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A simple displacement model for response analysis of EPS geofoam seismic buffers |
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| Authors: | Richard J Bathurst Amin Keshavarz Saman Zarnani W Andy Take |
| Institution: | aGeoEngineering Centre at Queen's-RMC, Department of Civil Engineering, 13 General Crerar, Sawyer Building, Room 2085, Royal Military College of Canada, Kingston, Ont., Canada K7K 7B4;bGeoEngineering Centre at Queen's-RMC, Queen's University, Kingston, Ont., Canada K7L 3N6;cGeoEngineering Centre at Queen's-RMC, Department of Civil Engineering, Queen's University, Kingston, Ont., Canada K7L 3N6 |
| Abstract: | A simple displacement-type block model is proposed to compute the compression–load–time response of an idealized seismic buffer placed against a rigid wall and used to attenuate earthquake-induced dynamic loads. The seismic buffer is modelled as a linear elastic material and the soil wedge shear surface by a stress-dependent linear spring. The model is shown to capture the trends observed in four physical reduced-scale model shaking table tests carried out with similar boundary conditions up to a base excitation level of about 0.7g. In most cases, quantitative predictions are in reasonable agreement with physical test results. The model is simple and provides a possible framework for the development of advanced models that can accommodate more complex constitutive laws for the component materials and a wider range of problem geometry. |
| Keywords: | Geofoam Expanded polystyrene Earthquake Seismic buffer Displacement model Shaking table Numerical modelling Physical testing |
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