SPRING 2014
Analysis of Two-Way RC Slab under Impact Load
by
Ashraful Islam & Md. Jafar Ikbal
With a growing
awareness to resist both dynamic and static loads, several structures need to be
designed for impact loads. An accidental impact load can be caused by mishaps in
industry as well as accidents stemming from transportation or man-made
disasters.
The overall
objective of the study is to investigate the dynamic behavior of reinforced
concrete slab under impact loading with respect to displacement and time. This
study investigates the effects of different types of applied impact loads and
shock absorbing foams on the dynamic response and behavior of reinforced
concrete slabs. Displacements vs. time relationship for all the specimens are
studied. The numerical study is based on nonlinear dynamic analysis using the
software ABAQUS, possibly the first such work in this country.
The numerical
results are compared with results obtained from the field test data. Drop weight
tests are performed on eight RC slab specimens (size 4ft × 4ft × 1in) loaded by
two impactors (weighing 150 lb and 500 lb). The numerical results matched
reasonably well with the field data in some cases, but not too well in some
other cases, particularly ones with shock absorbing foams. This shows some
possible room for improvement required in both the numerical and experimental
works performed.