CN106370415B - A kind of automatic control uniaxial force component Cyclic Loading loading device and application method - Google Patents

A kind of automatic control uniaxial force component Cyclic Loading loading device and application method Download PDF

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Publication number
CN106370415B
CN106370415B CN201610934191.8A CN201610934191A CN106370415B CN 106370415 B CN106370415 B CN 106370415B CN 201610934191 A CN201610934191 A CN 201610934191A CN 106370415 B CN106370415 B CN 106370415B
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horizontal
crossbeam
test specimen
loading
measured
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CN106370415A (en
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杨俊芬
战宇皓
程锦鹏
谢坚
李宝琪
闫西峰
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts

Abstract

The invention belongs to steel building fields, and in particular to a kind of automatic control uniaxial force component Cyclic Loading loading device and application method.Including the fixed device of external frame, the fixed device of external frame is equipped with the test specimen loading device for treating test block load, is connected with data collection system on test specimen loading device;The fixed device of external frame is equipped with second cross beam and third crossbeam;Test specimen loading device includes horizontal actuator, horizontal load sensor and connecting rod, horizontal actuator and horizontal load sensor are connect with data collection system respectively, left end is fixedly connected with second cross beam, right end is connect by the first connecting hinge with the left end of test specimen to be measured, the right end of test specimen to be measured is fixedly connected with horizontal load sensor, horizontal load sensor and connecting rod, which relatively rotate, to be connected, and connecting rod is hinged by the second connecting hinge and third crossbeam;Horizontal actuator, test specimen to be measured, horizontal load sensor and connecting rod are coaxial and horizontal, and simple structure is readily transported and places.

Description

A kind of automatic control uniaxial force component Cyclic Loading loading device and application method
[technical field]
The invention belongs to steel building fields, and in particular to a kind of automatic control uniaxial force component Cyclic Loading load Device and application method.
[background technique]
In field of steel structure, uniaxial force component is widely used in various load steel structures, such as roof truss, bracket, tower Frame, rack, in various types of planes such as reticulated shell or space lattice formula system and support system.Its static(al) and Hysteresis Behavior Quality has a significant impact to integrally-built anti-seismic performance, and the accurate static(al) for testing uniaxial force component and Hysteresis Behavior are to reflection Deformation behaviour, Stiffness Deterioration and the energy consumption aspect of structure are of great significance.
In the past main to the research in terms of the static(al) and Hysteresis Behavior of uniaxial force component is all the Specialty Experiment in colleges and universities Room carries out, and since experiment loading device is not easy to mobile and the characteristics of transport, there are certain limitations, at the construction field (site) with it is certain Component can not be tested under specific environment.Currently, a kind of portable axle center primary structure member of few professions loads automatically Device, while again since uniaxial force component there are the initial imperfections such as inital bending and first bias and lacks corresponding lateral branch Support is easy to that the local failure of component is made first to occur to lead to experimental precision and result before integrally destroying during loading It is greatly affected.
[summary of the invention]
It is an object of the invention to overcome the above-mentioned prior art, a kind of automatic control uniaxial force component is provided Cyclic Loading loading device and application method.The device simple structure, is readily transported and places, it is only necessary to local disassembly and group Dress, can use at the construction field (site) or under certain specific environments, while can effectively guarantee the precision of test again.
A kind of automatic control uniaxial force component Cyclic Loading loading device, including the fixed device of external frame, external frame The fixed device of frame is equipped with the test specimen loading device for treating test block load, and data acquisition is connected on test specimen loading device System;
The fixed device of external frame is equipped with second cross beam and third crossbeam detachable and be parallel to each other;
Test specimen loading device includes horizontal actuator, horizontal load sensor and connecting rod, horizontal actuator and horizontal lotus Set sensor is connect with data collection system respectively, and the left end of horizontal actuator is fixedly connected with second cross beam, and right end passes through the One connecting hinge is connect with the left end of test specimen to be measured, and the right end of test specimen to be measured is fixedly connected with horizontal load sensor, horizontal loading Sensor and connecting rod, which relatively rotate, to be connected, and connecting rod is hinged by the second connecting hinge and third crossbeam;
Horizontal actuator, test specimen to be measured, horizontal load sensor and connecting rod are coaxial and horizontal.
