CN108806468B - Sliding beam type low-cycle repeated test device and operation method - Google Patents
Sliding beam type low-cycle repeated test device and operation method Download PDFInfo
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- CN108806468B CN108806468B CN201810573169.4A CN201810573169A CN108806468B CN 108806468 B CN108806468 B CN 108806468B CN 201810573169 A CN201810573169 A CN 201810573169A CN 108806468 B CN108806468 B CN 108806468B
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Abstract
The invention discloses a sliding beam type low-cycle repeated test device and an operation method, wherein the sliding beam type low-cycle repeated test device comprises a loading frame, a sliding beam, a slidable upper clamp, a slidable lower clamp, a vertical load loader, a vertical servo actuator, a transverse servo actuator, a counterforce wall, a base, an upper slideway, a lower slideway and an L-shaped fixed support; the loading frame is arranged on the base and is fixed through an L-shaped fixing support, and the loading frame is a frame shaped like a Chinese character 'men'; the sliding beam is transversely installed on the loading frame, the vertical load loader is installed on the sliding beam, the vertical servo actuator is installed on the vertical load loader, the lower end of the sliding beam is provided with an upper slideway, and the top end of the slidable upper clamp is clamped in a clamping groove of the upper slideway and slides left and right along the lower end of the sliding beam; the lower slideway is arranged on the upper part of the base, and the bottom end of the slidable lower clamp is clamped in a clamping groove of the lower slideway to slide left and right. The invention can ensure the horizontal displacement of the column top and can also be used for the damage evolution test of the column and the shear wall under the action of earthquake.
Description
Technical Field
The invention relates to a test device, in particular to a sliding beam type test device for low-cycle repeated tests.
Background
In order to research the damage evolution process of reinforced concrete beams and columns under the action of earthquake, a reinforced concrete low-cycle repeated loading test is a common test project in civil engineering teaching and research, and the development of the reinforced concrete low-cycle repeated loading test is helpful for restoring the earthquake load in actual engineering, so that the study of reinforced concrete walls and columns under the action of earthquake is more effectively carried out. However, the existing reinforced concrete low-cycle repeated loading test devices in colleges and universities are large in size, single in function, high in cost and large in occupied area. The reinforced concrete low-cycle repeated loading test is usually carried out on a reverse loading beam, a jack is used as a loading device, and a reverse wall is used for limiting horizontal displacement of a column end.
When the reinforced concrete low-cycle repeated loading test is carried out on the reverse loading beam, the reverse loading beam is fixed and cannot move, and the jack is in direct contact with the test piece in the low-cycle repeated loading test process of the test piece, so that the horizontal displacement of the column top is difficult to ensure, and the test result is influenced. The clamp moving range of the column top and the column bottom is small, and the test of damage evolution of the shear wall under the action of earthquake cannot be carried out.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a sliding beam type low-cycle repeated test device and an operation method, which can ensure the horizontal displacement of the top of a column and can simultaneously perform a test on the damage evolution of the column and a shear wall under the action of an earthquake.
