Sage Journals: Discover world-class research

Abstract

To assess seismic vulnerability of existing reinforced concrete buildings in Iran, cyclic and monotonic load tests on seven columns have been carried out. Four specimens represent existing buildings with deficient seismic details. Three others represent well proportioned constructions in accordance with provisions of intermediate ductility, ACI318–99, which is a common reference in Iran. Both types of columns are in similar positions in the reference building and are subject to similar seismic demand. Based on test results, hysteresis curves, backbone curves, and idealized curves are established. The deficient specimens show 35% reduction in both strength and initial stiffness and 37% loss of energy dissipation capacity in comparison to the well proportioned specimens. The length of plastic hinge of most tested columns is almost equal to full depth of the section. The maximum measured shear force is at least 20% greater than the shear force derived from expected nominal flexural strength.

Keywords

concrete column cyclic load test energy dissipation ductility deficient seismic details

Get full access to this article

View all access options for this article.

References

ACI Committee 318 (1999). Building Code Requirements for Structural Concrete (ACI 318–99) and Commentary (318R-99), American Concrete Institute.

Bayrak

and Sheikh

S.A.

(1998). “Confinement reinforcement design consideration for ductile HSC columns”, Journal of Structural Engineering, ASCE, Vol. 124, No. 9, pp. 999–1010.

Ehsani

M.R.

and Wight

J.K.

(1990). “Confinement steel requirements for connections in ductile frames”, Journal of Structural Division, ASCE, Vol. 116, No. ST3, pp. 751–767.

Esmaeily

and Xiao

(2004). “Behavior of reinforced concrete columns under variable axial loading”, ACI Structural Journal, Vol. 101, No. 1, pp. 124–132.

FEMA, FEMA-356 (2000). NEHRP Guideline for the Seismic Rehabilitation of Buildings, Federal Emergency Management Agency.

Hashem

M.M.

Mahin

A.S.

and Moehle

P.J.

(2003). “Performance of circular reinforced concrete bridge columns under bidirectional earthquake loading”, PEER2003/06, Pacific Earthquake Engineering Research Center.

Hwang

S.K.

and Yun

H.D.

(2004). “Effect of transverse reinforcement on flexural behavior of high-strength concrete columns”, Engineering Structures, Vol. 26, No. 1, pp. 1–12.

J.C.M.

and Pam

H.J.

(2003). “Inelastic design of low-axially loaded high-strength reinforced concrete columns”, Engineering Structures, Vol. 25, No. 8, pp. 1083–1096.

Lehman

D. E.

and Moehle

J.P.

(2000). “Performance-based design of reinforced concrete bridge columns”, 12WCEE 2000, pp. 2065.

10.

Ono

Shirai

Adachi

and Sakamaki

(1989). “Elastoplastic behavior of reinforced concrete column with fluctuating axial force”, Transactions of the Japan Concrete Institute, Vol. 11, pp. 239–246.

11.

Paulay

and Priestly

M.J.N.

(1992). Seismic Design of Reinforced Concrete and Masonry Buildings, John Wiley and Sons, New York.

12.

Pujol

(2002). Drift Capacity of Reinforced Concrete Columns Subjected to Displacement Reversals, Ph.D. Thesis, School of Civil Engineering, Purdue University.

13.

Saatcioglu

and Ozcebe

(1989). “Response of Reinforced Concrete Columns to Simulated Seismic Loading”, ACI Structural Journal, Vol. 86, No. 1, pp. 3–12.

14.

Xiao

and Martirossyan

(1998). “Seismic performance of high strength concrete columns”, Journal of Structural Engineering, ASCE, Vol. 124, No. 3, pp. 241–251.

Experimental Assessment of Reinforced Concrete Columns with Deficient Seismic Details under Cyclic Load

Abstract

Keywords

Get full access to this article

References