DOI: 10.5176/2301-394X_ACE18.200
Authors: Kim, Jee-Sang Jo, Young Jae, Yoo, Kyung Suk and Woo, Byeong Hun
Abstract:
In the anchorage zones of post-tensioned concrete members, large tensile forces are introduced which cause cracks such as bursting force, spalling force and longitudinal edge tension force.When the post-tensioning method is applied by using high strength concrete, it is expected that it may be possible to reduce the cross sectional dimensions and the amounts of reinforcements used. In this paper, the longitudinal displacement, reinforcement stress and crack width were evaluated experimentally through load transfer test of 80, 100, and 120MPa high strength concrete. It was shown that the cracking load, the crack width, and the reinforcement stress estimated according to the current Korean Design Code underestimated the performance of the post-tensioned anchorage zones using high strength concrete. Therefore, the new design standard reflecting the characteristics of high strength concrete is needed.
Keywords: Post-tensioned concrete; Anchorage zones; High strength concrete; Crack width
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