CN212780317U - Loading device for bending and twisting test of structural member - Google Patents
Loading device for bending and twisting test of structural member Download PDFInfo
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- CN212780317U CN212780317U CN202021704783.9U CN202021704783U CN212780317U CN 212780317 U CN212780317 U CN 212780317U CN 202021704783 U CN202021704783 U CN 202021704783U CN 212780317 U CN212780317 U CN 212780317U
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Abstract
The utility model discloses a structural component bending test loading device, which comprises a base, wherein the base is fixed on the ground, a to-be-tested piece is vertically fixed on the upper part of the base, a pinion is horizontally and fixedly arranged at the upper end of the to-be-tested piece, and the rotating axis of the pinion is superposed with the axis of the to-be-tested piece; the large gear is horizontally arranged on the side edge of the small gear, is engaged with the small gear and is positioned on the same horizontal plane; the output end of the driving mechanism is connected with the large gear and is used for driving the large gear to horizontally rotate; the utility model utilizes the driving mechanism to drive the gear wheel to rotate horizontally, and drives the pinion fixed at the upper end of the test piece to be tested to rotate, thereby realizing the bending load test of the test piece to be tested; adopt gear revolve's horizontal tangential force to treat that the test piece applys bending torsion, effectively increased the torsion angle of waiting to test the piece through gear wheel pivoted pitch arc route, can be better satisfy to carry out the bending torsion test to the higher structural component of ductility, the experimental phenomenon is obvious, simple structure, convenient operation.
Description
Technical Field
The utility model belongs to the technical field of civil engineering is experimental, in particular to structural component bending test loading device.
Background
In actual engineering, the structural beams and the structural column frames bear all the loads of the structural main body and are main supporting members of the building structure; due to the influence of earthquake and other actions, the structural beams and the structural columns are often in various complex stress states such as compression, tension and bending, for example, corner columns of frame structures, overhead piers, power transmission towers and the like; therefore, the method has extremely important significance for the stress performance research under complex conditions.
With the development of science and technology, new structural forms appear in modern building structures, for example, novel structural beam column forms such as a steel tube concrete column, a hollow sandwich steel tube concrete column, a steel tube concrete special-shaped column or a corrugated steel web plate combined box beam and the like, so that the overall performance (strength, rigidity, ductility and the like) of a structural member is greatly improved; however, most of the existing structural test research equipment aims at the traditional reinforced concrete structural member; and novel structural component ductility performance compares traditional reinforced concrete structure performance and has promoted by a wide margin, and traditional connecting rod formula loading equipment is because the loading range is little, and the moment of torsion is short, and loading device occupation space is big and test piece installation complicacy scheduling problem has restricted the researcher to the further research of current novel structural component performance, influences architectural structure design's innovative development.
SUMMERY OF THE UTILITY MODEL
To the technical problem who exists among the prior art, the utility model provides a structural component bending test loading device to it is not enough at the experimental loading device loading scope of bending to solve to have now, and the test result is not obvious, the big technical problem of equipment occupation space.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides a structural member bending test loading device, which comprises a base, a big gear, a small gear and a driving mechanism; the base is fixed on the ground, the to-be-tested piece is vertically fixed on the upper part of the base, the pinion is horizontally and fixedly arranged at the upper end of the to-be-tested piece, and the rotating axis of the pinion is superposed with the axis of the to-be-tested piece; the large gear is horizontally arranged on the side edge of the small gear, is engaged with the small gear and is positioned on the same horizontal plane; the output end of the driving mechanism is connected with the large gear and is used for driving the large gear to horizontally rotate.
Further, the device also comprises an axial compression jack, wherein the axial compression jack is vertically arranged at the upper end of the pinion, and the end part of the axial compression jack is in close fit with the upper end surface of the pinion.
Furthermore, the end part of the axial compression jack is set to be a smooth hemispherical surface, the center of the upper end surface of the pinion is provided with a smooth concave cambered surface, and the smooth hemispherical surface at the top end part of the axial compression jack is tightly matched with the smooth concave cambered surface of the upper end surface of the pinion.
