# Reinforcement and formwork for complex shapes in Advance Concrete

The article describes how we can create reinforcement and formwork drawings for structures with a complex geometry, namely bridge abutment using Advance Concrete. The bridge abutment is a part of infrastructure which is created at the ends of the bridge in order to take the transmitted loads of the bridge superstructure and the supports of the access path to the bridge.

To define the chosen geometry, an ACIS block can be created or the complex geometry can be divided into several blocks having a simple geometry which can be assembled in order to obtain the initial model.

We chose the second method for reasons related to the flexibility of Advance Concrete while modeling volume elements.

How to create any 3D concrete shape

Advance Concrete provides the creation of any 3D and 2D shapes. The predefined concrete shapes can be chosen from the library or new ones can be created. To add a new concrete shape it is enough to create a closed contour and then save the shape in the concrete library. These new shapes can then be used either in the current drawing or for other projects.

The created concrete elements are defined as beam and column structural elements. These are positioned one in regard to the other, composing the entire concrete ensemble.

How to obtain a 3D reinforcement cage for special concrete shapes

The reinforcement drawing is created by selecting all the concrete elements. In the created reinforcement drawing, sections are added through the specific concrete zones.

The definition bars are created in one section and then distributed in elevation or top view. Several types of bars (straight, U and L bars) and distributions (linear, variable, multiple and quantitative) are available for use. The most frequent reinforcement bars are polygonal and straight bars and linear and variable distributions. Concrete covers can be set for each leg of the polygonal bar.

A reinforcement bar distributed in one view will automatically be available in all views, as long as the 3D power option is activated in the reinforcement drawing.

In order to obtain a correct reinforcement cage, the collisions between bars have to be avoided. The bar collisions can be visualized in 2D and 3D representations. They can be easily checked and corrected, at any point.

The bar detailing and reinforcement symbols can be done both manually (they can be customized and saved in the reinforcement symbol library) and automatically.

The bars numbering and lists creation is automatically done. Sub-entity marks are assigned for variable distributions, emphasizing that the variable distribution belongs to a single shape definition bar.

The drawings are created according to standard STAS 438/1,3 -89. The drawing creation according to other standards is similar.

Formwork details

The formwork drawing is created by adding the desired sections and elevations for structural elements, assigning specific hatches and line weights. The dimensioning of sections is quickly done by adding intersection and level dimensions.

Layout and Print

The reinforcement and formwork drawings can be placed in any page format. Also the views can be grouped and the title block can be attached according to the chosen format.

Numbering of the reinforcement bars and lists can be done in layout mode. The drawings can be printed one by one or by selecting several from the available print window.

Test it yourself

We have shown a simple example of a formwork and reinforcement cage created for a complex shape of the structural element. If you want to see the model described above, please download the specific model and drawings from here or, as a pdf file from here.

The example was created in Advance Concrete 2013.

This slideshow requires JavaScript.

# Why is ‘Copy 3D model’ powerful?

With the “Copy 3D model” option, Advance Concrete provides a more rapid and efficient work environment for the user to create reinforcement drawings. To create a complete reinforcement drawing involves not only creating the reinforcement bars, but also creating the symbols and the dimensions lines relative to the formwork.

Using the “Copy 3D model” option the user has the advantage of copying all the specific symbols along with the reinforcement bars. Another advantage is that the copied reinforcement bars are automatically displayed in all the other plan views. Using this option, the user creates a correct 3D model, avoiding many copy errors.

All the reinforcement bars must be created along with all the designated symbols and the formwork dimension lines. The “Copy 3D model” option can be used for all the similar structural elements from the drawing. The user must choose a reference point and then copy the multiple entities for each structural element.

The following figure shows a reinforcement drawing for a wall with an opening. The reinforcement plan contains reinforcements, reinforcement symbols, dimension lines and altitude symbols.

For the reinforcement of the walls for the rest of the stories, the “Copy 3D model” option was used. The user selected all the reinforcement bars, reinforcement symbols, dimensions lines and all the altitude dimensions. The 3D copy allows the user to create the 3D reinforcement assembly avoiding all the errors that can occur when using the AutoCAD “Copy” option. In addition, by using this option, the user instantly creates the definition bars and the corresponding distribution bars.

In conclusion, by using the “Copy 3D model” option, the user can create reinforcement drawings in a shorter amount of time because the manual insertion of the symbols and dimension lines is avoided. Also the reinforcement 3D model is correctly created.

Creation of the reinforcement drawing is an important step in designing reinforced concrete buildings, which usually involves a lot of time, patience, skills and responsibility, as the created drawings should comply with specific standards.
Advance Concrete has a new reinforcement solution, easy to use in projects, so that the time spent for reinforcement drawing creation is considerably reduced.

1. Predefined dynamic reinforcement solutions

• Cantilever beams
• Columns (stirrups and pin bars)
• Door and window openings
• Wall between two columns
• Plain wall between walls

2. Flexibility in defining new dynamic reinforcement solutions

• A user friendly environment for reinforcement solution design
• Various tools for the creation of all reinforcement elements necessary for the reinforcement cage
• A wizard for saving the dynamic reinforcement solution

3. Easy to use

• Automatic creation of a drawing from a set of structural elements. The drawing contains predefined views
• Saving the reinforcement solution in an interactive mode

4. Reusing the reinforcement solutions
All reinforcements put in place using the “Dynamic Reinforcement” automatically adapt to formwork contours and can be taken into account in reinforcement drawing creation and lists.

5. 3D View
Based on the reinforcement representation in the views of the reinforcement drawing, Advance Concrete recreates the cage and displays it in 3D. It also detects collisions.

Benefits

• The dynamic reinforcement solutions can be easily used in projects, so that the time spent for reinforcement drawings creation is considerably reduced. Common tasks, frequently encountered during the project development are simplified and reduced to simple parameter value input.
• Once defined and saved, the dynamic reinforcement solutions can be applied in other projects; this minimizes the risk of errors and guarantees compliance with design rules and standards.
• The drawings are kept up-to-date when projects are modified, and the risk of errors is considerably reduced.

Advance Concrete provides advanced reinforcement solutions, useful in designing reinforced concrete buildings so that the time spent for creation of the reinforcement drawings is considerably reduced.

Nowadays, many private or office buildings are built using load bearing walls as main supporting elements. In a vertical plane, the load bearing walls have a large capacity of processing gravitational loads, which recommends them for buildings with several levels, in seismic areas. On the other hand, in a perpendicular direction on the wall plane, the load bearing walls provide small resistance to horizontal forces and usually are supported by perpendicular walls or similar structures.