February 4, 2021
From: Meg Davis
Sponsored: When Arup was contracted to design the Cherrywood Grand Parade Bridge as a sustainable transportation system, 3D modeling and a connected data environment enabled the project to be completed by a much smaller team.
Cherrywood Grand Parade Bridge is part of a new development in downtown Dublin, Ireland, which includes a combination of residential, commercial, park and office space, making this developing suburb a major residential and business community. employment south of the Irish capital. The bridge will connect to an existing light rail bridge and will include two cycle paths and a pedestrian walkway. The design also had to provide a connection to downtown on either side of Wyattville Link Road and blend seamlessly into the urban environment by incorporating trees and soft landscaping for shelter and visual amenities. The structure has two spans, each measuring 22.5 meters in length, made up of composite steel girders with an in-situ reinforced concrete deck slab, varying in width from 13.4 meters to 16.4 meters. This is a complicated project, as the scope of work includes the construction of the backbone road network, including Grand Parade Road, and the extension of the viaduct for the light rail system.
Arup’s design for the Cherrywood Grand Parade Bridge.
Hines, the main developer of the project, appointed Arup to undertake the design of the Grand Parade Bridge on Wyattville Link Road. They realized they needed to optimize constructability and coordination between third parties, and that traditional 2D designs were not going to achieve their goals. Therefore, Arup chose 3D modeling delivery, as they determined it was the best solution to mitigate errors during construction and tender cost evaluation. However, the choice to model fully in 3D presented many challenges for the design team, including a software learning curve, which was compounded by complex road geometry and bridge interfaces within a tight time frame. .
Arup selected Bentley’s OpenBridge and ProStructures to provide the flexibility to detail all elements of the project, including foundations, abutments and piers, substructure, steel girder composite with concrete deck, and superstructure of the facade. The apps helped them perform accurate 3D bridge modeling and detailing for the entire project. OpenBridge Modeler helped speed up parametric modeling of bridge geometry and compensated for the extra time needed to extend Arup’s skills. Support from the Bentley product team to improve the design team’s proficiency in ProConcrete and ProSteel has improved efficiency in delivering 3D models of reinforcement and steelwork, as well as producing 2D drawings. The geometry of the bridge was easy to manipulate in OpenBridge during the coordination process between Arup, the architect, and external consultants.
Having used ProjectWise on other projects, Arup was comfortable switching to this platform. They used the platform as a single database for design data, which turned out to be the best choice for implementing standard schematics. iTwin services were used to organize review sessions of the stand-alone bridge model and the coordinated version, which incorporated reference models from all stakeholders. The iTwin Design Review web-based platform allowed for remote review, comment and measurement of items that required further confirmation and response from the designer.
Arup ensured full project data integrity through the collaborative connected data environment, using ProjectWise, for the multidisciplinary design team. Bentley’s connected data environment has established a robust platform for project control of all multidisciplinary digital content, drawings, reports and information exchanged by external consultants and architects. ProjectWise’s flexibility allowed them to easily access project coordination templates during internal design team technical meetings and external meetings with the client or third parties.
LumenRT allowed Arup to develop high-resolution images and videos (both 2D and 3D), as well as virtual reality models that allowed the client and stakeholders to provide feedback throughout the design process. The process increased customer satisfaction, improved the approval process, and provided an accurate, high-quality depiction of the new bridge.
“Bentley Systems’ workflow streamlined the Cherrywood Grand Parade Bridge design process, improving team communication and productivity,” said Pawel Ogonowski, Principal Bridge Engineer/Project Manager, Arup. “Smart parametric modeling and the seamless link between OpenBridge, OpenRoads and ProStructures helped deliver this project on a tight schedule. With ProjectWise in place and using iTwin Design Review, the project was shared and collaborated by stakeholders in a controlled manner. The result presented via high resolution images, videos and virtual reality, rendered in LumenRT, added value to the client. »
By using ProjectWise, Arup streamlined workflows and improved project team quality and efficiency. The intelligent and interactive use of digital workflows involving OpenRoads, OpenBridge and ProStructures enabled them to reduce risk and mitigate errors. In addition, the collaboration, communication and data management processes enabled them to deliver the project on time and on budget.
The use of workflows in Bentley software provided many benefits on this project, covering all stages of the tendering and detailed design process. Using OpenBridge cut the modeling process in half, compared to using alternatives, and improved design ROI by approximately 25%.
The level of detail achieved in the 3D models and integration with visualization software allowed stakeholders to provide feedback on an accurate representation of the bridge design. Changes made as a result of this feedback helped to ensure that the design of the bridge met the needs of the community, including providing accessible and safe pedestrian and cycle routes and connecting to Dublin’s sustainable transport network.