الفهرس 
MODELUNG OF RECTANGULAR TUNNELSOnly 14 pages are availabe for public view
 |  | from | 223 |  |  |
| | | from | 223 | | |
Abstract
•
The subject of the research york in this thesis 1s the
structural analysis
of shalloy
rectangular
tunnels.
Different plane and space analysis procedures are presented,
and the most convenient ones are selected to be used 1n a
parametric study.
Soil-structure interaction methods using finite element
analysis are chosen to model the problem. Plane strain
9-nodes plate elements and beam elements represent the soil
and the tunnel, respectively, in a plane analysis, yhile
a-nodes brick elements and plate elements represent the soil
and the tunnel, respectively, in a space analysis.
A parametric study is performed to study the behaviour
of the tunnel toyards the effect of varying breadth, height
of covering soil, and the relative inertia of the tunnel’s
sections. Design charts evaluating the tunnel’s dimensions,
deformations, and internal forces are developed concerning
the last mentioned variables. Further study investigating
the behaviour of pre-fabricated top slab tunnels and tyo-bay
tunnels is performed. output data are put in curves and
tabulated to express the tunnel’s response.
The relation between space and plane analysis is
investigated under the influence of different types of •
•
surface
loadings.
Equations
estimating
the actual
space
.ana Lys is
deformations
and
internal forces
in terms of
plane
analys is results are
formulated.
Mean
’While,
curves and
figures displaying
the behaviour of the tunnel
under the
action of
these loads in the cross-sectional
and the
longitudinal directions are drawn.
Different so11 parameters which can be affected by the
type of soil and compaction, are also considered in the
parametric study. stress distribution in the surrounding
soil for some of the investigated cases is illustrated in
figures.