upright column (7) located on the top point of the isosceles triangle is connected with the top end cross beam (20) through a cross beam (15).
5. The angle iron cross diagonal stable bearing capacity test device according to claim 4, wherein a ground fixing steel beam (18) is fixed at the bottom end of the upright column (7), and an inclined oblique supporting steel beam (19) is fixed between the ground fixing steel beam (18) and the upright column (7).
6. A test method of the angle steel cross inclined material stable bearing capacity test device based on claim 1 is characterized by comprising the following steps:
the method comprises the following steps: fixedly connecting each end of the angle steel cross diagonal member (8) with the first to fourth T-shaped supports (5), (13), (14) and (17) respectively;
step two: controlling a servo actuator (3) and a jack (11) to apply pressure to the angle steel cross inclined material (8), and obtaining a load numerical value when the two ends of the angle steel cross inclined material (8) bear the pressure through a sensor arranged in the servo actuator (3) and a load sensor (12) connected with the jack (11);
step three: when the load value of one of the built-in sensors in the servo actuator (3) or the load sensors (12) connected with the jack (11) in the step two cannot be kept stable and is in a descending trend, the test in the step two is stopped, and the first descending load value is the maximum pressure which can be borne by the angle steel cross inclined material (8);
step four: controlling a servo actuator (3) to apply tension to horizontal angle steel in the angle steel cross inclined material (8), controlling a jack (11) to apply pressure to vertical angle steel in the angle steel cross inclined material (8), and obtaining load values when one end of the angle steel cross inclined material (8) bears pressure and the other end bears tension through a sensor arranged in the servo actuator (3) and a load sensor (12) connected with the jack (11);
step five: when the load value of the load sensor (12) connected with the jack (11) in the fourth step cannot be kept stable and is in a descending trend, the test is terminated, the corresponding load value is recorded, and the first descending load value is the maximum pressure which can be borne by the angle steel crossed diagonal member (8).
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| CN108627400B (en) * | 2018-04-17 | 2020-12-25 | 国网山西省电力公司电力科学研究院 | Device and method for testing stable bearing capacity of angle steel crossed inclined material |
| CN109297805B (en) * | 2018-09-03 | 2023-12-05 | 舟山启明电力设计院有限公司 | Single-section crossed inclined material horizontal type test device |
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| FR2194965A1 (en) * | 1972-08-04 | 1974-03-01 | Anvar | |
| JP2013092413A (en) * | 2011-10-25 | 2013-05-16 | Ihi Corp | Biaxial test device and biaxial test method |
| CN203037476U (en) * | 2012-12-24 | 2013-07-03 | 河海大学 | Portable automatic control beam column node two-way load interaction performance testing device |
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