Soil structure interaction

About: Soil structure interaction is a research topic. Over the lifetime, 3653 publications have been published within this topic receiving 48890 citations.

Evaluation of Soil-Structure Interaction and Structural Collapse in Daikai Subway Station During Kobe Earthquake

Abstract: An evaluation of the collapse of a large portion of the Daikai subway station during the 1995 Kobe earthquake is presented based on results from nonlinear finite element analyses. The numerical studies focused on two main aspects: 1) evaluation of soil-structure interaction and drift demands imposed on the Daikai Subway Station, and 2) evaluation of the drift capacity of the reinforced concrete (RC) columns that collapsed during the Kobe earthquake. Results from this study indicate that the estimated drift and shear stress demands in the critical columns of the Daikai station— approximately 1.1% and 2.2 MPa, respectively—were sufficient to cause failure of the central RC columns of the Daikai station due to poor transverse reinforcement detailing combined with moderate axial load demands. On the other hand, the central RC columns of an adjacent running tunnel structure survived the earthquake motions with limited damage due to lower drift and shear stress demands (0.8% and 1.0 MPa, respectively), and the use of an enhanced transverse reinforcement detailing. The use of the Elwood-Moehle column collapse model led to the prediction of a reasonable range of drifts at which collapse was expected in the RC columns of the Daikai station.

Tunnelling-induced deformation and damage on historical masonry structures

Abstract: The analysis of deformation and damage mechanisms induced by shallow tunnelling on masonry structures is carried out using an integrated, geotechnical and structural, numerical approach based on two-dimensional finite-element analyses. The masonry construction, schematised as a block structure with periodic texture, is regarded at a macroscopic scale as a homogenised anisotropic medium. The overall mechanical properties display anisotropy and singularities in the yield surface, arising from the discrete nature of the block structure and the geometrical arrangement of the blocks. The soil is modelled by means of a linear elastic-perfectly plastic model. The numerical analyses are performed assuming plane strain and plane stress conditions for the soil and the masonry structure, respectively. A displacement-controlled technique is adopted to simulate the tunnel construction, which produces settlement troughs in agreement with the empirical Gaussian predictions at different volume losses under free-field con...

Hyperbolic parameters for compacted soils.

Abstract: Finite element methods are being used more and more during design, in cases involving compacted soil-structure interaction. In general, it is not practical to conduct extensive tests to obtain the compacted soil properties required by the finite element methods during the design phase. Alternatively, if finite element approaches are used for developing design tables, soil properties representative of typical soil types and compaction specifications are required. To provide the needed design soil parameters for a wide variety of soil conditions, laboratory testing is carried out on three soils: a sand, a silt, and a clay. These soils are prepared at density states ranging from loose to 95% of the maximum from the standard compaction tests (American Society for Testing and Materials (ASTM) D698, American Association of State Highway and Transportation Officials (AASHTO) T-99). The tests used to obtain the soil parameters are triaxial compression, isotropic compression, and one-dimensional compression. A consistent set of soil design parameters are obtained by fitting test results to a hyperbolic soil model representing Young’s modulus and bulk modulus as functions of stress.