Soil structure interaction

About: Soil structure interaction is a research topic. Over the lifetime, 3653 publications have been published within this topic receiving 48890 citations.

Soil-structure interaction during the San Fernando earthquake

Abstract: Accelerograms obtained at two sites during the San Fernando earthquake of 1971 were analyzed to investigate the role of soil-structure interaction, using techniques developed by Bielak and others. Analysis of the data from the site of the Hollywood Storage Building, for which data from the Arvin-Tehachapi earthquake of 1952 are also available, showed evidence of soil-structure interaction in the way the transfer functions between parking lot and basement motion decayed with increasing frequency in the two lateral directions. It is concluded also that interaction probably had a small effect on the response near the EW fundamental frequency during the San Fernando earthquake. Although theoretical and experimentally determined transfer functions are broadly similar, they do not agree in detail. The lack of good agreement for reasonable choices of the parameters of the theoretical model indicates a need for some modifications of the theory or its application, and a need for more measurements at the site. A similar analysis showed no clear evidence of soil-structure interaction for the Millikan Library and Athanaeum buildings on the campus of the California Institute of Technology. If soil-structure interaction caused the major differences measured in the base motions of these two buildings, it is of a more complex form than that considered by present theories.

Theoretical Load-Transfer Curves along Piles Considering Soil Nonlinearity

Abstract: Soil stress-strain behavior is highly nonlinear and considerably influences the performance of a foundation. The response of single piles under axial load can be predicted from the load-transfer, or t-z, curve. This paper presents a new approach to predict the load-transfer curve and subsequently the load-settlement curve. This new approach incorporates nonlinear soil stress-strain behavior and accommodates differences in soil behavior in laboratory and field conditions. Expressions are given for the load-transfer curve, which capture the hardening and softening behavior of soil-pile interactions. Predictions of load-transfer curves and load-settlement curves from the proposed approach have been compared with the measured values from two case studies. The predictions show good agreement with the measured values.