Field-Testing and Modeling of Soil-Structure Interaction for Highway Support Structures

2007 ◽  
Author(s):  
Payman Khalili-Tehrani ◽  
Eric Ahlberg ◽  
Changsoon Rha ◽  
Anne Lemnitzer ◽  
Alberto Salamanca ◽  
...  
Keyword(s):  
Soil Structure ◽  
Field Testing ◽  
Soil Structure Interaction ◽  
Support Structures ◽  
Structure Interaction

Performance of a raft foundation supporting a multistorey structure

1988 ◽  
Vol 25 (1) ◽  
pp. 138-149 ◽  
Author(s):  
A. O. Landva ◽  
A. J. Valsangkar ◽  
J. C. Alkins ◽  
P. D. Charalambous
Keyword(s):  
Soil Structure ◽  
Thick Layer ◽  
Field Testing ◽  
Soil Structure Interaction ◽  
Foundation Soil ◽  
Structure Interaction ◽  
Raft Foundation ◽  
Undisturbed Samples ◽  
Clayey Silt ◽  
Load Cells

A nine-storey structure was recently constructed on a raft founded on a 30 m thick layer of clayey silt at Fredericton, New Brunswick. Detailed soil investigations included conventional borings and self-boring pressuremeter, field vane, and flat dilatometer tests performed at the site. In addition to the field testing, undisturbed samples were obtained and tested in the laboratory to determine the compressibility and shear strength characteristics. To compare the performance of the foundation with the design assumptions, instrumentation consisting of piezometers, contact pressure load cells, and settlement points was installed. The instrumentation was monitored at regular intervals during the construction stage and at 6 month intervals following the completion of the building. This report presents (i) the results of the field and laboratory testing, (ii) the results of the field monitoring, and (iii) the results of a finite element computer analysis of the foundation-soil interaction. Key words: raft foundation, instrumentation, clayey silt, compressibility, soil tests, soil–structure interaction.

scholarly journals Seismic soil-structure interaction analysis of wind turbine support structures using augmented complex mode superposition response spectrum method

2021 ◽  
Author(s):  
Masaru Kitahara ◽  
Takeshi Ishihara
Keyword(s):  
Wind Turbine ◽  
Soil Structure ◽  
Response Spectrum ◽  
Soil Structure Interaction ◽  
Support Structures ◽  
Complex Mode ◽  
Structure Interaction ◽  
Mode Superposition ◽  
Spectrum Method ◽  
Seismic Loadings

Abstract. In this study, the seismic soil-structure interaction (SSI) of wind turbine support structures is investigated using response spectrum method (RSM) based on the complex eigenmodes. Seismic loadings on wind turbine support structures are newly derived by complex mode superposition RSM. To improve the prediction accuracy of the shear force acting on footings, this method is augmented by introducing the upper limit of modal damping ratios of 10 %. In addition, the bending moment at the hub height due to the mass moment of inertia of rotor and nacelle assembly is considered as an additional loading. The proposed method is validated by comparison with time history analysis (THA) accounting for different types of foundations and different tower geometries. Seismic loadings acting on the towers and footings by the proposed method show favourable agreement with the mean results by THA of several input acceleration time histories, while the original complex mode superposition RSM strongly underestimates shear forces acting on footings.

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