Vulnerability assessment of seismic retrofit measures for frame and wall pre-code buildings

Aman Mwafy, Anas Issa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The number of existing buildings that may be at risk because of insufficient seismic design provisions cannot be underestimated. Recent studies have confirmed the pressing need for the seismic retrofit of pre-code structures to reduce their probability of collapse. A number of retrofit approaches are therefore assessed in this study, namely reinforced concrete jacketing, fiber reinforced polymers wrapping, and installing externally unbonded steel plates. Detailed structural design and fiber-based modeling are carried out for five reference structures representing frame and shear wall multi-story buildings before and after retrofit. Forty earthquake records are selected to represent potential earthquake scenarios in a region of medium seismicity that was selected as a reference study area. A large number of inelastic pushover and dynamic analyses are performed to assess the lateral capacity and to derive a wide range of fragility relationships for the reference structures. The highest positive impact of retrofit is observed on the pre-code flat slab-column systems. The reductions in the vulnerability of the retrofitted structures confirmed the effectiveness of the selected techniques for mitigating the earthquake losses of pre-code building inventory.

Original languageEnglish
Title of host publicationISEC 2015 - 8th International Structural Engineering and Construction Conference
Subtitle of host publicationImplementing Innovative Ideas in Structural Engineering and Project Management
EditorsSwapan Saha, Yixia X. Zhang, S. Yazdani, Amarjit Singh
PublisherISEC Press
Pages449-454
Number of pages6
ISBN (Electronic)9780996043717
DOIs
Publication statusPublished - 2015
Event8th International Structural Engineering and Construction Conference: Implementing Innovative Ideas in Structural Engineering and Project Management, ISEC 2015 - Sydney, Australia
Duration: Nov 23 2015Nov 28 2015

Publication series

NameISEC 2015 - 8th International Structural Engineering and Construction Conference: Implementing Innovative Ideas in Structural Engineering and Project Management

Other

Other8th International Structural Engineering and Construction Conference: Implementing Innovative Ideas in Structural Engineering and Project Management, ISEC 2015
Country/TerritoryAustralia
CitySydney
Period11/23/1511/28/15

Keywords

  • Dynamic collapse analysis
  • Fragility
  • Mitigation techniques
  • Pushover analysis
  • Response upgrade
  • Substandard structures

ASJC Scopus subject areas

  • Building and Construction
  • Civil and Structural Engineering

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