Reinforcement Detailing of Beams from ETABS output

CHALLENGE - 7

ANSWERS

1. AIM & INTRODUCTION:

• To Know the design of RC beam using ETAB analysis.
• To know the basics of beams reinforcement details with respect to primary standards.
• To ensure the ductility reinforcement required as per IS 13920-2016 has been satisfied in ETAB design.

LONGITUDINAL REINFORCEMENT OF BEAM AT GRID A – A (mm2)

SHEAR REINFORCEMENT OF BEAM AT GRID A – A (cm2/1000mm)

LONGITUDINAL REINFORCEMENT OF BEAM AT GRID 3 – 3 : (mm2)

SHEAR REINFORCEMENT OF BEAM AT GRID 3 – 3 (cm2/1000mm):

2.BEAM ELEVATION SHOWING THE LONGITUDINAL AND SHEAR REINFORCEMENT

3.SWAY SHEAR FORCE TO RIGHT

Vu,a = 87

M_a,h = 293

M_b,s = 174

Lab = 5.375

V _u,a D+L = 87,92

V_u,a = 87 – 1.40x [174+293]/5.375

= 34 KN

V_u,b = 87 + 1.40x [174+293]/5.375

= 208

SWAY SHEAR FORCE TO LEFT

Vu,a = 92

M_a,h = 300

M_b,s = 165

Lab = 5.375

V_u,a = 92 – 1.40x [300+165]/5.375

= 29 KN

V_u,b = 92 + 1.40x [300+165]/5.375

= 213 KN

Checking with IS code 456:2000 Clause : 40.4 for shear reinforcement.

V_us = 0.87.f_y.A_sv.d/S_v

= 0.87x415x3x50x450/100

= 243709 N

= 243.71 KN

Hence provided shear 243.71 > 213 KN.

Satisfied with requirement.