hi, I am a new user in opensees, I am doing a finite element model to cantilever beam of reinforcement concrete, but the experimental results has high pinching, if I want to obtain pinching in the response, I should incorporate a rotational spring, but I do not have response M-teta,my question is: how calibrate spring rotational to obtain similar response experimental? any paper of calibrate beams RC? any recomendations to model?
thanks for your answer.
hinge beam RC
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