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Overestimation of Ultimate Tendon Stress in a Prestressed Concrete Beam with Unbonded Tendons
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 Title & Authors
Overestimation of Ultimate Tendon Stress in a Prestressed Concrete Beam with Unbonded Tendons
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 Abstract
The present study is to examine the ACI code equations for computing the unbonded tendon stress at flexural failure of prestressed beams. The equations examined for their validity are Eq. 18-4 and Eq. 18-5 of the ACI 318-95. Since the possibility of overestimation was expected with the equations, a numerical study, first, was carried out with influential variables included. From this study, it was found that amount of reinforcements, effective prestress, location of tendons, and loading type may affect the overestimation of the unbonded tendon stress. Then, an experimental study was carried out with those variables. A total of 8 specimens was tested to prove the theoretical findings as well as the effect of those variables. As a result. it was proven that the ACI Code equations can overestimate significantly the unbonded tendon stress for certain cases.
 Keywords
ACI Code equations;overestimation of tendon stress;prestressed concrete;unbonded tendon;
 Language
Korean
 Cited by
1.
Effects of Stressed and Unstressed Reinforcements on Prestressed Concrete Members with Unbonded Tendons,;;;;

KCI Concrete Journal, 2000. vol.12. 1, pp.131-138
2.
비부착 긴장재의 응력변화에 영향을 미치는 변수들의 상호관계에 대한 실험적 고찰,문정호;이선화;이창규;임재형;

한국콘크리트학회논문집, 2001. vol.13. 1, pp.62-68 crossref(new window)
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