CN112067219A - Beam end movable hinge test device for anti-seismic test and test method thereof - Google Patents
Beam end movable hinge test device for anti-seismic test and test method thereof Download PDFInfo
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- CN112067219A CN112067219A CN202010894492.9A CN202010894492A CN112067219A CN 112067219 A CN112067219 A CN 112067219A CN 202010894492 A CN202010894492 A CN 202010894492A CN 112067219 A CN112067219 A CN 112067219A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
Abstract
The invention discloses a beam end movable hinge joint test device for an anti-seismic test, which belongs to the technical field of mechanical equipment and comprises a beam end and a pressure sensor, wherein the beam end is arranged on a rotating end, the bottom of the rotating end is inserted into a sliding end which is symmetrically arranged, the pressure sensor is positioned between the sliding end and a fixed column, the sliding end is arranged on the fixed column through a split screw for fixing, and after matching, the sliding end and the fixed column form a clamping effect on the pressure sensor. The invention also discloses a test method thereof. The invention realizes the restraint of the movable hinged support to the upper and lower movement directions of the beam end, and meets the requirement of an anti-seismic test; the pre-tightening force of the four fixing counter-pulling screw rods is applied, so that the measurement of the upward load of the beam is realized; through the conversion of the wide beam top plate and the assembling lugs, the method for connecting beams with different sizes is realized without changing the sizes of other equipment.
Description
Technical Field
The invention belongs to the technical field of mechanical equipment, and particularly relates to a beam end movable hinge test device for an anti-seismic test and a test method thereof.
Background
The movable hinged support is a basic node constraint form in structural mechanics, and particularly relates to simulation of beam end constraint in a structural test. As with the frame node shown in fig. 1, the simulation of a beam-column node often takes the form of fig. 2, with the constraints and loads shown in fig. 3. Fig. 4 shows a node reaction diagram of the test piece, and the reaction forces at two ends are seen to have two opposite directions of upward and downward. The traditional movable hinged support is provided with two rollers directly under a beam, as shown in the attached figure 5, and the method has the following problems:
(1) easy to fall off, and has safety risk;
(2) no upward restraint can be provided, only a downward restraint can be provided, and the test shown in fig. 4 cannot be performed;
(3) further, the magnitude of the upward reaction force cannot be measured.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a beam end movable hinge test device for an anti-seismic test, which realizes the restraint of a movable hinge support on the upper and lower movement directions of a beam end and meets the requirements of the anti-seismic test. Another object of the present invention is to provide a test method thereof.
The technical scheme is as follows: in order to achieve the purpose, the invention provides the following technical scheme:
the beam end is arranged on a rotating end, the bottom of the rotating end is inserted into sliding ends which are symmetrically arranged, the pressure sensor is located between the sliding end and a fixed column, the sliding end is arranged on the fixed column through a pulling joint of a split screw for fixing, and after the sliding end and the fixed column are matched, the pressure sensor is clamped by the sliding end and the fixed column.
Furthermore, the rotating end comprises an upper rotating end section and a lower rotating end section, the upper rotating end section and the lower rotating end section are rotatably connected through a roller shaft, and two ends of the lower rotating end section are inserted into the sliding ends.
Furthermore, two rows of pulleys are arranged in the sliding end, two ends of the lower section of the rotating end are inserted between the two rows of pulleys on the corresponding side, and the pulleys are connected with the sliding end through sliding end screw rods respectively.
Further, the upper section of the rotating end comprises a panel, a first lug plate and a panel stiffening rib; the panel is provided with a panel round hole for the connecting beam to pass through by a counter-pull screw; the first lug plate is provided with a first lug plate round hole for the roller shaft to pass through and rotate; the panel stiffener is connected to the panel by a fillet weld and the first ear plate.
Furthermore, the lower section of the rotating end comprises a bottom plate and a second lug plate, and round holes for the roller shaft to pass through and rotate are formed in the lug plates.
Furthermore, four top plate holes for penetrating through a counter-pulling screw rod for fixing are reserved on the tops of the fixing columns, wherein the top plates of the wide beam fixing columns are welded on the tops of the fixing columns.
Furthermore, the beam end comprises a wide beam and a wide beam top plate, and the wide beam top plate is fixed on the wide beam through a connecting beam by using a split screw. The wide beam top plate is a steel rectangular plate, and four wide beam top plate round holes for penetrating through the coupling beams by using counter-pulling screw rods are formed in the upper part of the wide beam top plate.
