Where can I download the SHAPE‑MASSIVE program as a student version?
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KB 000674 | Defining Mandrel Diameter for Foundation Reinforcement in RF-/FOUNDATION Pro
Length 0:36 min
KB000610 | Automatically Dimensioning the Foundation Slab Geometry with RF-/FOUNDATION Pro
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KB 000605 | Setting the Concrete Cover in RF-/FOUNDATION Pro According to EN 1992-1-1
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Knowledge Base Articles

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Calculating Prestressed Hollow Core Slabs
Prestressed concrete slabs consist of composite, uniaxially stressed hollow plates with a width of about 1.20 m. These elements are prestressed with pre-tension in a precast concrete plant. The precasting is usually done with slipformers. Due to the lesser self‑weight of the non‑solid slab and the existing prestress, these precast prestressed hollow core slabs show a lesser deflection than loosly reinforced slabs made of solid concrete.
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Product Features Articles

SHAPE-MASSIVE | Stress analysis
- Normal stresses σx from axial force and bending
- Shear stresses τ from shear force and torsion
- Equivalent stresses σv with comparison to limit stress
- Stress ratios related to equivalent stresses
- Normal stress σx from unit normal force N
- Shear stress τ from unit shear forces Vy , Vz , Vu , Vv
- Normal stress σx from unit moments My , Mz Mu , Mv
Frequently Asked Questions (FAQ)
- How can I create a curved or arched section?
- How are the signs for the release results of a line release and line hinges interpreted?
- Is it possible to manually specify a longitudinal reinforcement for design in RF‑PUNCH Pro?
- Can I simulate the cracked state of a concrete cross-section for a bending beam with the "Isotropic Nonlinear Elastic 1D" material model?
- Why is the deflection of the reinforced concrete floor sometimes greater when selecting a larger basic reinforcement?
- I have a question about the message No. 47 in RFEM. What is the exact meaning of the word "integrate"? What is the resulting effect?
- How can I view the depth of the concrete compression zone in RF‑/CONCRETE?
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If I do not specify any basic reinforcement in RF‑CONCRETE Surfaces, I obtain the value X as an additionally required reinforcement. If I enter this value X as the provided basic reinforcement, I correctly do not get any additional required reinforcement.
However, if I enter a lower value than the determined required total reinforcement as the basic reinforcement, the additionally required reinforcement is increased in such a way that the originally required reinforcement content is exceeded. Why? - Why does the RF‑CONCRETE Surfaces add-on module not increase the amount of reinforcement until the SLS designs have a design ratio of 1.0?
- How can I get the member end forces to design the connections?
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