In this project exchange models with required objects and their attributes were

In this project exchange models with required objects

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In this project, exchange models with required objects and their attributes were more easily used for collabora- tive design. The architect and MEP engineer could im- port the corresponding exchange models into ArchiCAD and MagiCAD for architectural and MEP design, respec- tively. These exchange models not only avoided manual extraction from complete structural models, but were also beneficial for data processing (such as data storage, management, sharing, and exchange) of software tools. If the model with a great deal of irrelevant information was delivered for collaborative design, it would lead to massive and non-value-adding work. Conclusions In structural design, explicit exchange information re- quired by other disciplines is of fundamental importance in collaborative design. However, exchange requirements of structural design vary at different stages. This study pro- poses a delivery method with an ER Matrix, which allows users to define required information in the exchange mod- els at different stages. The delivery method of structural design information has been applied to a case study of a library building, and the results demonstrate its feasibility and efficiency. Some conclusions are listed as follows. 1. The activities of structural engineering in collabo- rative design were summarized to design a PM of structural design. This proposed PM with 22 sim- plified BPMN notations is beneficial to be easily ac- cepted. In order to resolve the confusion that BPMN notations are misused, these simplified notations are recommended to draw the PM for information ex- change. In addition, a template for process specifica- tion was proposed to standardize the task, analysis, and ER in each activity of structural design. 2. The ER Matrix of structural design was proposed with three options (R, O, and Empty). This ER Ma- trix standardizes required objects and their attrib- utes of structural design at different stages, avoid- ing inconsistent ER definitions. Through the non- technical term, exchange information of structural design can be easily defined. This matrix can also be extended to support information delivery for other disciplines. 3. To achieve the transformation from structural ERs to BIM models, the target objects and their attrib- utes in the ER Matrix were mapped to correspond- ing IFC data. Unlike the mapping between IDM and MVD developed by software developers, the required BIM data can be automatically extracted from the original IFC model according to the ER Matrix. Besides IFC2x3, the proposed method is also capable of supporting the transformation be- tween ERs and IFC4, thus ensures the delivery of exchange models based on IFC4 in the future. 4. A delivery tool with an exchange model genera- tion algorithm was developed to automatically de- liver structural design information extracted from original structural models. The tool provides two ways to define the ER Matrix, including user inter- face and XML-based language. The XML is a ge- neric computer-interpretable language editable and Table 5. Required objects in different exchange models during the delivery of structural design information
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