TOWARDS THE DESIGN OF DUCTILE REINFORCED HIGH
STRENGTH CONCRETE COLUMNS
29th Our World in Concrete and Structures (OWICs) - 2004
S.K.Kaushik*, Indian Institute of Technology, Roorkee, India
Pradeep Bhargava, Indian Institute of Technology, Roorkee, India
Umesh Sharma, Indian Institute of Technology, Roorkee, India
Confinement, Columns, Ductility, Fibers.
High strength concrete (HSC) has gained wide acceptance in the recent years owing to its many advantages over normal strength concrete. One of the potential applications of HSC is in the lower story columns of multistory buildings. But, high strength concrete has poor post-peak deformation capacity, which questions its applicability in seismic regions. In this analytical & experimental study, the behavior of reinforced high strength concrete columns was investigated under axial loads as well a s a xial load with flexure. The viability of applying the various present codes requirements of providing special confining reinforcement to HSC columns in the potential plastic hinge regions was examined. The study shows that the present code
specifications do not impart the same ductility to columns made of higher concrete grades as that to normal strength concrete columns. As a solution to the problem of lower ductility of high strength concrete columns, the concept of using a combination of suitable fibers along with lateral confining steel has been mooted.