D10.A.9 Slab Design
Slabs are designed per Mexican NTC specifications. To design a slab, it must be modeled using finite elements.
Element design will be performed only for the moments MX and MY at the center of the element. Design will not be performed for FX, FY, FXY, MXY. Also, design is not performed at any other point on the surface of the element. Shear is checked with Q.
A typical example of element design output is shown below. The reinforcement required to resist Mx moment is denoted as longitudinal reinforcement and the reinforcement required to resist My moment is denoted as transverse reinforcement. The parameters FYMAIN, FC, CLB, CLS, CLT, DIM, and EXP listed in D10.A.4 Design Parameters are relevant to slab design. Other parameters mentioned are not used in slab design.
Element moments: Longitudinal (L) and Transverse (T)
D10.A.9.1 Example Output for Element Design
ELEMENT DESIGN SUMMARY ---------------------- ELEMENT LONG. REINF MOM-X /LOAD TRANS. REINF MOM-Y /LOAD (SQ.MM/MM) (KN-MM/MM) (SQ.MM/MM) (KN-MM/MM) 47 TOP : Longitudinal direction - Only minimum steel required. 47 TOP : Transverse direction - Only minimum steel required. 47 TOP : 0.205 0.00 / 0 0.205 0.00 / 0 BOTT: 0.254 10.44 / 1 0.362 13.35 / 1 47 SHEAR CAPACITY 57.06 KN ***PASS*** FOR LOAD CASE 3 ***** INDICATES REINFORCEMENT EXCEEDS MAXIMUM ***************************END OF ELEMENT DESIGN***************************