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Structural analysis and design of conventionally reinforced, prestressed, and post-tensioned concrete floors, mats, and rafts.
Three-dimensional view of two-way distributed tendon system in RAM Concept showing line and point loads applied to slab.
RAM Concept is a software application for the structural analysis and design of conventionally reinforced and post-tensioned concrete floors, mats, and rafts. RAM Concept contains an advanced feature set that allows for the design of a wide variety of floor systems including post-tensioned, reinforced concrete and hybrid systems, elevated slabs and mat/raft foundations, one-way slabs, two-way slabs, beams, and joist systems. Here's an overview of RAM Concept's key capabilities:
Historically, the vast majority of concrete floors have been analyzed by approximating a region of a slab as a frame (or design strip), and then analyzing the frame/strip using variations of conventional frame or moment distribution analysis techniques. There are two limitations to this approach. First, in irregular structures, the approximation of the real structure into a frame model could be grossly inaccurate and designing with the analysis results might not even satisfy equilibrium requirements in the real structure. The second limitation is that even in regular structures with regular loadings, the frame analysis approximates the slab/column interaction and provides no information regarding the distribution of forces across the design strip.
RAM Concept enables the engineer to design post-tensioned and reinforced concrete slabs by using a finite element model of the entire slab. Concept can predict the elastic behavior of a slab much more accurately than frame models. In addition, the finite element method guarantees that the analysis satisfies all equilibrium.
RAM Concept has been used on projects of all sizes around the world. Below is a list of some notable structures on which the software played a key role in the structural design.
Shard at London Bridge Quarter, London, United Kingdom
Marina Bay Sands Integrated Resort, Singapore
Manchester Hilton, United Kingdom
K2 Business Park, Russia
RAM Concept's organization of criteria, input, and results through the layer system shown below allows a wealth of information to be organized cleanly for ease of navigation and user interaction.
Tree structure interface for navigating different input and results windows in RAM Concept. The results within each rule set (service, strength, ductility, etc.) can be investigated in detail.
RAM Concept allows the assignment of a priority value to any slab, beam, or opening in the model. This allows the engineer a simple but powerful means of reconciling overlapping elements within the floor.
Modeling plan layer with user assigned priority value for each element in the floor.
Resulting physical model once meshing has been done. Note the greater thickness of the beam framing from the left side of the column takes priority as it has a larger priority value.
One, two, and three-dimensional plots of virtually any demand, capacity, or response quantity can be drawn on screen.
Plot of flexural capacity and demand envelopes along design spans.
Three-dimensional color-coded plot of first mode of vibration.
RAM Concept in STRUCTURE Magazine
The January 2012 issue of STRUCTURE magazine features an article on the retrofit of a concrete-framed building in the State of Maine in which CFRP was used for slab strengthening. RAM Concept was used in evaluating the effects of proposed slab openings within the building. Click the following link to read the article: http://www.structuremag.org/Archives/2012-1/F-MaineHealth-Brenner-Jan12.pdf.
Practical Deflection Prediction of Concrete Slabs
RAM Concept Development Manager Jonathan Hirsch presented Practical Deflection Prediction of Concrete Slabs at the American Concrete Institute's Fall Convention on October 18, 2012, in Cincinnati, Ohio. A webcast of the presentation is available at http://www.concrete.org/education/Webcasts/Past-Webcasts.html. Click on the link entitled "Andy Scanlon Symposium, Part 4".
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