Practical Approaches to the Application of Life-Cycle Civil Engineering for Infrastructures in Korea
Recently in Korea, the demand is rapidly growing on the practical implementation of standard guides and soft wares for life-cycle cost analysis, design and management of civil infrastructures, mainly because the Ministry of Construction & Transportation of Korea Government recognized the importance of the economic analysis of whole life investment for civil infrastructures, and thus now legally requires to apply VE/LCC analysis, and LCC-effective design and management to all the project over 1 bil. Won (about 11 mil. $).
An overview is presented of recent progress of Life-Cycle Civil Engineering (LCCE) in Korea. with a critical review of the state-of- the-practice, and the recent research & development of models and methodologies for LCC analysis, design, and management of civil infrastructures, with emphasis on bridge structures.
Especially in the paper, practical approaches to the LCC methodologies are introduced with emphasis on uncertainty assessment of performance and cost data, ether the subjective or the objective, using the available statistical methods including Bayesian updating and Fuzzy uncertainty assessment based on historical records or experts opinion survey.
Also, the LCC soft wares systems developed in Korea for LCC analysis of highway and railroad bridge structures, respectively are reviewed with emphasis on integrated LCC system models that include the direct and indirect cost models, user friendly knowledge-based database incorporating statistical assessment and updating, reliability/risk assessment and optimization modules.
Various application examples are presented with those of LCC analysis for tenders at design stage, LCC-effective optimum design, LCC analysis for maintenance and management, and the optimal seismic risk-assessment for LCC-effective seismic maintenance and retrofit strategies, which demonstrate the applicability of the LCC models and methodologies suitable for the practice in Korea.
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