Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

In general, under earthquake loading, the soil reaches the limit of its elastic behavior before the structural elements. Thus, an earthquake analysis approach assuming inelastic structural behavior under fixed base condition or with elastic dynamic soil-structure interaction (DSSI) hypothesis may be inadapted. This paper describes the investigation conducted in order to define the contribution of the pure elastic DSSI effects in the complete inelastic DSSI problem. With this purpose, a comparative analysis between elastic and inelastic soil behavior assumptions for two inelastic single-degree-of-freedom (SDOF) structures and two soils is carried out. The results point out that, in general, inelastic soil behavior plays a decisive role only when the soil is saturated. When the soil is in dry condition, an elastic DSSI approach seems to be accurate enough to take into account the modification of the structural response due to DSSI. Differences in structural dynamics responses are related to pore pressure generation induced in the inelastic case and neglected when elastic soil behavior is assumed.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fifth Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-24-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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May 24th, 12:00 AM May 29th, 12:00 AM

Effect of Elastic and Inelastic DSSI on Seismic Demands of SDOFs Structures

San Diego, California

In general, under earthquake loading, the soil reaches the limit of its elastic behavior before the structural elements. Thus, an earthquake analysis approach assuming inelastic structural behavior under fixed base condition or with elastic dynamic soil-structure interaction (DSSI) hypothesis may be inadapted. This paper describes the investigation conducted in order to define the contribution of the pure elastic DSSI effects in the complete inelastic DSSI problem. With this purpose, a comparative analysis between elastic and inelastic soil behavior assumptions for two inelastic single-degree-of-freedom (SDOF) structures and two soils is carried out. The results point out that, in general, inelastic soil behavior plays a decisive role only when the soil is saturated. When the soil is in dry condition, an elastic DSSI approach seems to be accurate enough to take into account the modification of the structural response due to DSSI. Differences in structural dynamics responses are related to pore pressure generation induced in the inelastic case and neglected when elastic soil behavior is assumed.