Reinforcement Detailing of Beams from ETABS output

Aim : Detailed design of concrete buildings -1

Detail design of beams in Etabs 2018.
The ETABS file for a G+4 building is provided. Run the analysis and design the RCC Moment ResistingFrame. The following challenge deals specifically with two continuous beams in the 1st floor.

        1) 3 span continuous beam along grid A
        2) 7 span continuous beam along grid 3

Address the following issues thereafter.
        • Provide details of longitudinal and shear reinforcement for the two continuous beams. Sketch the beam elevation details or draft it using autocad software. A sample of how beam elevation details is prepared in consultancy firms is provided below. Participants can prepare it as per their preference:

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

• Calculate value of the maximum shear force in any one of the spans in both the continuous beams, as per clause 6.3.3 (b) in IS 13920 – 2016. Also, confirm these values from shear force demand calculated by ETABS.Please note that if longitudinal reinforcement provided is more than required (as per ETABS results), the shear force demand will vary from what is provided by ETABS.

ANSWER 

• There are some rules of detailing reinforcement concreate member :
• The Reinforcememnt of shrinkage and temperature aremimimum
• The Reinforcement required for limiting crack width.
• The requirment Ulimate state design reber.
• Requirment Ductility reber.
• . Minimum longitudinal reinforcement as per IS-13920-2016 clause 6.2.1 A 360 mm2
• Minimum shear (or) transverse reinforcement as per IS-456-2000 clause 26.5.1.6 (Assuming 1000mm spacing in the formula) A = 332 mm2
• Development length as per IS-456-2000 clause 26.2.1 L, 41 x diameter of bar

ETABS DESIGNING

PROCEDURE: