Reinforcement Detailing of Beams from ETABS output

Details Of Reinforcement

Provide reasons for failure of the middle span along grid A. What are the possible ways this issue can be resolved?

Beam failed because of excess shear stress at support, there are several possible ways to make it pass first of all we can increase the area of a beam or increase the grade of concrete in that particular beam.

Existing Shear Capacity in Beam As per Drawing

Fy = 415 N/mm2
Asv = 151 mm2
d = 450 mm
sv = 150 mm

Vus = 245 kN

According to Sway Shear to Right
Vua = 48 kN
Vub = 232 kN

According to Sway Shear to Right
Vua = 277 kN
Vub = 43 kN

Hence Safe in Shear.