Open AccessEXPERIMENTAL STUDY OF SHORT STEEL CONCRETE COLUMNS ON STATIC INFLUENCES
Author(s) -
Mohammad Tahran Hammoud,
Ruslan Pcholkin
Publication year - 2021
Publication title -
zbìrnik naukovih pracʹ ukraïnsʹkoï deržavnoï akademìï zalìzničnogo transportu/zbìrnik naukovih pracʹ
Language(s) - English
Resource type - Journals
eISSN - 2413-3795
pISSN - 1994-7852
DOI - 10.18664/1994-7852.194.2020.230039
Subject(s) - structural engineering , welding , materials science , composite material , engineering
The paper considers the issues of planning an experimental tests of samples of short reinforced concrete supports for static effects. The procedure for determining the required number of samples and their preparation for testing is given. To determine the needed amount of supports the Latin square is used. The variable parameters for such type of construction are the followed: concrete class, the thickness of the expanded-exhaust sheet, the size of the cell of the average exhaust sheet, geometric parameters of the support (diameter and height), diameter and pitch of frame and the degree of adhesion of concrete to metal. Experimental samples are presented in three series: round concrete supports(6 pcs.), concrete supports in a mesh holder (6 pcs.) and concrete supports in a mesh holder supported by outer frames (6 pcs.). The height of each support is about 1000mm, the diameter is 450 mm. Based on the presented methodology, 18 prototypes were prepared for testing, which were made on the construction site of "Avantazh" ICC. For convenience of production of supports concreting is executed in a disposable cardboard framework. The diameter of the mesh holder is 400 mm, thus, the protective layer of concrete is 25 mm. The connection of the holder is made by butt welding without overlays. The frames are made of Ø12A400C reinforcement bars of periodic profile. Before conducting a series of experimental studies, standard tests of structural materials were performed, in particular, determination of the cubic strength of concrete. Simultaneously with the testing of standard samples of cubes, the establishment of the actual concrete classes of the test samples was performed using a non destructive test with the ONYX-2.5 device. Together with determining the concrete classes, geometrical characteristics of samples were defined. A P-500 hydraulic press for testing of building structures is used as the main power plant. The loading of the samples is planned to be realized stepwise through two headers in the form of steel disks till the moment of distruction.