TITLE:
Behavior Characteristics of Bonded Type Anchorage for CFRP Tendon
AUTHORS:
Jong Sup Park, Woo Tai Jung, Jae Yoon Kang, Moon Seoung Kum
KEYWORDS:
CFRP Tendon; Prestressing; Anchorage; Wedge
JOURNAL NAME:
Engineering,
Vol.5 No.11,
November
7,
2013
ABSTRACT: This paper examines the shear stress and displacement
occurring in CFRP tendons through finite element analysis on the parameters
influencing the anchoring performance to evaluate the behavioral
characteristics of the bonded type anchorage for CFRP tendon. The selected
parameters are the inner angle of the anchorage barrel, the friction between
the barrel and filling material, and the elastic modulus of the filling
material. The difference in the behavioral characteristics is examined for each
parameter. In view of the analytic results, the shear stress developed in the
CFRP tendon reduces with larger inner angle of the barrel and lower elastic
modulus of the filling material. However, such combination provokes also the
increase of the relative displacement of the CFRP tendon. Especially, slip
failure may occur due to the lack of the confining force necessary for the
anchorage due to the sudden loss of vertical force brought by the wedge force.
The experimental results relative to barrel inner angles of 2° and 4° showed
that the specimen with an angle of 2° preserved its anchoring performance up to
tensile failure whereas the specimen with an angle of 4°failed
in developing its maximum anchoring performance due to slip failure.