METHOD TO DETERMINE FIRE-RESISTANCE OF COMPRESSED REINFORCED CONCRETE BUILDING STRUCTURE MEMBERS

摘要

FIELD: fire safety of buildings and building structures.;SUBSTANCE: method involves performing nondestructive testing of compressed members of reinforced concrete building structure to determine single quality indexes and estimating the quality indexes by statistical control execution. To perform above method reinforced concrete structure dimensions, weak section heating pattern in case of fire, degree of compressed member concrete reinforcement, compressed member fastening conditions, as well as density, moisture content, concrete heat-conductivity, loads applied to reinforced concrete structure and rate of weak section strain in compressed members are determined. Fire-resistance rating of compressed members is determined from nomographic chart.;EFFECT: increased reliability and reduced costs.;13 cl, 1 dwg