The right end of the horizontal load sensor is equipped with internal screw thread, and the left end of connecting rod is equipped with outer with the screw-internal thread fit Screw thread, horizontal load sensor and connecting rod are relatively rotated by internal and external screw thread and are connected.
The fixed device of the external frame is equipped with the 4th crossbeam, and the 4th crossbeam is equipped with test piece fixing device, and test specimen is solid Device is determined for clamping test specimen to be measured, prevents test specimen to be measured during loading since unstability outside plane occurs for the factors such as bias.
The test piece fixing device includes for clamping the sliding fixture of test specimen to be measured, two-way lead screw and being fixed on the 4th cross Connecting plate on beam, perforation opens up swallowtail-shaped slide, the axis for opening up direction Yu test specimen to be measured of swallowtail-shaped slide on connecting plate Vertically;
Sliding fixture includes symmetrical left sliding fixture and right sliding fixture, and the lower end of sliding fixture is and swallowtail-shaped slide Compatible sliding block and be arranged in swallowtail-shaped slide, be connected separately with left push rod and the right side on left sliding fixture and right sliding fixture Push rod;
The both ends of two-way lead screw, which are respectively cooperating with, is provided with the first attaching nut and the second attaching nut, the first attaching nut and Second attaching nut connect with left push rod and right push rod respectively, by rotating two-way lead screw, makes left sliding fixture and right slip clamp Tool is synchronous towards or away from movement.
The middle part of test specimen to be measured is arranged in the sliding fixture, and sliding fixture center offers and test specimen cross section to be measured phase It is adapted for clamping the groove of test specimen to be measured, the axle center of groove and test specimen to be measured are coaxial.
The fixed device of the external frame includes i-shape steel beam cushion cap arranged side by side, i-shape steel beam cushion cap or so two Side is connected separately with trapezoid horizontal reaction frame and triangle reaction frame, and the both ends of second cross beam are anti-with trapezoid horizontal side by side respectively The connection of power frame, the both ends of third crossbeam are connect with triangle reaction frame side by side respectively, in trapezoidal water on i-shape steel beam cushion cap It is equipped with column between flat reaction frame and triangle reaction frame, passes through first crossbeam between ipsilateral column and trapezoid horizontal reaction frame Connection, first crossbeam is parallel with i-shape steel beam cushion cap and the upper end of column is arranged in, and is connected with the 4th between column side by side Crossbeam.
The first crossbeam, second cross beam, third crossbeam, the 4th crossbeam and column are I-shaped crossbeam, i shaped steel Joist support platform, the wing plate of first crossbeam and the 4th crossbeam are setting up and down, the wing plate of second cross beam, third crossbeam and column left and right Setting, the both ends of the 4th crossbeam and the web of column connect, and the both ends of second cross beam and first on trapezoid horizontal reaction frame stand The web of column connects.
It is equipped in the trapezoid horizontal reaction frame and prestressed prestressed cable, prestressing force is applied to trapezoid horizontal reaction frame The upper end of cable wire is connect with the upper beam of trapezoid horizontal reaction frame, and lower end is connect with i-shape steel beam cushion cap.
The data collection system includes computer, hydraulic oil source, controller and multichannel strain acquirement instrument, and hydraulic oil source is logical It crosses hydraulic oil pipe to be connected with horizontal actuator, the output end of controller passes through the quad control terminal with horizontal actuator respectively And the control terminal of hydraulic oil source is connected, the output end of horizontal load sensor is connected with the input terminal of multichannel strain acquirement instrument It connects, the output end of multichannel strain acquirement instrument is connected with computer.
