Seismic Damage Analysis of Reinforced Concrete Frame Using the Force Analogy Method

AbstractTo meet the requirements of performance-based earthquake engineering, the influence of damage should be considered when conducting a structural performance assessment. In recent years, significant effort has gone toward developing accurate and efficient damage models for seismic damage analysis. In this paper, a framework for seismic damage analysis of RC frame structures considering stiffness degradation is established based on the force analogy method (FAM). A damaged hinge (DH) model, which is located at the ends of columns and beams, is proposed for modeling damage behavior owing to concrete cracking. The DH, together with the plastic hinge (PH), arising from structural materials and presented in prior research on the FAM, forms a complete inelastic mechanism including stiffness degradation behavior for RC frame structures. As damage effect is implemented by introducing the damage indexes as internal variables, the real-time structural performance and damage level can be evaluated during the c...

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