Structural global performance assessment versus individual element-oriented performance-based assessment

Ebrahim Fadaei, Hamzeh Shakib, Alireza Azarbakht

Research output: Contribution to journalArticle

Abstract

In this paper, three new performance indices are proposed which can be used in order to determine the global performance of a given structure. The ASCE41-13 standard and the FEMA350 guidelines are used as representatives of, respectively, an element-oriented and a system-oriented performance-based assessment algorithm. Two ten-storeyed special steel moment frames, consisting of a regular and an irregular structure, are designed and assessed using these two algorithms. The results show that the element-oriented assessment algorithm significantly underestimates the seismic demand and capacity, especially in the case of the immediate occupancy and collapse prevention limit states. This underestimation can cause a significant drop in the estimated confidence levels.

Keywords

  • ASCE41-13
  • confidence level
  • FEMA350
  • performance-based assessment

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