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- W4382600405 abstract "Geometric control of short-line match casting using Computational BIM Nandeesh Babanagar , Ashwin Mahalingam , Koshy Varghese , Vijayalaxmi Sahadevan Pages 379-386 (2023 Proceedings of the 40th ISARC, Chennai, India, ISBN 978-0-6458322-0-4, ISSN 2413-5844) Abstract: Short-line match casting is a method of producing segmental pre-cast concrete bridges. This segment-production process is centralized, repetitive, compact, and easily adaptable to geometry variations such as plan, vertical, and transition curves. But the main challenge is the complexity of geometry control and the need for high accuracy. The complexity arises due to the changing coordinate system and the accumulation of errors for each segment. It is susceptible to geometric errors that accumulate over the entire span resulting in significant deviation from the alignment. This calls for rigorous geometry control during the casting process. The current work proposes a framework/workflow, called the Geometric Error Minimization for Bridge Segment Casting (GEMBSC), for minimizing geometric errors in segmental casting alignment in real-time. It involves the formulation of an iterative geometric control algorithm using the least-square method and a software tool to manage the geometric control workflow. Dynamo, a computational BIM tool, was used to extract the coordinates from the BIM model and perform coordinate transformations that feed to the surveying instruments. Subsequently, the tool compares the as-cast data with the planned geometry data and runs the error minimization algorithm to output the corrected coordinates for the casting of subsequent segments. The algorithm was validated based on past real-world data by the results obtained for the same data through a proprietary software application. The results indicated that GEMBSC is effective in minimizing errors along with providing other benefits such as savings in time and effort involved in error corrections with existing software use. Keywords: Computational BIM, Short-line match casting, Dynamo Visual Programming DOI: https://doi.org/10.22260/ISARC2023/0052 Download fulltext Download BibTex Download Endnote (RIS) TeX Import to Mendeley Presentation Video: https://youtu.be/jKm3kL2O-TI" @default.
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- W4382600405 date "2023-07-07" @default.
- W4382600405 modified "2023-09-25" @default.
- W4382600405 title "Geometric control of short-line match casting using Computational BIM" @default.
- W4382600405 doi "https://doi.org/10.22260/isarc2023/0052" @default.
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