Reinforcement Detailing of Beams from ETABS output

Longitudinal Reinforcment

Shear reinforcment

Longitudinal Reinforcment

Shear Reinforcement

Reason of Failure of Middle Span

O/s - Overstressed

This means stress for particular beam has been cross the allowable limit, due which shear force or shear stress increased.

Possible ways solve the problem-

1. As Shear = load / area

Increase the loading or decrease the loading

2. by Increasing shear Capacity

as we know the shear capacity varies with grade of concrete, if we use the higher grade of concrete for particluar beam then shear capacity increased which leads to increase shear stress.

Mas = 174 KNm, Mbh= 293KNM, Lab= 4.725m, Vd+1=92KN

Mah= 234 Knm, Mbs= 155 Knm, Lab=4.725m, Vd+1= 70KN

Vua= 46KN Vua= 185 KN

Vub = 230KN Vub=45 KN

Fy= 415 Kn/mm2

Asv=151 mm2

d= 450mm

Sv= 100 mm

Vus = 245KN