Further, the reaction wall is vertically arranged at the end part of the base; the driving mechanism adopts an electro-hydraulic servo actuator, the electro-hydraulic servo actuator is horizontally arranged between the reaction wall and the gear wheel, the fixed end of the electro-hydraulic servo actuator is fixedly installed on the reaction wall, and the clamping head of the electro-hydraulic servo actuator is rotatably connected with the gear wheel.
Furthermore, a fixed shaft hole is formed in the large gear; the fixed shaft hole vertically penetrates through the fixed shaft hole and is arranged by deviating from the center of the large gear; the fixed shaft hole is rotatably provided with a pin, and two ends of the pin are fixedly connected with clamping heads of the electro-hydraulic servo actuators.
Furthermore, the tooth diameter of the big gear is three times of that of the small gear; the upper surface of the large gear is provided with an actuator clamping division line, a bending and torsion alignment division line and a bending and torsion hysteresis alignment division line; the actuator clamping division line, the bending torsion alignment division line and the bending torsion hysteresis alignment division line are respectively superposed with the radius of the bull gear; the actuator clamping division line penetrates through the center of the fixed shaft hole, the included angle between the bending torsion alignment division line and the actuator clamping division line is 120 degrees, and the included angle between the bending torsion hysteresis alignment division line and the actuator clamping division line is 180 degrees.
Further, the large gear is fixedly arranged on the ground through a gear clamping mechanism; the gear clamping mechanism comprises two clamping triangular plates, a gear shaft and a triangular plate fixing bolt;
the two clamping triangular plates are arranged in parallel up and down, the gear shaft is vertically and rotatably arranged between the two clamping triangular plates, and the large gear is fixedly sleeved on the gear shaft; and three corners of the clamping triangular plate are respectively fixedly connected with the ground through triangular plate fixing bolts.
Further, the to-be-tested piece comprises a test piece body, an upper clamping plate and a lower clamping plate; the upper clamping plate and the lower clamping plate are arranged in parallel up and down, and the test piece body is vertically and fixedly arranged between the upper clamping plate and the lower clamping plate; the upper surface of the upper clamping plate is fixedly connected with the pinion, and the lower surface of the lower clamping plate is fixedly connected with the base.
Further, the test piece body is a structural beam or a structural column.
Furthermore, the device also comprises two base pressing beams which are arranged at two ends above the base in parallel, and two ends of each base pressing beam are fixedly connected with the ground through foundation bolts.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a structural component bending test loading device, which is connected with a pinion through a big gear in a meshing way, and when a driving mechanism is used for driving the big gear to horizontally rotate, the small gear fixed at the upper end of a test piece to be tested is driven to rotate, thereby realizing the bending test of the test piece to be tested; through the occlusion rotation between the big gear and the small gear, a straight path of a bending load test is converted into an arc path, the bending load range is effectively increased, and the rotating force required by the same rotating angle of the to-be-tested pieces is smaller; adopt gear revolve's horizontal tangential force to treat that the test piece applys bending torsion, effectively increased the torsion angle of waiting to test the piece through gear wheel pivoted pitch arc route, can be better satisfy to carry out the bending torsion test to the higher structural component of ductility, the experimental phenomenon is obvious, simple structure, convenient operation.
Furthermore, the axial pressure jack is arranged at the upper end of the pinion, and axial pressure is applied to the test piece to be tested through the axial pressure jack, so that the bending and twisting test of the test piece to be tested in a complex stress state is met, and the application range of the loading device is effectively enlarged.
Furthermore, the smooth sunken cambered surface is arranged at the center of the upper end surface of the pinion and is connected with the smooth hemispherical surface of the axial compression jack in a matched mode, so that slipping or eccentricity of a to-be-tested piece in a torsion process in a bending torsion test is effectively avoided, the accuracy of a test result is effectively improved, and the safety of the test process is ensured.
