Preparation and compressive performance of composite materials in subway engineering using BIM model generation algorithm

Traditional methods for studying composite materials and compressive performance analysis in subway projects often face problems such as inconvenient data management and low efficiency. In order to alleviate this situation, this paper combines 3D modelling technology with BIM model generation algorithm, uses CAD software to build a virtual model of the composite material, and then uses BIM software to conduct simulation experiments. First, the composite material model is established, then the experimental environment is defined, and finally the test results are analysed. Through the collection and analysis of simulation test data, it was found that when the carbon fibre content in the composite material increased from 50% to 80%, its compressive strength gradually increased to 161.2 Mpa. However, when the carbon fibre content further increased to 90%, its compressive strength decreased to 148.8 Mpa. This discovery provides valuable theoretical basis and data support for further research on carbon fibre composites.