The technical scheme adopted by the invention is as follows: a sliding beam type low-cycle repeated test device comprises a loading frame, a sliding beam, a slidable upper clamp, a slidable lower clamp, a vertical load loader, a vertical servo actuator, a transverse servo actuator, a counterforce wall, a base, an upper slideway, a lower slideway and an L-shaped fixed support;
the loading frame is arranged on the base and is fixed through an L-shaped fixing support, and the loading frame is a frame shaped like a Chinese character 'men';
the sliding beam is transversely arranged on the loading frame, a vertical load loader is arranged on the sliding beam, and a vertical servo actuator is arranged on the vertical load loader; the vertical load loader comprises a sliding beam bearing, rolling shafts, a load transfer bridge and a bearing outer wrapping layer, wherein the bearing outer wrapping layer is wrapped on the periphery of the sliding beam bearing, the sliding beam bearing freely rotates in the sliding beam bearing, the rolling shafts are distributed between the sliding beam bearing and the bearing outer wrapping layer, and the load transfer bridge penetrates through the vertical servo actuator and the bearing outer wrapping layer to transfer vertical loads; the sliding beam slides left and right on the sliding beam bearing and receives a transverse load transmitted by the transverse servo actuator, the transverse servo actuator is connected with a counterforce wall, the counterforce wall is used for supporting the transverse servo actuator to enable the transverse servo actuator to generate a load on the sliding beam, the sliding beam also receives a vertical load transmitted by the vertical servo actuator through a vertical load loader, and two ends of the sliding beam are provided with boundary plates;
the upper slide rail is arranged at the lower end of the slide beam and comprises an upper slide rail clamping groove and a slidable upper clamp used for fixing the top of a test piece, the upper slide rail clamping groove is sunken at the bottom of the slide beam, and the top end of the slidable upper clamp is clamped in the upper slide rail clamping groove and slides left and right along the lower end of the slide beam;
the lower slideway is arranged at the upper part of the base and comprises a lower slideway clamping groove and a slidable lower clamp used for fixing the bottom of the test piece, the lower slideway clamping groove is sunken on the base, and the bottom end of the slidable lower clamp is clamped in the lower slideway clamping groove to slide left and right;
the vertical servo actuator and the transverse servo actuator comprise piston rods, actuator cylinder bodies, actuator bases, oil holes and displacement sensors; the utility model discloses a test piece, including actuator cylinder body, hydraulic pump, piston rod, displacement sensor, test piece, actuator cylinder body, be equipped with the oilhole on the actuator base, the oil piping connection hydraulic pump and the actuator cylinder body that the oilhole leads to out, and the hydraulic power that the actuator cylinder body produced by the hydraulic pump gets into or takes out from the cylinder body, promotes the piston rod displacement to apply certain load to the test piece, displacement sensor establishes inside being connected with the piston rod at the actuator cylinder body, and the displacement of response and output piston rod, this displacement is.
As preferred, every 10cm of smooth roof beam bottom sets up an upper slide card hole, and upper slide card hole diameter is 2 cm's circular hole structure, every 10cm of slidable upper clamp sets up an upper clamp card hole, and upper clamp card hole is length 10cm, and both ends radius of curvature is the hole structure of 2 cm's semicircle, aligns back with upper slide card hole and upper clamp card hole according to test piece required dimension, inserts the fixed slidable upper clamp of bolt.
Preferably, the upper sliding clamp is further provided with an upper clamp transverse sliding groove, so that the upper sliding clamp can move back and forth on the upper clamp transverse sliding groove to control the back and forth size of the upper sliding clamp.
As preferred, every 10cm in bottom plate upper portion sets up a glide slope card hole, and glide slope card hole diameter is 2 cm's circular hole structure, every 10cm in the slidable lower anchor clamps outside sets up a lower anchor clamps card hole, and lower anchor clamps card hole is length 10cm, and both ends radius of curvature is the hole structure of 2 cm's semicircle, aligns back with glide slope card hole and lower anchor clamps card hole according to test piece required dimension, inserts bolt fastening slidable lower anchor clamps.
Preferably, the slidable lower clamp is further provided with a lower clamp transverse sliding groove, and the slidable lower clamp can move back and forth on the lower clamp transverse sliding groove so as to control the back and forth size of the slidable lower clamp.
Preferably, an O-shaped sealing ring is arranged between the piston rod and the actuator cylinder body, and the piston rod and the actuator cylinder body are connected and guaranteed to be sealed.
Preferably, a dustproof ring is further arranged between the piston rod and the actuator cylinder body to prevent other fine pollutants such as dust from entering the actuator cylinder body.
The operation method of the sliding beam type low-circumference trial and error device specifically comprises the following steps:
firstly, lifting the sliding beam to reach the height of a test piece which can be placed below the sliding beam;
adjusting a slidable lower clamp on the base and a slidable upper clamp on the sliding beam to a position where a test piece can be placed in the upper clamp;
placing the tested piece at a designated position on the base, putting down the sliding beam, adjusting the slidable upper clamp and the slidable lower clamp, and clamping the test piece into the clamps to ensure that the test piece does not slide relatively;
inserting the bolts into the corresponding pore channels, screwing the bolts, and fixing the test piece to a required position;
controlling a vertical servo actuator to increase vertical load, and applying a certain vertical load to the test piece to meet the test requirement;
and sixthly, controlling the transverse servo actuator, gradually increasing the horizontal load, observing and recording the damage state of the test piece, and reading synchronous data on a computer.
