The model represents a concrete structure with a steel platform attached. There are two slabs with a vertical offset between them. The slabs are supported by three concrete walls and one column. One surface has a T-beam integrated at a free edge. All the surfaces are rigidly connected.
The adjacent platform is supported by a frame construction at its remote end. Since the platform girders are pin-connected to the slab and frame, they do not transfer any bending moments.
Materials, Thicknesses, and Sections
For the materials, concrete f’c = 4000 psi and steel A992 are used for the structural model.
The thickness of the floors and walls is 8.0 in each. The concrete column in the center of the model consists of a circular section 12.0 in in diameter. For the downstand beam, a rectangular section 12.0 in wide by 16.0 in deep is used. The steel frame consists of W8x31 sections, whereas the platform girders are made of W8x18 sections.
Loads
The loads are applied through four load cases (LC).
LC1 includes the self-weight of the model and the weight of the floor on the slabs, which is 15.0 psf.
In LC2 through LC4, the live loads are defined. Those are category A loads of 30.0 psf each and are applied separately to the two slabs and the platform.