Theoretical evaluation of uniaxial flexural behavior of ultrahigh performance reinforced concrete members

الملخص EN

Ultra High Performance Concrete (UHPC) is an advanced cementitious composite consisting of a
dense high strength matrix and fibers.

UHPC is used in various fields worldwide due to its high
characteristics mainly high compressive strength.

The last researches studied the UHPC from the
material level as the main components and its characteristics that vary from those of conventional
concrete.

So, UHPC need to be studied more from the structural level to predict the flexure
capacity, ductility and serviceability.

This paper runs a numerical data for structural behavior of
UHPC with the concrete compressive strength parameter.

Five finite element models were
developed and solved by ANSYS software to examine the effect of the concrete compressive
strength on structural behavior of UHPC simple beams.

The results showed that increasing the
concrete compressive strength from 115 to 150 MPa led to increase the flexure capacity by 5.4%
and remains constant from 150 to 215 MPa.

While, the stiffness was decreased by 35 % from 115
to 215 MPa.