Seismic displacement response spectrum estimated from the frame analogy soil amplification model

This paper describes the development of a simple and rational manual proced ure, termed the "frame analogy soil amplification" (FASA) model, which can be used to construct realistic seismic soil response spectra that account c ompletely for the effects of soil resonance. FASA is based on the analogy o f the dynamic response behaviour of a building to represent the dynamic beh aviour of a horizontally layered soil column, when subject to earthquake ex citations transmitted from bedrock. The theoretical foundation of FASA requ ires relatively few data for verification and calibration purposes. Thus, i t is particularly suited to applications in regions of low and moderate sei smicity where field data are typically limited. The procedure becomes even more powerful when its capability is extended to predict the response spect ral displacement (RSD). This paper presents (1) a summarised account of the conception and development of the FASA-RSD model, (2) a comparison of the model predictions with response spectra computed from shear wave analysis ( using the computer program SHAKE) and with response spectra recorded from t he 1989 Loma Prieta earthquake, and (3) the application of FASA including c ommentaries and an illustrative example. (C) 2001 Elsevier Science Ltd. All fights reserved.