| Summary: | 碩士 === 國立中央大學 === 土木工程學系 === 107 === Taiwan is located between Eurasian plate and Philippine sea plate, so
the effect of earthquake must be considered in the engineering design. The
area close to the active fault must be paid more attention to the damage
from the fault rupture. In recent years, events such as the Chi-Chi
earthquake, Izmit earthquake, Wenchuan earthquake and Fukushima
earthquake caused serious damages to the structures and lives. After the
earthquake, the propagation of reverse faults through soil layers to the
ground surface has been observed to cause damages to infrastructure.
Furthermore, the interaction between a fault propagating through a sand
layer and a shallow foundation can be beneficial for heavily loaded
foundations because this loading condition can deviate fault away from the
foundation.
In this research, we have used the models in Chang (2013) as base
models, in which centrifuge modelling of fault–foundation interaction was
simulated. The tests revealed interaction between fault and foundation and
found that the foundation and soil response depend on the foundation
loading, position, and breadth.
To observe the variation of stress states in different location within the
soil layers with different parameters, the model is separated into shallow
layer, medium layer and deep layer in the vertical direction, and divided
into three zones depending on the horizontal location (hanging wall zone,
triangular shear zone and footwall zone). Measurement circles are placed
in the model to measure the stresses according to the above zoning and the
results are shown by stress paths. The results show that compression
between footing wall and hanging wall affects the development of
horizontal stress obviously, it increases the values of horizontal stress.
Finally, the effect of foundation location and loadings are discussed by the
development of shear zones and stress paths.
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