RU85233U1 - BENCH FOR TESTING REINFORCED CONCRETE ELEMENTS FOR A SHORT DYNAMIC BENDING - Google Patents

Abstract

1. A test bench for testing reinforced concrete elements for a short-term dynamic bending, comprising a copying machine mounted on the power floor with a load ejector, the guides of which are equipped with a load limiter, supports for the reinforced concrete element, in the cutouts of which the rollers are installed, one of which is stationary, the second with the possibility of horizontal movement, loading traverse with a force meter mounted on it, installed through metal gaskets on a reinforced concrete element, characterized in that it additionally contains compliant supports installed between the supports of the reinforced concrete element and the power floor. ! 2. The stand according to claim 1, characterized in that the reinforced concrete element is placed on rollers through metal plates.

Description

The utility model relates to testing equipment, namely to machines for testing reinforced concrete samples with flexible supports for dynamic bending that occurs during short-term dynamic loading.

A technical solution is known for a test bench for testing reinforced concrete elements for short-term dynamic bending with compression (patent for PM No. 77434). The stand consists of a pile rig mounted on the power floor with a load ejector, supports for a reinforced concrete element, a loading beam with a force meter mounted on it and installed through metal gaskets on a reinforced concrete element, a reinforced concrete element placed on supports. In addition, the stand contains supports located on both sides of the machine, on which additional traverses are installed, interconnected by means of cords and a jack. The jack is located between the additional traverse and the metal ball, which abuts through the metal plate at the end of the reinforced concrete element. To obtain data, a set of standard measuring instruments is used.

This stand allows you to explore the parameters that characterize the stress-strain state of a reinforced concrete beam at the time of bending under the action of a short-term dynamic load with compression. However, the stand does not allow to study the work of a reinforced concrete beam in bending under the action of short-term dynamic load, taking into account the reactions of compliant supports.

A known bench for testing reinforced concrete elements for short-term dynamic bending, (patent on PM No. 77433). The stand consists of a pile-mounted machine mounted on a power floor with a load ejector, supports for a reinforced concrete element, a loading beam with a force meter mounted on it and installed through metal gaskets on a reinforced concrete element. The guides of the pile driver are equipped with a load limiter. Rollers are installed in the cutouts of the supports, one of which is stationary, the other with the possibility of horizontal movement. Accelerometers are installed on the load ejector, force meter. Strain gages are glued to the supports under the reinforced concrete element. To obtain data, standard measuring instruments are used.

This stand, adopted as a prototype of the claimed stand, allows you to sufficiently study the parameters that characterize the stress-strain state of a reinforced concrete beam at the time of bending under the action of short-term dynamic load. However, this stand does not allow to investigate the work of a reinforced concrete beam in bending under the action of short-term dynamic load, taking into account the reactions of compliant supports, which are used in building constructions under the conditions of anthropogenic conditions.

The objective of the utility model is to provide a bend for the reinforced concrete element under study, taking into account the work of compliant supports. The technical result, which the problem is aimed at, is to create a stress-strain state characterized by the action of a bending moment under short-term dynamic loading, and to measure the deformations of a reinforced concrete beam and ductile supports.

The problem is solved as follows.

Like the prototype, the utility model contains a copying unit mounted on the power floor with a load ejector, guides which are equipped with a load limiter, supports for the reinforced concrete element, in the cutouts of which the rollers are installed, one of which is stationary, the second with the possibility of horizontal movement, the loading beam with fixed on a force meter installed through metal gaskets on a reinforced concrete element. In contrast to the prototype, the stand additionally contains supple supports. The supports are installed between the supports for the reinforced concrete element and the power floor. The reinforced concrete element is mounted on rollers through metal plates.

The specified set of essential features characterizing the claimed utility model is not found among known sources of information, which confirms its novelty.

The utility model is illustrated in the drawing, which shows a General view of the inventive test bench.

The design of the stand is installed on the power floor 1, to ensure rigid fastening. It includes supports 2, guides 3 and load 4. Supports 2 are mounted on flexible supports 5, based on the power floor 1. The design scheme is a hinged beam. Experimental sample 6 (reinforced concrete beam) is mounted on supports 2, in the cutouts of which rollers are installed, one stationary, and the second with the possibility of horizontal movement. The load traverse 7, laid on the experimental sample 6 through metal plates, is rigidly attached to the load meter 8, which captures the value of the dynamic load. The pliable supports and the reinforced concrete element are connected by measuring devices (conventionally not shown in the drawing).

The operation of the device is as follows. The shock load is created by the mass of the falling load 4. The force of the impact can be varied by changing the mass of the load 4 and the height of the load. To obtain data on the stress-strain state of the experimental sample, taking into account the action of compliant supports and the compliant supports themselves, a set of standard measuring instruments is used. When the load 4 hits the reinforced concrete beam in the latter, a bending moment and displacement occurs, which is fixed at individual points of the reinforced concrete beam, which leads to deformation of the compliant supports 5. Data on the deformation of the reinforced concrete beam 6 and compliant supports 5 are recorded by measuring instruments. The dynamic load is fixed by the load meter 8.

Claims (2)

1. A test bench for testing reinforced concrete elements for a short-term dynamic bending, comprising a copying machine mounted on the power floor with a load ejector, the guides of which are equipped with a load limiter, supports for the reinforced concrete element, in the cutouts of which the rollers are installed, one of which is stationary, the second with the possibility of horizontal movement, loading traverse with a force meter mounted on it, installed through metal gaskets on a reinforced concrete element, characterized in that it additionally contains compliant supports installed between the supports of the reinforced concrete element and the power floor. 2. The stand according to claim 1, characterized in that the reinforced concrete element is placed on rollers through metal plates.