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Configuration Issues from the 23 October 2011, Van- Ercis , Turkey, M w =7.1 (USGS) eq. Soft ground story Split-level ground story Floor torsion Strong-beam weak-column Very flexible floor system: block infilled joist floor with very weak/flexible beams Captive columns Pounding.
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Configuration Issuesfrom the 23 October 2011, Van-Ercis, Turkey, Mw=7.1 (USGS) eq • Soft ground story • Split-level ground story • Floor torsion • Strong-beam weak-column • Very flexible floor system: block infilled joist floor with very weak/flexible beams • Captive columns • Pounding
Split-level Ground Story Elevator core RC wall seen from inside
Floor Torsion Column built as a Structural Wall Structural Wall in the back
Floor Torsion All columns at ground level and along the front and side of the building (away from the center of resistance) developed hinges at their bases.
Floor Torsion Structural Wall in the back (no damage) Column built as a Structural Wall
Very Flexible Floor System Column hinging at the base
Bayram Hotel in Van (main city)(collapsed during the M5.6 eq on 11/9/2011) Photo taken on Nov. 1, 2011
Bayram Hotel Photo taken on Nov. 10, 2011 source: milliyet.com.tr