JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Influence of concurrent horizontal and vertical ground excitations on the collapse margins of non-ductile RC frame buildings
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Influence of concurrent horizontal and vertical ground excitations on the collapse margins of non-ductile RC frame buildings
Farsangi, E. Noroozinejad; Yang, T.Y.; Tasnimi, A.A.;
 Abstract
Recent earthquakes worldwide show that a significant portion of the earthquake shaking happens in the vertical direction. This phenomenon has raised significant interests to consider the vertical ground motion during the seismic design and assessment of the structures. Strong vertical ground motions can alter the axial forces in the columns, which might affect the shear capacity of reinforced concrete (RC) members. This is particularly important for non-ductile RC frames, which are very vulnerable to earthquake-induced collapse. This paper presents the detailed nonlinear dynamic analysis to quantify the collapse risk of non-ductile RC frame structures with varying heights. An array of non-ductile RC frame architype buildings located in Los Angeles, California were designed according to the 1967 uniform building code. The seismic responses of the architype buildings subjected to concurrent horizontal and vertical ground motions were analyzed. A comprehensive array of ground motions was selected from the PEER NGA-WEST2 and Iran Strong Motions Network database. Detailed nonlinear dynamic analyses were performed to quantify the collapse fragility curves and collapse margin ratios (CMRs) of the architype buildings. The results show that the vertical ground motions have significant impact on both the local and global responses of non-ductile RC moment frames. Hence, it is crucial to include the combined vertical and horizontal shaking during the seismic design and assessment of non-ductile RC moment frames.
 Keywords
non-ductile RC frame;collapse margin;fragility curves;vertical excitation;OpenSees;
 Language
English
 Cited by
 References
1.
Anagnos, T., Comerio, M.C., Goulet, C., Na, H., Steele, J. and Stewart, J.P. (2008), "Los Angeles inventory of non-ductile concrete buildings for analysis of seismic collapse risk hazards", Proc. 14th World Conf. Earthquake Eng., 12-17.

2.
Ancheta, T.D., Darragh, R.B., Stewart, J.P., Seyhan, E., Silva, W.J., Chiou, B.S.J., ... & Donahue, J.L. (2013), "PEER NGA-West2 Database", PEER Report, 3, 83.

3.
ASCE (2010), "Minimum design loads for buildings and other structures, ASCE Standard ASCE/SEI 7-10", American Society of Civil Engineers: Reston, Virginia.

4.
Bommer, J., Bray, J.D., Pitilakis, K. and Yasuda, S. (2005), Geotechnical, geological and earthquake engineering, Springer.

5.
Bozorgnia, Y. and Campbell, K.W. (2004), "The vertical-to-horizontal response spectral ratio and tentative procedures for developing simplified V/H and vertical design spectra", J. Earthq. Eng., 8, 175-207.

6.
Clyde, C., Pantelides, C.P. and Reaveley, L.D. (2000), "Performance-based evaluation of exterior reinforced concrete building joints for seismic excitation", PEER Report 2000/05, Pacific Earthquake Engineering Center, University of California, Berkeley, CA.

7.
Code, UBC (1967), Edition, Vol. I, In International Conference of Building Officials, Pasadena, California.

8.
Collier, C.J. and Elnashai, A.S. (2001), "A procedure for combining vertical and horizontal seismic action effects", J. Earthq. Eng., 5(4), 521-539. crossref(new window)

9.
Cornell, A., Zareian, F., Krawinkler, H. and Miranda, E. (2005), "Prediction of probability of collapse, van Nuys hotel building testbed report: exercising seismic performance assessment", Pacific Earthq. Eng. Res., 11, 85-93.

10.
Elwood, K.J. (2004), "Modelling failures in existing reinforced concrete columns", Can. J. Civil Eng., 31(5), 846-859. crossref(new window)

11.
Eskandari, R. and Vafaei, D. (2015), "Effects of near-fault records characteristics on seismic performance of eccentrically braced frame", Struct. Eng. Mech., 56(5), 855-870. crossref(new window)

12.
Galal, K. (2007), "Lateral force-displacement ductility relationship of non-ductile squat RC columns rehabilitated using FRP confinement", Struct. Eng. Mech., 25(1), 75-89. crossref(new window)

13.
Hakuto, S., Park, R. and Tanaka, H. (2000), "Seismic load tests on interior and exterior beam-column joints with substandard reinforcing details", ACI Struct. J., 97(1), 11-25.

14.
Haselton, C., Liel, A., Taylor Lange, S. and Deierlein, G.G. (2008), "Beam-Column element model calibrated for predicting flexural response leading to global collapse of RC frame buildings", PEER Rep. 2007/03, Pacific Earthquake Engineering Research Center (PEER), Univ. of California at Berkeley, Berkeley, CA.

15.
Ibarra, L.F., Medina, R.A. and Krawinkler, H. (2005), "Hysteretic models that incorporate strength and stiffness deterioration", Earthq. Eng. Struct. Dyn., 34(11), 1489-1511. crossref(new window)

16.
Iranian Building and Housing Research Center website, www.bhrc.ac.ir

17.
Liel, A.B. and Deierlein, G.G. (2008), "Assessing the collapse risk of California's existing reinforced concrete frame structures: metrics for seismic safety decisions", Blume Earthquake Engineering Center, No. 166, Stanford University.

18.
Liel, A.B., Haselton, C.B. and Deierlein, G.G. (2011), "Seismic collapse safety of reinforced concrete buildings: ii. comparative assessment of non-ductile and ductile moment frames", J. Struct. Eng., 137(4), 492-502. crossref(new window)

19.
McKenna, F. (2014), "Open system for earthquake engineering simulation (OpenSees)", Version 2.4. 4 MP.

20.
Papazoglou, A.J. and Elnashai, A.S. (1996), "Analytical and field evidence of the damaging effect of vertical earthquake ground motion", Earthq. Eng. Struct. Dyn., 25, 1109-1137. crossref(new window)

21.
Prager, F., Tucker, J. and Sneberger, L.P. (2009), "The policy problem of non-ductile concrete buildings in Los Angeles: Costly earthquakes, uncertain owners", ASCE/SEI Conference on Improving the Seismic Performance of Existing Buildings and Others Structures.

22.
Priestley, M.J.N., Benzoti, G., Ohtaki, T. and Seible, F. (1996), "Seismic performance of circular reinforced concrete columns under varying axial load", Report-SSRP-96/04, Division of Structural Engineering, University of California, San Diego, CA.

23.
United States Geological Survey website, www.usgs.gov

24.
Wen, Y.K., Ellingwood, B.R. and Bracci, J.M. (2004), "Vulnerability functions", Technical Rep., DS-4, Mid-America Earthquake Center, Univ. of Illinois at Urbana-Champaign.

25.
Zhang, B., Yang, Y., Wei, Y.F., Liu, R.Y., Ding, C. and Zhang, K.Q. (2015), "Experimental study on seismic behavior of reinforced concrete column retrofitted with prestressed steel strips", Struct. Eng. Mech., 55(6), 1139-1155. crossref(new window)