| 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 Section 11.8 - Alternative method for out-of-plane slender wall analysis, 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]]
