ASDIP CONCRETE now includes a new module for one-way slab design per the latest ACI 318 provisions. But what is the required input data, and how do you check the calculations performed by the program in the output? This article shows a brief overview of this new module in ASDIP CONCRETE.
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Define the Geometry
Normally, a one-way slab spans between beams that run in the transverse direction at a regular spacing, but sometimes it may be supported on bearing walls. The thickness is generally controlled by the allowable deflections.
In the Geometry tab, ASDIP CONCRETE allows you to model up to five continuous spans and two end cantilevers. The end supports may be modelled as pinned or fixed.
In the right pane, the At-a-Glance tab shows a summary of the results, with the most relevant information such as bending shear, reinforcement, and deflections, as shown below. This view is intended to provide a quick overview of the design.
Define the Material Properties
Click on the Materials tab to enter the material properties, such as the concrete strength and density, reinforcing steel strength, and the stress-strain relationship.
In the right pane, the Condensed tab shows a detailed set of calculations, grouped by topic. This view is intended to provide detailed information about the results in a condensed format for deep checking, as shown below.
Specify the Loads
Enter the loads in the Loads tab. At the top of the page select either Pre-combined loads, or a set of load cases to be combined internally. ASDIP CONCRETE allows you to model uniform, variable, concentrated, and moment loads. The user interface has been designed to simplify these tasks as much as possible.
The Detailed tab shows a full set of step-by-step detailed results, with exposed formulas and references to the code, for a granular checking of the results, as shown below.
Specify the Reinforcement
The one-way slab should be reinforced with a set of continuous rebars at the bottom, and rebars at the top over the supports. If required, additional bottom rebars can be placed at the midspan. In addition, shrinkage and temperature rebars are required in the transverse direction. The software lets you specify the bar sizes and bar spacing at all of these locations.
ASDIP CONCRETE generate the shear and moment diagrams for all the specified load combinations. The diagrams can be shown by span and load combination, as shown below.
In addition, ASDIP CONCRETE generates the slab elevation view, showing all the reinforcing bars, for a detailed checking, as shown below.
ASDIP CONCRETE includes a new module for the design of one-way slabs spanning between multiple supports. With the friendly user interface, the design can be completed and optimized with ASDIP CONCRETE in minutes.
For our collection of blog posts about structural concrete design, please visit Structural Concrete Design.
Javier Encinas, PE
ASDIP Structural Software