Development of Collapse Indicators for Risk Assessment of Older-Type Reinforced Concrete Buildings

Abstract

This study examines the seismic collapse safety of older, non-ductile reinforced concrete building frames designed and constructed prior to the 1980s. The study considered idealized buildings with heights ranging from 4 to 12 stories. Performance was gauged using nonlinear dynamic analysis software considering nonlinearities associated with flexural yielding, shear failure, and axial failure. In addition to building height, the main variables were the relative strengths of columns and beams, and the relative shear and moment strengths in the columns. Incremental dynamic analysis was used to determine the probability of collapse for various combinations of the study variables. The results indicate that simple engineering indicators such as column-to-beam strength ratio and column flexural to shear strength ratio can be used to assess the collapse risk of older-type concrete buildings.

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References

American Concrete Institute (ACI 318-11), 2011. Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary, Farmington Hills, MI.

American Society of Civil Engineers (ASCE 7–10), 2010. Minimum Design Loads for Buildings and Other Structures, Reston, VA.

American Society of Civil Engineers (ASCE 41-06), 2006. Seismic Rehabilitation of Existing Buildings (with Supplement 1), Reston, VA.

American Society of Civil Engineers (ASCE 31-03), 2003. Seismic Evaluation of Existing Buildings, Reston, VA.

Applied Technology Council (ATC-78-1), 2012. Evaluation of the Methodology to Select and Prioritize Collapse Indicators in Older Concrete Buildings, FEMA, Redwood City, CA, in press.

Earthquake Engineering Research Institute (EERI), 2011. The Concrete Coalition and the California Inventory Project: An Estimate of the Number of Pre-1980 Concrete Buildings in the State, Oakland, CA, available at https://www.eeri.org/wpcontent/uploads/Concrete_Coalition_Final_0911.pdf.

Elwood

K. J.

2004. Modelling failures in existing reinforced concrete columns, Canadian Journal of Civil Engineering 31, 846–859.

Elwood

K. J.

and Moehle

J. P.

2008. Dynamic collapse analysis for a reinforced concrete frame sustaining shear and axial failures, Earthquake Engineering and Structural Dynamics 37, 991–1012.

Elwood

K. J.

and Moehle

J. P.

2005a. Drift capacity of reinforced concrete columns with light transverse reinforcement, Earthquake Spectra 21, 71–89.

10.

Elwood

K. J.

and Moehle

J. P.

2005b. Axial capacity model for shear-damaged columns, ACI Structural Journal 102, 578–587.

11.

Galanis

P. H.

and Moehle

J. P.

2012. Development of collapse indicators for older-type reinforced concrete buildings, 15^th World Conference on Earthquake Engineering, Lisbon.

12.

Galanis

P. H.

and Moehle

J. P

2014. Development of Collapse Indicators for Risk Assessment of Older-Type Reinforced Concrete Buildings, UCB/SEMM-2014/03 Report, University of California, Berkeley, available at http://nisee.berkeley.edu/elibrary/Text/201404037.

13.

Haselton

C. B.

Liel

A. B.

Lange

and Deierlein

G. G.

2007. Beam-Column Element Model Calibrated for Predicting Flexure Response Leading to Global Collapse of RC frame Buildings, PEER Report 2007/03, Pacific Earthquake Engineering Research Center, University of California, Berkeley.

14.

Haselton

C. B.

Liel

A. B.

Deierlein

G. G.

Dean

B. S.

and Chou

J. H.

2011. Seismic collapse safety of reinforced concrete buildings, II: Assessment of ductile moment frames, Journal of Structural Engineering 137, 481–491.

15.

Ibarra

L. F.

Medina

R. A.

and Krawinkler

2005. Hysteretic models that incorporate strength and stiffness deterioration, Earthquake Engineering and Structural Dynamics 34, 1489–1511.

16.

Kuntz

G. L.

and Browning

2003. Reduction of column yielding during earthquakes for reinforced concrete frames, ACI Structural Journal 100, 573–580.

17.

Liel

A. B.

Haselton

C. B.

and Deierlein

G. G.

2011. Seismic collapse safety of reinforced concrete buildings, II: Comparative assessment of nonductile and ductile moment frames, Journal of Structural Engineering 137, 492–502.

18.

NEHRP Consultants Joint Venture, 2010. Program Plan for the Development of Collapse Assessment and Mitigation Strategies for Existing Reinforced Concrete Buildings, National Institue of Standards and Technology, Washington, D.C.

19.

Uniform Building Code (UBC), 1976. Uniform Building Code, International Council of Building Officials, Whittier, CA.

20.

Vamvatsikos

and Cornell

C. A.

2004. Applied incremental dynamic analysis, Earthquake Spectra 20, 523–553.

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