Allplan Engineering and Allplan Precast are both 3D modelling and detailing software in the Nemetschek portfolio with a strong focus on the concrete engineering industry. Data-exchange with other software is very easy when using the IFC protocol. Just save your model as an IFC-file and import it in any other IFC-certified software
The Allplan model
Following model was set up in Allplan Engineering using standard architectural objects such as beams, columns and slabs.
For detailing purposes and preparation of the manufacturing, the model was then sent to Allplan Precast, where the slabs were converted into precasted flooring elements and the columns got all the necessary bits and pieces for a fast erection of the final building.
Structural analysis of the model can be done at any stage of the project, whether it's in the conceptual phase or even in the final design stage to check any last minute modifications on the model.
In this example we will send the Precast-ready model to Scia Engineer for structural analysis.
Quality Assurance in Solibri
Before we import the model in Scia Engineer, we do a quick check in Solibri
Import in Scia Engineer
This file can be imported in Scia Engineer. Make sure the material mapping table is up to date in case of exotic material denominations
Precast objects are based on 3D solids, so here we need to elaborate the model a little lit. Converting into analysis objects and aligning the structure are however tasks which are always required to ensure proper structural analysis.
Elaborating the model
We convert all elements, except for the foundation blocks, into analysis objects. You can do some additional layering to facilitate the works, but that's strictly personal taste.
First we have a look at the frame structure and convert it into analysis objects
Next step is aligning the nodes by means of the BIM Toolbox
The flooring elements are probably designed based upon their most critical area in the slab. It does not make much sense to convert them into beam-like entities. We can however transfer the load in the floor to the frame structure by means of load panels. The software will then take care of the distribution of the surface loads on these panels and apply them onto the proper supporting beams.
Following images represent the deformations and internal forces in the structure for load case 2 (service load)
Using the calculation results in Allplan
How to deal with geometrical changes is already discussed in the Scia Engineer & Tekla use case.
We can compare the original model with the revised model in Solibri Model Checker and produce a brief report of all the modifications to be processed. It's up to the Allplan modeller to make sure all the required changes are introduced in his model, ensuring all the construction details remain valid.
But we can use some of the calculation results directly in Allplan. The calculated theoretical reinforcement is one of those.
Let's store the Scia Engineer isobands for theoretical reinforcement as ASF-files and import them in our Allplan model.
These values wan be displayed and will provide direct feedback for the modeller when designing practical reinforcement.
The practical reinforcement which is added to the model in Allplan will be matched with the required amount of reinforcement.
The isobands take this actual reinforcement into account and will be updated.
As an example we add a base layer of meshes (Q257 = Ø7/Ø7/150/150 mm).
You can clearly see the color scheme change and indicate the areas to be looked after for additional reinforcement.
Actually using the calculation info while modelling reinforcement saves a lot of time, material and costs.