Analytical Modeling for Soil-Structure Interaction of a 6-Story Commercial Office Building.

Published

July 10, 1994

Author(s)

Long T. Phan, E M. Hendrickson, R D. Marshall, M Celebi

Abstract

Strong-motion and ambient vibration data obtained from a 6-story commercial office building in San Bruno, California, were analyzed. Comparison of dynamic characteristics revealed that the first-mode response frequency deduced from the Loma Prieta earthquake records is significantly lower than that deduced from ambient vibration data, and the damping ratio for strong motion is higher than that obtained from ambient vibration. A computer model of the building was developed and analyzed using two boundary conditions. The fixed-base condition was used to simulate the building response to ambient vibration, and the spring-supported condition was used to incorporate soil-structure interaction and thus simulate realistic building response to the Loma Prieta earthquake. Results of analyses showed that the first-mode response frequencies for the two cases differ by essentially the same factor observed from measurements. This suggests that the difference in first-mode response frequencies between ambient vibration and strong motion in this building was due largely to soil-structure interaction.

Proceedings Title

Earthquake Engineering Research Institute. Earthquake Awareness and Mitigation Across the Nation. U.S. National Conference, Fifth (5th). Proceedings. Volume 1

Conference Dates

July 10-14, 1994

Conference Location

Chicago, IL

Conference Title

July 10-14, 1994, Chicago, IL, 199-208 pp, 1994.

Pub Type

Conferences

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Keywords

office buildings, commercial buildings, earthquakes, computer models, vibration, structural response, instruments, dynamic characteristics

Citation

Phan, L. , Hendrickson, E. , Marshall, R. and Celebi, M. (1994), Analytical Modeling for Soil-Structure Interaction of a 6-Story Commercial Office Building., Earthquake Engineering Research Institute. Earthquake Awareness and Mitigation Across the Nation. U.S. National Conference, Fifth (5th). Proceedings. Volume 1, Chicago, IL, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=916670 (Accessed October 27, 2025)