Loading...

Investigation of the Damage Imposed on Steel Structures under Near Field Earthquakes from a Performance Based Design Viewpoint

Imani, Reza | 2010

840 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40669 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Rahimzadeh Rofooei, Fayaz
  7. Abstract:
  8. The considerable structural damage caused by near field earthquakes has revealed the need for further research on their characteristics and their corresponding effects on structures. The short-duration, high- energy pulses present in these types of earthquakes impose high demands on the structures compared to far field ground motions. Thus, more research is needed to improve the current design methods, especially from a performance based point of view for the structures close to faults. This study is about damage assessment of steel moment resisting frame structures under near-field ground motions from a performance based design point of view. A number of 3 and 9-story, 3-D structural model being designed using the strength method, are considered. A set of near-field earthquake records, scaled according to ASCE-7(05), are used for nonlinear dynamic time history analyses. Park and Ang damage index is considered for quantitative measurement of the performance of structural models. Maximum values of inter-story drifts along with the local and global damage indices are determined to be used in the performance assessment process. Considering the average results of different scaled ground motions, it is observed that nearly all the structural models cross the limit of repairable damage for the 10/50 hazard level meaning that the repair costs would be nearly more than total replacement costs and many of them were close to collapse under MCE level ground motions. The amount of damage is considerably higher compared to the results of analysis under far-field earthquakes.


  9. Keywords:
  10. Nonlinear Analysis ; Steel Moment Resistant Frame ; Near-Field Earthquake ; Performance Based Design ; Performance Levels ; Damage Assessment

 Digital Object List

 Bookmark