ABSTRACT

This paper presents the ductility behaviour view of bridge pier structures located in earthquake prone zones. The confining steel installed on piers are evaluated and compared with provision on the standard design of lateral reinforcement installation requirements for earthquake resistant bridges in Indonesia (SNI 2833:2008). The ductility view of confined concrete piers is based on the developed confinement models obtained from a variety of dynamic load test results, such as Scott, Mander, and Hoshikuma models. The ductility analysis is simulated through sectional moment-curvature curves by estimating the sectional curvature ductility parameter. The two Pier bridges located in Central Java are taken as the case study; the circular section piers in medium earthquake zone and the wall section piers in strong earthquake zone. The results of analysis show that by applying the confinement models of Scott and Mander, the circular section piers have relatively high curvature ductility values while the wall section Piers have lower curvature ductility values. 

Keywords: Bridge Piers, Confining Steel, Curvature Ductility, Confinement Models.