Evaluation Method for Green Construction Demonstration Projects in China Based on G-TOPSIS

Although the construction industry has played an important role in promoting national economic growth, over the past decades, construction activities have caused serious negative impacts on the ecological environment. Faced with this challenge, many countries have made promoting the greening of the construction industry one of their development goals. As a high-level demonstration project for green construction, Green Construction Demonstration Projects (GC-DPs) play a significant role in improving the level of green construction and promoting the green development of the construction industry. This study aims to establish a reasonable GC-DP evaluation method to promote the development of green construction in China. An evaluation index system is constructed, including five criterion layers, 20 main factors, and 60 sub-factors. Sixty sub-factors correspond to 60 specific indicators. The combination optimization of subjective and objective weights of indicators is conducted using game theory, and the comprehensive weights of indicators are calculated. Furthermore, a GC-DP evaluation model based on the gray TOPSIS method with game theory combination weights (hereinafter referred to as G-TOPSIS) is established. Finally, a case study is carried out to verify the feasibility of the proposed method. Expert scoring and actual engineering data are used to calculate indicator weights, and game theory is utilized to balance the influence of subjective and objective factors. Results show that the evaluation results obtained using the proposed G-TOPSIS method are consistent with the actual situation of the project