Answer:
For surfaces with a variable surface thickness, RF‑PUNCH Pro iteratively determines the lowest static depth d along the critical perimeter and applies it on the safe side along the entire perimeter for the design.
Question
Which static depth d is applied in RF‑PUNCH Pro for design on surfaces with a variable thickness?
Author
Mr. Kieloch provides technical support to our customers and is responsible for development in the area of reinforced concrete structures.
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In RF-PUNCH Pro, you can perform the punching shear design on wall corners and wall ends. The basis for the design is the punching load, which is automatically determined from the RFEM internal forces in the connected surface. Since the surface internal forces from the RFEM calculation may be subject to the influence of singularity locations, this can also have a negative influence on the determined punching load at the wall corner or end. This article describes possible optimization options that you can use to minimize this unfavorable influence.
In RF-PUNCH Pro, enlarged column heads can be arranged at point-supported punching shear points, thus increasing the shear force resistance of a reinforced concrete floor. In the following article, we will show the punching shear design with the optional application of an enlarged column head.
RF-PUNCH Pro performs punching shear design on concentrated load application locations (column connection, nodal support, and nodal load) as well as on wall ends and wall corners.
With RF-PUNCH Pro, the punching shear design can be performed according to 6.4, EN 1992-1-1. In the following example, the design according to DIN EN 1992-1-1 will be presented first with automatic design of the inner and outer perimeters and then on the basis of the inner perimeters defined by the user on a simple example.
![Dialog Box "Edit Wall" with Specification of Width "t" in [mm]](/en/webimage/019339/3371420/faq4637-02-en-us.png?mw=350&hash=12b1e89932c586ce4252df4a31c61a3d2219ef62)
In the RFEM add-on Surface Concrete Design allows you to perform the fire design according to the simplified table method (EN 1992-1-2, Chapter 5.4.2 and Table 5.8 and 5.9) for walls and ceilings made of reinforced concrete.
In the Concrete Design add-on, you have the option to define an existing vertically oriented punching shear reinforcement. This is then taken into account in the punching shear design.
Do you have individual column sections and angled wall geometries, and need punching shear design for them?
No problem. In RFEM 6, you can perform punching shear design not only for rectangular and circular sections, but for any cross-section shape.
The Concrete Design add-on provides you with the option to perform the simplified fire resistance design according to EN 1992‑1‑2 for columns (Section 5.3.2) and beams (Section 5.6).
The following design checks are available for the simplified fire resistance design:
- Columns: Minimum cross-sectional dimensions for rectangular and circular sections according to Table 5.2a as well as Equation 5.7 for calculating time of fire exposure
- Beams: Minimum dimensions and center distances according to Table 5.5 and Table 5.6
You can determine the internal forces for the fire resistance design according to two methods.
- 1 Here, the internal forces of the accidental design situation are included directly into the design.
- 2 The internal forces of the design at normal temperature are reduced by the factor Eta,fi (ηfi), then used in the fire resistance design.
Furthermore, it is possible to modify the axis distance according to Eq. 5.5.
I have installed Halfen HDB 13.60 on my PC. The version does not seem to be compatible with RF‑PUNCH Pro anymore. The interface does not work. I am using version 5.26.02 of RFEM.
What defines the dimensions "Length of Reinforcement" and "Width of Reinforcement" of the longitudinal reinforcement in RF‑PUNCH Pro? Is the anchorage length included?
Where in RF‑PUNCH Pro is the direction of the individual reinforcement layers displayed?
When should the punching load be determined with the (un)smoothed distribution of the shear forces at the critical perimeter?
How can I graphically display the determined load increasing factors ß from the RF‑PUNCH Pro calculation?
I would like to perform punching shear design on a column with downstand beams as a wall corner or wall end. However, the module applies an internal column. Is it possible to adjust it?
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