Post-tensioned slabs are tested in order to investigate the tendon stress at ultimate limit state in case of using bonded and unbonded tendons. The main objective is to compare the values of the mentioned tendon stress to those predicted by ACI 318-19 based on empirical equations for unbonded tendons and based on strain compatibility for bonded ones. The experimental program will be carried on six one-way slabs in four-point flexural loading. Details of the tested slabs and the test set up are presented in this paper. The results of the test carried showed an excellent correlation where almost all of the slabs experimental test results were equal to the theoretical results with a very minor difference around 10 percent.
Post-tensioned slabs are tested in order to investigate the tendon stress at ultimate limit state in case of using bonded and unbonded tendons. The main objective is to compare the values of the mentioned tendon stress to those predicted by ACI 318-19 based on empirical equations for unbonded tendons and based on strain compatibility for bonded ones. The experimental program will be carried on six one-way slabs in four-point flexural loading. Details of the tested slabs and the test set up are presented in this paper. The results of the test carried showed an excellent correlation where almost all of the slabs experimental test results were equal to the theoretical results with a very minor difference around 10 percent. Also, the accuracy of the ACI 318-19 equation for the calculation of the unbonded tendon's ultimate stress is investigated and the equation has been proven to be accurate.
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