Location
New York, New York
Date
14 Apr 2004, 4:30 pm - 6:30 pm
Abstract
This case study involves analysis of seismic records observation at two adjacent buildings, similarly constructed except that one is fitted with the base isolation system, to investigate the nature of soil-structure interaction mechanism involved. Altogether 19 earthquake records with maximum acceleration of over 10 cm/s2 are selected for the analyses. The south face of the building site slopes downward at an angle of about 20 degrees, which may contribute to topographical effect in wave propagation through the ground. Effects of the surface irregularity to the observed records are also discussed based on the interrelation between peak values of acceleration, velocity, spectral ordinate at 5% damping and Fourier spectral amplitudes. Inertial and kinematic interaction effects are also discussed based on the ratio of spectral amplitudes. Correlation analysis is subsequently carried out by obtaining coherency function and phase spectra. Results from coherency, phase lag, acceleration time history in limited frequency bands, and trends in particle motion orbits indicate that the free field motion at filled ground close to the sloping ground is out of phase building foundation (1F) motion at lower frequencies.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2004 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Mitsuji, Kazuya; Karkee, Madan B.; and Sugimura, Yoshihiro, "Dynamic Soil-Structure Interaction in Low-Rise Buildings from Seismic Records" (2004). International Conference on Case Histories in Geotechnical Engineering. 24.
https://scholarsmine.mst.edu/icchge/5icchge/session01/24
Dynamic Soil-Structure Interaction in Low-Rise Buildings from Seismic Records
New York, New York
This case study involves analysis of seismic records observation at two adjacent buildings, similarly constructed except that one is fitted with the base isolation system, to investigate the nature of soil-structure interaction mechanism involved. Altogether 19 earthquake records with maximum acceleration of over 10 cm/s2 are selected for the analyses. The south face of the building site slopes downward at an angle of about 20 degrees, which may contribute to topographical effect in wave propagation through the ground. Effects of the surface irregularity to the observed records are also discussed based on the interrelation between peak values of acceleration, velocity, spectral ordinate at 5% damping and Fourier spectral amplitudes. Inertial and kinematic interaction effects are also discussed based on the ratio of spectral amplitudes. Correlation analysis is subsequently carried out by obtaining coherency function and phase spectra. Results from coherency, phase lag, acceleration time history in limited frequency bands, and trends in particle motion orbits indicate that the free field motion at filled ground close to the sloping ground is out of phase building foundation (1F) motion at lower frequencies.
