PSI - Issue 60

Swathy S et al. / Procedia Structural Integrity 60 (2024) 591–603

602 12

Swathy S et.al / Structural Integrity Procedia 00 (2019) 000 – 000

(c) SP3-SBL Fig 14 Deformation of all the tested slab

4. Expected formula for critical section and capacity As per IS 456:2000, The nominal shear is given as = Ꞇ v = V u

--------------- ______ (1) 4bd

Designed shear strength = K s Ꞇ c where k s = 1+ β c subjected to maximum of 1

where β c = L 1 / L 2 As per BS 8110,

k s = (400/d) ________ (2) The area of tension steel is calculated by using ultimate moment formula as per IS 456:2000. Spacing s = a x 1000 (3) ----------- A st M u = 0.87 f y A st d [1- A st f y ] (4) ---------- bd f ck 5. Conclusion The experimental investigations were concluded with studying the load carrying capacity and cracking behaviour of the three strengthened specimens. 1. Compressive strength of concrete cube with addition of polypropylene fibre is around 7.18% higher than the compressive strength of cube without addition of fibre. The addition of polypropylene fibre increases in ductility and it will reduce the formation of retraction and contraction crack formation. 0.25 , k < 1