This paper presents the experimental findings of cyclic loading test of ten half scale model of reinforced concrete bridge
pier which were retrofitted by external wrapping using continuous fiber sheet with
large fracturing strain, such as aramid (Technora), PEN (Polyethylene Naphthalate), and PET (Polyethylene Terephthalate / Polyester) materials. These specimens were tested under static axial (1MPa) and reversed horizontal loading to represent earthquake excitation. The key mechanical properties of these materials are low tensile modulus of elasticity and large fracturing strain. The objective of this experiment is to get the optimum solution to achieve 10 δy as the
ultimate deformation. The experimental results on the hysteretic response of test piers, ductility analysis, energy dissipation, and shear deformation on the plastic hinge are presented. The existing formulae for ductility prediction of members with carbon and aramid sheet are not applicable to members with PET sheet.
Key Words: cyclic loading, external wrapping, large fracturing strain, ultimate deformation