Positive emergent effect in post–collapse building restoration systems

Abstract

The paper examines the phenomenon of positive emergence within the synergistic system of construction and restoration works following building collapses caused by significant natural or man-made impacts. Emergence is defined as the manifestation of qualitatively new, previously unpredictable system properties leading to the enhanced performance of the object. The post-earthquake restoration of the Italian village of Venzone (1976) serves as a case study, demonstrating how a disaster can catalyze improvements in architectural integrity, functionality, and socio-economic value through adaptive reconstruction. A probabilistic-statistical model for predicting the Positive Emergence Effect (PEE) is developed, incorporating key influencing factors: project team competence, flexibility of design solutions, sufficiency of resources, and the architectural improvement potential of the project. Under favourable conditions, the baseline probability of PEE is estimated to exceed 17 %. The model is then refined by introducing the critical important risk factor of latent defects undetected during the initial technical survey. Accounting for this factor significantly reduces the predicted PEE probability, highlighting the paramount importance of comprehensive pre-project examination and uncertainty management. The practical value of the research lies in justifying adaptive project design and flexible management approaches to realize the emergent potential in post-collapse restoration. The proposed framework provides a basis for developing compensatory measures against unforeseen complications. The research concludes that a positive emergent effect should be considered a valuable target in reconstruction planning, capable of transforming a recovery process into an opportunity for holistic systemic enhancement of the building across technical, economic, and sociocultural dimensions.