Sustainable construction requires effective innovation in construction projects. Innovations involved multiple professionals and participants, inter-organization collaborative among stakeholders is considered as a feature and basic demand for innovation management. Exploring complicated interaction relations of stakeholders in inter-organization collaborative innovation, which is an important guarantee to realize innovation in sustainable construction. The network was viewed as a complex system that can replace stable organizational structure and procedures. It is necessary to shed light on the internal mechanism of innovation from the network perspective to promote the performance of innovation. This article investigates the project network of an industrial construction project in China by adopting the social network method and in-depth quantitative data analysis. Based on the network data and qualitative interview, the structure of the project network in the process of innovation for sustainable construction is analyzed, the key actor in the innovation management is revealed, and the influence factors of the inter-organization collaborative is pointed out. Research results will help promote the inter-organization collaborative innovation and improve the efficiency of sustainable construction.

With the development of building information technology, Building Information Modeling (BIM) has become an important way to effectively solve the cross‐organization information collaboration of Public‐Private Partnership (PPP) projects, and how to promote the adoption of BIM in PPP projects has become a realistic problem to be solved urgently. This study discusses the adoption of BIM among stakeholders in PPP projects based on prospect theory and evolutionary game theory. A tripartite evolutionary game model including governments, social capitals, and contractors is established. The behavioral evolution mechanism of each stakeholder on BIM adoption is explored by analyzing the evolutionary equilibrium, and the key influencing factors of equilibrium strategy are analyzed by using numerical simulation. The results demonstrate that first, the degree of the cost to all stakeholders involved in the adoption of BIM, as well as the punishment for governments’ passive promotion of BIM, the punishment for social capitals’ passive adoption of BIM and the reward for contractors’ active application of BIM are the key factors affecting evolutionary stability. Second, according to prospect theory, the main stakeholders usually make decisions through subjective judgment and perceived value which ultimately lead to deviation in their behaviors. The deviations will hinder the establishment of ESS point (1, 1, 1) and make the system difficult to converge to the optimal state. Finally, from the perspective of governments, social capitals, and contractors, countermeasures and management implications are put forward to effectively promote the adoption of BIM in PPP projects.