MULTI-CHEMO PHYSICAL APPROACH TO LIFE-CYCLE PERFORMANCE OF STRUCTURAL CONCRETE AND SOIL FOUNDATION

摘要

Coupled analysis of mass transport and damage mechanics associated with steel corrosion and ASR is presented for structural performance assessment of reinforced concrete. Multi-scale modeling of micro-pore formation and transport phenomena of moisture and i-ons are mutually linked for predicting the corrosion of reinforcement and volumetric chan-ges. The interaction of crack propagation with corroded gel migration is simulated. Two computer codes for multi-chemo physical simulation (DuCOM) and nonlinear dynamic mechanics of structural concrete (COM3) were combined. This computational system was verified by the laboratory scale experiments of damaged reinforced concrete members under static loads, and has been applied to safety and serviceability assessment of existing bridges. The coupled system is extended to soil foundation-underground water-reinforced concrete interaction of mechanics and mass transport.