Furthermore, the electro-hydraulic servo actuator is adopted to drive the gear wheel to rotate, so that the purpose that the horizontal load is accurately applied to the gear wheel with the larger diameter is achieved, the effective transmission of power is ensured, the gear wheel can drive the pinion to rotate stably, and the accuracy of a test result is improved.
Furthermore, the pin is arranged in the fixed shaft hole in the large gear in a rotating mode, the pin is connected with the electro-hydraulic servo actuator, the electro-hydraulic servo actuator is guaranteed to be capable of driving the large gear to rotate horizontally and stably, and accuracy of test results is effectively improved.
Furthermore, the tooth diameter of the large gear is three times of that of the small gear, so that when the rotation angle of the large gear is 120 degrees, the small gear can rotate for a circle, the small gear is driven to enable the test piece to complete more sufficient torsion through rotation in a small range of the large gear, the torsion angle of the test piece to be tested is effectively increased, and the torsion range of the test piece is improved; the electro-hydraulic servo actuators are respectively arranged on the upper surface of the large gear to clamp the division lines, and the bending alignment division lines and the bending hysteresis alignment division lines are convenient to mount, align and correct equipment and a test piece.
Furthermore, the large gear is fixedly arranged on the ground by adopting a gear clamping mechanism, so that the large gear can horizontally and stably rotate in the loading process, and the stability and reliability of the loading process are improved; the adjusting of the mounting height of the large gear is realized by adjusting the position of the clamping triangular plate on the triangular plate fixing bolt, the large gear and the small gear are ensured to be kept horizontal, and the loading test of pieces to be tested in different sizes or models is met.
Furthermore, two base pressing beams are arranged at two ends of the base, bolt clamping holes are formed in two ends of each base pressing beam, and the base pressing beams are fixedly connected with the ground through foundation bolts, so that the bases can be fixed conveniently; for the structural member poured with the base, the base can be directly removed, and the structural member with the base is directly fixed on the ground by the base pressing beam for testing.
The utility model discloses a structural component bending test loading device, through changing traditional connecting rod formula bending loading device into gear drive loading mode, change the interlock rotation that original sharp route passes through between the gear into pitch arc route, increased the loading scope; through the occlusion rotation of the big and small gears, the rotating force required by the loading test piece to generate the same rotating angle is smaller, and the device has the advantages of wide application, sufficient loading range, small use space, convenience in installation and the like.
Drawings
Fig. 1 is a schematic view of the overall structure of a structural member bending test loading device according to the present invention;
FIG. 2 is a schematic view of a connection structure between a pinion and a test piece to be tested according to the present invention;
FIG. 3 is a schematic view of the gearwheel structure of the present invention;
fig. 4 is a schematic view of an assembly structure of the gear wheel and the gear clamping mechanism of the present invention.
The device comprises a base 1, a reaction wall 2, a gearwheel 3, a pinion 4, a gear clamping mechanism 5, an electro-hydraulic servo actuator 6, a base pressing beam 7, a piece to be tested 8 and a bolt guide groove 9, wherein the bolt guide groove is formed in the base; 11 base top plate, 12 base bottom plate and 13 stiffening ribs; 31, fixing the shaft hole, 32, clamping the division line by an actuator, 33, 34, bending, hysteretic and aligning the division line; the triangular plate is clamped by the clamp 51, the gear shaft 52 and the triangular plate fixing bolt 53; 81 specimen body, 82 upper clamp plate, 83 lower clamp plate.
