Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

Many authors have considered the kinematic interaction effects as favorable for seismic response of structures. However, this assumption is not always correct, because for some combinations of soil dynamic properties, foundation geometry and structural configuration, the kinematic interaction effects can lead to unfavorable performance of structures during earthquake. Therefore, the kinematic interaction effects increase or decrease the effective excitation that acts on the foundation base, in terms of their translation and rotation components. In this paper the role of kinematic interaction effects is analyzed for plate foundation embedded in different layered soil profiles, using recorded motions and several foundation geometries. Evaluations are carried out using a proposed analytical methodology based on Iguchi´s approach (Iguchi, M., 1982). These analyses are focused to identify key parameters that control kinematic interaction effects, in order to point out specific conditions of foundation and soil profile properties which, if those effects are neglected, it may lead to erroneous conclusions in the assessment of seismic performance of structures. In addition, this paper presents the application of the proposed methodology for the analysis of the kinematic interaction effects on damage caused in some buildings in the city of Cali, Colombia, by the earthquake occurred in the Pacific region of this country in November 15, 2004. Conclusions of this work show the marked influence of foundation geometry and dynamic soil profiles on kinematic interaction effects. These results point out that as stiffness of soil profile decreases, translation components of effective excitation on the foundation base increase for high frequencies and they can reach values greater than those of free-field motion. On the other hand, the study shows that as foundation burial depth increases, the rotation components of the effective excitation on the foundation base increases in such way, that these components can get the control of seismic performance of high structures. Conclusions of this paper stand out the importance of kinematic interaction effects on soil-foundation-structure interaction analysis.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Aug 11th, 12:00 AM Aug 16th, 12:00 AM

Influence of Kinematic Interaction Effects on Earthquake Structure Response: Analysis of These Effects in the Colombia Earthquake of November 15, 2004

Arlington, Virginia

Many authors have considered the kinematic interaction effects as favorable for seismic response of structures. However, this assumption is not always correct, because for some combinations of soil dynamic properties, foundation geometry and structural configuration, the kinematic interaction effects can lead to unfavorable performance of structures during earthquake. Therefore, the kinematic interaction effects increase or decrease the effective excitation that acts on the foundation base, in terms of their translation and rotation components. In this paper the role of kinematic interaction effects is analyzed for plate foundation embedded in different layered soil profiles, using recorded motions and several foundation geometries. Evaluations are carried out using a proposed analytical methodology based on Iguchi´s approach (Iguchi, M., 1982). These analyses are focused to identify key parameters that control kinematic interaction effects, in order to point out specific conditions of foundation and soil profile properties which, if those effects are neglected, it may lead to erroneous conclusions in the assessment of seismic performance of structures. In addition, this paper presents the application of the proposed methodology for the analysis of the kinematic interaction effects on damage caused in some buildings in the city of Cali, Colombia, by the earthquake occurred in the Pacific region of this country in November 15, 2004. Conclusions of this work show the marked influence of foundation geometry and dynamic soil profiles on kinematic interaction effects. These results point out that as stiffness of soil profile decreases, translation components of effective excitation on the foundation base increase for high frequencies and they can reach values greater than those of free-field motion. On the other hand, the study shows that as foundation burial depth increases, the rotation components of the effective excitation on the foundation base increases in such way, that these components can get the control of seismic performance of high structures. Conclusions of this paper stand out the importance of kinematic interaction effects on soil-foundation-structure interaction analysis.