A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Vibration Characteristics of Foundation and Free-Field Motions of Instrumented Buildings During Earthquakes
Soil-foundation-structure interaction during earthquakes is characterized by several important aspects, including the variation between the free-field and foundation-level ground motions. This variation is primarily attributed to the kinematic interaction between soil and stiff foundation slabs and embedment effects. This paper presents the results of a study of 22 instrumented buildings in California, which have records from both at the foundation level and at a nearby free-field site. A total of 215 earthquake records of sensor located in the free-field site, basement-slab and ground floor have been analyzed and compared. Comparison of dynamic characteristics of free-field site and foundation motions in those buildings provide confirmation of reduced foundation motion by interaction of foundation and soil. It is consistently observed that the effect is pronounced in the high frequency ranges. A comparative analysis of power spectral density functions of corresponding records and associated coherence, phase shift and transfer function between them is also presented and discussed. These observations are contrasted with state-of-practice analytical models suggested by other researchers.
Vibration Characteristics of Foundation and Free-Field Motions of Instrumented Buildings During Earthquakes
Soil-foundation-structure interaction during earthquakes is characterized by several important aspects, including the variation between the free-field and foundation-level ground motions. This variation is primarily attributed to the kinematic interaction between soil and stiff foundation slabs and embedment effects. This paper presents the results of a study of 22 instrumented buildings in California, which have records from both at the foundation level and at a nearby free-field site. A total of 215 earthquake records of sensor located in the free-field site, basement-slab and ground floor have been analyzed and compared. Comparison of dynamic characteristics of free-field site and foundation motions in those buildings provide confirmation of reduced foundation motion by interaction of foundation and soil. It is consistently observed that the effect is pronounced in the high frequency ranges. A comparative analysis of power spectral density functions of corresponding records and associated coherence, phase shift and transfer function between them is also presented and discussed. These observations are contrasted with state-of-practice analytical models suggested by other researchers.
Vibration Characteristics of Foundation and Free-Field Motions of Instrumented Buildings During Earthquakes
Conf.Proceedings of Society
Caicedo, J.M. (editor) / Catbas, F.N. (editor) / Cunha, A. (editor) / Racic, V. (editor) / Reynolds, P. (editor) / Salyards, K. (editor) / Pandey, Bishnu H. (author) / Ventura, Carlos E. (author) / Finn, W. D. Liam (author)
2012-03-06
9 pages
Article/Chapter (Book)
Electronic Resource
English
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