CN209841328U - Support device for drop hammer impact beam test - Google Patents

Abstract

A support device for a drop weight impact beam test. The impact of the supports on the span of the test beam, the deflection curve of the test impact beam and the failure process is reduced. It includes a support and a support top plate arranged on the support. The support is symmetrically arranged at the left and right ends of the support top plate. device, the fixing device includes a backing plate, a vertical bar, and a pressing plate, the backing plate is set on the top plate of the support, the pressing plate is arranged above the backing plate, the vertical bar runs through the backing plate and the pressing plate, and the backing plate, The pressing plate is detachably connected to the top plate of the support, and the pressing plate is provided with a locking device capable of locking the pressing plate on the vertical bar, and the relative position of the fixing device can be adjusted on the top plate of the support. The utility model has the advantage that the support can not reduce the accuracy of the drop weight impact beam test while ensuring the fixing effect on the beam.

Description

A support device for drop weight impact beam test

technical field

The utility model relates to the technical field of reinforced concrete component tests, in particular to a support device for a drop hammer impact beam test.

Background technique

The dynamic load test of reinforced concrete members is the basic method to study the stress characteristics and material properties of concrete members, and is widely used in the field of concrete. For concrete beams under concentrated loads, the impact load has a significant impact on the mechanical performance of the structure, directly determining the failure performance and failure state of the component. At the same time, because the impact test generally takes a short time, it is difficult to test the test deflection and failure process. Therefore, in the component test, impact test beam bearing vibration, span change and failure process test often become some important technical problems. In the same test condition, how to reduce the impact of the support on the ground, accurately change the span of the test beam, test the deflection curve of the impact beam and the failure process have an important impact on the test accuracy and test efficiency.

Utility model content

In order to solve the problems in the background technology, the utility model provides a support device for a drop weight impact beam test.

A support device for a drop weight impact beam test, comprising a support and a support top plate arranged on the support, the support is symmetrically arranged at the left and right ends of the support top plate, and the left and right ends of the support top plate are symmetrically arranged There is a fixing device for fixing the beam on the top plate of the support. The fixing device includes a backing plate, a vertical rod, and a pressing plate. The backing plate is arranged on the top plate of the support. It runs through the backing plate and the pressing plate, and detachably connects the backing plate and the pressing plate to the top plate of the support. The pressing plate is provided with a locking device that can lock the pressing plate on the vertical bar. Adjust the relative position up.

The top plate of the support is provided with a number of adjustment span holes adapted to the vertical bar, and the span adjustment holes are arranged in the length direction of the top plate of the support and are evenly distributed.

The locking device includes a locking handle, the locking handle is arranged on the front side of the pressing plate, and the front side of the pressing plate is provided with a threaded hole adapted to the locking handle, and the threaded hole passes through the pressing plate and communicates with the vertical bar.

A hinged support is fixedly connected to the backing plate, and the hinged support can rotate in the length direction of the support top plate.

The pressing plate is an isosceles triangle in cross section, and the included angle of the two waists faces downward.

The front side of the pressing plate is provided with a locking handle, and the front side of the pressing plate is provided with a threaded hole adapted to the locking handle, and the threaded hole runs through the pressing plate and communicates with the vertical bar.

The locking handle is "Z" shaped and has a ball at the tail end.

A laser range finder is provided under the top plate of the support, and a distance measuring hole is provided on the top plate of the support corresponding to the laser range finder, and the distance measuring hole is set at the center of the top plate of the support.

The bottom of the support is provided with a shock-absorbing rubber pad.

The support and the shock-absorbing rubber pad are connected to the ground through anchor rods.

The beneficial effects of the utility model are: the impact load test device for concrete specimens is more convenient to use and does not require complicated operations. The shock-absorbing rubber pad is connected to the ground anchor as a part of the whole, so as to maintain the stability and safety of the concrete specimen outside the plane and avoid lateral overturning. The deflection curve and failure process of the test beam are tested throughout the whole process through high-speed cameras and laser displacement sensors to improve the test performance. the accuracy.

Description of drawings

FIG. 1 is a structural schematic diagram of a support device for a drop weight impact beam test according to an embodiment of the present invention.

Fig. 2 is a front view of the support device of the drop weight impact beam test of the embodiment of the present invention.

Fig. 3 is a left view of the support device for the drop weight impact beam test of the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a fixing device according to an embodiment of the present invention.

Drawings: 1-support, 2-support top plate, 3-backing plate, 4-vertical rod, 5-pressure plate, 6-adjustment span hole, 7-hinge support, 8-locking handle, 9-distance measuring Holes, 10-shock-absorbing rubber pads.

Detailed ways

The embodiment of the utility model will be further described below in conjunction with the accompanying drawings.

A support device for a drop weight impact beam test, comprising a support 1, a support top plate 2 arranged on the support 1, the support 1 is symmetrically arranged at the left and right ends of the support top plate 2, and the support 1 The bottom is provided with a shock-absorbing rubber pad 10, and the support 1 and the shock-absorbing rubber pad 10 are connected to the ground through anchor rods, so as to maintain the stability of the concrete specimen outside the plane, avoid lateral overturning, and make the test more safe and reliable .

