Location

St. Louis, Missouri

Session Start Date

6-1-1993

Abstract

Investigation of collapse of a five storey residential building in Calcutta is described. The failure occurred soon after construction but, fortunately, before occupation. Detailed soil investigation revealed that a bowl-shaped depression, 5. 5 m deep, existed in the collapsed building area which was subsequently filled up. The foundation raft was placed 5.325 m below ground level and the subsequent filling put an overburden pressure of varying magnitude resulting in non-uniform pressure on the subsoil. This was apparently not considered in design. Factor of safety was found to be low against bearing capacity failure and the building tilted towards the heavier load concentration. This caused over-stressing, in structural elements which gradually failed and ultimately led to the collapse of the building.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Third Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1993

Document Version

Final Version

Rights

© 1993 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Jun 1st, 12:00 AM

Investigation of Collapse of an Apartment Building Due to Differential Filling

St. Louis, Missouri

Investigation of collapse of a five storey residential building in Calcutta is described. The failure occurred soon after construction but, fortunately, before occupation. Detailed soil investigation revealed that a bowl-shaped depression, 5. 5 m deep, existed in the collapsed building area which was subsequently filled up. The foundation raft was placed 5.325 m below ground level and the subsequent filling put an overburden pressure of varying magnitude resulting in non-uniform pressure on the subsoil. This was apparently not considered in design. Factor of safety was found to be low against bearing capacity failure and the building tilted towards the heavier load concentration. This caused over-stressing, in structural elements which gradually failed and ultimately led to the collapse of the building.