Mohebimoghaddam B. Stress-strain state of statically indefinable two- span reinforced concrete beams by long sulphate solutions influence and short-term loading

The scientific work is devoted to studying of stress-strain state of bending reinforced concrete elements after long three- sided sulphate solutions influence, and also studying of efforts distribution by short-term loading after solutions influence . The experimental researches are executed on statically indefinable two-span reinforced concrete beams with rectangular cross-sections, kept in 5% water solution of nutria sulphate, influencing on laterals and bottom surfaces by short- term influence of external loading. The longitudinal reinforcement is accepted from steel class A-III. The theoretical researches are carried out bending stiffness in sections without and with cracks, and serviceability limit with account of features of long three- sided sulphate solutions influence, also for designing of deflections in statically indefinable two-span reinforced concrete beams