collapse of 4 storied building in begunbari--- col… · the reasons behind the collapse of the...
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Collapse of 4 storied building in Begunbari‐‐‐A pictorial case study
Md. Nurul Alam
Project Coordinator/Structural Engineer,Project Coordinator/Structural Engineer,
ADPC
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OverviewOverview
• Date: June 01 2010Date: June 01, 2010
• Time: 11 PM Local time
i 8/ ddh b i Offi• Location: 18/B, Moddho Begunbari Post Office
• Type of Building collapsed: RCC ( LC‐Non‐Engineered), 4 storied
• Construction year of the building : 1999y g
• Casualty: 19 died as on June 02, 2010, number of casualty may increaseof casualty may increase
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Paper Clippings of June 02, 2010Paper Clippings of June 02, 2010
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LC building collapsed on a tin‐shed b ldbuilding
Tin Shed
LC Building
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Missing of Sufficient Ties in columnsMissing of Sufficient Ties in columns
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Narrow Access route made the k d ff lresponse work difficult
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The Structure was built on a recently f ll d l dfilled land
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(Ground Floor)Soft Storey Effect!
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Bad Choice of Construction materialsBad Choice of Construction materials
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Brittle failureBrittle failure
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Bad connection to the groundBad connection to the ground
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Short Column EffectShort Column Effect
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RemarksRemarks
The reasons behind the collapse of the buildingThe reasons behind the collapse of the building may be listed as follows:
• Improper site selection even the land was filled with garbageImproper site selection, even the land was filled with garbage instead of soil.
• Some heavy construction material were stored in the top floor of the building, which might lead the collapse.
• Low stiffness of the ground floor ( GF soft) might lead to the collapsecollapse.
• Foundation was not designed properly and the connection between the column and the base was not adequate.
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FSCD, Police, AFD, BDRCS, Ansar, community volunteers all were involved in the S&R operations , but still the collapsed building p , p g
could not be removed.
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It is not a special case in the area. Still there are so l bl t t i th ti l l !many vulnerable structures in the particular place!