Detailed Description
In order to make the technical problem solved by the present invention, technical solution and beneficial effect are more clearly understood, and the following specific embodiments are right for the present invention to proceed further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in the attached drawings 1-4, the utility model provides a structural member bending test loading device, which comprises a base 1, a counterforce wall 2, a big gear 3, a small gear 4, a gear clamping mechanism 5, a driving mechanism, two base pressure beams 7 and an axial pressure jack; the base 1 is fixedly arranged on the ground through two base pressing beams 7, a piece to be tested 8 is vertically fixed on the upper portion of the base 1, the pinion 4 is horizontally fixed at the upper end of the piece to be tested 8, the piece to be tested 8 and the pinion 4 are coaxially fixed, and the rotation axis of the pinion 4 is vertically superposed with the axis of the piece to be tested 8; the large gear 3 is fixedly arranged on the ground through a gear clamping mechanism 5, and the large gear 3 is horizontally arranged on the side edge of the small gear 4; the bull gear 3 is meshed with the pinion 4, and the bull gear and the pinion are positioned on the same horizontal plane; the reaction wall 2 is vertically fixed at the end part of the base 1, the driving mechanism is horizontally arranged between the reaction wall 2 and the big gear 3, the fixed section of the driving mechanism is fixedly connected with the reaction wall 2, the output end of the driving mechanism is connected with the big gear 3, and the big gear 3 can be driven to horizontally rotate by the driving mechanism; the shaft pressing jack is vertically arranged at the upper end of the pinion 4, and the end part of the shaft pressing jack is in close fit with the upper end surface of the pinion 4.
The base 1 comprises a base top plate 11, a base bottom plate 12 and a plurality of stiffening ribs 13, wherein the base top plate 11 and the base bottom plate 12 are horizontally arranged at intervals from top to bottom, and the stiffening ribs 13 are vertically and uniformly arranged between the base top plate 11 and the base bottom plate 12; preferably, the base top plate 11, the base bottom plate 12 and the stiffening ribs 13 are all made of profiled steel plates, the upper ends of the stiffening ribs 13 are welded and fixed with the base top plate 11, and the lower ends of the stiffening ribs 13 are welded and fixed with the base bottom plate 12; the base bottom plate 12 is fixedly arranged on the upper surface of the base pressing beam 7.
The two base pressing beams 7 are arranged at two ends above the base 1 in parallel, and two ends of the base pressing beams 7 are fixedly connected with the ground through foundation bolts; two bolt guide grooves 9 are arranged on the ground, the two bolt guide grooves 9 are horizontally arranged in parallel, and the distance between the two bolt guide grooves 9 is matched with the width of the base 1; the four foundation bolts are respectively arranged at four corners of the base 1; the base pressing beam 7 is perpendicular to the bolt guide groove 9, bolt clamping holes are formed in two ends of the base pressing beam 7, the bolt clamping holes of the base pressing beam 7 at the upper end of the foundation bolt are fixedly connected, and the lower end of the delivered bolt is fixed in the bolt guide groove 9; the two base pressing beams are arranged at the two ends of the base, the bolt clamping holes are formed in the two ends of the base pressing beams, and the base pressing beams are fixedly connected with the ground through foundation bolts, so that the base is fixed conveniently; for the structural member poured with the base, the base can be directly removed, and the structural member with the base is directly fixed on the ground by the base pressing beam for testing.
The driving mechanism adopts an electro-hydraulic servo actuator 6, the electro-hydraulic servo actuator 6 is horizontally arranged between the counterforce wall 2 and the large gear 3, the fixed end of the electro-hydraulic servo actuator 6 is fixedly arranged on the counterforce wall 2 through a bolt, the clamping head of the electro-hydraulic servo actuator 6 is rotatably connected with the large gear 3, and the output end of the electric servo actuator 6 is connected with the clamping head thereof through a universal hinge; the bull gear 3 is provided with a fixed shaft hole 31, and the fixed shaft hole 31 deviates from the center of the bull gear 3 and is arranged close to the circumferential side of the bull gear 3; the fixed shaft hole 31 is vertically communicated, a pin is rotatably arranged in the fixed shaft hole 31, and the upper end and the lower end of the pin are fixedly connected with a clamping head of the electro-hydraulic servo actuator 6; the fixed shaft hole is formed in the position, deviating from the axis, of the large gear 3, so that the force arm of the electro-hydraulic servo actuator during loading is effectively increased.
