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***************************