Soil-Structure Interaction and Site Response at the Jensen Filtration Plant during the 1994 Northridge, California, Mainshock and Aftershocks

2003 ◽  
Vol 93 (2) ◽  
pp. 546-556 ◽  
Author(s):  
C. B. Crouse
Keyword(s):  
Soil Structure ◽  
Site Response ◽  
Soil Structure Interaction ◽  
Structure Interaction

Seismic response of sands in centrifuge tests

2008 ◽  
Vol 45 (4) ◽  
pp. 470-483 ◽  
Author(s):  
Mohammad H.T. Rayhani ◽  
M. Hesham El Naggar
Keyword(s):  
Shear Modulus ◽  
Seismic Response ◽  
Soil Structure ◽  
Site Response ◽  
Damping Ratio ◽  
Soil Structure Interaction ◽  
Response Analysis ◽  
Structure Interaction ◽  
Centrifuge Tests ◽  
Seismic Site Response

Seismic site response of sandy soils and seismic soil–structure interaction are investigated using an electrohydraulic earthquake simulator mounted on a centrifuge container at an 80g field. The results of testing uniform and layered loose to medium-dense sand models subjected to 13 simulated earthquakes on the centrifuge are presented. The variation of shear modulus and damping ratio with shear strain amplitude and confining pressure was evaluated and their effects on site response were assessed. The evaluated shear modulus and damping ratio agreed reasonably with laboratory tests and empirical relationships. Site response analysis using the measured shear wave velocity and estimated modulus reduction and damping ratio as input parameters produced good agreement with the measured site response. The effect of soil–structure interaction for structures situated on dry sand is also investigated. These tests have revealed many important insights with regard to the characteristics of seismic site response and seismic soil–structure behaviour. The tests showed that the seismic response of soil deposits, input motions, and overall behaviour of the structure are affected by soil stratification. The results showed that the seismic kinematic soil–structure interaction is not very significant for structures situated on loose sand.

RECENT ADVANCES IN DYNAMIC INVESTIGATION OF LEANING TOWER OF PISA

2019 ◽  
Vol 1 (Special Issue on First SACEE'19) ◽  
pp. 21-30
Author(s):  
Camillo Nuti ◽  
Gabriele Fiorentino
Keyword(s):  
Middle Ages ◽  
Soil Structure ◽  
Site Response ◽  
Historical Seismicity ◽  
Soil Structure Interaction ◽  
Response Analysis ◽  
Dynamic Identification ◽  
World Heritage Sites ◽  
Structure Interaction ◽  
Heritage Sites

The Leaning Bell Tower of Pisa has been included in the list of the World Heritage Sites by United Nations Educational, Scientific and Cultural Organization since 1987. Over the last twenty years, the Tower has successfully undergone a number of interventions to reduce its inclination. Despite its importance in the Italian cultural heritage, no studies about the dynamic behaviour of this monument had been carried out until the 1990s. Starting from the results obtained by the Committee for the Safeguard of the Tower, a novel investigation campaign about the dynamic parameters characterising the Tower has begun in 2014. This paper aims at discussing the main results obtained until today. After a short history of the construction and of the interventions on the Tower, the following topics are discussed: a review of historical seismicity, dynamic identification, definition of seismic input, site response analysis, and seismic response accounting for soil-structure interaction. The studies made on the Tower highlight the importance of soil-structure interaction in the survival of the Tower due to strong seismic events since the middle ages.

Importance of seismic site response and soil–structure interaction in dynamic behaviour of a tall building

Géotechnique ◽  
2015 ◽  
Vol 65 (5) ◽  
pp. 391-400 ◽  
Author(s):  
E. Bilotta ◽  
L.De Sanctis ◽  
R. Di Laora ◽  
A. D'Onofrio ◽  
F. Silvestri
Keyword(s):  
Soil Structure ◽  
Dynamic Behaviour ◽  
Site Response ◽  
Tall Building ◽  
Soil Structure Interaction ◽  
Structure Interaction ◽  
Seismic Site Response

Non Linear Seismic Pile Soil Structure Interaction Analysis of Piles in Offshore Platforms

2004 ◽  
Author(s):  
Mehrdad Kimiaei ◽  
Mohsen Ali Shayanfar ◽  
M. Hesham El Naggar ◽  
Ali Akbar Aghakouchak
Keyword(s):  
Soil Structure ◽  
Seismic Analysis ◽  
Interaction Analysis ◽  
Site Response ◽  
Free Field ◽  
Soil Structure Interaction ◽  
Model Parameters ◽  
Winkler Foundation ◽  
Offshore Platforms ◽  
Structure Interaction

Pile supported offshore platforms in seismically active areas should be designed to survive severe earthquake excitations with no global structural failure. It is often required to perform nonlinear seismic analysis of offshore platforms that accounts for soil nonlinearity, discontinuity condition at pile soil interfaces, energy dissipation through soil radiation damping and structural nonlinear behaviours of the piles. In this study a BNWF (Beam on Nonlinear Winkler Foundation) model is incorporated into a finite element program (ANSYS) and it is used to compute the lateral response of piles subjected to seismic loading. The soil stiffness is established using the P-Y curve. The results of equivalent linear earthquake free field ground motion analyses are used as the input excitations at support nodes of the model. The components and advantages of this practical ANSYS model in seismic pile soil structure interaction analyses are discussed and addressed in detail. Computed responses compared well with the experimental test results. Sensitivity of the results to model parameters and site response calculations are evaluated.

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