CN109283058B - Adjustable three-dimensional loading test system suitable for steel concrete members with different sizes and shapes - Google Patents
Adjustable three-dimensional loading test system suitable for steel concrete members with different sizes and shapes Download PDFInfo
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- CN109283058B CN109283058B CN201811277780.9A CN201811277780A CN109283058B CN 109283058 B CN109283058 B CN 109283058B CN 201811277780 A CN201811277780 A CN 201811277780A CN 109283058 B CN109283058 B CN 109283058B
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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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
- G01N3/02—Details
- G01N3/04—Chucks
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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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
Abstract
The invention relates to a combined adjustable three-dimensional loading test system suitable for steel concrete members with different sizes and shapes, which comprises an assembled base, wherein a clip structure I capable of moving along the left and right directions of the assembled base is arranged on the assembled base, three clip structures II are arranged inside the clip structure I, the clip structure II in the middle is fixed, and the clip structures II on two sides can move along the front and back directions of the assembled base under the driving of a pushing oil cylinder; a lifting test platform is arranged in a space surrounded by the three clip-shaped structures II, a rear loading oil cylinder for loading the rear part of the reinforced concrete member is arranged on the clip-shaped structure I, and a side loading oil cylinder and an upper loading oil cylinder for loading the side part and the top part of the reinforced concrete member are arranged on the clip-shaped structure II; the loading oil cylinder is pushed and fixed through the pushing fixing device.
Description
Technical Field
The invention relates to a combined adjustable three-dimensional loading test system suitable for steel concrete members with different sizes and shapes.
Technical Field
At present, a large number of steel concrete members are used in various projects, and in order to meet the requirements of different projects, the steel concrete members with different sizes and different shapes need to be manufactured; in order to ensure the engineering quality and safety, the physical and mechanical parameters of the steel concrete member need to be measured in detail, and the steel concrete member needs to be subjected to a loading test. Because the steel concrete member has the characteristics of variable size and shape, indefinite loading position, and large yielding and breaking load, a test system which has large tonnage, high strength, flexible and adjustable loading position, is suitable for various member shapes and is convenient to operate is necessary for carrying out the loading test on the steel concrete member, but the existing steel concrete member loading test equipment has larger limitation. As follows:
the Chinese patent ZL201010546650.8 discloses a fatigue loading durability test device for a steel concrete member, which can simulate the deformation and damage conditions of the steel concrete member under the combined action of the conditions of fatigue load, chemical erosion, dry-wet cycle and the like, but is only suitable for plate type steel concrete members, and has the defects of non-adjustable size and poor universality.
Chinese patent ZL201510790592.6 discloses a steel concrete component pressurization test device under a salt spray environment, which can apply pressure load to a steel concrete component under the salt spray environment, has a wide loading range and can freely adjust the load value. However, the device is only suitable for the pressurization test of the regular cuboid reinforced concrete member, has poor universality and cannot adjust the loading position and the size of the test piece.
Chinese patent ZL200920110127.3 discloses a steel concrete member loading test device, which has a double-span beam structure, and can be used for connecting a loading cylinder to be installed on a connecting plate in advance and integrally hoisting and connecting the connecting plate and the loading cylinder on a double-span beam. The device has the advantages of clear structure and force transmission, economical materials and the like. The reaction frame of the test device is not a self-reaction device and has the defect of unadjustable size.
The Chinese patent ZL2011100390776 discloses a kiloton modular combined adjustable self-reaction rack device, can be used for carrying out a reinforced concrete loading test, and has the characteristics of simple structure, easiness in processing, steel saving, adjustable height and the like. However, the device is only height-adjustable, and cannot realize three-dimensional loading and three-dimensional size adjustment, and also cannot perform loading tests on large-size reinforced concrete members.
