How to perform nonlinear cracked analysis of floor system in ETABS?
Below are the steps how to set up and run floor cracking analysis in ETABS v19 ultimate license level:
1- Define > Load Cases... and Add New Load Case... of type Nonlinear Static. Click on Modify/Show Floor Cracking Analysis and update Floor Cracking Analysis Parameters
2- Select the floor(s) and beam(s) and go to Assign >Shell > Floor Cracking... and Assign > Frame > Floor Cracking... to consider Selected Floor(s)/Beam(s) in Floor Cracking Analysis
3- Define Reinforcement Options for Cracking Analysis via Analyze > Cracking Analysis Options...
4- Define Modulus of Rupture for Cracked Deflections via Define > Material Properties...
5- First run analysis for the linear load cases that are part of the design load combinations and perform concrete slab design and concrete frame design. Then set the nonlinear cracked analysis load cases not to run via Analyze > Set Load Cases To Run... Design must be run at least once before running the nonlinear cracked analysis load cases otherwise minimum rebars will be used.
6- After design is completed and deemed acceptable, go Analyze > Set Load Cases To Run... highlight and run the nonlinear cracked analysis load cases
See Also
- Cracking article
- SAFE Cracked Section Analysis article
- Cracking FAQ article