Influence of modeling parameters on the response of degrading systems to near-field ground motions

The influence of modeling assumptions on the seismic response of structures subjected to near-field ground motions is investigated. Emphasis is given on degrading systems, since real-world structures do not have infinite displacement capacity as many inelastic models assume, while such systems are able to explicitly take into consideration the effect of stiffness and strength degradation. Near-field ground motions are of particular interest, since, compared to far-field records, may cause increased demand caused by the velocity pulse in their fault-normal component. Single-degree-of-freedom (SDOF) oscillators with generic multilinear force–deformation backbones are first considered in order to derive general conclusions for a wide range of periods. The effect of every parameter that describes the backbone is studied separately in order to identify the sensitivity of the demand when the system is subjected to pulse-like ground motions. Moreover, a nine-story steel moment resisting frame is studied in order to show that the observations made on SDOF structures extend to multi-degree-of-freedom buildings.

[1]  N. Abrahamson,et al.  Modification of Empirical Strong Ground Motion Attenuation Relations to Include the Amplitude and Duration Effects of Rupture Directivity , 1997 .

[2]  A. Papageorgiou,et al.  Quantification of ground-motion parameters and response spectra in the near-fault region , 2011 .

[3]  Helmut Krawinkler,et al.  Deterioration Modeling of Steel Components in Support of Collapse Prediction of Steel Moment Frames under Earthquake Loading , 2011 .

[4]  Craig D. Comartin,et al.  Applicability of Nonlinear Multiple-Degree-of-Freedom Modeling for Design | NIST , 2010 .

[5]  Yuji Ishiyama,et al.  LATERAL STIFFNESS - STRENGTH DISTRIBUTION AND DAMAGE CONCENTRATION ALONG THE HEIGHT OF A BUILDING , 1995 .

[6]  W. J. Hall,et al.  Earthquake spectra and design , 1982 .

[7]  H. Krawinkler,et al.  Effects of Near-Fault Ground Motions on Frame Structures , 2001 .

[8]  L. Ibarra.  Global collapse of frame structures under seismic excitations , 2003 .

[9]  Babak Alavi-Shushtari,et al.  Effects of Near-Fault Ground Motions on Frame Structures , 2000 .

[10]  Nikolaos V. Zaras.  Case Study – Greece , 2012, Biopreparedness and Public Health.

[11]  Dimitrios Vamvatsikos,et al.  Fast performance uncertainty estimation via pushover and approximate IDA , 2009 .

[12]  Marvin W. Halling,et al.  Near-Source Ground Motion and its Effects on Flexible Buildings , 1995 .

[13]  P. Somerville.  Magnitude scaling of the near fault rupture directivity pulse , 2003 .

[14]  Constantine C. Spyrakos,et al.  Evaluation of near-source seismic records based on damage potential parameters: Case study: Greece , 2008 .

[15]  A. Chopra,et al.  Inelastic Deformation Ratios for Design and Evaluation of Structures: Single-Degree-of- Freedom Bilinear Systems , 2004 .

[16]  Jack W. Baker,et al.  VECTOR-VALUED INTENSITY MEASURES FOR PULSE-LIKE NEAR-FAULT GROUND MOTIONS , 2008 .

[17]  S. Mahin,et al.  Aseismic design implications of near‐fault san fernando earthquake records , 1978 .

[18]  Jorge Ruiz-García,et al.  Inelastic Displacement Ratios for Seismic Assessment of Structures Subjected to Forward-Directivity Near-Fault Ground Motions , 2011 .

[19]  Eduardo Miranda,et al.  AMPLIFICATION FACTORS TO ESTIMATE INELASTIC DISPLACEMENT DEMANDS FOR THE DESIGN OF STRUCTURES IN THE NEAR FIELD , 2000 .

[20]  N. Null.  Seismic Rehabilitation of Existing Buildings , 2007 .

[21]  Luis Ibarra,et al.  Hysteretic models that incorporate strength and stiffness deterioration , 2005 .

[22]  Jack W. Baker,et al.  Quantitative Classification of Near-Fault Ground Motions Using Wavelet Analysis , 2007 .

[23]  A. Papageorgiou,et al.  Near‐fault ground motions, and the response of elastic and inelastic single‐degree‐of‐freedom (SDOF) systems , 2004 .

[24]  Iunio Iervolino,et al.  Inelastic displacement ratio of near‐source pulse‐like ground motions , 2012 .