Effects of Far- and Near-Field Multiple Earthquakes on the RC SDOF Fragility Curves Using Different First Shock Scaling Methods

Authors

Civil Engineering Department, Urmia University, Urmia, Iran

Abstract

Typically, to study the effects of consecutive earthquakes, it is necessary to consider definite intensity levels of the first shock. Methods commonly used to define intensity involve scaling the first shock to a specified maximum interstorey drift. In this study the structure’s predefined elastic spectral acceleration caused by the first shock is also considered for scaling. This study aims to investigate the effects of consecutive far-field (FF) and near-field (NF) ground motions on the exceedance probability of different performance levels of a reinforced concrete single degree of freedom system considering the aforementioned first shock scaling methods. Eight groups of simulations are defined with each considering a combination of FF and NF ground motions. By using elastic spectral acceleration as the scaling method, it is found that the exceedance probability of the second shock performance levels, especially in pulse-like records, greatly depends on the order of far/near field ground motions and the level of damage caused by the first shock. It could be inferred that although first shock scaling method to maximum drift ratio is the commonly used method, the effects of record type multiple earthquakes are more revealed using elastic spectral acceleration as the first shock scaling criteria.

Keywords


  1. Amadio, C., Fragiacomo, M. and Rajgelj, S., “The effects of repeated earthquake ground motions on the non-linear response of SDOF systems”, Journal of Earthquake Engineering and Structural Dynamics, Vol. 32, (2003), 291–308.
  2. Hatzigeorgiou, G.D., “Behavior factors for nonlinear structures subjected to multiple near-fault earthquakes”, Journal of Computers & Structures, Vol. 88, No. 5–6, (2010), 309-321.
  3. Hatzigeorgiou, G.D., Liolios, A. A., “Nonlinear behaviour of RC frames under repeated strong ground motions”, Journal of Soil Dynamics and Earthquake Engineering, Vol. 30, No. 10, (2010), 1010-1025.
  4. Hatzigeorgiou, G.D., Beskos, D. E., “Inelastic displacement ratios for SDOF structures subjected to repeated earthquakes”, Journal of Engineering Structures, Vol. 31, No. 11, (2009), 2744-2755.
  5. Hatzigeorgiou, G.D., Papagiannopoulos, G. A., Beskos, D. E., “Evaluation of maximum seismic displacements of SDOF systems from their residual deformation”, Journal of Engineering Structures, Vol. 33, No. 12, (2011), 3422-3431.
  6. Di Sarno, L., “Effects of multiple earthquakes on inelastic structural response”, Journal of Engineering Structures, Vol. 56, (2013), 673-681.
  7. Goda, K. and Taylor, C. A., “Effects of aftershocks on peak ductility demand due to strong ground motion records from shallow crustal earthquakes”, Journal of Earthquake Engineering and Structural Dynamics, Vol. 41, (2012), 2311–2330.
  8. Abdelnaby A E., “Multiple Earthquake Effects On Degrading Reinforced Concrete Structures”, PhD Thesis, University Of Illinois At Urbana-Champaign, (2012).
  9. Abdelnaby, A. and Elnashai, A., “Performance of Degrading Reinforced Concrete Frame Systems under the Tohoku and Christchurch Earthquake Sequences”, Journal of Earthquake Engineering, (2014), Vol. 18, No. 7, 1009-1036.
  10. Hosseinpour, F., Abdelnaby, A.E., “Effect of different aspects of multiple earthquakes on the nonlinear behavior of RC structures”, Journal of Soil Dynamics and Earthquake Engineering, Vol. 92, (2017), 706-725.
  11. Behnamfar F., Fathollahi A., “Soft Soil Seismic Design Spectra Including Soil-structure Interaction”, International Journal of Engineering (IJE) Transactions A: Basics, Vol. 30, No. 10, (2017), 1443-1450.
  12. Foti D., “Local ground effects in near-field and far-field areas on seismically protected buildings”,  Journal of Soil Dynamics and Earthquake Engineering, Vol. 74, (2015), 14–24.
  13. Jäger C. And Adam C., “Influence of Collapse Definition and Near-Field Effects on Collapse Capacity Spectra”, Journal of Earthquake Engineering, Vol. 17, (2013), 859–878.
  14. Yaghmaei-Sabegh, S., Mohammad-Alizadeh, H., “Improvement Of Iranian Seismic Design Code Considering The Near-Fault Effects”, International Journal of Engineering (IJE) Transactions C: Aspects Vol. 25, No. 2, (2012) 147-158.