The existing test devices have various characteristics, but have great limitations as follows:
1) the test device has poor universality, and the position of the loading frame and the position of the loading oil cylinder cannot be adjusted at will according to the shape and the size of the reinforced concrete member;
2) the test device has a non-compact structure, and the loading space and the loading tonnage are small, so that the loading test of a large-size, large-tonnage and high-strength steel concrete member cannot be carried out;
3) the loading test device can not realize self-balancing, the loading frame can not automatically control the movement and locking, the installation and the use are inconvenient, and the flexibility is poor.
Disclosure of Invention
In order to overcome various defects of a steel concrete loading test device, the invention provides a multifunctional large-tonnage large-size self-balancing high-strength three-dimensional loading test system and a method thereof, which can adjust the position of a loading frame and the position of a loading oil cylinder according to the shape and the size of a steel concrete member and have better applicability and universality.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the combined adjustable three-dimensional loading test system is suitable for steel concrete members with different sizes and shapes, a loading counter-force frame of the test system is assembled by adopting steel structures welded and processed by thick steel plates, and comprises an assembled base, wherein a clip structure I capable of moving along the left and right directions of the assembled base is arranged on the assembled base, three clip structures II are arranged inside the clip structure I, the clip structure II in the middle is fixed, and the clip structures II on two sides can move along the front and back directions of the assembled base under the driving of a pushing oil cylinder; a lifting test platform is arranged in a space surrounded by the three clip-shaped structures II, a rear loading oil cylinder for loading the rear part of the reinforced concrete member is arranged on the clip-shaped structure I, and a side loading oil cylinder and an upper loading oil cylinder for loading the side part and the top part of the reinforced concrete member are arranged on the clip-shaped structure II; the loading oil cylinder is pushed and fixed through the pushing fixing device.
Furthermore, the upper part loading oil cylinders comprise three parts, and one upper part loading oil cylinder is arranged at the top of one clip structure II.
Furthermore, the side part loading oil cylinders comprise three side parts, and one side part loading oil cylinder is arranged on the side part of one clip structure II.
Furthermore, the three left and right square-shaped structures II are lower in height, and the front and back square-shaped structures I are higher in height and are lapped above the horizontal beam of the left and right square-shaped structures II.
Furthermore, the bottoms of the clip structures II positioned on the two sides can move back and forth through the guide fixing devices, and can be locked through the locking mechanism after moving in place.
Furthermore, the guiding and fixing device consists of a convex block body, a guide rail, a base plate, a fixing table and a fixing bolt, wherein the base plate is directly fixed on the assembled base, the guide rail is fixed on the base plate, the convex block body and the fixing table limit the upright post of the clip structure II to move up and down and left and right and can move back and forth along the guide rail, and the requirements of different loading positions of the side part can be met; the upright post of the clip structure II can be limited to move back and forth through the bolt hole of the fixing platform, the bolt hole of the base and the fixing bolt, so that the upright post is completely locked.
Furthermore, the clip structure I and the clip structure II respectively comprise two upright posts and a horizontal beam, the lower ends of the two upright posts are fixed on the assembled base, and the upper ends of the two upright posts are connected with the horizontal beam through a connecting piece.
Furthermore, the horizontal beam of the clip structure I is formed by overlapping a movable and a fixed shorter horizontal beam, the lower end of the upright column connected with the movable end is positioned in the assembled base guide groove, and the other upright column is fixed and unadjustable. The base guide groove can be used for moving the upright post left and right to adjust the loading position, and can also be used as a sliding opening structure, so that the reinforced concrete structural member can smoothly enter and exit in place.
Furthermore, a rear loading oil cylinder pushing fixing device is arranged on a horizontal beam of the clip structure I and consists of a pushing oil cylinder, a guide rail and a fixing bolt, so that the rear loading oil cylinder can be moved and fixed in the left and right directions, and the requirements of different loading positions on the rear part of the steel concrete member can be met.
Furthermore, an upper loading oil cylinder pushing fixing device is arranged on a horizontal beam of the square-shaped structure II; the upper loading oil cylinder pushing fixing device consists of a pushing oil cylinder, a guide rail, a loading oil cylinder fixing plate and a fixing bolt, so that the upper loading oil cylinder can move and be fixed in the left and right directions, and the requirements of different loading positions on the upper part of the reinforced concrete member can be met.