In the invention, the transverse servo actuator is connected with a computer, and can measure the loaded load, wherein the load is the load borne by the loaded test piece, and the loading height is the height of the test piece. In the invention, the upper clamp and the lower clamp, the sliding beam and the base clamping hole can be fixed by bolts to prevent relative sliding during loading.
The invention has the beneficial effects that:
compared with the common low-cycle repeated loading test device, the device and the method solve the defects that the counter-force loading beam is fixed and cannot move, and can apply horizontal load on the beam and transfer the horizontal load to the test piece by the beam so as to ensure the horizontal displacement of the top end of the test piece.
Secondly, the servo actuators are connected with a computer, and the applied load of the servo actuators can be accurately controlled, so that the load of the top end of the column is controlled.
And the connecting parts of the loading frame, the vertical load loader and the sliding beam are provided with bearings, so that when the sliding beam slides horizontally, no other interference factors except the load applied by the servo actuator can be ensured to the greatest extent.
Drawings
FIG. 1 is a schematic diagram of the general structure of the present invention;
FIG. 2 is a schematic view of a vertical load loader of the present invention;
FIG. 3 is a schematic view of the upper run of the present invention;
FIG. 4 is a schematic view of the glidepath of the present invention;
FIG. 5 is a schematic view of a vertical servo actuator and a lateral servo actuator of the present invention.
Description of reference numerals: 1, a loading frame; 2, a sliding beam; 3, a slidable upper clamp; 4, a slidable lower clamp; 5 a sliding beam bearing; 6, a vertical load loader; 7, a vertical servo actuator; 8, a transverse servo actuator; 9 a counterforce wall; 10 a base; 11 a boundary plate; 12, an upper slideway; 13, a lower slideway; a 14L-shaped fixed bracket; 15 a roller; 16 load transfer bridges; 17 bearing overwrap; 18 upper slideway clamping grooves; 19, clamping holes of the upper slide way; 20, clamping holes of the clamp; 21, arranging a transverse sliding chute of the clamp; 22 lower slideway slot; 23, clamping holes of the lower slide way; 24, clamping the lower clamp; 25, a transverse sliding groove of the lower clamp; 26 a piston rod; 27 an actuator cylinder; 28O-shaped sealing rings; 29 dust ring; 30 an actuator base; 31 oil holes; 32 displacement sensors.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1-5, a sliding beam type low-cycle trial and error device comprises a loading frame 1, a sliding beam 2, a slidable upper clamp 3, a slidable lower clamp 4, a vertical load loader 6, a vertical servo actuator 7, a transverse servo actuator 8, a counterforce wall 9, a base 10, an upper slideway 12, a lower slideway 13 and an L-shaped fixing support 14;
the loading frame 1 is arranged on the base 10 and fixed through the L-shaped fixing support 14, so that the loading frame 1 is stable in the test process, and the loading frame 1 is a frame shaped like a Chinese character 'men' and is used for fixing other structural positions and has a supporting function.
The sliding beam 2 is transversely installed on the loading frame 1, a vertical load loader 6 is installed on the sliding beam 2, a vertical servo actuator 7 is installed on the vertical load loader 6, the vertical load loader 6 comprises a sliding beam bearing 5, rolling shafts 15, a load transfer bridge 16 and a bearing outer cladding 17, the bearing outer cladding 17 wraps the periphery of the sliding beam bearing 5 to fix the bearing, the sliding beam bearing 5 freely rotates in the sliding beam bearing, the rolling shafts 15 are distributed between the sliding beam bearing 5 and the bearing outer cladding 17, and the load transfer bridge 16 penetrates through the vertical servo actuator 7 and the bearing outer cladding 17 and is used for transferring vertical loads; the sliding beam 2 slides left and right on the sliding beam bearing 5 and receives a transverse load transmitted by the transverse servo actuator 8, the transverse servo actuator 8 is connected with a counterforce wall 9, the counterforce wall 9 is used for supporting the transverse servo actuator 8 to generate a load on the sliding beam 2, the sliding beam 2 also receives a vertical load transmitted by the vertical servo actuator 7 through the vertical load loader 6, and the sliding beam bearing 5 ensures that the sliding beam 2 can still freely slide left and right during loading. The two ends of the sliding beam 2 are provided with boundary plates 11 to define the boundary of the sliding beam 2, i.e. the transverse sliding range, and the rolling shaft 15 is added with lubricating oil, so that the sliding beam bearing 5 can slide with the sliding beam 2 almost without friction, and the influence of the sliding friction on the test can be reduced.
