Reinforcement Detailing of Beams from ETABS output

• Aim:

• To review the supplied Etabs model
• To gather design details of the model.
• Resolve the said issues in the model
• To follow suggested parameters.

• Procedure:

• We are going to review the supplied input.
• Input was already developed structural model of a G+4 building.
• So the supplied input was openend using the Etabs applicatio.
• And the model was reviewd.
• And as said the model was set to run the analysis.
• Thus run analysis is shown below

• And as said in the question we have taken said beams in consideration.
• The considered beams are shown below

Longitudinal reinforcement of the beam for Grid A

Longitudinal reinforcement of the beam for Grid 3

Shear Reinforcement of beam for Grid A

Shear Reinforcement of beam for Grid 3

• The obtained are the information of said beams.
• After this we are seeing the mid sapn failure of the beam in grid A.

• Here O/S means overstressed
• The stress has increased beyond the allowable value thats why it impossible to calculate here

• Torsion is minimum but shear for/ shear stress got increased

• Shear stress in load/area, We have to reduce the loading or increase the loading are the available suggestions as asked
• Shear capacity of the concrete, it varies according to the grade of concrete
• Instead of using M25 grade if used higher grade for this beam alone we can make the beam pass in the shear stress.

• For the calculation of maximum shear force .
• we are refering IS456-2002 clause 40.4
• And the formula is

V_us = (0.87fyA_svd)/S_v mm²

_Where

fy = 415N/mm²

A_sv = 151mm²

d= 450mm

S_v = 100mm

As per the observations from the drawing and IS Code

And

V_us = 245KN

• Result:

• The model was inserted.
• Resolutions were given.