Furthermore, the upper end of the upright post is connected with the horizontal beam through a connecting piece, the connecting piece is of a plate type structure with a plurality of bolt holes, the upright post and the horizontal beam are respectively provided with a plurality of bolt holes matched with the connecting piece at different heights, the bolt holes at different heights can be selected to be connected through bolts, the height of the upper loading oil cylinder is adjusted, and the requirements of different loading heights on the upper part of the steel concrete member can be met.
Furthermore, the loading oil cylinder is connected with the upright post through a loading base plate, and the loading requirements of the steel concrete test pieces with different thicknesses can be met by adjusting the thickness of the loading base plate; bolt holes with different heights are arranged on each upright post, the bolt holes with different heights can be selected to be connected through bolts, the heights of the loading oil cylinders on the side part and the rear part are adjusted, and the requirements of different loading heights on the side part and the rear part can be met.
A lifting translation test platform is designed on the assembled base, and the lifting and translation of the test platform can be realized through the oil cylinder at the lower part during use. During testing, the upright column is moved away through the front upright column base guide groove, the reinforced concrete structural member is moved in, the reinforced concrete structural member is placed on the lifting translation test platform, the upright column is in position through the front upright column base guide groove, and loading test is started; and after the test is finished, the steel concrete member is moved out through the lifting translation test platform.
Each loading oil cylinder can realize independent servo control loading through a hydraulic loading system, the loading precision and stability are guaranteed, pressure can be maintained for a long time, and loading according to displacement or stress can be selected.
During testing, according to the specific size and shape of the reinforced concrete member and the position to be loaded, the reinforced concrete member is moved in through the lifting translation test platform, and the position of the side loading oil cylinder is adjusted through the side pushing oil cylinder and the side loading oil cylinder guiding and fixing device; the heights of the side part and the rear part of the loading oil cylinder are adjusted through different bolt holes on the inner side of the upright post; adjusting the position of the rear loading oil cylinder through the rear loading oil cylinder guiding and fixing device; the height of the upper loading oil cylinder is adjusted through different bolt holes of the connecting piece and different bolt holes of the upright post; adjusting the position of the upper loading oil cylinder through the upper loading oil cylinder guiding and fixing device; the distance between the side part loading oil cylinder and the back part loading oil cylinder to the opposite upright post is adjusted by the thickness of the loading base plate of the loading oil cylinder. Thereby meeting the requirements of three-dimensional loading tests of steel concrete members with different sizes and different shapes.
The invention has the following beneficial effects:
the system has the characteristics of multiple functions, large tonnage, large size, self-balance and high strength, can adjust the position of the loading frame and the position of the loading oil cylinder according to the shape and the size of the steel concrete member, can meet the three-dimensional loading test requirements of the steel concrete members with different sizes and shapes, and has better applicability and universality.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is an oblique view of the overall structure of the present invention;
FIG. 2 is a front view of the overall structure of the present invention;
FIG. 3 is a side view of the overall structure of the present invention;
FIG. 4 is a top view of the overall structure of the present invention;
FIG. 5 is a front elevational view of the post of the present invention;
FIG. 6 is a side view of the stud of the present invention;
FIG. 7 is a front view of the side load cylinder guide fixture of the present invention;
FIG. 8 is a top view of the side load cylinder guide fixture of the present invention;
FIG. 9 is a front view of the upper load cylinder pushing fixture of the present invention;
FIG. 10 is a top view of the upper load cylinder thrust attachment of the present invention;
FIG. 11 is a front view of the rear load cylinder thrust attachment of the present invention;
FIG. 12 is a top view of the rear load cylinder thrust attachment of the present invention;
FIG. 13 is a schematic view of a connector of the present invention;
FIG. 14 is a schematic view of a lift test platform of the present invention;
FIG. 15 is a schematic view of a reinforced concrete member that can be subjected to a loading test using the present test system;
fig. 16, 17 and 18 are three stress views of the steel concrete member which can be loaded by the test system.