Because the electro-hydraulic servo actuator can only do telescopic motion in the horizontal direction within a certain range, the tooth diameter of the large gear 3 is three times that of the small gear 4, so that the small gear can rotate for a circle when the rotation angle of the large gear is 120 degrees, the purpose of bending and loading a test piece through the small-range telescopic motion of the electro-hydraulic servo actuator is achieved, and the bending and twisting phenomenon of the test piece is more sufficient as far as possible. .
The upper surface of the bull gear 3 is provided with an actuator clamping division line 32, a bending and torsion alignment division line 33 and a bending and torsion hysteresis alignment division line 34; the actuator clamping division line 32, the bending and torsion alignment division line 33 and the bending and torsion hysteresis alignment division line 34 are respectively superposed with the radius of the bull gear 3; the actuator clamping division line 32 penetrates through the center of the fixed shaft hole 31, the included angle between the bending torsion alignment division line 33 and the actuator clamping division line 32 is 120 degrees, and the included angle between the bending torsion hysteresis alignment division line 34 and the actuator clamping division line 32 is 180 degrees; the actuator clamping division line 32, the bending alignment division line 33 and the bending hysteresis alignment division line 34 are arranged on the upper surface of the large gear 3, so that the equipment and the test piece can be conveniently installed and aligned and corrected.
In the utility model, when the clockwise included angle between the bending torsion alignment division line 33 and the actuator clamping division line 32 is 120 degrees, and the clockwise included angle between the bending torsion hysteresis alignment division line 34 and the actuator clamping division line 32 is 180 degrees, a larger preset distance is extended by the electro-hydraulic servo actuator, the shrinkage of the electro-hydraulic servo actuator is utilized to apply bending moment loading, and the single-pull loading of the electro-hydraulic servo actuator is realized; when the anticlockwise included angle between the bending alignment division line 33 and the actuator clamping division line 32 is 120 degrees, and the anticlockwise included angle between the bending hysteresis alignment division line 34 and the actuator clamping division line 32 is 180 degrees, a symmetrical actuator clamping division line is arranged on the other side with the bending alignment division line as a symmetry axis, pin holes are formed, bending moment loading is applied by pushing of the electro-hydraulic servo actuator, and single pushing loading of the electro-hydraulic servo actuator is achieved.
The gear clamping mechanism 5 comprises two clamping triangular plates 51, a gear shaft 52 and a triangular plate fixing bolt 53; the two clamping triangular plates 51 are arranged in parallel up and down, gear shaft holes are formed in the clamping triangular plates 51, the gear shaft 52 is vertically and rotatably arranged between the two clamping triangular plates 51, and the upper end and the lower end of the gear shaft 52 are respectively and rotatably arranged in the gear shaft holes of the two clamping triangular plates 51; the gearwheel 3 is fixedly sleeved on the gear shaft 52, and the gearwheel 3 can horizontally rotate around the axis of the gear shaft 52; three corners of the clamping triangular plate 51 are fixedly connected with the ground through triangular plate fixing bolts 53; preferably, the clamping set square is made of the same thick steel plate; the triangular plate fixing bolts 53 are provided with external threads, the upper part and the lower part of each clamping triangular plate 51 are respectively fixed on the triangular plate fixing bolts through nuts, and the adjustment of the installation height of the large gear is realized by adjusting the positions of the clamping triangular plates on the triangular plate fixing bolts; the large gear is arranged on the gear clamping mechanism, so that the stability of the horizontal rotation process of the large gear and the accurate meshing with the small gear can be effectively guaranteed, and the accuracy of bending and twisting loading is realized.
