English: Schematic explanation of failure of Sleipner A Oil Platform, Norway 1991. The tricell of this $500 million, ??? tall, structure imploded under water head of 67 m, causing the platform to sink within 18 minutes (no fatalities). A government commission identified two factors causing failure: poor detailing of reinforcement, and poor finite element mesh. A separate investigation documented a third contributing factor: the size effect in the shear failure shown, which reduced the shear capacity by about 40%..
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