A Study on Earthquake Resistant Design of RC Structures Considering Damage Level

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In this study, behavior of RC structures during strong earthquake is investigated in the viewpoint of energy response for the purpose of studying on seismic damage mechanism.1. To study on behavior of energy response of structures, single degree of freedom system with various natural period and yielding force is analyzed. Damaging potential of earthquakes to structures is estimated by total input energy and damage of RC structures is evaluated both by ductility factor and by dissipated hysteretic energy.2. Relation and difference of response behavior between one mass and RC frame with beam yield mechanism is studied, by equivalent single degree of freedom system of frame with assumption of elastic first mode. And response behavior of one mass and RC frame designed considering energy response is investigated. It is found that restoring force of one mass is almost equal tothe base shear of corresponding frame, and that ductility factor of one mass and ductility factor of beam are related well.3. By the results of study, an earthquake resistant design procedure considering damage level as design limit is proposed. By this procedure, necessary yield force of buildings can be estimated using input energy spectrum without earthquake response analysis.