A kind of application method automatically controlling uniaxial force component Cyclic Loading loading device, when in use, including it is as follows Step,
The fixed device of external frame is first placed on level ground, and second cross beam is mounted on external frame by step 1 On the fixed device of frame;
The left end of horizontal actuator: being fixedly connected by step 2 with second cross beam again, right end by the first connecting hinge with to The left end of test block connects, and the right end of test specimen to be measured is fixedly connected with horizontal load sensor, horizontal load sensor with connect Bar relatively rotates connection, and connecting rod is hinged by the second connecting hinge and third crossbeam, then third crossbeam is mounted on external frame On fixed device, keep horizontal actuator, test specimen to be measured, horizontal load sensor and connecting rod coaxial;
Step 3, then horizontal actuator and horizontal load sensor are connect with data collection system respectively;
Step 4 when just needing to test, applies horizontal loading to test specimen by data collection system controlled level actuator It destroys, and horizontal force and displacement in collection process;According to the horizontal displacement at the horizontal force that is recorded and horizontal force action point, Draw the load-displacement curve of test specimen to be measured.
The invention has the following beneficial effects:
Automatic control uniaxial force component Cyclic Loading loading device of the invention fixes device by setting external frame, Test specimen loading device is mounted on the fixed device of external frame, since the fixed device of external frame belongs to the dress of Integral movable Set so that the present invention is readily transported and places, by be detachably arranged on external framing fixture second cross beam and The left end of third crossbeam, horizontal actuator is fixedly connected with second cross beam, and right end passes through a left side for the first connecting hinge and test specimen to be measured End connection, the right end of test specimen to be measured are fixedly connected with horizontal load sensor, and horizontal load sensor and connecting rod relatively rotate Connection, connecting rod by the second connecting hinge and third crossbeam it is hinged, horizontal actuator, test specimen to be measured, horizontal load sensor and Connecting rod is coaxial, and horizontal actuator and horizontal load sensor are connect with data collection system respectively;By by second cross beam and Third crossbeam and the fixed device of external frame are set as detachable, therefore are convenient for disassembly and reassembly of the invention, lead to It crosses at above-mentioned two and is hinged, the concentricity after ensure that horizontal actuator, test specimen to be measured, horizontal load sensor connection, so that Test specimen to be measured remains two power rod pieces, is solely subjected to horizontal axis power, by relatively rotating horizontal load sensor and connecting rod Connection, when slight torsion occurs during loading, since the rotation connection can effectively uninstall the torque of generation, Avoid during loading test specimen to be measured by shear stress, interference experiment result;When in use, pass through data collection system standard True controlled level actuator applies horizontal loading.Therefore, the static(al) and Hysteresis Behavior for solving uniaxial force component can only be in height The defect that the specialized laboratory in school carries out, so that component can be tested under certain specific environments at the construction field (site), And it can effectively ensure that the precision of test again.
Further, the present invention is by being set as internal screw thread, the left end setting of connecting rod for the right end of horizontal load sensor With the external screw thread of the screw-internal thread fit, horizontal load sensor and connecting rod are relatively rotated by internal and external screw thread and are connected, and are passed through Internal and external screw thread structure not only ensure that test specimen to be measured avoids the interference by torque, moreover, the length when test specimen to be measured changes When, additionally it is possible to influence of the length difference to installation of test specimen to be measured is eliminated by the internal and external screw thread structure.
Further, examination is arranged on the 4th crossbeam by the way that the 4th crossbeam is arranged on external framing fixture in the present invention Part fixes device, clamps test specimen to be measured by test piece fixing device during loading, can prevent test specimen to be measured from loading Since unstability outside plane occurs for the factors such as bias in journey.
Further, test piece fixing device of the invention is sliding by the way that the swallow-tail form vertical with the axis of test specimen to be measured is arranged The sliding fixture for clamping test specimen to be measured is arranged on swallowtail-shaped slide for slot, then by the way that two-way lead screw is arranged come so that left sliding Fixture is synchronous with right sliding fixture to clamp test specimen to be measured towards or away from mobile, ensure that sliding fixture is clamping test specimen to be measured Shi Buhui treats test block and generates external force to interference effect experimental result, meanwhile, during loading, test specimen to be measured can be prevented During loading since unstability outside plane occurs for the factors such as bias.
Further, trapezoidal water is respectively set in the both ends of the i-shape steel beam cushion cap of the fixed device of external frame of the invention Flat reaction frame and triangle reaction frame, ensure that integrally-built strength and stiffness.
