Analytical procedure in aseismic design of eccentric structure using response spectrum

As the design response spectrum enveloping the response spectra derived from the actual earthquake waves generally gives conservative responses, it is utilized as safe and time-saving procedure for the seismic design. In this paper the responses are evaluated by the following two methods by the use of the typical torsional models in which masses, rigidities, eccentricities between the centers thereof and several actual earthquake waves are taken as the parameters; (1) the root mean square of responses by using the response spectra derived from the earthquake waves.(2) the time history analysis by using the earthquake waves. The earthquake waves used are chosen to present the different frequency content and magnitude of the response spectra. (Auth.)