Abstract: An agent-based modeling method is implemented to explore the diffusion of BIM technology among construction companies based on mechanism of technology innovation. Based on the complex network and threshold model, the decision-making model of construction companies is established to analyze the impact of consumer preferences, social network structure and the maturity of BIM technology on the adoption behavior of construction companies. Then, an agent-based BIM technology diffusion simulation model is built, and Netlogo is used for simulation. According to the simulation results, the diffusion trend of BIM technology is predicted, the critical factors driving the diffusion of BIM technology are extracted, and suggestions to promote the diffusion of BIM technology are put forward. The results also show that: the social network structure plays an important role in the diffusion of BIM technology. The probability of reconnection can significantly increase the diffusion depth of BIM technology, but the impact on the diffusion speed presents complex and dynamic changes. Under the same network topology, the interaction between nodes has a certain degree of stability in driving the proliferation of BIM technology. The average degree can reduce the difference of network structures to a certain extent. An increase in the proportion of initial adopters can promote the "take-off" of innovation, shorten the innovation diffusion cycle, and accelerate the diffusion speed, but it has limited effect on the final stable diffusion depth.

Key words: building information modeling (BIM), BIM technology diffusion, complex social networks, agent-based modeling, NetLogo