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http://dx.doi.org/10.5000/EESK.2007.11.3.023

Evaluation of Seismic Performance of Prefabricated Bridge Piers with a Circular Solid Section  

Kim, Hyun-Ho (중앙대학교 건설환경연구원)
Shim, Chang-Su (중앙대학교 건설대학 토목공학과)
Chung, Chul-Hun (단국대학교 공과대학 토목공학과)
Kim, Cheol-Hwan (포스코건설 기술연구소)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.11, no.3, 2007 , pp. 23-31 More about this Journal
Abstract
Fast bridge construction has been increasingly needed according to the changed construction environment. This paper deals with quasi-static tests on precast piers for bridge substructures. One of the most crucial aspect of the design of precast prestressed concrete bridge piers is the seismic performance. Seven precast pier elements were fabricated. The amount of prestressing bars, the prestressing force, and the location and number of the joint between segments were the main test parameters. Test results showed that the introduced axial prestress made the restoration of the deformation under small lateral displacement and minor damage. However, there was no effect of the prestress when the plastic hinge region was damaged severely due to large lateral displacement. Judging from the observed damage, the design of the joints in precast piers should be done for the first joint between the foundation and the pier segment. The amount of the necessary prestressing steel may be designed to satisfy the P-M diagram according to the service loads, not by having the same steel ratio as normal RC bridge piers. In order to satisfy the current required displacement ductility, it is necessary to have the same amount of the transverse reinforcements as RC piers. As the steel ratio increases, the energy absorption capacity increases. The number of joints showed a little influence on the energy absorption capacity.
Keywords
Quasi-static test; precast prestressed concrete bridge pier; seismic performance; displacement ductility; energy absorption capacity;
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