The lower end of the sliding beam 2 is provided with an upper slide rail 12, the upper slide rail 12 comprises an upper slide rail clamping groove 18 and a slidable upper clamp 3, the upper slide rail clamping groove 18 is recessed at the bottom of the sliding beam 2, the top end of the slidable upper clamp 3 can be clamped in the upper slide rail clamping groove 18, the slidable upper clamp 3 is used for fixing the top of a test piece and slides left and right along the lower end of the sliding beam 2, and meanwhile, the width of a transverse clamp can be adjusted to adapt to test pieces of different sizes; every 10cm of smooth roof beam bottom sets up one and goes up slide card hole 19, goes up slide card hole 19 diameter and be 2 cm's circular hole structure, 3 every 10cm of slidable upper clamp sets up one and goes up anchor clamps card hole 20, goes up anchor clamps card hole 20 and be length 10cm, and both ends radius of curvature is the hole structure of 2 cm's semicircle, and after slide card hole 19 aligns with last anchor clamps card hole 20 according to test piece required dimension, insert the bolt and can fix slidable upper clamp 3, and slidable upper clamp 3 still is equipped with anchor clamps horizontal chute 21, makes slidable upper clamp 3 can be moved around on last anchor clamps horizontal chute 21 to control slidable upper clamp 3's front and back size.
The lower slide 13 is arranged on the upper part of the base 10 and comprises a lower slide clamping groove 22 and a slidable lower clamp 4, the slidable lower clamp 4 is used for fixing the bottom of the test piece, the lower slide clamping groove 22 is sunken on the base 10, the bottom end of the slidable lower clamp 4 is clamped in the lower slide clamping groove 22 to slide left and right, and meanwhile, the width of the transverse clamp can be adjusted to adapt to test pieces with different sizes. Every 10cm on bottom plate 10 upper portion sets up a glide slope card hole 23, and glide slope card hole 23 diameter is 2 cm's circular hole structure, every 10cm in the 4 outsides of anchor clamps outside of slidable lower anchor clamps sets up a lower anchor clamps card hole 24, and lower anchor clamps card hole 24 is length 10cm, and both ends radius of curvature is the hole structure of 2 cm's semicircle, aligns the back with glide slope card hole 23 and lower anchor clamps card hole 24 according to test piece required dimension, inserts the bolt and can fix slidable lower anchor clamps 4, and slidable lower anchor clamps 4 still is equipped with down anchor clamps horizontal chute 25, and slidable lower anchor clamps 4 can be in the horizontal chute 25 of lower anchor clamps activity from beginning to end to control slidable lower anchor clamps 4 size from beginning to end.
The vertical servo actuator 7 and the transverse servo actuator 8 comprise piston rods 26, actuator cylinder bodies 27, O-shaped sealing rings 28, dust-proof rings 29, actuator bases 30, oil holes 31 and displacement sensors 32;
the actuator cylinder body 27 is installed on the actuator base 30, and the last oilhole 31 that is equipped with of actuator base 30, the oil pipe that oilhole 31 leads to out connect hydraulic pump and actuator cylinder body 27, and the hydraulic power that actuator cylinder body 27 produced by the hydraulic pump gets into or takes out the cylinder body, promotes the displacement of piston rod 26 to apply certain load to the test piece, displacement sensor 32 establishes and is connected with piston rod 26 inside the actuator cylinder body 27, and the response is exported the displacement of piston rod 26, and this displacement is the actual displacement of test piece promptly in the experiment.
An O-ring 28 is provided between the piston rod 26 and the actuator cylinder 27 to connect and secure the piston rod 26 and the actuator cylinder 27. A dust ring 29 is also provided between the piston rod 26 and the actuator cylinder 27 to prevent dust and other fine contaminants from entering the actuator cylinder 27.
