Abstract
Recent studies regarding progressive collapse resistance of buildings considered only single critical column removal scenario. However, limited investigations have been conducted so far to assess multi-column removal scenarios. Hence this study is made to compare progressive collapse resistance of a multi-story building under both single and multi-column removal scenarios. An eight-storey reinforced concrete building was analyzed by using linear static analysis procedure and DCR values of the members are calculated to investigate the potential of progressive collapse as per GSA guideline. The values of DCR are compared for different cases. Comparisons of single and multi-column removal scenarios reveal that later scenarios are more critical because of their higher demand capacity ratios, and it is more critical when both corner and exterior columns are removed.
Highlights
Structural safety has always been a key preoccupation for the design of civil engineering projects
The member is considered as failed if the Demand capacity ratio (DCR) value of a member exceeds the criteria for acceptance as per G. S. A. (GSA) guidelines
The demand moment table obtained by SAP2000 software for loadings assigned as per GSA is exported and their demand capacity ratios are calculated for the 2 frames intersecting on the removed column
Summary
Structural safety has always been a key preoccupation for the design of civil engineering projects. Once a column is made weak or removed, due to man-made or natural hazards, load carried by removed column is transferred to neighbouring columns in the structure and the collapsing system continually seeks alternative load paths in order to survive and if redistributed load exceeds member capacity it fails [3]. Number of other progressive collapses around the world took place like the collapse of Skyline Plaza in Virginia, the Civic Arena roof in Hartford, the Murrah Federal Building in Oklahoma City, WTC Towers in New York [4] Those collapses generated considerable concern over the adequacy of existing building codes, so more and more researchers have started to refocus on the causes of progressive collapse in building structures, seeking the establishment of rational methods for the assessment and enhancement of structural robustness under extreme accidental events [5].
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call