The shaft pressing jack is vertically arranged at the upper end of the pinion 4, and the end part of the shaft pressing jack is in close fit with the upper end surface of the pinion 4; the end part of the axial compression jack is a smooth hemispherical surface, and the center of the upper end surface of the pinion 4 is provided with a smooth concave cambered surface; the smooth hemispherical surface at the top end part of the axial compression jack is tightly matched with the smooth groove cambered surface on the upper end surface of the pinion 4; the smooth concave cambered surface is arranged at the center of the upper end surface of the pinion and is matched and connected with the smooth hemispherical surface of the axial compression jack, so that slipping or eccentricity of the to-be-tested part in the torsion process in the bending and twisting test is effectively avoided, the vertical force application of the axial compression jack to the to-be-tested part is ensured, and the accuracy of the test result is ensured.
The to-be-tested piece 8 comprises a test piece body 81, an upper clamping plate 82 and a lower clamping plate 83, wherein the upper clamping plate 82 and the lower clamping plate 83 are arranged in parallel up and down, and the test piece body 81 is vertically arranged between the upper clamping plate 82 and the lower clamping plate 83; the upper end of the test piece body 81 is fixedly connected with the lower surface of the upper clamping plate 82, and the upper surface of the upper clamping plate 82 is fixedly connected with the pinion 4; preferably, a gear connecting plate is arranged between the pinion 4 and the upper clamping plate 82, and the gear connecting plate and the pinion are welded and fixed or adopt an integrated structure; the gear connecting plate is connected with the upper clamping plate 81 through bolts, a plurality of bolt holes are uniformly formed in the gear connecting plate and the upper clamping plate 81, and fixing bolts penetrate between the gear connecting plate and the upper clamping plate, so that the pinion 4 is effectively connected with the test piece body; the lower end of the test piece body 81 is fixedly connected with the upper surface of the lower clamping plate 83, and the lower surface of the lower clamping plate 83 is fixedly connected with the base 1; preferably, the test piece body 81 is a structural beam or a structural column, such as a conventional concrete beam column and a novel member with good ductility, and the novel member with good ductility is one of a steel tube concrete column, a hollow sandwich steel tube concrete column, a steel tube concrete special-shaped column and a corrugated steel web combined box girder; preferably, the upper clamp plate 81 and the lower clamp plate 83 are both made of steel plates.
The utility model provides a gear wheel, pinion and gear fixing mechanism are removable structure, can change the regulation according to the actual shape size of awaiting measuring piece and the experimental arm of force demand size of turn round.
Principle of operation
The utility model discloses a structural component bending and twisting test loading device, which takes the single-pull loading of an electro-hydraulic servo actuator as an example, when in use, the loading device is assembled as required, and a piece to be tested 8 is fixedly arranged on a base 1; when the unidirectional bending test is loaded, the electro-hydraulic servo actuator 6 extends out by the maximum distance, the electro-hydraulic servo actuator 6 and the large gear 3 clamped by the electro-hydraulic servo actuator 6 are adjusted, the bending on the large gear 3 is aligned to the tooth socket corresponding to the dividing line, the tooth tip of the small gear 4 is clamped into the tooth tip, the electro-hydraulic servo actuator 6 is started, the large gear 3 is driven to move in a unidirectional way clockwise by 120 degrees, the small gear 4 is driven to rotate horizontally by the large gear 3, and the unidirectional bending test loading of a test piece 8 to be tested is further realized;
when the bending torsion hysteresis test is loaded, the electro-hydraulic servo actuator 6 extends by a half of the maximum distance, the electro-hydraulic servo actuator 6 and the large gear 3 clamped by the electro-hydraulic servo actuator 6 are adjusted, the bending torsion hysteresis on the large gear 3 is aligned to the tooth grooves corresponding to the dividing lines, the tooth tips of the small gear 4 are clamped into the tooth tips, the electro-hydraulic servo actuator 6 is started, the large gear 3 is driven to move to the range of +/-60 degrees, the small gear 4 is driven to horizontally rotate through the large gear 3, and then the bending torsion hysteresis test loading of a test piece 8 to be tested is realized.
