Abstract
Concrete barrier has been constructed mostly by casting in-situ in Korea, while various types of precast concrete barriers have been successfully applied in foreign countries. A new type of precast concrete barrier system was developed in this study and static test was performed to verify the load-carrying capacity and failure mode. An efficient method to combine the barrier and deck was devised using protruded reinforcements and mortar filling. Five sets of specimens were manufactured that simulate a cantilever part of the deck and a series of precast barriers referring to a shape of domestic standard concrete barriers. Variables of the experiment are joint type between the barriers, effect of an embedded pipe and deck, loading pattern and comparison with the conventional in-situ barrier. The joint of the barrier and deck maintained a sufficient integrity up to the ultimate state that can be induced from a car crash. The shear-key-type joint between the barriers showed a better performance when the epoxy was applied. As a result, the proposed system of precast barrier produced the ultimate capacity equivalent to that for the in-situ barrier of similar shape. Cracking pattern and failure mode were compared with the yield line theory presented in AASHTO LRFD. Finally, the corresponding test level(SB) of the specimen was discussed comparing with AASHTO LRFD.