Title:
Performance-Based Design of Confinement Reinforcement in Reinforced Concrete Bridge Pier Walls for Out-of-Plane Seismic Loads
Author(s):
Nagi A. Abo-Shadi, M. Saiid Saiidi, and David H. Sanders
Publication:
Structural Journal
Volume:
98
Issue:
1
Appears on pages(s):
3-15
Keywords:
ductility; load; pier; reinforced concrete
DOI:
10.14359/10142
Date:
1/1/2001
Abstract:
The objective of this research was to develop an approach that relates the confinement reinforcement in the plastic hinge zone of bridge pier walls to the displacement ductility capacity. An analytical model to predict the seismic response of bridge pier walls was developed and verified using test data. A parametric study was conducted using a computer program named Pier to study pier walls with a wide range of parameters. Based on the results of the parametric study, a new performance-based design method was developed. The proposed method can be used to design the confinement reinforcement based on a target displacement ductility level. Conversely, the method can be used to estimate the ductility capacity of an existing wall with a known amount of confinement reinforcement. Depending on the ductility demand, the result can be used to determine if retrofit of the wall is necessary.