Технічне обґрунтування оптимального підходу до ремонту та реконструкції мостів з огляду на життєвий цикл

Abstract. The article examines the technical justification for selecting the optimal approach to bridge repair, reconstruction, or new construction based on their life cycle. The current state of bridges in Ukraine is analyzed, highlighting key issues related to their physical and functional deterioration. The study explores the life cycle cost (LCC) assessment approach and its impact on decision-making regarding bridge repair or replacement. The main factors affecting the durability and operational reliability of bridge structures are identified. A comparison of the economic feasibility of different reconstruction options is presented, along with recommendations for effective infrastructure management. Goal. The goal of this study is to provide a technical justification for choosing between bridge repair, reconstruction, or new construction by considering their life cycle, operational reliability, and long-term durability. Methodology. The research is based on an analysis of bridge life cycles, identifying key factors affecting their longevity and reliability. A comparative assessment of all costs associated with repair and new construction is conducted, considering hidden defects, potential additional expenses due to structural failures, and the long-term financial impact of different approaches. Results The life cycle analysis of bridge structures shows that additional repair costs may exceed the difference in price between major repairs and new construction. Furthermore, reconstruction has limited modernization potential, which can negatively affect the long-term durability and functionality of the structure. Originality This study highlights the necessity of incorporating life cycle cost analysis into decision-making regarding major bridge repairs or complete replacement, an aspect that has been largely overlooked in Ukrainian research. Practical value New bridge construction not only resolves existing technical issues but also creates opportunities for transport infrastructure development. One of its key advantages is the ability to increase bridge dimensions, improving traffic capacity and compliance with modern regulatory requirements. A comprehensive life cycle approach to bridge management will help optimize costs, prioritize reconstruction projects, and ensure the long-term reliability of transportation infrastructure.