China
Africa
Explore chapters and articles related to this topic
Centrifuge modelling of non-displacement piles on a thin bearing layer overlying a clay layer
Published in Andrew McNamara, Sam Divall, Richard Goodey, Neil Taylor, Sarah Stallebrass, Jignasha Panchal, Physical Modelling in Geotechnics, 2018
The bearing behavior of a pile tip on a thin bearing layer overlying clay depends on H/D as well as the strength and stiffness values of the bearing and the lower layer. These have strong nonlinear characteristics and stress-dependency. Therefore, geotechnical centrifuge modeling is conducted in which the stress conditions and soil materials are similar to those of the prototype. Further, the load–settlement relationship for the pile tip is influenced by the pile shape and the installation method; in this study, a round non-displacement pile are modeled as they correspond to the bored pile, which is widely used in Japanese urban areas. The centrifuge with a effective radius of 2.65 m has been described in detail by Nagura et al. (1994). In this study, a centrifugal acceleration of 50g (where g denotes the gravitational acceleration) were applied to a 1/50-scale model.
Development of a window laminar strong box
Published in Andrew McNamara, Sam Divall, Richard Goodey, Neil Taylor, Sarah Stallebrass, Jignasha Panchal, Physical Modelling in Geotechnics, 2018
Geotechnical centrifuge modelling is a technique to replicate geotechnical structures in the field by subjecting small scale models to high centrifugal accelerations. Centrifuge modelling allows testing to be conducted in a controlled environment as compared to full scale testing which is costly and sometimes unfeasible such as in the case of earthquake loading. These benefits have led to the increasing popularity of geotechnical centrifuge modelling with over 100 geotechnical centrifuges currently operating worldwide.
Tuned Mass Damper Positioning Effects on the Seismic Response of a Soil-MDOF-Structure System
Published in Journal of Earthquake Engineering, 2018
Raz Najat Jabary, Gopal S. P. Madabhushi
Centrifuge tests for this study were conducted at 50 g using the Turner beam centrifuge at the Schofield Centre in Cambridge, which is a 10-m diameter 150 g-ton centrifuge. The step-like deformation of the equivalent shear beam (ESB) model container used for testing limits restrained soil movement during shaking and minimizes the reflection of energy from boundary walls to simulate the seismic energy radiating away into the field [Teymur and Madabhushi, 2003]. The stored angular momentum actuator [Madabhushi et al., 1998] and a new servo-hydraulic earthquake actuator [Madabhushi et al., 2012] were used to simulate a wide range of earthquake characteristics. More information on geotechnical centrifuge modeling and the testing facilities available at the Schofield Centre in Cambridge can be found in Madabhushi [2014].
Investigation on the Feasibility of the Use of Biosolid-Soil Mixtures for Zinc Retention in Waste Landfill Barriers
Published in Soil and Sediment Contamination: An International Journal, 2023
Fabiana Artuso, Juliana Lukiantchuki, José Oliveira, Samuel Tarazona, Márcio Almeida, Cláudia Telles Benatti
Hydraulic conductivity values were also assessed based on the formulation for variable head permeability tests applied to the centrifuge conditions during the zinc percolation tests. Concerning the studied materials, the Reynolds number for the experiment ranges from 0.08 × 10−2 to 3.16 × 10−2, therefore the validity of Darcy’s Law for geotechnical centrifuge modeling is ensured (Kumar 2007).