Three-dimensional collapse simulation on the spatial structure of concrete assembly building based on BIM

In order to overcome the problems of inaccurate load data and large simulation error in the existing collapse simulation methods of prefabricated building spatial structure, this paper proposes a BIM based 3D collapse simulation method of concrete prefabricated building spatial structure. The framework of simulation numerical model is constructed, the internal force relationship is determined, the load displacement data of current space collapse is obtained from multiple angles, the simulation parameters of current data results are selected to simulate materials, the current constitutive relationship is determined under the BIM model relationship, and the data extraction and stress conversion are completed based on the BIM model to realise the collapse simulation of building structures. The experimental results show that compared with the traditional method, the load data of this method is more accurate, and the collapse simulation process is more in line with the real situation.