Further, the present invention is by being work by first crossbeam, second cross beam, third crossbeam, the 4th crossbeam and column Font crossbeam, i-shape steel beam cushion cap, the wing plate of first crossbeam and the 4th crossbeam are setting up and down, second cross beam, third crossbeam With the equal left and right settings of wing plate of column, the both ends of the 4th crossbeam and the web of column are connected, the both ends of second cross beam and trapezoidal water The web of the first column on flat reaction frame connects, this to design the loading characteristic for taking full advantage of I-steel, ensure that this hair The reasonability of bright overall structure stress.
Further, the present invention is prestressed to the application of trapezoid horizontal reaction frame by being arranged in trapezoid horizontal reaction frame Prestressed cable, to eliminate the inelastic deformation of cable wire initial stage, improve trapezoid horizontal reaction frame bending resistance and just Degree, increases its durability.
[Detailed description of the invention]
Fig. 1 is overall structure diagram of the invention;
Top view Fig. 1 (a) of the invention;
Fig. 1 (b) is the structural schematic diagram of trapezoid horizontal reaction frame in the present invention;
Fig. 1 (c) is the structural schematic diagram of intermediate cam shape reaction frame of the present invention;
Fig. 2 is the structural schematic diagram of test specimen loading device in the present invention;
Fig. 3 is the structural schematic diagram of test piece fixing device in the present invention;
Fig. 4 is the structural schematic diagram of data collection system in the present invention;
Wherein, 1- trapezoid horizontal reaction frame, the first column of 1-1-, 1-2- upper beam, 2- prestressed cable, 3- column, 4- First ground anchor bolt, 5- i-shape steel beam cushion cap, 6- first crossbeam, the second ground anchor bolt of 7-, 8- triangle reaction frame, 9- first End plate, 10- high-strength bolt, 11- second cross beam, 11-1- third crossbeam, the 4th crossbeam of 11-2-, the horizontal actuator of 12-, 13- are waited for Test block, 14- horizontal load sensor, 15- connecting rod, the first connecting hinge of 16-, the second connecting hinge of 16-1-, the second end plate of 17-, 18- bottom plate, 19- connecting plate, 19-1- swallowtail-shaped slide, the left sliding fixture of 20-1-, the right sliding fixture of 20-2-, the left push rod of 21-, The right push rod of 21-1-, the two-way lead screw of 22-, the first attaching nut of 23-, the second attaching nut of 23-1-, 24- fixture nut, 25- electricity Brain, 26- hydraulic oil source, 27- hydraulic oil pipe, 28- quad, 29- controller, 30- multichannel strain acquirement instrument.
[specific embodiment]
The invention will be described in further detail with reference to the accompanying drawing:
As shown in Figures 1 to 4, automatic control uniaxial force component Cyclic Loading loading device of the invention, including outside Framing fixture, the fixed device of external frame are equipped with the test specimen loading device for treating the load of test block 13, and test specimen adds It carries to set and is connected with data collection system;
The fixed device of external frame includes i-shape steel beam cushion cap 5 arranged side by side, 5 left and right sides of i-shape steel beam cushion cap It is connected separately with trapezoid horizontal reaction frame 1 and triangle reaction frame 8, is equipped in trapezoid horizontal reaction frame 1 to trapezoid horizontal counter-force Frame 1 applies prestressed prestressed cable 2, and the upper end of prestressed cable 2 is connect with the upper beam 1-2 of trapezoid horizontal reaction frame 1, Lower end is connect with i-shape steel beam cushion cap 5, and the both ends of second cross beam 11 are connect with trapezoid horizontal reaction frame 1 side by side respectively, the The both ends of three crossbeam 11-1 are connect with triangle reaction frame 8 side by side respectively, in trapezoid horizontal counter-force on i-shape steel beam cushion cap 5 It is equipped with column 3 between frame 1 and triangle reaction frame 8, passes through first crossbeam 6 between ipsilateral column 3 and trapezoid horizontal reaction frame 1 Connection, first crossbeam 6 is parallel with i-shape steel beam cushion cap 5 and the upper end of column 3 is arranged in, and is connected between column 3 side by side 4th crossbeam 11-2;
