الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 100 |  |  |
| | | from | 100 | | |
Abstract
Reinforced concrete columns with large dimensions specially used for
bridges are widely used throughout the world in both seismic and nonseismic regions, with the increasing of the global cost of the construction
materials for both concrete and steel, hollow core reinforced concrete
columns shall be used to decrease the amount of concrete used in such
large columns to decrease the total cost of these elements.
This proposed research focuses on the structural behavior of hollow core
columns under lateral cyclic loads, performing complete experimental
program consist of seven hollow columns with dimensions 200x200 mm
and void dimensions 100x100 mm and column height of 1400 mm, each
specimens contains different vertical reinforcement ratio and inner steel
tube with different thicknesses. The study also aims to study the effect of
different axial compression force related to the column ultimate loads, the
control specimen shall be tested without void nor the inner steel tube to
study their effects with the previously mentioned parameters. The inner
steel tube shall be used increase the concrete confinement and enhance
the shear resistance of the hollow columns.
The experimental program provides different results such as ultimate
failure loads, load displacement hysteresis curve, crack pattern and mode
of failure, the analysis and discussion of these results performing ductility
index and energy dissipation proves the ability of the steel tube and the
high reinforcement ratio to overcome the decreased area of concrete, the
results shall be compared to the control samples and final conclusions and
recommendation for future study shall be presented.