Objectives. Safety assessment helps the development of continuous improvement strategies in construction safety, especially coping with dynamic changes to the on-site environment with uncertainties. This article proposes a composite safety assessment based on on-site conditions to facilitate improved and proactive construction safety management. Methods. First, based on evident rectification records, we utilized set pair analysis, a grey rough approach and a coevolution approach to quantify overall safety performance. Second, we incorporated two safety performance indicators into a composite assessment framework, using rough set theory and fluid dynamics. Finally, the assessment results of the seven completed projects were compared. Results. The coevolution approach had novel advantages in assessing rectification performance and the fluid dynamics approach could enhance the proactive warning ability of the safety assessment. Conclusion. Theoretically, the research contributes to new insights into the quantification of construction safety assessment under dynamic on-site conditions. Practically, it also contributes to the active and objective measurement of management performance and promotes the dynamic and stable safety performance evaluation for on-site construction.
Keywords: construction industry; on-site environment; performance assessment; safety.