The utility model discloses a structural component bending test loading device, a piece to be tested is fixedly arranged between a base and a pinion, a gearwheel is fixedly arranged on the ground through a gear clamping mechanism, the gearwheel and the pinion are arranged on the same plane and arranged in parallel, and the gearwheel and the pinion are tightly meshed; one end of the electro-hydraulic servo actuator is fixed on the counterforce wall through a bolt, the other end of the electro-hydraulic servo actuator is fixed on the positions, far away from the axle center, of the two side surfaces of the large gear through pins, the large gear is clamped on a horizontal plane, and the electro-hydraulic servo actuator is rotationally connected with the large gear clamping device through the pins; the electro-hydraulic servo actuator is connected with the large gear, the large gear is pulled to rotate by the electro-hydraulic servo actuator, and the small gear fixed on the to-be-tested piece is driven to rotate through the meshing between the large gear and the small gear, so that the bending load of the to-be-tested piece is realized; the utility model applies bending torsion to the test piece by the horizontal tangential force of gear rotation; the torsion angle of the test piece is increased through the arc path of the rotation of the large gear, and compared with a traditional connecting rod type loading device, the torsion test research on components with good ductility, such as steel pipe components, can be carried out more fully. The utility model is matched with the axial compression jack to study the complex stress of the press-bending torsion, and the axial compression jack can prevent the conditions of slippage, eccentricity and the like in the torsion process of a component for studying the stress condition of the press-torsion through the concave arc surface on the top surface of the pinion and the hemispherical bulge on the top end of the jack; the utility model has the advantages of simple assembly and disassembly and convenient assembly and moving.
The utility model discloses a structural component bending test loading device, through adopting the meshing of gear wheel and pinion, realize treating the bending load of test piece, the loading range is great, the bending test phenomenon is obvious, test equipment occupation space is less, it is convenient to dismantle, the test process is simple; in the utility model, a base is arranged for improving the integrity and the assembly of the whole device, and the rigidity of the base is the same as that of the ground base which is fixed on the ground through a base fixing bolt and a base pressing beam; the upper end of the test piece body is fixedly connected with the pinion through an upper clamping plate, and the upper clamping plate is fixed with the pinion; the lower extreme of test piece body passes through lower part splint and base fixed connection, adopts the bolt fastening between lower part splint and the base roof.
The above embodiment is only one of the embodiments that can realize the technical solution of the present invention, and the scope of the present invention is not limited only by the embodiment, but also includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention.
Claims (10)
1. A structural member bending test loading device is characterized by comprising a base (1), a large gear (3), a small gear (4) and a driving mechanism; the base (1) is fixed on the ground, a piece to be tested (8) is vertically fixed on the upper part of the base (1), the pinion (4) is horizontally and fixedly arranged at the upper end of the piece to be tested (8), and the rotating axis of the pinion (4) is superposed with the axis of the piece to be tested (8); the large gear (3) is horizontally arranged on the side edge of the small gear (4), and the large gear (3) is meshed with the small gear (4) and is positioned on the same horizontal plane; the output end of the driving mechanism is connected with the large gear (3) and is used for driving the large gear (3) to horizontally rotate.
2. A structural member bending test loading apparatus according to claim 1, further comprising an axial compression jack vertically disposed at an upper end of the pinion (4), an end of the axial compression jack being fitted snugly into an upper end face of the pinion (4).
3. The structural member bending test loading device according to claim 2, wherein the end of the axial compression jack is provided with a smooth hemispherical surface, the center of the upper end surface of the pinion (4) is provided with a smooth concave cambered surface, and the smooth hemispherical surface at the top end of the axial compression jack is tightly matched with the smooth groove cambered surface on the upper end surface of the pinion (4).