Furthermore, the beam ends comprise narrow beams and assembling lugs, and the assembling lugs are connected to the web plates of the narrow beams through narrow beam bolts.
Furthermore, the assembling lugs comprise flat plates, vertical plates and upper and lower vertical plate stiffening ribs, screw holes are formed in the vertical plates and used for penetrating through the narrow beam bolts to be connected to the web plates of the narrow beams, and flat plate holes are formed in the flat plates and used for penetrating through the split assembling lug bolts.
Further, the test method of the beam end movable hinge joint test device for the anti-seismic test comprises the following steps:
1) installation process
Placing a pressure sensor on the fixed column, placing a sliding end on the pressure sensor, inserting a rotating end into the sliding end, and adjusting the height of the bottom surface of the pressure sensor to enable the upper section of the rotating end to be tightly attached to the bottom surface of the beam end; installing and fixing a counter-pulling screw rod, connecting a sliding end with a fixing column and preliminarily clamping the pressure sensor;
for the assembly of the wide beam, after the position of the rotating end is adjusted and centered, the top plate of the wide beam, the wide beam and the rotating end are connected and fastened through a pull screw rod; for narrow beam splicing, after the position of a rotating end is adjusted and centered, the splicing lugs are connected with a web plate of the narrow beam by using narrow beam bolts, and then the splicing lugs are connected to the rotating end by pulling the splicing lug bolts;
2) debugging process
Connecting the pressure sensor to a measuring computer, and zeroing an initial measured value; applying pretightening force to the fixing counter-pulling screw rods, wherein each fixing counter-pulling screw rod is the same, observing the measurement value of the pressure sensor to enable the resultant force of the pretightening force to reach an expected value F, and finishing the pretightening force application and debugging;
3) calculation process
Setting the external force of the beam end to the test device as F, and taking the upward direction as the positive direction; the resultant force of the fixing counter-pulling screw rods is F, and the direction is downward; the pressure sensor has a reading of F, which represents the force direction being positive upwards; then according to the principle of equilibrium:
F+F＝F (I)
if the total rigidity of the fixing counter-pulling screw is K, the deformation is delta, and the rigidity of the pressure sensor is K, then the method has the following steps according to Hooke's law:
F＝F+KΔ (II)
Δ＝F/K (III)
then there are:
F＝F+F(K/K) (IV)
the relationship between the beam-end reaction force F brought into (I) and the pressure sensor reading F is:
f + F (K/K-) (V) may then be calculated from the pressure sensor reading change according to equation (V) to obtain the change in beam-end reaction force.
Has the advantages that: compared with the prior art, the beam end movable hinge test device for the anti-seismic test realizes the restraint of the movable hinge support to the upper and lower movement directions of the beam end, and meets the requirements of the anti-seismic test; according to the test method, the pre-tightening force of the four fixing counter-pulling screws is applied, so that the measurement of the upward load of the beam is realized; through the conversion of the wide beam top plate and the assembling lugs, the method for connecting beams with different sizes is realized without changing the sizes of other equipment.
Drawings
FIG. 1 is a graph of the force distribution within a frame structure;
FIG. 2 is a graph of the internal force distribution of a beam-column node test model;
FIG. 3 is a beam-column joint test constraint requirement;
FIG. 4 is a schematic diagram of the reaction force of the beam-column joint test;
FIG. 5 is a schematic view of a conventional live hinge support construction;
FIG. 6 is a schematic diagram of a wide beam assembly;
FIG. 7 is a composition of the rotating end;
FIG. 8 is a narrow beam assembly;
FIG. 9 illustrates a method of connecting the mounting ears to the device;
FIG. 10 is a wide beam top plate construction;
FIG. 11 is a view of the upper section of the rotating end;
FIG. 12 is a view showing the structure of the lower section of the rotation end;
FIG. 13 is a stationary post configuration view;
FIG. 14 is a view of a construction of a split lug;
reference numerals: 1-wide beam, 2-wide beam top plate, 3-rotating end, 4-roller shaft, 5-sliding end, 6-pressure sensor, 7-fixed column, 8-split screw for connecting beam, 9-split screw for fixing, 10-narrow beam, 11-rotating end upper section, 12-rotating end lower section, 13-pulley, 14-sliding end screw, 15-assembling lug, 16-assembling lug bolt, 17-wide beam top plate round hole, 18-panel, 19-first lug plate, 20-panel stiffening rib, 21-panel round hole, 22-first lug plate round hole, 23-bottom plate, 24-second lug plate, 25-second lug plate round hole, 26-fixed column top plate, 27-top plate hole, 28-flat plate, 29-vertical plate, 30-vertical plate stiffening ribs, 31-screw holes, 32-narrow beam bolts and 33-flat plate holes.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments.
