298x

2024-03-28

Not Valid/Deactivated Punching Nodes

Q: In the table of the objects to be designed in the Concrete Design add-on, punching nodes are listed in the not valid/deactivated column, although I have defined them as punching nodes. How can I fix this?

There can be several reasons for this error. Missing Surface Reinforcement In the surface with the punching nodes is no reinforcement available. You can find out how to create surface reinforcement here: Surface Reinforcement Missing Dimensions In RFEM 6, the geometry of punching nodes is usually determined using the cross-section of the connected structural component (wall, column). If a slab or a plate is designed separately within a 2D positional analysis and thus no walls or columns in the form of surfaces or members exist in the model, RFEM cannot automatically determine the structural component dimensions. In this case, it is necessary to manually enter the dimensions: Not Supported Nodes In the case of punching nodes that are not supported by a nodal nor linear support, the dimensions of the connected components can be defined via the ultimate configurations. More information can be found here: Ultimate Configurations (Punching) Supported Nodes In the case of punching nodes that are supported by a nodal nor linear support, which represent a connected component, you can specify the dimensions in the support settings. More information can be found here:Fictitious Columns (Nodal Supports) | Fictitious Wall (Line Supports) Not Valid Nodes In the punching nodes are located in the middle of a line load or a line support, no punching shear occurs. Therefore, these nodes are indicated as not valid.

In the table of the objects to be designed in the Concrete Design add-on, punching nodes are listed in the not valid/deactivated column, although I have defined them as punching nodes. How can I fix this?

Answer:

There can be several reasons for this error.

FAQ

FAQ 005472 | In the table of the objects to be designed in the Concrete Design add-on, punching nodes are...

FAQ 005472 | In the table of the objects to design in the Concrete Design add-on, punching nodes are listed in the not valid/deactivated column.

Not Valid / Deactivated Punching Nodes

Missing Surface Reinforcement

In the surface with the punching nodes is no reinforcement available.

Missing Surface Reinforcement

You can find out how to create surface reinforcement here: Surface Reinforcement

Missing Dimensions

In RFEM 6, the geometry of punching nodes is usually determined using the cross-section of the connected structural component (wall, column). If a slab or a plate is designed separately within a 2D positional analysis and thus no walls or columns in the form of surfaces or members exist in the model, RFEM cannot automatically determine the structural component dimensions. In this case, it is necessary to manually enter the dimensions:

Not Supported Nodes

In the case of punching nodes that are not supported by a nodal nor linear support, the dimensions of the connected components can be defined via the ultimate configurations.

Missing Dimensions – Not Supported Nodes

More information can be found here: Ultimate Configurations (Punching)

Supported Nodes

In the case of punching nodes that are supported by a nodal nor linear support, which represent a connected component, you can specify the dimensions in the support settings.

Missing Dimensions – Supported Nodes (Nodal Supports)

Missing Dimensions – Supported Nodes (Line Supports)

More information can be found here:
Fictitious Columns (Nodal Supports) | Fictitious Wall (Line Supports)

Not Valid Nodes

In the punching nodes are located in the middle of a line load or a line support, no punching shear occurs. Therefore, these nodes are indicated as not valid.

Invalid Nodes

Tip

After calculating the results for the Concrete Design add-on, the error messages for invalid punching nodes are displayed in the table.

Error Message Overview

Author

Mr. Gutmann provides technical support for Dlubal Software customers.

Do you have any questions?

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FAQ

FAQ 005472 | In the table of the objects to be designed in the Concrete Design add-on, punching nodes are...

Length: 00:00:00 min

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Punching Shear Design for All Section Shapes

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Calculation of Reinforced Concrete Slabs in RFEM 6

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Using an example of a steel fiber-reinforced concrete slab, this article describes how the use of different integration methods and of a different number of integration points affects the calculation result.

In order to correctly design a downstand beam or a T-beam in RFEM 6 using the Concrete Design add-on, it is essential to determine the flange widths for the rib members. This article describes the input options for a two-span beam and the calculation of the flange dimensions according to EN 1992-1-1.

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When calculating regular structures, data input is often not complicated but time-consuming. Input automation can save valuable time. The task described in the present article is to consider the stories of a house as single construction stages. Data is entered using a C# program so that the user does not have to enter the elements of the individual floors manually.

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If you want to use a pure surface model, for example, when determining the internal forces and moments, but the structural component is still designed on the member model, you can take advantage of a result beam.

Screenshots

Product Features

Feature 002670 | Fatigue Design According to EN 1992-1-1, Chapter 6.8

With the Concrete Design add-on, you can perform the fatigue design of members and surfaces according to EN 1992‑1‑1, Chapter 6.8.

For the fatigue design, you can optionally select two methods or design levels in the design configurations:

Design Level 1: Simplified design according to 6.8.6 and 6.8.7(2): The simplified design is performed for frequent action combinations according to EN 1992‑1‑1, Chapter 6.8.6 (2), and EN 1990, Eq. (6.15b) with the traffic loads relevant in the serviceability state. A maximum stress range according to 6.8.6 is designed for the reinforcing steel. The concrete compressive stress is determined by means of the upper and lower allowable stress according to 6.8.7(2).
Design Level 2: Design of damage equivalent stress acc. to 6.8.5 and 6.8.7(1) (simplified fatigue design): The design using damage equivalent stress ranges is performed for the fatigue combination according to EN 1992‑1‑1, Chapter 6.8.3, Eq. (6.69) with the specifically defined cyclic action Q_fat.

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The Concrete Design add-on allows you to perform the seismic design of reinforced concrete members according to EC 8. This includes, among other things, the following functionalities:

Seismic design configurations
Differentiation of the ductility classes DCL, DCM, DCH
Option to transfer the behavior factor from a dynamic analysis
Check of the limit value for the behavior factor
Capacity design checks of "Strong column - weak beam"
Detailing and particular rules for curvature ductility factor
Detailing and particular rules for local ductility

Feature 002654 | Design of Fiber-Reinforced Concrete

The Concrete Design add-on allows you to design fiber-reinforced concrete components according to the guideline "DAfStb Steel Fiber-Reinforced Concrete".

You can use this option for the design according to EN 1992‑1‑1. The design according to the DAfStb guideline is carried out once the concrete of the "Fiber Concrete" type has been assigned to the reinforced structural component.

Go to Explanatory Video

Feature 002652 | "Crosstie" Reinforcement Option for Design According to EN 1992-1-1

In the "Shear Reinforcement" tab, you can select the option "Cross-ties over free rebars with active selection in graphic". It allows you to arrange additional cross-ties on free rebars of the longitudinal reinforcement.

You can activate or deactivate the position of the cross-ties in the Info Graphic. The cross-ties are applied for the ultimate limit state design and the structural design checks. They are available for the design according to EN 1992‑1‑1.

Go to Explanatory Video

Frequently Asked Questions (FAQ)

Which products do you recommend for the structural analysis and design of reinforced concrete structures?

In the table of the objects to be designed in the Concrete Design add-on, punching nodes are listed in the not valid/deactivated column, although I have defined them as punching nodes. How can I fix this?

How can I generate an area load on members via cells in RFEM 6 or RSTAB 9?

How can I use graphic templates for multi printing of a reinforcement?

How can I activate the design with steel fiber-reinforced concrete in the "Concrete Design" add-on for RFEM 6?

How can I set user-defined points for result values on surfaces in RFEM 6?

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