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Marcus's method is a structural analysis used in the design of reinforced concrete slabs.The method was developed by Henri Marcus and described in 1938 in Die Theorie elastischer Gewebe und ihre Anwendung auf die Berechnung biegsamer Platten. [1]
The Wood–Armer method is a structural analysis method based on finite element analysis used to design the reinforcement for concrete slabs. [1] This method provides simple equations to design a concrete slab based on the output from a finite element analysis software.
This can yield time savings of up to 40% compared with traditional solid slabs. [1] However, this is heavily dependent on the particular system, and systems relying on onsite placement of void formers requires much more labor than solid slabs. [2] Compared to one-way hollow-core slabs, biaxial slabs are more resistant to seismic disturbance.
A two-way slab has moment resisting reinforcement in both directions. [24] This may be implemented due to application requirements such as heavy loading, vibration resistance, clearance below the slab, or other factors. However, an important characteristic governing the requirement of a two-way slab is the ratio of the two horizontal lengths.
The underside of a waffle slab, showing the grid like structure. A waffle slab or two-way joist slab is a concrete slab made of reinforced concrete with concrete ribs running in two directions on its underside. [1] The name waffle comes from the grid pattern created by the reinforcing ribs.
The Manitoba Hydro Spillway Replacement was designed using Tekla Structures to "successfully model and co-ordinate its design", a project that won the TEKLA 2012 North American BIM Award for "Best Concrete Project". [19] It was the "first hydroelectric project that has seen steel, concrete, and rebar fully detailed using Tekla Structures". [20]
The strength enhancing effects of arching action in reinforced concrete floors were first recognised near the beginning of last century. [1] However, it was not until the full scale destructive load tests by Ockleston [2] [3] on the Old Dental Hospital in Johannesburg that the extent of strength enhancement caused by arching action was really ...
Waffle slab foundations adhere to International Building Code requirements. By 2008, most states put into effect the changes adopted in the 2006 IBC and, in regards to foundations, the on-grade mat foundation has become a more attractive design because, as an engineered system, it already accommodates the 2008 design recommendations, and required no major modifications to bring it into compliance.