Shear stack on the shaking table
The EERC study the way soils
and structures behave together during earthquakes. They have
designed a special box called a "shear stack" for
testing soils on the shaking-table.
The box is filled with the soil to be studied. (Show
Me) and sometimes, a model of a structure is added to
The shear stack has flexible sides. It is made up from layers
of aluminium frames separated by layers of rubber. This design
makes the soil behave as if it was surrounded by more soil,
and not enclosed in a small space. This represents a real
situation more accurately.
Here are two types of structure that have been tested.