An OpenBIM-based Framework for Lifecycle Management of Steel Reinforcement

Abstract

Reinforced concrete (RC) is commonly used in modern building construction. Steel reinforcement (or rebar) design and fabrication are important tasks for the construction of RC buildings. However, these processes are currently conducted semi-automatic, requiring large human effort and processing time. Besides, there is a lack of efficient approach for progress monitoring of onsite rebar installation, and the deviation between actual rebar layout and as-design model can not be accurately analyzed and recorded. Therefore, this study aims to develop an openBIM-based framework for rebar lifecycle management, concerning the design, manufacturing, assembly, renewal and demolition. Firstly, an automatic clash-free rebar design optimization approach is proposed integrating optimization algorithms and AI techniques. Secondly, A open digital workflow based on information delivery manual (IDM), model view definition (MVD), and Industry Foundation Classes (IFC), and the integration with machine fabrication code is developed to support rebar prefabrication. Thirdly, a BIM-based progress monitoring approach is proposed integrating laser scanning, while the rebar BIM model is updated with as-built data. Moreover, the applications of as-built rebar BIM model in maintenance, renewal and demolition are discussed.