Bridge design is a challenging procedure because bridges are among the most sophisticated constructions produced. While 3D modeling software has proved extremely useful in the design of buildings, these structures do not provide the same engineering or construction issues as bridges – for example, buildings are typically straight, vertical constructions with few impediments. Buildings can be difficult for a variety of reasons, including application needs, ground or topographical conditions, or even merely architectural design. Bridges, on the other hand, are frequently non-linear, horizontal structures that must weave through obstacles, existing structures, and many right-of-way restrictions, not to mention the often-difficult engineering requirements and locations in which they are constructed. Finding 3D design tools that can adapt to this non-linear geometry and the specific needs of bridges is a challenge in and of itself. However, novel tools like parametric modeling can help solve these problems for more efficient bridge design.

Parametric Bridge Design

A 3D model is built using Building Information Modeling (BIM) and then assessed to see if it will fulfill the intended purpose. The engineer sets the parameters for parametric modeling, which is then utilized to build a design that meets the required needs – resulting in a much more efficient approach of 3D bridge design. Changes to the design take less time since the program may alter a parameter and compute how the change will effect the entire model, updating the model while ensuring that all of the parameters are met. It is not necessary to rework the complete model, which saves time.

Familiar and User-Friendly

The phrase “parametric bridge design” sounds extremely technical, implying that it is difficult to master. Bridge design software, on the other hand, such as Allplan Bridge, has been expressly designed to be user-friendly for design engineers. Two-dimensional cross-sections and tables are used to generate 3D parametric models in a manner similar to the 2D sketches and spreadsheets with which many bridge engineers are already aware. In the background, the software performs the calculations without the need for any coding or programming language skills. This modeling method for horizontal structures such as bridges differs from the vertical building industry’s standard linear variation modeling capabilities.

Benefits of Parametric Bridge Design

Aside from being faster and easier to construct and alter a bridge design, parametric bridge design has further benefits. Several different detailed bridge concepts can be generated in a short period of time, allowing the best solution for the project to be picked. The ability to visualize a 3D geometric representation of the finished structure aids in visualization and determining constructability. 

However, the greatest value can be obtained with a modeling package created exclusively for bridge designers. Different loading scenarios can be examined with Allplan Bridge, whether for the basic design or the building stage – all inside the same model. For each stage, moments, shear, deflection, creep and shrinkage, temperature, and other factors can be calculated. Allplan Bridge will also create a library of cross-sections from completed projects in order to improve and advise future designs and bids. However, the fundamental value that parametric modeling adds to BIM is that it allows designers to address any uncertainties before construction begins, eliminating costly or risky guesswork on the job site. Bridge design software with the capability and precision of Allplan Bridge is a true advance in bridge design.

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  • Optimal work processes for bridge design
  • Improved BIM workflows
  • Easy optimization of bridge geometry
  • Specialized solution for precast girder bridges
  • Parametric modular modeling
  • Maximum flexibility and reduction in errors due to design modifications
  • AASHTO LRFD9 integrated / IFC4.3 supported
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