4. The structural member bending test loading device according to claim 1, characterized by further comprising a reaction wall (2), wherein the reaction wall (2) is vertically arranged at the end of the base (1); the driving mechanism adopts an electro-hydraulic servo actuator (6), the electro-hydraulic servo actuator (6) is horizontally arranged between the reaction wall (2) and the gear wheel (3), the fixed end of the electro-hydraulic servo actuator (6) is fixedly arranged on the reaction wall (2), and the clamping head of the electro-hydraulic servo actuator (6) is rotatably connected with the gear wheel (3).
5. A structural member bending test loading unit according to claim 4, wherein the bull gear (3) is provided with a fixed shaft hole (31); the fixed shaft hole (31) vertically penetrates through the fixed shaft hole and is arranged by deviating from the center of the large gear (3); the fixed shaft hole (31) is provided with a pin in a rotating mode, and two ends of the pin are fixedly connected with clamping heads of the electro-hydraulic servo actuators (6).
6. A structural member bending test loading apparatus according to claim 5, wherein the tooth diameter of the bull gear (3) is three times the tooth diameter of the pinion gear (4); the upper surface of the big gear (3) is provided with an actuator clamping division line (32), a bending alignment division line (33) and a bending hysteresis alignment division line (34); the actuator clamping division line (32), the bending alignment division line (33) and the bending hysteresis alignment division line (34) are respectively superposed with the radius of the bull gear (3); the actuator clamping division line (32) penetrates through the center of the fixed shaft hole (31) to be arranged, the included angle between the bending torsion alignment division line (33) and the actuator clamping division line (32) is 120 degrees, and the included angle between the bending torsion hysteresis alignment division line (34) and the actuator clamping division line (32) is 180 degrees.
7. The structural member bending test loading device according to claim 1, wherein the gearwheel (3) is fixedly arranged on the ground through a gear clamping mechanism (5); the gear clamping mechanism (5) comprises two clamping triangular plates (51), a gear shaft (52) and a triangular plate fixing bolt (53);
the two clamping triangular plates (51) are arranged in parallel up and down, the gear shaft (52) is vertically and rotatably arranged between the two clamping triangular plates (51), and the large gear (3) is fixedly sleeved on the gear shaft (52); three corners of the clamping triangle (51) are respectively fixedly connected with the ground through triangle fixing bolts (53).
8. The structural member bending test loading device according to claim 1, wherein the test piece (8) to be tested comprises a test piece body (81), an upper clamping plate (82) and a lower clamping plate (83); the upper clamping plate (82) and the lower clamping plate (83) are arranged in parallel up and down, and the test piece body (81) is vertically and fixedly arranged between the upper clamping plate (82) and the lower clamping plate (83); the upper surface of the upper clamping plate (82) is fixedly connected with the pinion (4), and the lower surface of the lower clamping plate (83) is fixedly connected with the base (1).
9. The structural member bending test loading device according to claim 8, wherein the test piece body (81) is a structural beam or a structural column.
10. The structural member bending test loading device according to claim 1, further comprising two base pressing beams (7), wherein the two base pressing beams (7) are arranged at two ends above the base (1) in parallel, and two ends of each base pressing beam (7) are fixedly connected with the ground through foundation bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021704783.9U CN212780317U (en) | 2020-08-14 | 2020-08-14 | Loading device for bending and twisting test of structural member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021704783.9U CN212780317U (en) | 2020-08-14 | 2020-08-14 | Loading device for bending and twisting test of structural member |
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| Publication Number | Publication Date |
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| CN212780317U true CN212780317U (en) | 2021-03-23 |
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| CN202021704783.9U Active CN212780317U (en) | 2020-08-14 | 2020-08-14 | Loading device for bending and twisting test of structural member |
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| CN (1) | CN212780317U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115372170A (en) * | 2022-10-24 | 2022-11-22 | 西南石油大学 | Bending and twisting test device and method for steel-concrete suspension tunnel pipe joint with damaged outer pipe wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115372170A (en) * | 2022-10-24 | 2022-11-22 | 西南石油大学 | Bending and twisting test device and method for steel-concrete suspension tunnel pipe joint with damaged outer pipe wall |
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