As shown in fig. 1 to 14, a beam end movable hinge joint test device for an anti-seismic test comprises a beam end and a pressure sensor 6, wherein the beam end is arranged on a rotating end 3, the bottom of the rotating end 3 is inserted into sliding ends 5 which are symmetrically arranged, the pressure sensor 6 is arranged between the sliding ends 5 and a fixed column 7, the sliding ends 5 are arranged on the fixed column 7 through four oppositely pulling screw rods 9 for fixing in a pulling mode, and after the sliding ends 5 and the fixed column 7 are matched with each other, the pressure sensor 6 is clamped by the sliding ends 5 and the fixed column 7.
The beam ends are divided into a spliced configuration for wide beams 1 and narrow beams 10.
As shown in fig. 6, the splicing form for the wide beam 1 is composed of a wide beam top plate 2, a rotating end 3, a roll shaft 4, a sliding end 5 and a pressure sensor 6. The four connecting beams pass through holes preset on the wide beam top plate 2 by using counter-pulling screws 8 to clamp the wide beam top plate 2; as shown in fig. 7, the rotating end 3 comprises an upper rotating end segment 11 and a lower rotating end segment 12 which are connected by a roller shaft 4 and can rotate around the roller shaft; the bottom plate of the lower section 12 of the rotating end is inserted into the upper and lower rows of pulleys 13 of the sliding end 5, and the pulleys 13 are connected with the sliding end 5 through a screw 14 of the sliding end; the pressure sensor 6 is located between the sliding end 5 and the fixed column 7, and is used for measuring the change of the pressing force between the sliding end 5 and the fixed column 7.
As shown in fig. 8, the assembled form for the narrow beam 10 is composed of a pair of assembling lugs 15, a rotating end 3, a roll shaft 4, a sliding end 5 and a pressure sensor 6. As shown in fig. 9, the splicing ears 15 are connected to the web of the narrow beam 10 by four narrow beam bolts 32; the assembling lugs 15 are connected to the rotating end 3 through four split assembling lug bolts 16, so that the upward counter force of the narrow beam 10 is transmitted to the rotating end 3 through the assembling lugs 15, and the downward counter force is transmitted through the direct contact of the narrow beam 10 and the rotating end 3; other components and the force transmission mode are the same as the assembly form of the wide beam 1.
The wide beam top plate 2 is a steel rectangular plate, and as shown in the attached drawing 10, the upper part of the wide beam top plate is provided with four wide beam top plate round holes 17 for the connecting beam to pass through by the opposite-pulling screw rods 8.
The rotating end upper section 11 is made of steel material, as shown in fig. 11, in which fig. 11(a) is a front view, fig. 11(b) is a side view, and fig. 11(c) is a top view, and includes a panel 18, a first lug 19, and a panel stiffener 20; a panel round hole 21 for the connecting beam to pass through by the opposite-pulling screw 8 is formed on the panel 18; the first lug plate 19 is provided with a first lug plate round hole 22 for the roller shaft 4 to pass through and rotate; the panel stiffener 20 is connected to the panel 18 by a fillet weld and the first ear plate 19 to stiffen both. The roll shaft 4 is made of hard high-strength steel to manufacture round steel, and lubricating butter is coated on the round steel.
The lower rotating end segment 12 is made of steel, as shown in fig. 12, wherein fig. 12(a) is a front view, and fig. 12(b) is a side view, and includes a bottom plate 23 and a second ear plate 24, and the ear plate is provided with a circular hole 25 for the roller shaft 4 to pass through and rotate.
The fixing column 7 is made of steel, a wide beam fixing column top plate 26 is welded on the top of the fixing column, and four top plate holes 27 for the fixing split screws 9 to pass through are reserved, as shown in fig. 13.
The assembling lug 15 is made of steel and comprises a flat plate 28, a vertical plate 29 and upper and lower vertical plate stiffening ribs 30, wherein the vertical plate 29 is provided with a screw hole 31 for passing through a narrow beam bolt 32 to be connected to a web plate of the narrow beam 10, and the flat plate 28 is provided with a flat plate hole 33 for passing through a split assembling lug bolt 16, as shown in figure 14.