The operation method of the sliding beam type low-circumference trial and error device specifically comprises the following steps:
firstly, lifting the sliding beam 2 to reach the height of a test piece which can be placed below the sliding beam;
adjusting a slidable lower clamp 4 on the base 10 and a slidable upper clamp 3 on the sliding beam 2 to positions where a test piece can be placed;
placing the tested piece on a specified position on the base 10, putting down the sliding beam 2, adjusting the slidable upper clamp 3 and the slidable lower clamp 4, clamping the test piece into the clamps, and ensuring that the test piece does not slide relatively;
inserting the bolts into the corresponding pore channels, screwing the bolts, and fixing the test piece to a required position;
controlling the vertical servo actuator 7 to increase the vertical load, and applying a certain vertical load to the test piece to meet the test requirement;
and sixthly, controlling the transverse servo actuator 8, gradually increasing the horizontal load, observing and recording the damage state of the test piece, and reading synchronous data on a computer.
It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention. All the components not specified in the present embodiment can be realized by the prior art.
Claims (6)
1. The utility model provides a low week trial and error device of sliding beam formula which characterized in that: the device comprises a loading frame, a sliding beam, a slidable upper clamp, a slidable lower clamp, a vertical load loader, a vertical servo actuator, a transverse servo actuator, a counterforce wall, a base, an upper slideway, a lower slideway and an L-shaped fixed support;
the loading frame is arranged on the base and is fixed through an L-shaped fixing support, and the loading frame is a frame shaped like a Chinese character 'men';
the sliding beam is transversely arranged on the loading frame, a vertical load loader is arranged on the sliding beam, and a vertical servo actuator is arranged on the vertical load loader; the vertical load loader comprises a sliding beam bearing, rolling shafts, a load transfer bridge and a bearing outer cladding layer, wherein the bearing outer cladding layer wraps the periphery of the sliding beam bearing, the sliding beam bearing freely rotates in the sliding beam bearing, the rolling shafts are distributed between the sliding beam bearing and the bearing outer cladding layer, and the load transfer bridge penetrates through the vertical servo actuator and the bearing outer cladding layer; the sliding beam slides left and right on the sliding beam bearing and receives a transverse load transmitted by the transverse servo actuator, the transverse servo actuator is connected with a counterforce wall, the counterforce wall is used for supporting the transverse servo actuator to enable the transverse servo actuator to generate a load on the sliding beam, the sliding beam also receives a vertical load transmitted by the vertical servo actuator through a vertical load loader, and two ends of the sliding beam are provided with boundary plates;
the upper slide rail is arranged at the lower end of the slide beam and comprises an upper slide rail clamping groove and a slidable upper clamp used for fixing the top of a test piece, the upper slide rail clamping groove is sunken at the bottom of the slide beam, and the top end of the slidable upper clamp is clamped in the upper slide rail clamping groove and slides left and right along the lower end of the slide beam;
the lower slideway is arranged at the upper part of the base and comprises a lower slideway clamping groove and a slidable lower clamp used for fixing the bottom of the test piece, the lower slideway clamping groove is sunken on the base, and the bottom end of the slidable lower clamp is clamped in the lower slideway clamping groove to slide left and right;
the vertical servo actuator and the transverse servo actuator comprise piston rods, actuator cylinder bodies, actuator bases, oil holes and displacement sensors; the actuator cylinder body is arranged on the actuator base, an oil hole is formed in the actuator base, an oil pipe communicated with the oil hole is connected with the hydraulic pump and the actuator cylinder body, the actuator cylinder body pushes the piston rod to move, the displacement sensor is arranged inside the actuator cylinder body and connected with the piston rod, and the displacement sensor senses and outputs the displacement of the piston rod;
the slidable upper clamp is also provided with an upper clamp transverse sliding groove, so that the slidable upper clamp can move back and forth on the upper clamp transverse sliding groove;
the slidable lower clamp is further provided with a lower clamp transverse sliding groove, and the slidable lower clamp moves back and forth on the lower clamp transverse sliding groove.
