Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

As high rises are built or designed for in areas of high seismic activities, it is critical to examine their seismic responses using analysis code that reveals a more realistic view of the behavior of these structures for their performance under strong seismic shaking. To understand the seismic soil-structure interaction effects, a 33-story building and a 20-story building were subjected to seismic response analysis using SSI-3D. To reflect the evolution of SSI effects, analyses were performed for the cases with rigid base, flexible base with linear foundation springs, flexible base with linear soil, flexible with nonlinear springs, and the full SSI analysis of flexible base with nonlinear soils. The last case depicts the most realistic SSI responses of the high rise. Results of analyses presented in this article include: periods, base shear, and the displacement of the top of the buildings. It was observed that the top displacements increase and the base shears decrease as the base become more flexible for the buildings with regular shape. For the buildings with irregular shape, the above observation is no longer true.

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

Soil-Structure Interaction Effects of High Rise Buildings

Arlington, Virginia

As high rises are built or designed for in areas of high seismic activities, it is critical to examine their seismic responses using analysis code that reveals a more realistic view of the behavior of these structures for their performance under strong seismic shaking. To understand the seismic soil-structure interaction effects, a 33-story building and a 20-story building were subjected to seismic response analysis using SSI-3D. To reflect the evolution of SSI effects, analyses were performed for the cases with rigid base, flexible base with linear foundation springs, flexible base with linear soil, flexible with nonlinear springs, and the full SSI analysis of flexible base with nonlinear soils. The last case depicts the most realistic SSI responses of the high rise. Results of analyses presented in this article include: periods, base shear, and the displacement of the top of the buildings. It was observed that the top displacements increase and the base shears decrease as the base become more flexible for the buildings with regular shape. For the buildings with irregular shape, the above observation is no longer true.