Development and calibration of new reliability-based bridge design code in Korea

Since the first bridge design code was introduced in 1962 in Korea, regular revisions have been made in accordance with new social and technological needs. However, to meet with global standard, state-of-art technology and fast-changing local environments, new bridge design code is being developed based on reliability or limit states concept. This paper deals with the calibration of load and resistance factors based on new live load model. To establish statistical characteristics of live loads, truck weights and traffic patterns information are collected using WIM system and video recording. Based on probabilistic analysis, new live load model and their statistics are determined Statistical data on strength of concrete, reinforcing bars and steel members are collected and used in evaluation of member strength. Reliability analysis is performed on various types of bridges. Comparisons are made with current design code to prove the validity and effectiveness of proposed design code.