Authors:
Amer M. Ibrahim;
Abstract:
This paper presents the results of a parametric study of the flexural behavior of continuous concrete members
prestressed with external tendons. The behavior at ultimate limit states is evaluated. A nonlinear analysis
model, based on the three dimensional finite element method, ANSYS computer program (10.0) was used.
The nonlinear material and geometrical analysis were adopted. The results obtained show good agreement
with experimental results. This research was carried out to study the effects of several factors on the overall
behavior of externally prestressed beams in terms of the values of compressive concrete strength and effective
prestressing stress. That behavior was slightly affected compared with experimental results. The undeviated
external tendons mobilized lower nominal flexural resistance and inelastic deflection than deviated tendons
did. The increase in the beam capacity in the beam subjected to loads at the third span is greater than in the
beam with a single load at the mid – span. The result of increasing the effective depth is that the ultimate load
capacity is essentially increased.
Keywords:
ANSYS, Flexural behavior, Concrete continuous members, External prestressing,