МЕТОДИКА ЭКСПЕРИМЕНТАЛЬНОГО ОПРЕДЕЛЕНИЯ ПАРАМЕТРОВ ЖИВУЧЕСТИ СБОРНО-МОНОЛИТНОГО ЖЕЛЕЗОБЕТОННОГО КАРКАСА

Abstract

The article presents a technique for carrying out experimental and numerical studies of reinforced concrete frame-fragments of a prefabricated monolithic reinforced concrete structural system of multi-storey buildings. The purpose of the research was to determine the nature of the change in the parameters of static-dynamic deformation and force resistance of the proposed structural system both at the stage of operation and during an emergency impact caused by the shutdown of one of the elements - the corner column of the first floor. To increase the resistance of the system under study to local or progressive collapse, new design solutions for the crossbars of the prefabricated monolithic frame are proposed, which make it possible to increase its resistance to a sudden change in power flows in the structural system under consideration. Analytical dependencies are proposed to determine the parameters of the intermedium contact zone in the prefabricated-monolithic structure of the crossbar. The solution of the problems under consideration was carried out using the LIRA-SAPR software package, taking into account material operation diagrams that take into account the static-dynamic nature of the loading of structures. The substantiation of the adopted design solutions for experimental designs of frame fragments for developing a program for conducting experimental studies of the structural system under consideration under special effects is given.