Title:
Pivot Hysteresis Model Parameters for Reinforced Concrete Columns, Joints, and Structures
Author(s):
Akanshu Sharma, R. Eligehausen, and G. R. Reddy
Publication:
Structural Journal
Volume:
110
Issue:
2
Appears on pages(s):
217-228
Keywords:
hysteresis; nonlinear; nonseismic detailing; pivot model; reinforced concrete; seismic analysis
DOI:
10.14359/51684402
Date:
3/1/2013
Abstract:
Inelasticity in reinforced concrete (RC) frame structures due to seismic loads is generally considered to be concentrated in the form of hinges in beams, columns, and joints. In this paper, the parameters for rectangular RC beams, columns, and nonseismically detailed beam-column joints are suggested, keeping the simplicity of the original pivot hysteresis model. With the proposed parameters, the existing model can be effectively used to perform nonlinear dynamic analysis of nonseismically detailed RC structures. Two major improvements in the parameters for columns as compared to the original model are: 1) new parameters cover the complete range of axial load on the column; and 2) it gives due consideration to the transverse reinforcement on pinching behavior of the members. Additionally, several parameters are proposed for poorly detailed exterior joints. It is shown that the model with the proposed parameters nicely captures the hysteretic behavior of RC members, joints, and structures.