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Two directional cyclic loading experiments in a hollow cylinder apparatus

Abstract:

Investigation of soil behaviour in laboratories should follow stress states and loading functions required for the representative field situation as closely as possible. In earthquake engineering, the investigated stress state simulated in the laboratory is often adapted to the testing devices available. Generally this includes cyclic or earthquake loading in one (shear) direction. With the new hollow cylinder apparatus at the Institute for Geotechnical Engineering at ETH Zurich, it is possible to apply bi-directional loading and any possible stress state in the soil prior to testing. This allows the reproduction of any stress state in the subsoil underneath a structure and the implementation of horizontal and vertical earthquake shaking. Experiments with fine sand are carried out to simulate a stress state close to a building under simultaneously applied bi-directional cyclic loading. Primary results are presented, focusing on the influence of stress state and the form and relative magnitude of bi-directional cyclic loading to be considered in soil structure interaction. Results of the first test series demonstrate the capability of the test apparatus.

Authors:

Buchheister, Juliane and Laue, Jan

Index Terms:

SoilGroup; hollow cylinder apparatus; liquefaction; Buchheister, Juliane; Laue, Jan

Further Information:

Date published: 03.09.2006