3th WCSET-2014 at Nepal
Keynote Session:
Title:
Oversized Predrilled Holes in Skewed Integral Abutment
Jointless Bridges
Authors:
Amde M. Amde
Abstract:
Integral abutment bridges, despite their limitations,
represent the preferred option of state transportation
agencies for both new and replacement bridges. This is
due to their advantages over conventional bridges,
including construction and maintenance cost savings.
Bridge length is one of most notable limitations of
integral abutment bridges. This is attributed to the
fact that longer integral abutment bridges cause high
bending stresses in the piles supporting integral
abutments. Consequently, finding a way to reduce pile
stresses may allow construction of longer integral
bridges. Predrilled oversize holes of adequate depth
filled with loose sand after pile driving is one of the
most effective methods to reduce pile bending stresses.
This paper investigates the relation between depth of
predrilled holes and reduction in pile bending stresses.
Analysis results confirm the reduction in pile bending
stresses as a result of predrilling holes of adequate
depth filled with loose sand and effective depth for
predrilled holes is discussed.
Keywords: Bridge abutments;
finite element method; Integral abutment bridges; Joint
less Bridges; Skewed bridges; Steel piles.
Pages:
018-024