| Product(s): | RAM Elements | ||
| Version(s): | Any | ||
| Environment: | N/A | ||
| Area: | Design | ||
| Original Author: | Bentley Technical Support Group |
For additional information see Ram Elements - Tilt Up Wall [FAQ]
How is Tilt-up wall design checked in ACI 318-14?
According to section 11.4.1.3 Slenderness effects shall be calculated in accordance with 6.6.4, 6.7 or 6.8. Alternatively, out-of-plane slenderness analysis shall be permitted using 11.8 for walls meeting the requirements of that section.
Ram Elements Tilt-up wall module only checks slenderness effects using the alternative method in Section 11.8 and consequently any walls that do not meet the requirements of 11.8.1.1 will have warnings in the output. For example:
“The wall must be tension controlled, Section 11.8.1.1b” - Where there is too much compression the tension strain is limited and this warning can occur..
“Insufficient reinforcement to resist cracking moment, Section 11.8.1.1c” - This indicates that Mcr > phi Mn. Additional reinforcement or larger bars should resolve this.
“Excessive vertical stress, Section 11.8.1.1d” - This indicates that Pu>0.06f’cAg which cannot easily be resolved other than making the wall thicker (assuming the Pu is correct).
Tilt-up walls can also be checked as shear walls.
Alternatively the wall can be evaluated as a Concrete Wall using the Concrete Wall Module rather than the Tilt-up wall module.
See Also
Ram Elements - Tilt Up Wall [FAQ]
[[Tilt-up wall analysis error for inactive DOF]]
