Reinforcement Detailing of Beams from ETABS output

Challenge 7: Reinforcement Detailing of Beams from ETABS output

AIM:

• To carry out the analysis of the given Etabs model and to design the RCC moment resisting frame.
• To provide the detailing of longitudinal and shear reinforcement for two continuous beams.
• To provide the reasons of failure of middle span along grid A.

INTRODUCTION:

• Beams are horizontal structural elements that support lateral loads and are used to support lateral loads.
• Beams in traditional reinforced concrete structures are typically loaded by the floor slab, but they may also be subjected to additional loads such as wall loads, service installation, and so on.
• The selection of the right beam size and the quality of longitudinal and shear reinforcement that will fulfil ultimate and serviceability limit state requirements are all part of the design and detailing of RC beams.
• After that, it's critical that the beam reinforcements are appropriately positioned and arranged on site to avoid building mistakes.

PROCEDURE:

Open the ETABS file provided to us.

Now check the load combinations which are already provided as shown.

Check the model for errors. For that click on Analyse tab and select Check Model and no errors message was shown as below.

Click on Start Design/Check option in order to start beam design

After the above process is completed click on display design info option and the dialogue box shown below will appear and select the Longitudinal Reinforcing option and click OK.

The longitudinal reinforcement results appears as follows

• The detailing of grid A and grid 3 continuous beams must now be completed.

As per clause 6.3.3.3 provide 3 legged stirrups of 10mm dia with 95mm spacing throughout the beam length.

As per clause 6.3.3.3 provide 3 legged stirrups of 8mm dia with 100mm spacing throughout the beam length on both sides and provide 3 legged stirrups of 8mm dia bars with 150mm spacing at mid span.

Reason for failure of the mid span along grid A:

The beam have failed due to the weak shear Reinforcement as the high Shear force was acting on the beam

RESULTS:

The beam detailing and designing was carried out with the help of ETABs and AutoCAD software.