A beam end movable hinge joint test device for an anti-seismic test comprises an installation process, a pretightening force applying and debugging process and a test operation process in the using process; the installation process is as follows:
(1) placing the pressure sensor 6 on the fixing column 7;
(2) placing the sliding end 5 on the pressure sensor 6;
(3) inserting the rotating end 3 into the sliding end 5;
(4) the bottom surface height of the pressure sensor 6 is adjusted by the way of a lower cushion steel plate and the like, so that the panel 18 of the upper section 11 of the rotating end is tightly attached to the bottom surface of the wide beam 1 or the narrow beam 10;
(5) installing and fixing a counter-pulling screw rod 9, connecting the sliding end 5 with the fixed column 7 and preliminarily clamping the pressure sensor;
(6) for the assembly of the wide beam 1, after the position of the rotating end 3 is adjusted and centered, the wide beam top plate 2, the wide beam 1 and the rotating end 3 are connected and fastened through a pull screw 8;
(7) for the narrow beam 10 splicing, after the position of the rotating end 3 is adjusted and centered, the splicing lugs 15 are connected with the web plate of the narrow beam 10 by using narrow beam bolts 32, and then the splicing lugs 15 are connected to the rotating end 3 by using pulling and splicing lug bolts 16.
The pre-tightening force applying and debugging process comprises the following steps:
(1) checking whether the pressure sensor 6 and the sliding end 5 are tightly connected with the fixed column 7;
(2) connecting the pressure sensor 6 to a measuring computer, and zeroing an initial measured value;
(3) applying pretightening force to the tension screw rods 9 for fixing by using a torque wrench, observing the measured value of the pressure sensor 6 to enable the resultant force of the pretightening force to reach an expected value F0And the pre-tightening force application and debugging are completed.
The test operation process comprises the following steps:
(1) the upper rotating end section 11 and the lower rotating end section 12 can rotate around the roll shaft 4, so that the purpose of providing rotational freedom degree for the beam end is achieved;
(2) the rotating end 3 can slide in the sliding end 5, so that the aim of providing horizontal translation freedom degree for the beam end is fulfilled;
(3) the fixing device is pulled by the opposite-pulling screw rod 9, so that the purpose of providing vertical up-and-down constraint for the beam end is achieved.
Setting the external force of the beam end to the test device as F, and taking the upward direction as the positive direction; the resultant force of the fixing counter-pulling screws 9 is F1The direction is downward; the pressure sensor 6 has a reading F2Which represents the force direction being positive upwards; then according to the principle of equilibrium:
F2+F＝F1 (I)
the total rigidity of the opposite-pulling screw 9 for fixing is set to be K1Deformation is Delta and stiffness of the pressure sensor is K2Then, according to hooke's law:
F1＝F0+K1Δ (II)
Δ＝F2/K2 (III)
then there are:
F1＝F0+F2(K1/K2) (IV)
the reaction force to the beam end F brought in (I) and the pressure sensor reading F2The relationship of (1) is:
F＝F0+F2(K1/K2-1) (V)
and then the change of the beam-end reaction force can be calculated from the change of the reading of the pressure sensor according to the formula (V).
Claims (10)
1. The utility model provides a beam-ends activity hinge joint test device for shock resistance test which characterized in that: including beam-ends and pressure sensor (6), the beam-ends set up on rotation end (3), the bottom of rotation end (3) insert in the slip end (5) that the symmetry set up, pressure sensor (6) be located between slip end (5) and fixed column (7), slip end (5) through fixed with to drawing screw rod (9) drawknot setting on fixed column (7), after the cooperation, slip end (5) and fixed column (7) form the clamping action to pressure sensor (6).
2. The beam end movable hinge joint test device for the earthquake-proof test according to claim 1, wherein: the rotating end (3) comprises a rotating end upper section (11) and a rotating end lower section (12), the rotating end upper section (11) and the rotating end lower section (12) are rotatably connected through a roller shaft (4), and two ends of the rotating end lower section (12) are inserted into the sliding end (5).
3. The beam end movable hinge joint test device for the earthquake-proof test according to claim 2, wherein: two rows of pulleys (13) are arranged in each sliding end (5), two ends of the lower section (12) of each rotating end are inserted between the two rows of pulleys (13) on the corresponding side, and the pulleys (13) are connected with the sliding ends (5) through sliding end screw rods (14) respectively.
