Shell reinforcement design

Legacy Information:

As of SAP2000 V14.0.0, shell reinforcement design is based on Eurocodes. The content of this article will be updatedaccordingly.

The formulation for reinforcement design is based on the following publications:SAP2000 shell

Brondum-Nielsen, T. (1974). , , Technical University ofOptimum Design of Reinforced Concrete Shells and Slabs Report NR.R 44Denmark, Copenhagen, Denmark.

Marti, P. (1990). , (2), 180-190.Design of Concrete Slabs for Transverse Shear ACI Structural Journal, 87

The formulation is documented in the technical note Concrete Shell Reinforcement Design, available through Help > Documentation > TechnicalNotes > Concrete Shell Reinforcement Design.

Setting shell design parametersDefault shell design parameters, such as rebar cover, may be modified through Define > Section Properties > Area Sections, as shown in Figure1:

Figure 1 - Set default shell design parameters

Reviewing resultsAfter analysis is run, design parameters may be reviewed through Display > Show Forces/Stresses > Shells by selecting the component typeConcrete Design, as shown in Figure 2:

Figure 2 - Review design parameters

ASt1 represents reinforcement in the 1 direction of the , and ASt2 is in the 2 direction. The reinforcement calculated for either the top orshellbottom face of the shell object may be displayed separately, as shown in Figure 3:

Figure 3 - Reinforcement for top or bottom surface and orientation