Wherein: 1. left and right direction circle structure, 2, front and back direction circle structure, 3, upright post, 4, horizontal beam 5, assembled base, 6, connecting piece, 7, lateral loading oil cylinder guiding and fixing device, 8, pushing oil cylinder, 9, lateral loading oil cylinder, 10, back loading oil cylinder, 11, upper loading oil cylinder, 12, base guide groove, 13, guide rail, 14, convex block, 15, backing plate, 16, fixing table, 17, bolt hole, 18, upper loading oil cylinder pushing and fixing device, 19, back loading oil cylinder pushing and fixing device, 20, steel concrete member, 21, lifting test platform, 22, test platform lifting leg, 23, test platform rolling wheel, 24 and test platform bearing plate.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
The terms "mounted", "connected", "fixed", and the like in the present invention are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations;
the left-right direction square-shaped structure described in the embodiment section and the square-shaped structure II described in the summary section refer to the same component; the front-back direction square-shaped structure and the square-shaped structure I described in the summary of the invention refer to the same component;
as introduced by the background art, the defects in the prior art are that in order to solve the technical problems, the application provides a multifunctional, large-tonnage, large-size, self-balancing and high-strength three-dimensional loading test system; the loading counter-force frame of the test system is formed by assembling steel structures welded by thick steel plates, and the assembled base, the eight stand columns, the five horizontal beams and the connecting pieces form four self-counter-force frames in three directions together, so that the overall rigidity and strength are increased. Three side loading oil cylinders, three upper loading oil cylinders and one rear loading oil cylinder are arranged on the four clip-shaped self-reaction frames. The three left-right direction square-shaped structures are lower in height, the front-back direction square-shaped structures are higher in height, and the three left-right direction square-shaped structures are lapped above the left-right direction square-shaped structure horizontal beam. The middle upright posts of the three left-right square-shaped structures are fixed, the front and back movement of the upright posts is realized by the aid of guide fixing devices arranged at the lower ends of the front and back upright posts of the three left-right square-shaped structures, and the upright posts can be locked by the aid of locking mechanisms after being moved in place. The pushing oil cylinders are arranged among the three upright columns on the left and right sides, and the movement and fixation of the upright columns are realized through the pushing oil cylinders and the guide fixing devices, so that the requirements of different loading positions on the left and right sides of the reinforced concrete member can be met; the front and back direction returns the shape structure the stand lower extreme is fixed in on the assembled base, the upper end passes through the connecting piece with the horizontal beam is connected, the front and back direction returns the shape structure horizontal beam and is formed by a movable, the relatively short horizontal beam overlap joint of a fixed, and the lower extreme of the stand that movable one end is connected is located assembled base guide way, and another stand is fixed unadjustable. The base guide groove can be used for moving the upright post left and right to adjust the loading position, and can also be used as a sliding opening structure, so that the steel concrete structural member can smoothly enter and exit in place. A rear loading oil cylinder pushing and fixing device is arranged on the front-back direction square-shaped structure horizontal beam and consists of a pushing oil cylinder, a guide rail and a fixing bolt, so that the rear loading oil cylinder can move and be fixed in the left-right direction, and the requirements of different loading positions at the rear part of the steel concrete component can be met; the guide fixing device is composed of a convex block body at the lower end of the upright post, a guide rail, a base plate, a fixing table and a fixing bolt, wherein the base plate is directly fixed on the base, the guide rail is fixed on the base plate, the upright post is limited to move up and down and left and right by the convex block body and the fixing table and can move back and forth along the guide rail, the upright post can be limited to move back and forth by a fixing table bolt hole, a base bolt hole and the fixing bolt, so that the upright post can be completely locked, and the requirements of different loading positions of the side part can be met.
