CN204694465U - Rubber support is resistance to compression and shearing strength proving installation under compound stress - Google Patents

Abstract

The utility model discloses a device for testing the compressive and shear strength of a rubber support under a composite stress state. An upper base plate, a lower base plate, a rubber support to be tested and a jack are clamped by one end of the upper base plate and the lower base plate parallel to each other. For the rubber bearing, the other ends of the upper base plate and the lower base plate are fixed by a vertical baffle, the base of the jack is fixed on the baffle, and the top pressure part of the jack is horizontally facing the middle part of the rubber bearing, and is basically fixed Rubber bearing, the supporting force of the jack is provided by the baffle, and the rubber bearing is pressed against the jack, and the rubber bearing is deformed under the force, and the shear strength is calculated by the pressure applied by the jack and the displacement of the rubber bearing; to the test device The compressive strength test can be completed by applying the extrusion force in the vertical direction. The advantage is that multiple devices are integrated in one device, which occupies a small space; the support provided by the device itself replaces the reaction wall fixed on the ground, making the device Can be moved freely.

Description

Test device for compressive and shear strength of rubber bearing under composite stress state

technical field

The utility model relates to a test device, in particular to a test device for the compressive and shear strength of a rubber bearing under a compound stress state.

Background technique

At present, the medium and small-span bridges in my country generally adopt plate type or lead core rubber bearings. Under the impact load, temperature load and earthquake of the vehicle, the vertical and horizontal large deformation properties of the rubber bearings can reduce various types of bearings. The force of the load transmitted to the piers and pile foundations. In recent years, various types of damage to rubber bearings due to substandard compressive and shear strengths have frequently occurred, which has become one of the main factors affecting the normal operation of various bridges.

Rubber bearings are usually in a composite stress state under the action of pressure and shear force. The test of its compressive and shear strength is an important indicator to determine whether the rubber bearing is qualified. The compressive and shear strength of various rubber bearings at home and abroad The test mainly uses vertical and horizontal jacks, combined with the large-volume reinforced concrete reaction wall to carry out in the laboratory, which fixes the rubber bearing on the ground pedestal, through the vertical and horizontal jacks fixed on the reaction wall Load the rubber bearing, record its vertical pressure, horizontal shear force and deformation in all directions, and obtain the compressive and shear strength of the rubber bearing under the composite stress state. The traditional test method mainly has the following disadvantages: 1. It needs multiple large-volume loading equipment to be used together, which takes up a lot of laboratory space, and is not suitable for on-site review of rubber bearings at the construction site; 2. Various types of compressive and shear strength The tested equipment is fixed on the reaction wall and the ground of the laboratory, and the test space is limited, so it cannot be moved and replaced flexibly.

Utility model content

The technical problem to be solved by the utility model is to provide a simple device for testing the compressive and shearing strength of rubber bearings that occupy a small space and can be flexibly transported and replaced.

The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a detection device for the compressive and shear strength of the rubber bearing, which is characterized in that it includes an upper base plate, a lower base plate, a rubber bearing to be tested and a jack, which are parallel to each other. One end of the upper base plate and the lower base plate clamps the rubber support, the other end of the upper base plate and the lower base plate is fixed by a vertical baffle, the base of the jack is fixed on the baffle, and the top pressure part of the jack faces the rubber support horizontally the middle part.

A further preferred solution is: the rubber support is an upper rubber column and a lower rubber column, an upper connecting plate is arranged below the upper rubber column, a lower connecting plate is arranged above the lower rubber column, and the upper connecting plate and the lower connecting plate are fixedly connected. The top pressure portion of the jack bears against the junction of the upper connecting plate and the lower connecting plate. It can test the shear strength of two rubber columns at one time and improve the test efficiency.

A further preferred solution is: the centers of the upper rubber column and the lower rubber column are aligned. The alignment of the rubber columns can make the force of the rubber bearing more uniform, and the data obtained from the test are more accurate.

A further preferred solution is: the upper connecting plate and the lower connecting plate are fixedly connected by first screws. The screws can firmly fix the upper connecting plate and the lower connecting plate.

A further preferred solution is: a support component is provided below the jack. The support members keep the jack in a flat setting, less prone to bending due to gravity.

A further preferred solution is: the jack is provided with a sensor, and the sensor is connected to the controller. The sensor transmits the measured data to the controller, and the controller displays the measured data.

A further preferred solution is: the ends of the upper base plate and the lower base plate pass through the channel provided on the baffle, and the baffle is provided with a fixing device for fixing the upper base plate and the lower base plate. The upper base plate, the lower base plate and the baffle are fixedly connected, and the baffle provides the reaction force supporting the pressure of the jack.

A further preferred solution is: the rubber support is fixed between the upper base plate and the lower base plate by screws. The rubber support can be firmly fixed between the upper base plate and the lower base plate by the second screw.

Compared with the prior art, the utility model improves the traditional static loading test device of the vertical self-reflexive force frame so that it has the function of testing the shear strength. On the basis of cooperating with the common hydraulic universal testing machine, it can It has the test function of compressive strength and shear strength under composite stress state.

