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Evidence of nonlinear site response in HVSR from SMART1 (Taiwan) data by P. Dimitriu; N. Theodulidis; P.-Y. Bard is a Engineering article available to read on EtoBox.
What is Evidence of nonlinear site response in HVSR from SMART1 (Taiwan) data about?
Deampli®cation of strong motion and the increase of the effective period of soil deposits are typical nonlinear effects; we seek them in SMART1-array data by applying the horizontal-to-vertical spectral ratio (HVSR) technique. The recordings, from four soil and one rock stations, represent 23 earthquakes (M L 4.9±7.0); PGA varies between 20±260 cm/s 2 . For each station, mean HVSR curves are calculated for two PGA ranges: ,75 cm/s 2 and .100 cm/s 2 (weak and strong motion). At the soil stations, the aweako (linear) and astrongo (nonlinear) responses are signi®cantly different. Below 1±1.8 Hz, the nonlinear response exceeds the linear one. Above 2 Hz, the nonlinear response drops below the linear one and above 4±6 Hz below unity (deampli®cation). From 10 to 16 Hz, the two responses converge. One soil site shows signi®cant negative correlation between resonance frequency and ground acceleration. Such behaviour agrees with other empirical studies and theoretical predictions. Our results imply that the HVSR technique is sensitive to ground-motion intensity and can be used to detect and study nonlinear site response.
Who reads Evidence of nonlinear site response in HVSR from SMART1 (Taiwan) data?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- P. Dimitriu; N. Theodulidis; P.-Y. Bard
- Publisher
- Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0267-7261)
- Published
- 2000
- Language
- EN
- Field
- Engineering (Physical Sciences)