Specifically, the present invention will be described in detail below with reference to the accompanying drawings:
as shown in fig. 1 to 6 and 13, three upright columns 3 are respectively arranged on the left side surface and the right side surface, one upright column 3 is respectively arranged on the front surface and the rear surface, and bolt holes 17 with different heights are respectively arranged on the inner sides and the front side and the rear side of all upright columns 3; the loading oil cylinders are respectively arranged on the inner sides of the four stand columns and are connected with the stand columns through loading base plates, and the loading requirements of the steel concrete test pieces with different thicknesses can be met by adjusting the thicknesses of the loading base plates. The upright posts are provided with bolt holes with different heights, the bolt holes can be connected through bolts by selecting different heights, the heights of the side part loading oil cylinders and the rear part loading oil cylinders are adjusted, and the requirements of the side part loading oil cylinders and the rear part loading oil cylinders with different heights can be met.
The lower ends of four upright columns 3 at the front end and the rear end of the left side surface and the right side surface are provided with convex block bodies 14 and are connected with an assembled base 5 through a side loading oil cylinder guiding and fixing device 7, two upright columns 3 in the middle of the side part are directly connected with the assembled base 5 through bolt holes 17 and bolts, the upper ends of six upright columns 3 at the left side surface and the right side surface are connected with a horizontal beam 4 through a connecting piece 6 shown in figure 13, bolt holes 17 arranged on the connecting piece 12 and bolts, and a left-right square-shaped structure 1 is formed.
The lower end of the front upright post 3 is directly connected with the assembled base 5 through a bolt hole 17 and a bolt, and the lower end of the rear upright post 3 is placed in the base guide groove 12 and can move along a guide rail. The upper ends of the front and rear upright posts 3 are connected with the horizontal beam 4 through the connecting piece 6 and the bolt holes 17 and bolts arranged on the connecting piece 6, wherein the horizontal beam 4 consists of two shorter horizontal beams 4, the front horizontal beam 4 is fixed and immovable, and the rear horizontal beam 4 can move left and right, so that the front and rear square-shaped structures 2 are formed by the above structures.
The main frame of the test device is composed of three left-right direction square-shaped structures 1, a front-back direction square-shaped structure 2 and an assembled base 5, wherein the assembled base 5 is formed by assembling a plurality of small combined blocks through bolt holes 17 and bolts.
The horizontal beam 4 of the front-back direction square-shaped structure 2 is positioned above the horizontal beam 4 of the left-right direction square-shaped structure 1, the inner sides of the horizontal beams 4 of the three left-right direction square-shaped structures 1 are respectively provided with an upper loading oil cylinder 11, the inner sides of the rear upright columns 3 of the front-back direction square-shaped structure 2 are respectively provided with a rear loading oil cylinder 10, and the inner sides of one side upright columns 3 of the three left-right direction square-shaped structures 1 are respectively provided with a side loading oil cylinder 9.
An upper loading oil cylinder pushing fixing device 18 is respectively arranged on the horizontal beams 4 of the left and right square-shaped structures 1, a rear loading oil cylinder pushing fixing device 19 is arranged on the horizontal beam 4 of the front and rear square-shaped structures 2, and two pushing oil cylinders 8 are arranged between the three left and right square-shaped structures 1.
Fig. 7 and 8 are schematic diagrams of a guiding and fixing device 7 of a side loading oil cylinder, a base plate 15 is fixed on an assembled base 5, a guide rail 13 is connected with a convex part on the base plate 15 through a clamping groove, the vertical column 3 is limited to move up and down and left and right through a convex block 14 at the lower end of the vertical column 3 and a fixed table 16, the fixed table 16 can move back and forth along the guide rail 13, the fixed table 16 can be fixed through bolt holes 17 and bolts at different positions on the assembled base 5 and the fixed table 16 to limit the back and forth movement of the fixed table 16, and the vertical column 3 can be moved more conveniently through a roller type structure on the fixed table 16.
