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Seismic Fragility Assessment of Reinforced Concrete High-Rise Buildings Using the Uncoupled Modal Response History Analysis (UMRHA)

  • Muhammad Zain
  • Naveed AnwarEmail author
  • Fawad Ahmed Najam
  • Tahir Mehmood
Conference paper
Part of the Geotechnical, Geological and Earthquake Engineering book series (GGEE, volume 47)

Abstract

In this study, a simplified approach for the analytical development of fragility curves of high-rise RC buildings is presented. It is based on an approximate modal decomposition procedure known as the Uncoupled Modal Response History Analysis (UMRHA). Using an example of a 55-story case study building, the fragility relationships are developed using the presented approach. Fifteen earthquake ground motions (categorized into 3 groups corresponding to combinations of small or large magnitude and source-to-site distances) are considered for this example. These ground motion histories are scaled for 3 intensity measures (peak ground acceleration, spectral acceleration at 0.2 s and spectral acceleration at 1 s) varying from 0.25 to 2 g. The presented approach resulted in a significant reduction of computational time compared to the detailed Nonlinear Response History Analysis (NLRHA) procedure, and can be applied to assess the seismic vulnerability of complex-natured, higher mode-dominating tall reinforced concrete buildings.

Keywords

Seismic risk assessment UMRHA NLRHA Fragility relationships High-rise RC buildings 

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  • Muhammad Zain
    • 1
  • Naveed Anwar
    • 2
    Email author
  • Fawad Ahmed Najam
    • 1
  • Tahir Mehmood
    • 3
  1. 1.NUST Institute of Civil Engineering (NICE)National University of Sciences and Technology (NUST)IslamabadPakistan
  2. 2.Asian Institute of Technology (AIT)BangkokThailand
  3. 3.COMSATS Institute of Information Technology (CIIT)Wah CanttPakistan

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