First crossbeam 6, second cross beam 11, third crossbeam 11-1, the 4th crossbeam 11-2 and column 3 are I-shaped crossbeam, I-shape steel beam cushion cap 5, first crossbeam 6 and the wing plate of the 4th crossbeam 11-2 are setting up and down, second cross beam 11, third crossbeam The equal left and right settings of the wing plate of 11-1 and column 3, the both ends of the 4th crossbeam 11-2 are connect with the web of column 3, second cross beam 11 Both ends are connect with the web of the first column 1-1 on trapezoid horizontal reaction frame 1;
Test specimen loading device includes horizontal actuator 12, horizontal load sensor 14 and connecting rod 15, horizontal actuator 12 It is connect respectively with data collection system with horizontal load sensor 14, the left end of horizontal actuator and the fixed company of second cross beam 11 It connects, right end is connect by the first connecting hinge 16 with the left end of test specimen 13 to be measured, and the right end and horizontal loading of test specimen 13 to be measured sense Device 14 is fixedly connected, and the right end of horizontal load sensor 14 is equipped with internal screw thread, and the left end of connecting rod 15 is equipped with matches with the internal screw thread The external screw thread of conjunction, horizontal load sensor 14 and connecting rod 15 are relatively rotated by internal and external screw thread and are connected, and connecting rod passes through second Connecting hinge 16-1 and third crossbeam 11-1 are hinged;
4th crossbeam 11-2 setting is equipped with test piece fixing device upper, and test piece fixing device is used to clamp test specimen 13 to be measured, Prevent test specimen to be measured during loading since unstability outside plane occurs for the factors such as bias;
Test piece fixing device includes for clamping the sliding fixture of test specimen 13 to be measured, two-way lead screw 22 and being fixed on the 4th cross Connecting plate 19 on beam, perforation opens up swallowtail-shaped slide 19-1 on connecting plate 19, swallowtail-shaped slide 19-1 open up direction with to The axis of test block 13 is vertical, and sliding fixture is arranged in the middle part of test specimen 13 to be measured, sliding fixture center offer with it is to be tested 13 cross section of part is adapted the groove for clamping test specimen to be measured, and the axle center of groove and test specimen 13 to be measured are coaxial;
Sliding fixture includes symmetrical left sliding fixture 20-1 and right sliding fixture 20-2, and the lower end of sliding fixture is and swallow The compatible sliding block of tail shape sliding slot 19-1 and be arranged in swallowtail-shaped slide 19-1, left sliding fixture 20-1 and right sliding fixture Left push rod 21 and right push rod 21-1 are connected separately on 20-2;
The both ends of two-way lead screw 22, which are respectively cooperating with, is provided with the first attaching nut 23 and the second attaching nut 23-1, and first connects Connected nut 23 and the second attaching nut 23-1 are connect with left push rod 21 and right push rod 21-1 respectively, by rotating two-way lead screw 22, Keep left sliding fixture 20-1 and right sliding fixture 20-2 synchronous towards or away from movement;
Horizontal actuator 12, test specimen to be measured 13, horizontal load sensor 14 and connecting rod 15 are coaxial and horizontal;
Data collection system includes computer 25, hydraulic oil source 26, controller 29 and multichannel strain acquirement instrument 30, hydraulic oil Source 26 is connected 12 with horizontal actuator by hydraulic oil pipe 27, the output end of controller 29 pass through quad 28 respectively with level The control terminal of actuator 12 and the control terminal of hydraulic oil source 26 are connected, and output end and the multichannel of horizontal load sensor 14 are answered The input terminal for becoming Acquisition Instrument 30 is connected, and the output end of multichannel strain acquirement instrument 30 is connected with computer 25.
The lower end of trapezoid horizontal reaction frame 1 of the invention is connect by the first ground anchor bolt 4 with I-shaped crossbeam cushion cap 5, 1 upper end of trapezoid horizontal reaction frame is fixedly connected with the left end of first crossbeam 6, is passed through in the right end and column 3 of first crossbeam 6 high-strength Bolt 10 is connected and is fixedly connected on i-shape steel beam cushion cap 5 by the first ground anchor bolt 4 together, the triangle counter-force Frame 8 is fixedly connected by the second ground anchor bolt 7 with i-shape steel beam cushion cap 5.
