RF-CONCRETE Surfaces Version 5

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RF-CONCRETE Surfaces Version 5

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1.1 Add-on Module RF-CONCRETE Surfaces

Although reinforced concrete is as frequently used for plate structures as for frameworks, standards and technical literature provide rather little information on the design of two-dimensional structural components. In particular, the design of shell structures that are simultaneously subjected to moments and axial forces is rarely described in reference books. Since the finite element method allows for realistic modeling of two-direction objects, design assumptions and algorithms must be found to close this "regulatory gap" between member-oriented rules and computer-generated internal forces of plate structures.

DLUBAL SOFTWARE GMBH meets this challenge with the add-on module RF-CONCRETE Surfaces. Based on the compatibility conditions defined by Baumann [Deutscher_Ausschuss_Stahlbeton] in 1972, a consistent design algorithm was developed for the dimensioning of reinforcement directions consisting of two and three layers. The add-on module is more than just a tool for determining the statically required reinforcement: RF-CONCRETE Surfaces also includes regulations concerning the allowable minimum and maximum reinforcement ratios for different types of structural components (2D plates, 3D shells, walls, deep beams), as they can be found in the form of design specifications defined in the standards.

In the determination of reinforcing steel, RF-CONCRETE Surfaces checks if the concrete's plate thickness, which stiffens the reinforcement mesh, is sufficient to meet all requirements arising from bending and shear loading.

In addition to the ultimate limit state design, the serviceability limit state design is possible, too. These designs include the limitation of the concrete compressive and the reinforcing steel stresses, the minimum reinforcement for the crack control, as well as the crack control by limiting rebar diameter and rebar spacing. For this purpose, analytical and nonlinear design check methods are available for selection.

If you also have a license for RF-CONCRETE Deflect, you can calculate the deformations with the influence of creep, shrinkage, and tension stiffening according to the analytical method.

National Annexes to EN 1992-1-1
National Annexes to EN 1992-1-1

With a license of RF-CONCRETE NL, you can consider the influence of creep and shrinkage in the determination of deformations, crack widths, and stresses according to the nonlinear method.

The design is possible according to the following standards:

  • EN 1992-1-1:2004/A1:2014
  • ACI 318-14
  • CSA 23.3-14 (R2015)
  • SIA 262:2013
  • GB 50010-2010

The figure on the left shows the National Annexes to EN 1992-1-1 that are currently implemented in RF-CONCRETE Surfaces.

All intermediate results for the design are comprehensively documented. In line with the philosophy of Dlubal Software, this provides a special transparency and traceability of design results.

We hope you will enjoy working with RF-CONCRETE Surfaces.

Your Dlubal Team