A damage-based approach for the performance-based seismic assessment of reinforced concrete frame structures is proposed. A new methodology for structural damage assessment is developed that utilizes response information at the material level in each section fiber. The concept of the damage evolution is analyzed at the section level and the computed damage is calibrated with observed experiment...

In order to study the influence of damage on gas production natural hydrate, a multi-physical field theoretical model considering effect and coupling thermal-hydraulic-mechanical-chemical (THMC) was established by analysis numerical simulation. The THMC establishes relationship between elastic modulus hydrate sediment saturation during whole process decomposition. THC (thermal-hydraulic-chemica...