TY JOUR TI Analysis of the Modern Regulatory Framework for the Design of Reinforced Concrete Bridges Considering Environmental Impact KW reinforced concrete bridges KW regulatory framework KW durability KW service life design KW Service Life Design KW Life-Cycle Design KW carbonation KW chloride corrosion KW residual service life KW environmental efficiency KW AASHTO KW EN 206 KW JSCE KW GB 50010 KW AS 5100 KW sustainable design JO Proceedings of Petersburg Transport University AU Salihanov, S.S. AU Karapetov, E.S. PY 2026 IS 23 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"