4th crossbeam 11-2 of the invention is fixedly connected by end plate with column 3,18 lower surface of bottom plate and the 4th crossbeam 11- 2 welding form entirety, and 18 upper surface of bottom plate is welded with connecting plate 19, and perforation opens up swallowtail-shaped slide 19-1 on connecting plate 19, sliding Dynamic fixture opens up semi-circular recesses at left and right ends (i.e. left sliding fixture 20-1, right sliding fixture 20-2) respectively, and composition is round For groove to clamp test specimen 13 to be measured, fixture nut 24 rotates the both ends for being connected to two-way lead screw, to sliding fixture clamp to After test block 13, fixture nut 24 is in contact with attaching nut and pretightning force is applied to it, to make sliding fixture stabilization clamp Hold test specimen 13 to be measured.
Second cross beam 11 of the invention is stood by the first of high-strength bolt 10 and first end plate 9 and trapezoid horizontal reaction frame 1 Column 1-1 is connected, and the left end of horizontal actuator 12 is connected by the second end plate 17 with second cross beam 11, the right side of horizontal actuator 12 End is connected by end plate and the first connecting hinge 16 with test specimen 13 to be measured, the left end of horizontal load sensor 14 by end plate and to Test block 13 is connected, and connecting rod right end is connect by end plate with the second connecting hinge 16-1, and the second connecting hinge 16-1 passes through end plate It is connected with third crossbeam 11-1.
It should be understood that the present invention is with the citing of round steel pipe component, it is not limited to in the performance test of round steel pipe, lead to It crosses and the groove of sliding fixture in test piece fixing device is processed according to corresponding member section form, various sections can be met The test of face form axle center primary structure member static(al) and Hysteresis Behavior.
The present invention have the following the utility model has the advantages that
1, the present invention automatically controls uniaxial force component Cyclic Loading loading device when specific operation, using horizontal actuation Device 12 and connecting rod 15 carry out loading level load, by computer 25 and the horizontal actuator 12 of 29 flexible modulation of controller, are loading High-precision control is carried out by the stroke of 25 pairs of computer horizontal actuator 12 in the process.
2, test specimen 13 to be measured can effectively be clamped by sliding fixture, prevents test specimen 13 to be measured during loading due to inclined The outer unstability of plane occurs for the factors such as the heart;It can be according to the actual size adjusting post 13 of test specimen 13 to be measured and first crossbeam 6 Position, while test specimen to be measured 13 and loading device are easy to connect, need to can only be met by the position that mobile connection is cut with scissors to difference The test of the uniaxial force component of type.
3, all loaded members can be dismantled and be assembled, transport convenience, and simple structure, and occupied area is small, both The requirement of construction site or certain specific environments is met, while the precision of experiment can be effectively ensured again.
Operating process of the invention is divided into five steps, specifically:
Step 1: two 5 horizontal alignments of i-shape steel beam cushion cap are placed on the ground, and by trapezoid horizontal reaction frame 1 It is placed on 5 left side of i-shape steel beam cushion cap, is connected and fixed by the first ground anchor bolt 4, then triangle reaction frame 8 is placed on work The right side of shaped girder steel cushion cap 5 is connected and fixed by the second ground anchor bolt 7;By high-strength bolt 10 by the left end of first crossbeam 6 Be connected with the upper end of the first column 1-1 of trapezoid horizontal reaction frame 1, then by high-strength bolt 10 by the right end of first crossbeam 6 and The upper end of column 3 connects, and is fixed on i-shape steel beam cushion cap 5 together by the first ground anchor bolt 4, passes through prestressed cable 2 pairs of trapezoid horizontal reaction frames 1 apply prestressing force;
Step 2: by high-strength bolt 10 and end plate 9 the 4th crossbeam 11-2 is fixedly connected among two columns 3 vertical On the web of column 3, and both ends is kept to be in same level;And it is welded in the edge of a wing upper surface middle of the 4th crossbeam 11-2 One piece of bottom plate 18 forms an entirety, and connecting plate 19 is welded on 18 upper surface of bottom plate, makes the swallowtail-shaped slide on connecting plate 19 1-1 is vertical with the axis of test specimen 13 to be measured, and sliding fixture 20 is arranged symmetrically in swallowtail-shaped slide, when needing to clamp steel pipe When, it is in contact by rotary fixing screw mother with attaching nut and applies pretightning force to it to which to make sliding fixture to be tested to clamp Part;
