(1) Conceptual Design Stage: Utilizing Revit’s volume and parametric modeling capabilities, a variety of irregular components can be created to clearly and accurately convey the designer’s vision. Designers can intuitively adjust each component’s parameters to achieve the optimal conceptual model, ultimately forming the final 3D representation. In contrast, CAD-based conceptual design is limited to flat displays and cannot visually present the project’s structure. It requires specialized knowledge and spatial imagination to build a virtual model, or relies on other software for visualization. Overall, BIM technology offers significant advantages, especially during the conceptual design phase of large bridges, landscape bridges, and municipal bridges.
(2) Scheme Design Phase: Using Revit series software such as Infraworks, designers can generate a 3D terrain and natural environment surrounding the bridge site. The 3D bridge model created in Revit can then be imported to visually present the design scheme within this realistic 3D context. This allows for verification of span layout, selection of upper and lower structural components, navigation conditions, and site positioning. For specialized bridges, BIM enables the creation of multiple conceptual models that incorporate terrain, navigation, technical challenges, and more to support informed decision-making. Additionally, BIM facilitates the production of animations and rendered visuals that can be used directly for bidding and proposal presentations.
Currently, other software is often required to aid in design visualization, which adds extra costs and creates communication barriers between disciplines, leading to potential inaccuracies in representation.
(3) Preliminary and Construction Drawing Stage: The BIM model, integrated with information technology, becomes the central deliverable during this phase. It significantly reduces errors and clashes between design components, and automatically generates 2D construction drawings. The linked modification process greatly enhances the efficiency of design updates, while parametric tools improve the accuracy and speed of quantity takeoffs, aiding in precise cost control. A common challenge faced by design institutes is the lag in geological survey data and the frequent revisions of design drawings following expert reviews, increasing the workload for designers. BIM-based bridge design effectively addresses and refines these issues.
Furthermore, the BIM model acts as a comprehensive project database that provides essential support for decision-making regarding complex construction technologies in later stages. It also serves as a valuable resource for managing engineering information throughout construction. Overall, BIM-based bridge information design technology has elevated both the efficiency and quality of bridge design, ensuring timely project delivery and high-quality outcomes.
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