Fig. 9 and 10 are schematic diagrams of an upper loading oil cylinder pushing fixing device 18, an upper loading oil cylinder 11 is fixed on a horizontal beam 4 through an upper backing plate 15, a lower backing plate 15, an upper bolt hole 17 and a bolt, a guide rail 13 is arranged between the upper backing plate 15 and the horizontal beam 4, a pushing oil cylinder 8 is arranged on the horizontal beam 4, and one end of the pushing oil cylinder 8 is fixed on the upper backing plate 15.
Fig. 11 and 12 are schematic diagrams of a rear loading cylinder pushing fixing device 19, a horizontal beam 4 of a front-back direction square-shaped structure 2 is composed of two shorter horizontal beams 4, the front horizontal beam 4 is fixed and immovable, the rear horizontal beam 4 can move left and right, the rear loading cylinder pushing fixing device 19 is arranged above the horizontal beam 4, a base of the rear loading cylinder pushing fixing device is perpendicular to the horizontal beam 4, a guide rail 13 is arranged on the base, a fixed platform 16 is arranged on the guide rail 13, the fixed platform 16 is connected with the movable horizontal beam 4, one end of a pushing cylinder 8 is fixed on a base protruding steel plate, the other end of the pushing cylinder 8 is connected with the fixed platform 16, and the position of the horizontal beam can be fixed through a base bolt hole 17, a fixed platform bolt hole 17 and a bolt.
Fig. 14 is a schematic view of a lifting test platform 21, wherein a lifting translation test platform is designed on the assembled base, and the lifting and translation of the test platform can be realized through an oil cylinder at the lower part when the lifting translation test platform is used. During testing, the upright column is moved away through the front upright column base guide groove, the reinforced concrete structural member is moved in, the reinforced concrete structural member is placed on the lifting translation test platform, the upright column is in place through the front upright column base guide groove, and a loading test is started; and after the test is finished, the steel concrete member is moved out through the lifting translation test platform.
Specifically, the lifting test platform 21 consists of a test platform bearing plate 24, test platform lifting legs 22, test platform rollers 23 and bolt holes 17, wherein the test platform bearing plate 24 is used for placing a steel concrete member 20 to be subjected to a loading test; the main body of the test platform lifting leg 22 is a large-size telescopic oil cylinder, and the height of the steel concrete member 20 can be adjusted according to the test loading requirement; the test platform roller 23 can facilitate the moving in and out of the lifting platform 21; the steel concrete member 20 can be fixed through bolt holes 17 and screws arranged on the test platform bearing plate 24; the lifting test platform 21 can be fixed through the bolt holes 17 and the screw rods on the assembled base 5, and the stability of a loading test is guaranteed.
Fig. 15 and 16 are schematic diagrams of a reinforced concrete member 20 and a stress diagram of a loading test performed by the test system, the test system can be applied to reinforced concrete members 20 with different sizes and shapes, the schematic diagrams list one of the simpler reinforced concrete members 20 and explain the loading mode and the stress condition, and arrows indicate the stress condition of the reinforced concrete members 20.
During testing, the rear loading oil cylinder pushes the fixing device 19 and the front and rear direction front upright column base guide groove to move away the rear upright column 3, the steel concrete member 20 placed on the test platform bearing plate 24 is moved into a corresponding position in the test system through the lifting test platform 21, and the lifting test platform 21 is fixed through the bolt hole 17 and the screw rod on the assembled base 5; after the reinforced concrete member 20 is in place, the rear upright 3 is moved back to the corresponding position through the rear loading oil cylinder pushing fixing device 19 and the front and rear front upright base guide groove.