2. A skid-type low-cycle trial and error apparatus as set forth in claim 1, wherein: every 10cm in sliding beam bottom sets up a last slide card hole, goes up the circular hole structure that slide card hole diameter is 2cm, every 10cm of slidable formula top grip sets up an anchor clamps card hole, goes up the anchor clamps card hole and be length 10cm, and both ends radius of curvature is the hole structure of 2 cm's semicircle, will go up the slide card hole and align the back with last anchor clamps card hole, inserts the fixed slidable formula top grip of bolt.
3. A skid-type low-cycle trial and error apparatus as set forth in claim 1, wherein: every 10cm on base upper portion sets up a glide slope card hole, and glide slope card hole diameter is 2 cm's circular hole structure, every 10cm in the anchor clamps outside sets up a lower anchor clamps card hole under the slidingtype, and lower anchor clamps card hole is length 10cm, and both ends radius of curvature is the hole structure of 2 cm's semicircle, aligns the back with glide slope card hole and lower anchor clamps card hole, inserts the fixed slidingtype lower anchor clamps of bolt.
4. A skid-type low-cycle trial and error apparatus as set forth in claim 1, wherein: and an O-shaped sealing ring is arranged between the piston rod and the actuator cylinder body.
5. A skid-type low-cycle trial and error apparatus as set forth in claim 1, wherein: and a dustproof ring is also arranged between the piston rod and the actuator cylinder body.
6. The method of operating a skid-type low-cycle trial and error apparatus as claimed in claim 1, 2, 3, 4 or 5, wherein: the method specifically comprises the following steps:
firstly, lifting the sliding beam to reach the height of a test piece which can be placed below the sliding beam;
adjusting a slidable lower clamp on the base and a slidable upper clamp on the sliding beam to a position where a test piece can be placed in the upper clamp;
placing the tested piece at a designated position on the base, putting down the sliding beam, adjusting the slidable upper clamp and the slidable lower clamp, and clamping the test piece into the clamps to ensure that the test piece does not slide relatively;
inserting the bolts into the corresponding pore channels, screwing the bolts, and fixing the test piece to a required position;
controlling a vertical servo actuator to increase vertical load, and applying a certain vertical load to the test piece to meet the test requirement;
and sixthly, controlling the transverse servo actuator, gradually increasing the horizontal load, observing and recording the damage state of the test piece, and reading synchronous data on a computer.
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| CN201810573169.4A CN108806468B (en) | 2018-06-06 | 2018-06-06 | Sliding beam type low-cycle repeated test device and operation method |
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| CN201810573169.4A CN108806468B (en) | 2018-06-06 | 2018-06-06 | Sliding beam type low-cycle repeated test device and operation method |
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| CN109443936B (en) * | 2018-12-10 | 2020-09-22 | 西南交通大学 | Mesh top breaking and stretching integrated self-balancing experimental device and method |
| CN110361254B (en) * | 2019-08-27 | 2022-02-18 | 内蒙古工业大学 | Corrosion environment repeated load coupling device |
| CN112365787B (en) * | 2020-11-09 | 2022-04-01 | 张前进 | Assembled bridge design model |
| CN113567274B (en) * | 2021-07-21 | 2023-07-04 | 同济大学 | Single-side loading type large-sized compression shear bending composite loading test device and application thereof |
| CN114354341A (en) * | 2021-12-30 | 2022-04-15 | 内蒙古工业大学 | Continuous beam hogging moment area chlorine salt environment holding experimental device and method |
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| CN104792561A (en) * | 2015-04-23 | 2015-07-22 | 中南大学 | Low-frequency cyclic loading test device |
| CN204694576U (en) * | 2015-06-05 | 2015-10-07 | 宿迁学院 | A kind of framed structure multiple spot reversed loading device |
| CN105258890A (en) * | 2015-11-20 | 2016-01-20 | 天津大学 | Device for testing anti-seismic performance of shear wall under tension, bending and shear composite action |
| US10718699B2 (en) * | 2016-01-28 | 2020-07-21 | William B. Coe | Rolling cyclic fatigue test platform for determining asphalt ductility |
| CN205975713U (en) * | 2016-08-17 | 2017-02-22 | 山东省建筑科学研究院 | Vertical loading device suitable for indoor pile foundation model test |
| CN206556833U (en) * | 2017-02-26 | 2017-10-13 | 西南交通大学 | A kind of lower constant axial force loading device of low cycling loads effect |
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