Sensitivity to Constitutive Modeling in Fiber-Based Discretization of Reinforced Concrete Members for Performance-Based Seismic Evaluation

Abstract

Accurate constitutive models of the constituent materials in a reinforced concrete (RC) section, namely, unconfined concrete, confined concrete and reinforcing steel are necessary in fiber-based discretization of RC components for use in nonlinear analysis of RC structures. This paper examines the sensitivity to different constitutive models in predicting the inelastic seismic behavior of RC frame structures. In particular, the importance of incorporating confinement effects in modeling concrete behavior and including degrading effects in modeling the behavior of reinforcing steel bars so as to predict the monotonic, cyclic and seismic response of RC columns and frames is investigated. At the component level, it is shown that the inelastic response is controlled predominantly by the behavior of reinforcing steel. At the system level, the response of non-ductile structures is less sensitive to confined concrete models while the modeling of reinforcing steel is shown to influence the inelastic response of both non-ductile and ductile structures.

Keywords

analytical modeling confined concrete constitutive models inelastic behavior reinforcing steel seismic response

Get full access to this article

View all access options for this article.

References

Chang

and Mander

(1994). Seismic Energy Based Fatigue Damage Analysis of Bridge Columns: Part I – Evaluation of Seismic Capacity, NCEER Technical Report 94–0006, Buffalo, New York.

Cusson

and Paultre

(1995). “Stress-strain model for confined high-strength concrete”, Journal of Structural Engineering, ASCE, Vol. 121, No. 3, pp. 468–477.

El-Bahy

Kunnath

S.K.

Stone

W.C.

and Taylor

A.W.

(1999). “Cumulative seismic damage of circular bridge columns: Benchmark and low-cycle fatigue tests”, ACI Structural Journal, Vol. 96, No. 4, pp. 633–641.

Hognestad

(1951). “A study of combined bending and axial load in reinforced concrete members”, Engineering Experiment Station Bulletin No.399, University of Illinois, Urbana-Champaign, pp. 128.

Hoshikuma

Kawashima

Nagaya

and Taylor

(1997). “Stress-strain model for confined reinforced concrete in bridge piers”, Journal of Structural Engineering, ASCE, Vol. 123, No. 1997, pp. 624–633.

Kanaan

A.E.

and Powell

G.H.

(1973). DRAIN-2D, A General Purpose Computer Program for Dynamic Analysis of Inelastic Plane Structures, Report EERC 73–6, University of California, Berkeley.

Kunnath

S.K.

Heo

Y.A.

and Mohle

(2008). “Nonlinear uniaxial material model for reinforcing steel bars”, Journal of Structural Engineering, ASCE (in press).

Lee

L.H.

Han

S.W.

and Oh

Y.H.

(1999). “Determination of ductility factor considering different hysteretic models”, Earthquake Engineering and Structural Dynamics, Vol. 28, No. 9, pp. 957–977.

Madas

and Elnashai

A.S.

(1992). “A new passive confinement model for the analysis of concrete structures subjected to cyclic and transient dynamic loading”, Earthquake Engineering and Structural Dynamics, Vol. 21, No. 5, pp. 409–431.

10.

Mander

J.B.

Priestley

M.J.N.

and Park

(1988). “Theoretical stress-strain model for confined concrete”, Journal of Structural Engineering, ASCE, Vol. 114, No. 8, pp. 1804–1826.

11.

Menegotto

and Pinto

(1973). Method of Analysis of Cyclically Loaded RC Plane Frames Including Changes in Geometry and Non-Elastic Behavior of Elements Under Normal Force and Bending, Preliminary Report, IABSE, Zurich, No. 13, pp. 15–22.

12.

Y.L.

and Wang

S.J.

(2000). “Seismic behavior of RC columns with various tie configurations”, Journal of Structural Engineering, ASCE, Vol. 126, No. 10, pp. 1122–1130.

13.

Ohno

and Nishioka

(1984). “An experimental study on energy absorption capacity of columns in reinforced concrete structures”, Proceedings of the JSCE, Structural Engineering/Earthquake Engineering, Vol. 1, No. 2, pp. 137–147.

14.

OpenSEES (2008). Open System for Earthquake Engineering Simulation, http://opensees.berkeley.edu.

15.

Otani

and Sozen

M.A.

(1972). Behavior of Reinforced Concrete Multistory Frames During Earthquakes, Structural Research Series No.392, University of Illinois, Urbana.

16.

Riddell

Garcia

J.E.

and Garces

(2002). “Inelastic deformation response of SDOF systems subjected to earthquakes”, Earthquake Engineering and Structural Dynamics, Vol. 31, No. 3, pp. 515–538.

17.

Sargin

(1971). Stress-Strain Relationship for Concrete and the Analysis of Structural Concrete Sections, PhD Dissertation, University of Waterloo, Canada.

18.

Scott

M.H.

and Fenves

G.L.

(2006). “Plastic hinge integration methods for force-based beam-column elements”, Journal of the Structural Engineering, ASCE, Vol. 132, No. 2, pp. 245–252.

19.

Sheikh

S.A.

and Uzumeri

S.M.

(1982), “Analytical model for concrete confinement in tied columns”, Journal of Structural Engineering, ASCE, Vol.108, No. 12, pp. 2703–2722.

20.

Spacone

Filippou

F.C.

and Taucer

F.F.

(1996). “Fibre beam-column model for nonlinear analysis of RC frames: Parft I. formulation”, Earthquake Engineering and Structural Dynamics, Vol. 25, No. 7, pp. 711–725.

21.

Takeda

Sozen

M.A.

and Nielsen

N.N.

(1970). “Reinforced concrete response to simulated earthquakes”, Journal of Structural Division, ASCE, Vol. 96, No. 12, pp. 2557–2573.