STAND FOR TESTING CONCRETE ELEMENTS FOR bending moment, longitudinal and lateral forces in short-term dynamic loading

摘要

Stand for testing of concrete elements on action of bending moments and shear forces in the short-term dynamic loading can be used in impact tests compressed in the longitudinal direction of the sample. On the floor of the power plant with installed ramming gruzosbrasyvatelem and support for a reinforced concrete element. Hoisting mast installation are provided with stroke limiter load. On concrete elements installed boot traverse with fixed on it siloizmeritelej. On siloizmeritelej and gruzosbrasyvatele mounted accelerometers. On both sides of ramming installation on supports additional traverses installed. Girders are interconnected by strands. For concrete longitudinal compression element is a spring assembly which is mounted at one end between the concrete element and the additional cross member. Compression springs by means of a tension device and controlled displacement sensor attached to the spring block. The compressive load is transmitted to the beam by means of spherical elements abutting against the metal plate mounted on the ends of the concrete element. The quantity of support reactions is determined from the readings of strain gauges glued to the supports under the reinforced concrete element. The stand is equipped with a system of insurance to limit the deflection of reinforced concrete elements. The technical result is the creation of stress-deformed state characterized by a bending moment and transverse constant in magnitude longitudinal compressive force by brief dynamic loading. 1 NC 4 and ZP f ly-3-yl.