E4tW-Home Research
Patrik
Ongoing
research Physical Tests
Ongoing UDEC Models (most
recent first)
Third UDEC Model Video (Need ITASCA Movie Viewer: Download) The internal pressure of this two-wythe, 27x50 model was modeled to varie from p=1e6 at the bottom and p=0 at the top. The friction value, normal stiffness, and shear modulus are 100, 1e9, 1e9 respectively. The failure observed is some
sliding at the base and out-of-plane bending of the walls centered at
about 1/3 of the wall height. This is what is expected for a linearly
increasing pressure, which will have a resultant at this height too.. |
 2-wythe model |
 Overturning Failure |
Second UDEC Model Video (Need ITASCA Movie Viewer: Download) The internal pressure of this two-wythe, 27x50 model was modeled to varie from p=1e6 at the bottom and p=0 at the top. The friction value, normal stiffness, and shear modulus are 50, 1e7, 1e7 respectively. The failure observed is some
sliding at the base and out-of-plane bending of the walls centered at
about 1/3 of the wall height. This is what is expected for a linearly
increasing pressure, which will have a resultant at this height too.. |
2-wythe model |
Bursting Failure |
|
This first model was done using UDEC. The purpose was to mimic the two failure modes observed in the empirical tests. To obtain the overturning failure, the model was built with cubical blocks to a height of 45cm. The first block from the bottom was fixed. The friction angle between the blocks was set to 20 and the vertical downwards and horizontal acceleration set to 1g and 0.2g. To obtain the sliding failure,
the model was built with cubical blocks to a height of 45cm. The first
block from the bottom was fixed. The second and third rows contained a
pair of wedged blocks (10 degrees). The friction angle between the blocks
was set to 10 and the vertical downwards and horizontal acceleration set
to 1g and 0.2g |
 Overturning Failure |
 Sliding Failure |
