Abstract
Post-Tensioned (PT) method is a widely used technique to prevent cracking and to minimize the deflection which is resulted by loads. In this method, stress is applied after concrete placing and reach adequate hardening and strength. This paper investigates the structural behaviour of PT two-way concrete slabs. The main objective of this study involves a detailed flexural behavior analytical investigation of PT concrete two-way slab with the different bonded tendon layout. This will be achieved by non-linear Finite Element (FE) analysis programs method, to choose the most effective and optimum position of tendon layout with different number of tendons and applied load on the concrete two-way slab. A parametric study was conducted to investigate the effect of tendons layout on the overall behavior of post-tensioned two-way concrete slab. The result obtained from finite element analysis showed that the failure load in PT in both directions increased about 89 % as compared with slab PT in one direction.
Highlights
Concrete is a structural engineering construction material used by different methods
The nonlinear Finite Element (FE) analysis was achieved to find the optimum layout of the tendon
PT has a strong effect on failure load of the slab, a various number of tendons used in one direction and for both directions, at first only one tendon used and after that number of tendon increased, analysis results showed that tendon has a good effect for strengthening slabs and reducing cracks
Summary
Concrete is a structural engineering construction material used by different methods. A collection of studies by several researchers explains the FE analysis of the behavior of reinforced concrete structures such as shear failure of slabs, cyclic loading of columns, and the behavior of structure to seismic and bond models between concrete and steel. The authors studied the effect of various tendon profiles on the bonded PT reinforced concrete cantilever beam flexural behaviour. Very few studies exist in literature related to the effect of tendon layout on the behaviour of PT two-way concrete slabs especially the numerical analysis. The developed model was validated with prior experimental work conducted by Kim and Lee [2] and was used to study the effects of the tendons layout on the behavior of bonded posttensioned two-way concrete flat slabs. This work was studied the parameters that affect the overall behaviour of PT two-way concrete slab such as tendons layout
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