The left and right ends of the support top plate 2 are symmetrically provided with fixing devices for fixing the beam on the support top plate 2. The fixing device includes a backing plate 3, a vertical rod 4, and a pressing plate 5. The backing plate 3 is located on the support On the top plate 2, the pressing plate 5 is arranged above the backing plate 3, the vertical bar 4 runs through the backing plate 3 and the pressing plate 5, and the backing plate 3 and the pressing plate 5 are detachably connected to the support top plate 2, the pressing plate 5 The front side is provided with a locking handle 8, and the front side of the pressure plate 5 is provided with a threaded hole adapted to the locking handle 8. The threaded hole runs through the pressure plate 5 and communicates with the vertical bar 4. The support top plate 2 is provided with A number of adjustment span holes 6 adapted to the vertical bar 5, the adjustment span holes 6 are arranged on the length direction of the support top plate 2 and evenly distributed, the beam is prevented from being placed on the backing plate 3 and the pressure plate 5 is placed on the vertical bar 4 along the On the beam, the pressure plate 5 can be adjusted to a suitable position on the vertical rod 4 to be suitable for beams of different heights. The beam is fixed on the backing plate 3 through the pressure plate 5, and the locking handle 8 is connected to the vertical rod 4 through the pressure plate 5. The threaded holes contact to limit the displacement of the pressure plate 5 to lock the pressure plate 5 on the vertical rod 4, the vertical rod 4 assists the pressure plate 5 to prevent the beam from falling from the front and rear sides, and the vertical rod 4 and the adjustment span hole can be adjusted according to the test requirements The connection position of 6 makes it meet the span requirement of the test, and the vertical rod 4 is threadedly connected with the span adjustment hole 6.

The backing plate 3 is fixedly connected with a hinge support 7, and the hinge support 7 can rotate in the length direction of the support top plate 2. In the test, the beam placed horizontally will produce a certain degree of deformation after being impacted by the falling weight. The hinge support 7 can rotate according to the degree of bending and deformation of the beam, so as to reduce the impact of the backing plate 3 on the test accuracy.

The press plate 5 has an isosceles triangle in cross section, and the included angle of the two waists faces downwards. By reducing the contact area between the press plate 5 and the beam, the impact of the press plate 5 on the test accuracy when the beam is bent in the drop weight impact test is reduced.

Described locking handle 8 is " Z " shape, and be provided with ball at tail end, can be more relaxed when locking pressing plate 5, and tail end ball can prevent locking handle 8 from getting out of hand during locking process.

A laser rangefinder is provided below the support top plate 2, and a distance measuring hole 9 is provided at the place corresponding to the laser range finder on the support top plate 2. The distance measurement hole 9 is located at the center of the support top plate 2, and can To test the deflection time history curve of the test beam, a high-speed camera can be placed on the side of the beam to record the beam failure process during the impact test, so as to improve the accuracy of the test.

Notes to all technical personnel: Although the utility model has been described according to the above-mentioned specific embodiments, the inventive idea of the utility model is not limited to this utility model, and any modification using the inventive idea will be included in the protection scope of the patent right Inside.

Claims (9)

1. The utility model provides a experimental support device of impact beam that drops hammer, includes support (1), establishes support roof (2) on support (1), both ends, its characterized in that about support roof (2) are established to support (1) symmetry: support roof (2) left and right sides both ends symmetry is equipped with the fixing device who fixes the roof beam on support roof (2), fixing device includes backing plate (3), montant (4), clamp plate (5), establish on support roof (2) backing plate (3), establish in backing plate (3) top clamp plate (5), montant (4) run through backing plate (3) and clamp plate (5) to can dismantle backing plate (3), clamp plate (5) and connect on support roof (2), be equipped with on clamp plate (5) and lock the locking device of clamp plate locking on montant (4), fixing device can adjust relative position on support roof (2).

2. The pedestal device for drop hammer impact beam test according to claim 1, wherein: be equipped with adjustment span hole (6) of a plurality of adaptation montants (4) on support roof (2), establish in support roof (2) length direction and evenly distributed in adjustment span hole (6).

3. The pedestal device for drop hammer impact beam test according to claim 1, wherein: locking device includes locking handle (8), establish in clamp plate (5) front side locking handle (8), clamp plate (5) front side is equipped with the screw hole with locking handle (8) adaptation, the screw hole runs through clamp plate (5) and communicates with montant (4).

4. The pedestal device for drop hammer impact beam test according to claim 1, wherein: the base plate (3) is fixedly connected with a hinged support (7), and the hinged support (7) can rotate in the length direction of the support top plate (2).

5. The pedestal device for drop hammer impact beam test according to claim 1, wherein: the cross section of the pressing plate (5) is an isosceles triangle, and the included angle of the two waists faces downwards.

6. The holder device for the drop hammer impact beam test according to claim 3, wherein: the locking handle (8) is Z-shaped, and a ball is arranged at the tail end.

7. The pedestal device for drop hammer impact beam test according to claim 1, wherein: support roof (2) below is equipped with laser range finder, support roof (2) correspond laser range finder department and are equipped with range finding hole (9), range finding hole (9) are established and are put at support roof (2) central point.

8. The pedestal device for drop hammer impact beam test according to claim 1, wherein: and a damping rubber pad (10) is arranged at the bottom of the support (1).

9. The pedestal device for drop hammer impact beam test according to claim 8, wherein: the support (1) and the damping rubber pad (10) are connected with the ground through anchor rods.