EXPERIMENTAL STUDY ON THE BEHAVIOUR OF HIGH-STRENGTH PARTIALLY PRESTRESSED T-SECTIONBEAMS

Al Hashemi, Tariq Hani

EXPERIMENTAL STUDY ON THE BEHAVIOUR OF HIGH-STRENGTH PARTIALLY PRESTRESSED T-SECTIONBEAMS

Document Type : Scientific and technological

Author

Tariq Hani Al Hashemi

Teaching Assistant, Structural Dept., Ain Shams University, Egypt

Abstract

In recent years, high strength concrete (HSC) has been widely used. With advent of super plasticizers and micro-silica; HSC with strength higher than 100 MPa can be reached. This helped in many fields of construction; specifically pretensioned bridge girders. This high strength permitted longer spans, larger spacing between girders thus reducing total bridge cost. Lately, designers have been using partially prestressed members technique, which tends to decrease the prestressing steel and eventually leads to more economical sectional design. The Use of HSC partially prestressed girders is very promising, however HSC was found to be more brittle. Accordingly, the girder may exhibit brittle/less ductile behavior and less deformability. There is also lack of knowledge about the effect of HSC on cracking pattern of such members. This study presents experimental observations for the deflection and cracking behaviour along with ductility study of six tested partially prestressed beams.

Keywords

References

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