And determining the positions of the loading oil cylinders according to the sizes, the shapes and the loading positions of different reinforced concrete members 20. The upright post 3 of the left-right direction clip structure 1 moves back and forth along a guide rail 13 on the lower end side loading oil cylinder guide fixing device 7 through the extension and retraction of the side pushing oil cylinder 8, so that the two side loading oil cylinders 9 at the front end and the rear end are positioned at a test position; fixing the side loading oil cylinder 9 by selecting different bolt holes 17 on the inner side of the side upright post 3, so that the side loading oil cylinder 9 is positioned at the test height; the upper loading oil cylinder 11 is driven by the fixed platform 16 to move left and right by stretching the pushing oil cylinder 8 on the upper loading oil cylinder guide fixing device 18, so that the upper loading oil cylinder 11 is positioned at a test position; the front and the back of the upright post 3 of the left-right square-shaped structure 1 are respectively provided with bolt holes 17 with different heights, the connecting piece 6 is also provided with a plurality of bolt holes 17 with different heights, and the upright post 3 and the horizontal beam 4 are connected by selecting the bolt holes 17 with different heights, so that the horizontal beam 4 is positioned at different heights, and the upper loading oil cylinder 11 is positioned at a test height; the pushing oil cylinder 8 on the rear loading oil cylinder guiding and fixing device 19 stretches, so that the fixing platform 16 drives the horizontal beam 4 and the rear upright post 3 to move left and right, and the rear loading oil cylinder 10 is located at a test position; fixing the rear loading oil cylinder 10 by selecting different bolt holes 17 on the inner side of the rear upright post 3, so that the rear loading oil cylinder 10 is positioned at the test height; the distance between the side loading oil cylinder 9 and the rear loading oil cylinder 10 to the opposite upright post is adjusted by changing the thickness of the loading base plate of the loading oil cylinder; the height of the steel concrete member 24 placed on the test platform bearing plate 24 can be adjusted by adjusting the height of the test platform test leg 23 of the lifting test platform 21.
When the loading oil cylinder is positioned at the corresponding loading position of the reinforced concrete member 20, the servo control loading can be carried out on the reinforced concrete member 20 according to the displacement or the stress through a hydraulic loading system according to the test loading requirement.
After the loading process is finished, the loading oil cylinder is retracted, the rear part upright post 3 is moved away through the rear part loading oil cylinder pushing fixing device 19 and the front and rear direction upright post base guide groove, the steel concrete member 20 placed on the test platform bearing plate 24 is moved out of the test system through the lifting test platform 21, and the test is finished.
The hydraulic loading system and the loading oil cylinder can realize independent servo control loading, ensure the loading precision and stability, maintain pressure for a long time and select loading according to displacement or stress.
Claims (8)
1. The combined adjustable three-dimensional loading test system is characterized by comprising an assembled base, wherein a clip structure I capable of moving along the left and right directions of the assembled base is arranged on the assembled base, three clip structures II are arranged inside the clip structure I, the clip structure II in the middle is fixed, and the clip structures II on two sides can move along the front and back directions of the assembled base under the driving of a pushing oil cylinder; a lifting test platform is arranged in a space surrounded by the three clip-shaped structures II, a rear loading oil cylinder for loading the rear part of the reinforced concrete member is arranged on the clip-shaped structure I, and a side loading oil cylinder and an upper loading oil cylinder for loading the side part and the top part of the reinforced concrete member are arranged on the clip-shaped structure II; the loading oil cylinder is pushed and fixed through the pushing fixing device;
the square-shaped structure I and the square-shaped structure II respectively comprise two upright posts and a horizontal beam, the lower ends of the two upright posts are fixed on the assembled base, and the upper ends of the upright posts are connected with the horizontal beam through connecting pieces; bolt holes with different heights are arranged on each upright post, the bolt holes with different heights are selected to be connected through bolts, and the heights of the loading oil cylinders at the side part and the rear part are adjusted, so that the requirements of different loading heights at the side part and the rear part can be met;
an upper loading oil cylinder pushing fixing device is arranged on a horizontal beam of the clip structure II; the upper loading oil cylinder pushing fixing device consists of a pushing oil cylinder, a guide rail, a loading oil cylinder fixing plate and a fixing bolt, so that the upper loading oil cylinder can move and be fixed in the left and right directions, and the requirements of different loading positions on the upper part of the reinforced concrete member can be met; the upper loading oil cylinder is fixed on the horizontal beam through an upper backing plate, a lower backing plate and a bolt, a guide rail is arranged between the upper backing plate and the horizontal beam, a pushing oil cylinder is arranged on the horizontal beam, one end of the pushing oil cylinder is fixed on the upper backing plate, and the upper loading oil cylinder is moved left and right through stretching of the pushing oil cylinder, so that the upper loading oil cylinder is located at a test position.
