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This study aimed to analyze construction data of Korean public apartment and then characteristics of collaborative network between contractor and subcontractor. The analysis results regarding density and centrality turned out to be able to express characteristics of the whole network and positions within the network of individual performers by quantitative values. The network visualization turned out to have an advantage that helps realize characteristics of the network intuitively and positions of individual performers.

The objective of this study is to investigate the file exchange compatibility of BIM based building energy simulation tools, especially focusing on various irregular building geometry shapes. As a base building modeling software, AUTOCAD Revit was selected and various building geometry shapes were created using Revit, such as curved and pitched walls, roofs, slabs with various air-conditioning zones. And these various shaped building zones were imported to ECOTECT, IES/VE and Openstudio for EnergyPlus, which are professional building energy simulation tools. Through this create-import process, the deformation of building shapes, change of zone volume, and compatibility to each simulation engine were investigated and analyzed.