Step 3: the both ends of second cross beam 11 are passed through high-strength bolt 10 and end plate and the first of trapezoid horizontal reaction frame 1 Column 1-1 is connected, and the left end of horizontal actuator 12 passes through two edges of a wing of end plate and second cross beam 11 by long anchor pole to fix Connection, the right end of horizontal actuator 12 is connected by end plate and the first connecting hinge 16 with the left end of test specimen 13 to be measured, to be tested The right end of part 13 is connect by end plate and high-strength bolt with the left end of horizontal load sensor 14, the right side of horizontal load sensor 14 End screws in connection by the connecting rod 15 with screw thread, and the right end of connecting rod 15 passes through the second connecting hinge 16-1 and end plate connection, The end plate connected on second connecting hinge 16-1 passes through two edges of a wing of the end plate and third crossbeam 11-1 by long anchor pole to fix Second I-shaped crossbeam 11, is finally connected by high-strength bolt 10 and end plate with the intermediate both ends of triangle reaction frame 8 by connection;
Step 4: hydraulic oil source 26 is connected by hydraulic oil pipe 27 with horizontal actuator 12, the output end of controller 29 and The control terminal of horizontal actuator 12 and the control terminal of hydraulic oil source 26 are connected by quad 28, horizontal load sensor 14 Output end be connected with the input terminal of multichannel strain acquirement instrument 30, the output end of multichannel strain acquirement instrument 30 and computer 25 It is connected to acquire data;
Step 5: applying horizontal loading by computer 25 and 29 controlled level actuator 12 of controller when needing to test To design value, apply Cyclic Loading according to the horizontal addload system control actuator of experimental program until test specimen destroys, and passes through Horizontal force P (t) and displacement S (t) during computer and the acquisition test of multichannel strain acquirement instrument;According to being remembered during test The horizontal force P (t) and the horizontal displacement S (t) at horizontal force action point of record, draw the load-displacement curve of test specimen to be measured.

Claims (6)

1. a kind of automatic control uniaxial force component Cyclic Loading loading device, which is characterized in that including the fixed dress of external frame It sets, the fixed device of external frame is equipped with the test specimen loading device for treating test block (13) load, on test specimen loading device It is connected with data collection system;
The fixed device of external frame is equipped with second cross beam (11) and third crossbeam (11-1) detachable and be parallel to each other;
Test specimen loading device includes horizontal actuator (12), horizontal load sensor (14) and connecting rod (15), horizontal actuator (12) it is connect respectively with data collection system with horizontal load sensor (14), the left end and second cross beam (11) of horizontal actuator Be fixedly connected, right end is connect by the first connecting hinge (16) with the left end of test specimen to be measured (13), the right end of test specimen (13) to be measured and Horizontal load sensor (14) is fixedly connected, and horizontal load sensor (14) and connecting rod (15) relatively rotate and connect, connecting rod It is hinged by the second connecting hinge (16-1) and third crossbeam (11-1);
Horizontal actuator (12), test specimen to be measured (13), horizontal load sensor (14) and connecting rod (15) are coaxial and horizontal;
The fixed device of the external frame is equipped with the 4th crossbeam (11-2), and the setting of the 4th crossbeam (11-2) is upper solid equipped with test specimen Determine device, test piece fixing device for clamping test specimen to be measured (13), prevent test specimen to be measured during loading due to bias etc. because The outer unstability of plane occurs for element;
The test piece fixing device includes for clamping the sliding fixture of test specimen to be measured (13), two-way lead screw (22) and being fixed on Connecting plate (19) on four crossbeams is penetrated through on connecting plate (19) and is opened up swallowtail-shaped slide (19-1), swallowtail-shaped slide (19-1) It is vertical with the axis of test specimen to be measured (13) to open up direction;
Sliding fixture includes symmetrical left sliding fixture (20-1) and right sliding fixture (20-2), and the lower end of sliding fixture is and swallow The compatible sliding block of tail shape sliding slot (19-1) and setting is in the swallowtail-shaped slide (19-1), left sliding fixture (20-1) and right sliding Left push rod (21) and right push rod (21-1) are connected separately on fixture (20-2);
The both ends of two-way lead screw (22), which are respectively cooperating with, is provided with the first attaching nut (23) and the second attaching nut (23-1), and first Attaching nut (23) and the second attaching nut (23-1) connect with left push rod (21) and right push rod (21-1) respectively, double by rotating To lead screw (22), keep left sliding fixture (20-1) synchronous with right sliding fixture (20-2) towards or away from movement;
The sliding fixture is arranged at the middle part of test specimen to be measured (13), and sliding fixture center offers transversal with test specimen to be measured (13) Face is adapted the groove for clamping test specimen to be measured, and the axle center of groove and test specimen to be measured (13) are coaxial;
The groove is semi-circular recesses.