2. The combination adjustable three-dimensional loading test system suitable for the steel concrete members with different sizes and shapes as claimed in claim 1, wherein the bottom of the clip structures II at two sides can move back and forth through a guide fixing device, and can be locked through a locking mechanism after moving in place.
3. The combined adjustable three-dimensional loading test system suitable for the steel concrete members with different sizes and shapes as claimed in claim 2, wherein the guiding and fixing device is composed of a convex block, a guide rail, a base plate, a fixing table and a fixing bolt, wherein the base plate is directly fixed on the assembled base, the guide rail is fixed on the base plate, the convex block and the fixing table limit the upright post of the clip structure II to move up and down and left and right and can move back and forth along the guide rail; the upright post of the clip structure II can be limited to move back and forth through the bolt hole of the fixing platform, the bolt hole of the base and the fixing bolt, so that the upright post is completely locked.
4. The combination adjustable three-dimensional loading test system suitable for the steel concrete members with different sizes and shapes as claimed in claim 1, wherein the horizontal beam of the clip structure I is formed by overlapping a movable and a fixed shorter horizontal beam, the lower end of the upright column connected with the movable end is positioned in the assembled base guide groove, and the other upright column is fixed and unadjustable; the base guide groove can be used for moving the upright post left and right to adjust the loading position, and can also be used as a sliding opening structure, so that the reinforced concrete structural member can smoothly enter and exit in place.
5. The combined adjustable three-dimensional loading test system suitable for the steel concrete members with different sizes and shapes as claimed in claim 1, wherein a horizontal beam of the square-shaped structure I is provided with a rear loading oil cylinder pushing fixing device, the rear loading oil cylinder pushing fixing device is composed of a pushing oil cylinder, a guide rail and a fixing bolt, the rear loading oil cylinder is moved and fixed in the left and right direction, and the requirements of different loading positions of the rear part of the steel concrete member can be met.
6. The combined adjustable three-dimensional loading test system suitable for the steel concrete members with different sizes and shapes as claimed in claim 1, wherein the connecting member is a plate structure with a plurality of bolt holes, the upright column and the horizontal beam are respectively provided with a plurality of bolt holes matched with the connecting member at different heights, and the bolt holes at different heights can be selected to be connected through bolts, so that the height of the upper loading oil cylinder can be adjusted, and the requirements of the upper part of the steel concrete member at different loading heights can be met.
7. The combined adjustable three-dimensional loading test system suitable for the steel concrete members with different sizes and shapes as claimed in claim 1, wherein the loading oil cylinder is connected with the upright post through a loading base plate, and the loading requirements of the steel concrete test pieces with different thicknesses can be met by adjusting the thickness of the loading base plate.
8. The combined adjustable three-dimensional loading test system suitable for the steel concrete members with different sizes and shapes as claimed in claim 1, wherein each loading oil cylinder can realize independent servo control loading through a hydraulic loading system, the loading precision and stability are ensured, the pressure can be maintained for a long time, and the loading according to the displacement or the stress can be selected.
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| CN110220761A (en) * | 2019-07-14 | 2019-09-10 | 湖南军成科技有限公司 | A kind of adjustable geomechanics sample assembly and actuating system |
| CN110220770A (en) * | 2019-07-14 | 2019-09-10 | 湖南军成科技有限公司 | A kind of three-dimensional geological mechanical model analogue system |
| CN112630004A (en) * | 2020-12-24 | 2021-04-09 | 海南大学 | Low-cycle repeated loading test device |
| CN113602523B (en) * | 2021-07-21 | 2024-01-12 | 成都飞机工业（集团）有限责任公司 | Loading system for wing load calibration test and application method thereof |
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