When it is necessary to test the shear strength of the rubber bearing under the composite force state, the rubber bearing is fixed by the upper base plate and the lower base plate. Turn on the hydraulic universal testing machine and apply vertical pressure. Then the horizontal support force of the jack is provided by the baffle, and the rubber bearing is loaded horizontally by the jack, and the rubber bearing produces shear deformation. The shear strength is calculated by the pressure applied by the jack and the displacement of the rubber bearing.

The utility model has the advantages of integrating the common hydraulic universal testing machine and horizontal jack and other loading equipment into one body, occupying a small space; the equipment itself provides horizontal support to replace the large-volume reinforced concrete reaction wall, so that the equipment can Flexible handling and replacement.

Description of drawings

Fig. 1 is the schematic diagram of the utility model;

Fig. 2 is a perspective view of the utility model.

Detailed ways

The utility model is described in further detail below in conjunction with the accompanying drawings.

The device for testing the compressive and shear strength of the rubber bearing under the combined stress state is characterized in that it includes an upper base plate 1, a lower base plate 2, a rubber bearing 3 to be tested and a jack 4, and the upper base plate 1 and the lower base plate are parallel to each other. One end of the substrate 2 clamps the rubber support 3, the other ends of the upper substrate 1 and the lower substrate 2 are fixed by a vertical baffle 5, the base 6 of the jack 4 is fixed on the baffle 5, and the top pressure part of the jack 4 7 is horizontally towards the middle part of the rubber bearing 3 . A hydraulic universal testing machine (not shown in the drawings) applies an upper extrusion force F1 and a lower extrusion force F2 in the vertical direction to the rubber bearing.

The rubber support 3 is an upper rubber column 8 and a lower rubber column 9. An upper connecting plate 10 is arranged below the upper rubber column 8, and a lower connecting plate 11 is arranged above the lower rubber column 9. The upper connecting plate 10 and the lower connecting plate 11 are fixedly connected. The pressing portion 7 of the jack 4 bears against the junction of the upper connecting plate 10 and the lower connecting plate 11 .

The centers of the upper rubber column 8 and the lower rubber column 9 are aligned. The upper connecting plate 10 and the lower connecting plate 11 are fixedly connected by first screws 12 . A support member 13 is provided below the jack 4 . The jack 4 is provided with a sensor (not shown in the figure), and the sensor is connected with the controller (not shown in the figure).

The ends of the upper base plate 1 and the lower base plate 2 pass through a channel (not shown in the drawings) provided on the baffle plate 5 , and the baffle plate 5 is provided with a fixing device 14 for fixing the upper base plate 1 and the lower base plate 2 . The rubber support 3 is fixed between the upper base plate 1 and the lower base plate 2 by the second screw 15 .

Above, the rubber bearing provided by the utility model has been introduced in detail under the combined stress state of the compressive and shear strength testing device. In this paper, specific examples have been used to illustrate the principle and implementation of the utility model. The above implementation The description of example is only used to help understand the utility model and core idea. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (8)

1. The device for testing the compressive and shear strength of the rubber bearing under the composite stress state, which is characterized in that it includes an upper base plate, a lower base plate, a rubber bearing to be tested and a jack, and one end of the upper base plate and the lower base plate are clamped parallel to each other. The other ends of the upper base plate and the lower base plate are fixed by a vertical baffle, the base of the jack is fixed on the baffle, and the pressing part of the jack is horizontally facing the middle part of the rubber support. 2. The device for testing the compressive and shear strength of the rubber bearing according to claim 1, wherein the rubber bearing is an upper rubber column and a lower rubber column, and the upper rubber column is arranged below the rubber bearing. There is an upper connecting plate, the lower connecting plate is arranged above the lower rubber column, the upper connecting plate and the lower connecting plate are fixedly connected, and the top pressure part of the jack withstands the junction of the upper connecting plate and the lower connecting plate. 3. The device for testing the compressive and shear strength of the rubber bearing under the combined stress state according to claim 2, characterized in that the centers of the upper rubber column and the lower rubber column are aligned. 4. The device for testing the compressive and shear strength of the rubber bearing under composite stress according to claim 2, characterized in that the upper connecting plate and the lower connecting plate are fixedly connected by first screws. 5. The device for testing the compressive and shearing strength of the rubber bearing under the composite stress state according to claim 1, characterized in that a support member is arranged below the jack. 6. The device for testing the compressive and shearing strength of the rubber bearing under composite stress according to claim 1, characterized in that the jack is provided with a sensor, and the sensor is connected to the controller. 7. The device for testing the compressive and shear strength of rubber bearings under composite stress conditions according to claim 1, characterized in that the ends of the upper base plate and the lower base plate pass through the channel provided on the baffle , the baffle is provided with a fixing device for fixing the upper base plate and the lower base plate. 8. The device for testing the compressive and shear strength of the rubber bearing under composite stress according to claim 1, characterized in that the rubber bearing is fixed between the upper base plate and the lower base plate by a second screw.