Civil Engineering Reference
In-Depth Information
Chapter 4
Experimental Tests on Parameters
Influencing on Shear
4.1 Introduction
This chapter develops and explains the criteria for obtaining self-compacting
ber
reinforced concrete (SCFRC) and the analysis of its production quality continuity in
a precast industry and its ulterior application to produce prestressed concrete beams
to minimize traditional transverse rebars.
An experimental program consisting in nine prestressed I-beams with unequal
fl
ber contribution to shear behavior.
The main objective of the research described in this chapter is to analyze the
shear behavior of real mass-produced prestressed beams made with high-strength
self-compacting
ange dimensions was developed to analyze
ber-reinforced concrete (SCFRC). The main goals of the study
were to:
Propose a consistent SCFRC mix design adapted for continuous use in the
precast industry.
Evaluate the possibility of replacing all
the transverse reinforcement and
secondary rebars by steel
bers.
Analyze the theoretical shear strength values according to the safety margins of
current international Codes, which are obtained as the experimental-to-theo-
retical shear strength ratio.
Check the possible in
fl
uence of
fl
ange size on shear behavior.
4.2 Concrete Mix Designs
Reference SCC and a SCFRC with 60 kg/m
3
(Vf = 0.75 %) of steel
bers, a
nominal slump
ow of 600 mm and an average compressive strength of about
60 MPa at 28 days were used in the study. This performance was chosen to obtain
fl
Search WWH ::
Custom Search