2. a kind of automatic control uniaxial force component Cyclic Loading loading device according to claim 1, which is characterized in that The right end of the horizontal load sensor (14) is equipped with internal screw thread, and the left end of connecting rod (15) is equipped with outer with the screw-internal thread fit Screw thread, horizontal load sensor (14) and connecting rod (15) are relatively rotated by internal and external screw thread and are connected.
3. a kind of automatic control uniaxial force component Cyclic Loading loading device according to claim 1, which is characterized in that The fixed device of the external frame includes i-shape steel beam cushion cap (5) arranged side by side, i-shape steel beam cushion cap (5) left and right sides Be connected separately with trapezoid horizontal reaction frame (1) and triangle reaction frame (8), the both ends of second cross beam (11) respectively with ladder side by side Shape horizontal reacting force frame (1) connection, the both ends of third crossbeam (11-1) are connect with triangle reaction frame (8) side by side respectively, I-shaped Column (3) are equipped between trapezoid horizontal reaction frame (1) and triangle reaction frame (8) on section steel beam cushion cap (5), ipsilateral column (3) it is connect between trapezoid horizontal reaction frame (1) by first crossbeam (6), first crossbeam (6) and i-shape steel beam cushion cap (5) Parallel and setting is connected with the 4th crossbeam (11-2) between column (3) side by side in the upper end of column (3).
4. a kind of automatic control uniaxial force component Cyclic Loading loading device according to claim 3, which is characterized in that The first crossbeam (6), second cross beam (11), third crossbeam (11-1), the 4th crossbeam (11-2) and column (3) are I-shaped Crossbeam, i-shape steel beam cushion cap (5), first crossbeam (6) and the wing plate of the 4th crossbeam (11-2) are setting up and down, second cross beam (11), the equal left and right settings of wing plate of third crossbeam (11-1) and column (3), both ends and column (3) of the 4th crossbeam (11-2) Web connection, the both ends of second cross beam (11) are connect with the web of the first column (1-1) on trapezoid horizontal reaction frame (1).
5. a kind of automatic control uniaxial force component Cyclic Loading loading device according to claim 3, which is characterized in that It is equipped in the trapezoid horizontal reaction frame (1) and prestressed prestressed cable (2) is applied to trapezoid horizontal reaction frame (1), answered in advance The upper end of power cable wire (2) is connect with the upper beam (1-2) of trapezoid horizontal reaction frame (1), and lower end and i-shape steel beam cushion cap (5) are even It connects.
6. a kind of automatic control uniaxial force component Cyclic Loading loading device according to claim 1, which is characterized in that The data collection system includes computer (25), hydraulic oil source (26), controller (29) and multichannel strain acquirement instrument (30), liquid Pressure oil source (26) is connected (12) by hydraulic oil pipe (27) with horizontal actuator, and the output end of controller (29) passes through quad (28) it is connected respectively with the control terminal of the control terminal of horizontal actuator (12) and hydraulic oil source (26), horizontal load sensor (14) output end is connected with the input terminal of multichannel strain acquirement instrument (30), the output end of multichannel strain acquirement instrument (30) It is connected with computer (25).
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