Application of damage spectra as seismic intensity measures in endurance time method for steel moment-resisting frames

Authors

Department of Civil Engineering, Sharif University of Technology (SUT), Tehran, P.O. Box 11155-9313, Iran

Abstract

In seismic resistant design of moment frames, the structure behavior under earthquakes has to be examined, considering various damage criteria. Damage indices can be estimated by using endurance time (ET) method with minimum computational effort. The quality of this estimation can be improved in different ways. In this paper, the graphs of a certain damage index versus natural period of the structure, called damage spectra, are produced applying intensifying ET records and scaled ground motions (GM). Then the excitation duration of ET acceleration functions (target time) is modified in order to reach acceptable consistency between ET and GM damage spectra. Moreover, various damage indices of a steel moment frame at two hazard levels are evaluated via nonlinear time-history analyses of the structure under scaled earthquakes and ET records. It is observed that the frame damage estimation can be improved by modifying the target time of ET records based on damage spectra; in addition, in most cases, there are negligible discrepancies between values of frame damage indices corresponding to ground motions and ET acceleration functions with the damage-based target time.

Keywords

References

References:
1. Krawinkler, H. and Zohrei, M. "Cumulative damage in steel structures subjected to earthquake ground motions", Computers and Structures, 16, pp. 531-541 (1983).
2. Powell, G.H. and Allahabadi, R. "Seismic damage prediction by deterministic methods: concepts and procedures", Earthquake Engineering and Structural Dynamics, 16, pp. 719-734 (1988).
3. Cosenza, E., Manfredi, G. and Ramasco, R. "The use of damage functionals in earthquake engineering: A comparison between different methods", Earthquake Engineering and Structural Dynamics, 22, pp. 855-868 (1993).
4. Park, Y.J., Ang, AH.S. and Wen, Y.K. "Damagelimiting a seismic design of buildings", Earthquake Spectra, 3(1), pp. 1-25 (1987).
5. Bozorgnia, Y. and Bertero, V.V. "Damage spectra: Characteristics and applications to seismic risk reduction", Journal of Structural Engineering, 129(10), pp. 1330-1340 (2003).
6. Ladjinovic, D. and Folic, R. "Application of improved damage index for designing of earthquake resistant structures", Thirteenth World Conference on Earthquake Engineering, Vancouver, B.C., Canada, Paper No. 2135 (2004).
7. Estekanchi, H.E. and Arjomandi, K. "Comparison of damage indices in nonlinear time history analysis of steel moment frames", Asian Journal of Civil Engineering, 8(6), pp. 629-646 (2007).
8. Arjomandi, K., Estekanchi, H.E. and Vafai, A. "Correlation between structural performance levels and damage indexes in steel frames subjected to earthquakes", Scientia Iranica, 16(2), pp. 147-155 (2009).
9. Datta, D. and Ghosh, S. "Uniform hazard spectra based on Park-Ang damage index", Journal of Earthquake and Tsunami, 2(3), pp. 241-258 (2008).
10. Bozorgnia, Y. and Bertero, V.V. "Damage spectrum and its applications to performance-based earthquake engineering", Thirteenth World Conference on Earthquake Engineering, Vancouver, B.C., Canada, Paper No. 1497 (2004).
11. Zhai, C.H., Wen, W.P., Chen, Z.Q., Li, S. and Xie, L.L. "Damage spectra for the mainshock-aftershock sequence-type ground motions", Soil Dynamics and Earthquake Engineering, 45, pp. 1-12 (2013).
12. Estekanchi, H.E., Arjomandi, K. and Vafai, A. "Estimating structural damage of steel moment frames by endurance time method", Journal of Constructional Steel Research, 64, pp. 145-155 (2008).
13. Estekanchi, H.E., Vafai, A. and Sadeghazar, M. "Endurance time method for seismic analysis and design of structures", Scientia Iranica, 11(4), pp. 361-370 (2004).
14. Estekanchi, H.E., Valamanesh, V. and Vafai, A. "Application of endurance time method in linear seismic analysis", Engineering Structures, 29, pp. 2551-2562 (2007).
15. Nozari, A. and Estekanchi, H.E. "Optimization of endurance time acceleration functions for seismic assessment of structures", International Journal of optimization in Civil Engineering, 2, pp. 257-277 (2011).
16. Valamanesh, V. and Estekanchi, H.E. "Nonlinear seismic assessment of steel moment frames under bidirectional loading via endurance time method", The Structural Design of Tall and Special Buildings (2012).DOI:10.1002/tal.1054.
17. Hariri-Ardebili, A.M., Zarringhalam, Y., Estekanchi, H.E. and Yahtai, M. "Nonlinear seismic assessment of steel moment frames using time-history, incremental dynamic, and endurance time analysis methods", Scientia Iranica, 20(3), pp. 431-444 (2012).
18. Mirzai, A., Estekanchi, H.E. and Vafai, A. "Application of endurance time method in performance based design of steel moment frames", Scientia Iranica, 17(6), pp. 482-492 (2010).
19. Mashayekhi, M. and Estekanchi, H.E. "significant of effective number of cycles in endurance time analysis", Asian Journal of Civil Engineering, 13(5), pp. 647-657 (2012).
20. ASCE/SEI7-10, Minimum Design Loads for Buildings and Other Structures, American Society of Civil Engineers and Structural Engineering Institute, Reston, Virginia (2010).
21. Estekanchi, H.E. "Website of the endurance time method", http://sharif.edu/ stkanchi/ET (2011).
22. FEMA-440, Improvement of Nonlinear Static Seismic Analysis Procedures, Federal Emergency Management Agency, Washington, DC (2005).
23. Ladjinovic, D., Radujkovic, A. and Raseta, A. "Seismic performance assessment based on damage of structures - Part 1: Theory", Architecture and Civil Engineering, 9(1), pp. 77-88 (2011).
24. FEMA-356, Prestandard and Commentary for the Seismic Rehabilitation of Buildings, Federal Emergency Management Agency, Washington, DC (2000).
25. FEMA-695, Quantification of Building Seismic Performance Factors, Federal Emergency Management Agency, Washington, DC (2009).
26. ANSI/AISC360-10, Specification for Structural Steel Buildings, American Institute of Steel Construction, Chicago, Illinois (2010).
27. Standard No. 2800-05, Iranian Code of Practice for Seismic Resistant Design of Buildings, Building and Housing research Center, Iran (2005).
28. OPENSEES "Open system for earthquake engineering simulation", Pacific Earthquake Engineering Research Center, Version 2.4.0 (2007).
29. Maleki-Amin, M.J. "Application of damage spectra in the estimation of steel moment frames damage by ET method", Thesis presented to the Faculty of the Department of Civil Engineering, Sharif University of Technology, partial Fulfillment of the Requirements for the Master of Science Degree, Tehran, Iran (2014).
Scientia Iranica
Volume 24, Issue 1 - Serial Number 1
Transactions on Civil Engineering (A)
January and February 2017
Pages 53-64

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History

  • Receive Date: 19 December 2014
  • Revise Date: 22 August 2022
  • Accept Date: 09 July 2017

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