TY JOUR TI Estimation of the load-bearing capacity of existing reinforced concrete structures by vibration method with determination of the neutral line position KW load-bearing capacity KW vibration method KW reinforced concrete structures KW defects JO Construction and Architecture AU Kovalev, F.E. AU Zarin, S.V. AU Seliverstov, N.A. PY 2025 IS 13 PB Publishing Center RIOR