Abstract: The construction of digital construction platforms improves the sharing degree of project transaction information and reduces the degree of information asymmetry in the process of project transaction. Therefore, it has become a powerful tool for supervision of major construction projects transaction. In order to explore the strategy formation and behavior evolution process for transaction the behavior supervision system of major construction projects under the context of digital construction, based on the evolutionary game theory and system dynamics, this paper constructed an evolutionary game model for the transaction behavior supervision of major construction projects under digital construction situation supervision, and explored the influence of different external variables on the strategy changes of the project supervisor, the project contractor, and the project owner, as well as the influence of the level of the digital construction platform on the stability of the evolutionary game strategy. The simulation results show that the punishment intensity, the supervision cost, and the expected gain from violation have a great impact on the transaction behavior of the participants. The improvement of the level of the digital construction platform can effectively curb the illegal behavior of the project supervisor and the project contractor. Finally, some reasonable suggestions are proposed concerning the design of scientific and reasonable management of digital construction platforms and the behavior of game players, so as to effectively achieve the construction objectives of major projects.

Key words: major construction projects, digital construction, transaction behavior supervision, evolutionary game, system dynamics

摘要： 数字建造平台的构建，提高了重大工程交易信息的共享程度，即降低了工程交易信息的不对称程度，因而成为重大工程交易行为监管的有力工具。为探讨在数字建造情境下重大工程交易行为监管系统中主体的策略形成及行为演化过程，结合演化博弈理论和系统动力学方法，构建了数字建造情境下重大工程交易行为监管的演化博弈系统动力学模型，探究了此情境下不同外部变量对工程发包方、工程监理方和工程承包方策略变化的影响，以及数字建造平台的等级对演化博弈策略稳定性的影响。结果表明，惩罚力度、监管成本和违规收益期望值对参与主体的交易行为有较大影响，以及随着数字建造平台等级的提升能有效地遏制工程监理方和工程承包方的违规行为。由这一结果，围绕数字建造平台设计科学合理的管理方式和博弈主体行为提出了相关建议，以高效实现重大工程建设目标。

关键词: 重大工程, 数字建造, 交易行为监管, 演化博弈, 系统动力学