This invention discloses an integrated collaborative modeling and bidirectional updating method and
system for steel modular building structures, belonging to the field of
physical computing technology. Addressing the problems of fragmented multi-disciplinary data, low optimization iteration efficiency, and reliance on manual reconstruction for output, this invention extracts geometric data from DXF drawings, fills in the code and integrates information from the architectural, structural, and
energy consumption disciplines, and constructs an integrated digital foundation. Based on this foundation, it automatically calculates
building material costs, structural performance indicators, and building heating and cooling loads; it constructs isomorphic and heteromorphic graph data, and trains the GCN structural proxy model and the HGCN
energy consumption proxy model; with cost minimization and
energy minimization as optimization objectives, it uses an improved MOEA /
D algorithm incorporating a dynamic neighborhood strategy combined with the proxy model for optimization iteration; after selecting the
optimal design variables, it updates the integrated digital foundation in reverse, realizing integrated collaborative modeling and bidirectional updating of steel modular building structures, and automatically mapping and outputting the IFC model.