A simple supported unidirectional slab with a thickness of 250mm and a protective layer thickness of 25mm.
The concrete strength grade is C30, and the steel reinforcement is HRB400.
Modeling and loading are shown in Figure 1.
The right end of the board is a sliding support, and the left end is a hinged support.
The sliding end applied a certain axial force and a certain uniformly distributed surface load on the plate.
As shown in Figures 2 and 3, the manually calculated reinforcement area is 7.
608mm2, while the SAP2000 concrete shell reinforcement result is 2.
038mm2.
The difference between the two is significant.
Why is this?.