![]() The use of unbonded tendons began in the United States at the beginning of the 1950s and has been used to a great extent since when constructing parking garages and floors. The layout with all tendons concentrated also has the best results in terms of deflections.īoth unbonded and bonded tendons can be used to construct pre-stressed concrete flat slab/plates. ![]() Results from the analysis show that, when a higher portion of tendons is concentrated instead of distributed, stresses caused by other structural loads are counteracted best. Ultimate bending moment of resistance was calculated theoretically for different layouts and compared. Short-term/long-term deflection and stress due to service load obtained from the computer programs has also been compared, to highlight the differences. Hence, this study focuses on the analysis of three different six-panel flat plates (i.e., panel sizes: 6 m × 6 m, 9 m × 6 m and 11 m × 6 m) with five different tendon layouts, using computer programs ADAPT-Floor Pro and FEM-Design 17, based on linear finite element (FE) analysis. ![]() ![]() It is vital to compare the structural response (i.e., deflection and stresses) and the clashing of tendons of the proposed tendon layouts in the literature to select an appropriate layout. For post-tensioned flat slab/plates, different tendon layouts have been discussed in the literature. Post-tensioned unbonded tendons are widely used in flat slabs/plates when there is a demand for large span lengths, durable tendons and a reduction in the weight of structure.
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