ONE parametric Model for Geometry, Analysis & Detailing

Allplan Bridge is a groundbreaking solution for 4D parametric modeling and structural analysis of bridges. The software supports all design phases, from concept, through structural analysis to final design. The parametric bridge model including pre-stressing tendons and construction sequence definition offers an unprecedented level of user friendliness and flexibility. The cutting-edge technology enabling in an automated but user-controlled process to generate an analytical model from the geometrical model is a further factor for saving significantly on design time and reducing the susceptibility to errors.

Design your bridges more efficiently:

  • Optimal work processes for bridge design
  • Maximum flexibility and reduction in errors due to design modifications
  • Improved BIM workflows
  • Easy optimization of bridge and tendon geometry
  • 4D Bridge modelling: Construction sequence definition
  • Automatic but user-controlled generation of analytical model.
  • Assembling construction sequence calculation
  • Nonlinear time dependent material behavior
  • Superimposed dead load derivated from the geometrical model
  • Next generation superposition
  • Structural analysis
  • Precise and reliable

Allplan Bridge Functionality

Allplan Bridge is a powerful parametric 3D modeling solution to assist the bridge engineer with the design of bridges, especially concrete and composite bridges. The unique parametric model description enables quick and efficient management of the inevitable changes that occur during the design process. This saves both time and money.

The parametric model considers the alignment and the profile of a road. The cross-section of the bridge as well as its variation along the alignment is described parametrically. Even complex geometries including double curved alignment and variable cross-sections can be easily created with the help of alphanumeric entries and stored formulas, making model configuration quick and efficient. It is also possible to have several bridge geometries in one Allplan Bridge model.

Road alignment defined in Allplan or other systems can be used to assist with the initial bridge layout. The superstructure is then created based on the alignment and the defined typical cross-section. The intuitive workflow reduces learning time and enables bridge models to be created quickly and efficiently. Variations, e.g. linear or parabolic can be entered via tables and/or formulas and can include dependencies such as sub-alignments and cross-sections. For example, the user only needs to define one typical cross-section and Allplan Bridge will accurately calculate the variation of the cross-sections along the alignment.

Substructure members such as bridge abutments and piers are generated using the same principle. To minimize the input procedure, the individual objects are related to vertical axes which are defined relative to the superstructure. This allows automatic adjustment of the substructure if the superstructure is modified. This results in tremendous time savings and reduction in errors.

This parametric model description guaranties an intelligent and reliable 3D Bridge model. The entire bridge geometry can be automatically updated if the alignment and/or cross-sections are modified including repositioning of abutments and piers.

Once the design is completed, the bridge model is transferred in Allplan Engineering for completion drawings. Additionally, the same bridge model can easily be transferred to analysis tools (such as Bentley RM Bridge) for structural calculation.

Model creation without compromise

Allplan Bridge has been developed by recognized bridge experts – Allplan Infrastructure from Graz – and to the requirements of bridge engineers. The 3D parametric model description considers the road layout, bridge alignment and required cross-sections, making model configuration quick and efficient. Complex geometries including double curved alignment and variable cross-sections can be created easily with the help of alphanumeric entries and formulas. For example, the user only needs to define one typical cross-section and Allplan Bridge will accurately calculate all cross-section variants in accordance with the defined table(s) or/and formula(s). A complete 3D Bridge model cannot be generated more easily or quickly.

Model creation without compromise

Prestressing made simple but not simplified

Allplan Bridge 2019 makes it easy to model a wide range of types of pre-stressing: with immediate or later bond, internal and external, longitudinal, transverse and vertical, as well as with non-standard geometry. Based on user-defined 3D points, the program automatically generates the geometry of a tendon along the bridge structure. Each 3D Tendon point is specified by the position along the axis, and the position in the cross-section in relation to a reference point. In addition, direction angle and curvature radius of the tendon can be specified in each point. Selective parameters can be defined as variable. When calculating the detailed tendon geometry, the program determines these values automatically, using an intelligent algorithm minimizing the friction losses in the stressing process. A special point grid is available in the cross-section to ease the specification of the tendon position in the cross-section plane. This point grid facilitates copying and mirroring of the tendon in longitudinal and transverse direction.

Changes made in no time at all

Allplan Bridge helps you to manage the inevitable changes that occur during the design process. The parametric model description is an ideal base for adapting design changes. The modifications are incorporated only at their origin and all other linked members are automatically updated. For example, if the road axis changes the complete bridge geometry will be adjusted. If only a certain structural member is modified only directly linked elements will be recalculated.

Changes made in no time at all

Smart Placements

Not only objects in Allplan Bridge but also elements from Allplan (Engineering) library can be referenced in Allplan Bridge and are together representing a detailed parametrical bridge model.

Any type of object that can be modeled in Allplan (Engineering), e.g.: lamp post, can be saved to the project and/or office library. The given name can be assigned to certain reference points in Allplan Bridge and, using variables, it can be positioned at arbitrary stations along the bridge. This way of referencing and connecting Allplan Bridge with the Allplan library allows to update the created model with repositioning the objects automatically.

Smooth data exchange

Integrating road data used for road/bridge alignment is easily achieved via ALLPLAN’s open BIM platform Allplan Bimplus. The bridge engineer must only take over the road data and can immediately start with the bridge design. To assist the engineer even further, the bridge model can easily be transferred to analysis software (such as Bentley RM Bridge) for structural calculations. Once the design is completed, the parametric model can be transferred in Allplan Engineering for completion of pre-stressing and reinforcement drawings.

Smooth data exchange

Convenient operation

Compared to mechanical engineering CAD software or traditional 2D drafting, working with Allplan Bridge is very convenient and specifically tailored to the requirements of bridge engineering. This leads to an essential optimization of the working speed. Furthermore, you can use Allplan Bridge on multiple monitors at the same time. Allplan Bridge automatically adapts its user interface to the screen size and resolution and is ideal for the use in powerful high-resolution monitors (4D/UHD with 3840×2160 pixels and more).

Intelligent database

Allplan Bridge benefits from a built-in database that is continuously logging modifications as the project progresses. This will benefit projects that have a long design period by ensuring project data is securely available for the duration of the project.

Intelligent database

From model to time planning

The parametric bridge model generated in Allplan Bridge can be subdivided into individual construction elements. These can be transferred to Allplan Bimplus and linked with time-specific attributes. Thus, a construction sequence can be easily defined and visualized.

Stressing sequence for pre-stressing tendons

A stressing sequence can be defined for each parametrically described tendon. There are three different actions available, Stressing, Wedge Slip and Releasing These actions are carried out at the begin of the tendon, at the end, or at both sides simultaneously.

The input is group oriented, allowing to optimize the management of the tendon stressing procedure. The actions described above are defined only for the user defined group(s). With the drag-and-drop functionality the tendon(s) is(are) assigned to the corresponding group and automatically stressed in accordance with the group definition. To allow more flexibility, values can be adjusted individually for each tendon.

Stressing sequence for pre-stressing tendons

Technical support from bridge experts

ALLPLAN’s bridge design experts have over 30 years’ experience supporting engineers worldwide. ALLPLAN’s clients can benefit from our technical experts providing comprehensive consultancy, training and support.