4. The beam end movable hinge joint test device for the earthquake-proof test according to claim 2, wherein: the upper rotating end section (11) comprises a panel (18), a first lug plate (19) and a panel stiffening rib (20); a panel round hole (21) for the connecting beam to pass through by the opposite-pulling screw rod 8 is formed on the panel (18); the first lug plate (19) is provided with a first lug plate round hole (22) through which the roll shaft (4) passes and rotates; the panel stiffener 20 is connected to the panel 18 by a fillet weld and a first ear plate 19.
5. The beam end movable hinge joint test device for the earthquake-proof test according to claim 2, wherein: the lower section (12) of the rotating end comprises a bottom plate (23) and a second lug plate (24), and a round hole (25) for the roller shaft (4) to pass through and rotate is formed in the lug plate.
6. The beam end movable hinge joint test device for the earthquake-proof test according to claim 1, wherein: and a wide beam fixed column top plate (26) is welded at the top of the fixed column (7) and four top plate holes (27) for the opposite-pulling screw rods (9) to pass through are reserved.
7. The beam end movable hinge joint test device for the earthquake-proof test according to claim 1, wherein: the beam end comprises a wide beam (1) and a wide beam top plate (2), and the wide beam top plate (2) is fixed on the wide beam (1) through a connecting beam and a split screw 8.
8. The beam end movable hinge joint test device for the earthquake-proof test according to claim 1, wherein: the beam end comprises a narrow beam (10) and assembling lugs (15), and the assembling lugs (15) are connected to a web plate of the narrow beam (10) through narrow beam bolts (32).
9. The beam end movable hinge joint test device for the earthquake-proof test according to claim 8, wherein: the assembling lugs (15) comprise flat plates (28), vertical plates (29) and upper and lower vertical plate stiffening ribs (30), screw holes 31 are formed in the vertical plates (29), and flat plate holes 33 are formed in the flat plates (28).
10. The test method of the beam end movable hinge test device for the earthquake resistance test according to any one of claims 1 to 9 is characterized by comprising the following steps:
1) installation process
Placing a pressure sensor (6) on a fixed column (7), placing a sliding end (5) on the pressure sensor, inserting a rotating end (3) into the sliding end (5), and adjusting the height of the pressure sensor (6); installing and fixing a counter-pulling screw rod (9), connecting the sliding end (5) with the fixing column (7) and preliminarily clamping the pressure sensor (6);
2) debugging process
Connecting the pressure sensor (6) to a measuring computer and zeroing the initial measured value; applying pretightening force to the oppositely pulling screw rods (9) for fixing, wherein each oppositely pulling screw rod (9) for fixing is the same, observing the measurement value of the pressure sensor (6) to ensure that the resultant pretightening force reaches the expected value F0The pre-tightening force application and debugging are completed;
3) calculation process
Setting the external force of the beam end to the test device as F, and taking the upward direction as the positive direction; the resultant force of the fixing counter-pulling screw rods (9) is F1The direction is downward; the pressure sensor (6) has a reading F2Which represents the force direction being positive upwards; then according to the principle of equilibrium:
F2+F＝F1 (I)
the total rigidity of the opposite-pulling screw rod (9) for fixing is set to be K1Deformation is Delta and stiffness of the pressure sensor is K2Then, according to hooke's law:
F1＝F0+K1Δ (II)
Δ＝F2/K2 (III)
then there are:
F1＝F0+F2(K1/K2) (IV)
the reaction force to the beam end F brought in (I) and the pressure sensor reading F2The relationship of (1) is:
F＝F0+F2(K1/K2-1) (V)
and then the change of the beam-end reaction force can be calculated from the change of the reading of the pressure sensor according to the formula (V).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010894492.9A CN112067219B (en) | 2020-08-31 | 2020-08-31 | Beam end movable hinge joint test device for anti-seismic test and test method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010894492.9A CN112067219B (en) | 2020-08-31 | 2020-08-31 | Beam end movable hinge joint test device for anti-seismic test and test method thereof |
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| CN112067219B CN112067219B (en) | 2022-06-28 |
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Cited By (1)
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| CN114279667A (en) * | 2022-03-07 | 2022-04-05 | 成都理工大学 | Pseudo-static anti-seismic test device and method for wallboard joint |
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| US11714025B1 (en) | 2022-03-07 | 2023-08-01 | Chengdu University Of Technology | Pseudo-static test device and method for seismic behavior of connection joints of wallboard |
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| Publication number | Publication date |
|---|---|
| CN112067219B (en) | 2022-06-28 |
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