抄録
This paper proposes a direct identification method based on earthquake observation for an MDOF linear flexural-shear building model. The method identifies both shear and bending springs in the time domain by utilizing the horizontal responses at each lumped mass. The identification is conducted from the first story to the upper stories, and the last process is to evaluate the equivalent shear spring in the highest story. The advantage is to require neither iteration analysis nor ARX models nor frequency transmissibilities. Numerical examples indicate effects of damping matrices, a statically condensed stiffness matrix and noise in measurement.