  15. Yaghmaei-Sabegh, S., “A Wavelet-Based Procedure For Mining Of Pulse-Like Ground Motions Features On Response Spectra”, International Journal of Engineering (IJE) Transactions B: Applications Vol. 25, No. 1, (2012), 39-50.
  16. Hatzigeorgiou, G. D., “Ductility demand spectra for multiple near- and far-fault earthquakes”, Journal of Soil Dynamics and Earthquake Engineering, Vol. 30, No. 4, (2010), 170-183.
  17. Yue L., Song R., Van De Lindt J. W., “Collapse Fragility of Steel Structures Subjected to Earthquake Mainshock-Aftersshock Sequences”, Journal of Structural Engineering, Vol. 140, No. 12, (2014), 4014095.
  18. Ruiz-García, J., Negrete-Manriquez, J. C., “Evaluation of drift demands in existing steel frames under as-recorded far-field and near-fault mainshock–aftershock seismic sequences”, Journal of Engineering Structures, Vol. 33, No. 2, (2011), 621-634.
  19. Raghunandan M, Liel AB, Ryu H, Luco N., “Aftershock fragility curves and tagging assessments for a mainshock-damaged building”, Proceedings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal, (2012).
  20. Luco, N., Gerstenberger, M. C., Uma, SR., Ryu, H., Liel, A. B, Raghunandan, M., “A methodology for post-mainshock probabilistic assessment of building collapse risk”, Proceedings of the Ninth Pacific Conference on Earthquake Engineering: Building an Earthquake-Resilient Society, New Zealand, (2011).
  21. Raghunandan M., Liel A. B., Luco N. “Aftershock collapse vulnerability assessment of reinforced concrete frame structures”, Journal of Earthquake Engineering and Structural Dynamics, Vol. 44, (2015), 419–439.
  22. Jalilkhani M. And Manafpour A. R., “ Simplified Modal Pushover Analysis-Based Method For Incremental Dynamic Analysis of Regular RC Moment-Resisting Frames”, International Journal of Engineering (IJE) Transactions B: Applications, Vol. 31, No. 2 (2018) 196-203.
  23. Vamvatsikos, D. and Cornell, C. A., “Incremental dynamic analysis”, Journal of Earthquake Engineering and Structural Dynamics, Vol. 31, (2002), 491–514.
  24. Menasria, Y., Nouaouriaa, M. S., Brahimi, M., “Probabilistic Approach to The Seismic Vulnerability Of RC Frame Structures By The Development Of Analytical Fragility Curves”, International Journal of Engineering (IJE) Transactions A: Basics Vol. 30, No. 7, (2017), 945-954.
  25. Miranda, E. “Evaluation of site-dependent inelastic seismic design spectra,” Journal of Structural Engineering (ASCE), Vol. 119, No. 5, (1993), 1319–1338.
  26. Vidic, T. Fajfar, P., and Fischinger, M. “Consistent inelastic design spectra: Strength and displacement,” Earthquake Engineering and Structural Dynamics, Vol. 23, No. 5, (1994), 507-521.
  27. Shome, N., and Cornell, A. C.. “Normalization and scaling accelerograms for nonlinear structural analysis,” Prof. of the 6th U.S. National Conference on Earthquake Engineering, Seattle, WA, (1998).
  28. Shome, N., Cornell, C. A., Bazzurro, P., and Carballo, J. E. “Earthquakes, records, and nonlinear responses”, Earthquake Spectra, Vol. 14, No.3, (1998), 469–500.
  29. Li, Y., Song, R., Van De Lindt, J. “Collapse fragility of steel structures subjected to earthquake mainshock-aftershock sequences,” Journal of Structural Engineering, Vol. 140, No. 2, (2014), 04014095.
  30. Saatcioglu, M., Grira, M., “Confinement of reinforced concrete columns with welded reinforcement grids”, ACI Structural Journal, Vol. 96, (1999), 29-39.
  31. Mazzoni, S., McKenna, F., Scott, MH., Fenves, GL.,” The Open System for Earthquake Engineering Simulation (OpenSEES) User Command-Language Manual”,  Pacific Earthquake Engineering Research (PEER) , (2006).
  32. Lignos, D.G., Krawinkler, H., “Sidesway collapse of deteriorating structural systems under seismic excitations”, The John A. Blume Earthquake Engineering Research Center, Rep. No.TB 177, Stanford University, Stanford, CA, (2012).
  33. FEMA P695. “Quantification of Building Seismic Performance Factors”, Applied Technology Council (ATC) U.S.A: Federal Emergency Management Agency, (2009).
  34. PEER., Next Generation Attenuation Database, Pacific Earthquake Engineering Research Center, (2006), http://peer.berkeley.edu/nga/index.html.