The complex system structure of dangerous source in construction

This paper comprises the review on generation mechanism of construction engineering dangerous source by tracing back to the source of danger and the accident analysis theory in construction engineering area. This research points out the system of dangerous source has the characteristics of dynamic and multi-feedback, therefore the construction engineering dangerous source is considered as a complex system with three categories: energy medium, physical environmental factors and management errors. The complex relationship of the dangerous sources is discussed, and the connections of elements are described by adjacency matrix. Previous studies on dangerous source identification and assessment of construction project have only produced an unstructured list of such dangerous source and prioritizing them on the basis of probability and impact. This paper establishes the interpretative structural modeling method of dangerous source complex system, and divides three categories dangerous source system into four types: filed work, work environment, management decision and external supervision. The direct influence degree of the dangerous source on accidents is made clear, and the direct causes and the deep reasons of construction engineering are proved finally.