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 Combined lower and upper bound plastic analysis: better than the sum of its parts International Bridge Forum September 2009 Andrew Jackson / Dr Campbell Middle ton

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  • Combined lower and upper bound plastic analysis:better than the sum of its partsInternational Bridge Forum

    September 2009

    Andrew Jackson / Dr Campbell Middleton

  • Bridge Slab

  • Model test

    Bridge Slab: Load Test

    Collapse load

  • Elastic grillage analysis

    Bridge Slab: Elastic Analysis

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  • Bridge Slab: Yield Line Analysis

    Plastic upper bound analysis

    HogSag

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  • mx

    my

    mxy

    Plastic lower bound analysis

    Bridge Slab: Lower Bound Analysis

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  • Combined lower and upper bound plastic analysis

    Bridge Slab: Independent Lower and Upper Bound Plastic Analysis

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  • Tyne Tunnel: Lower Bound Analysis

  • Tyne Tunnel: Upper Bound Analysis

    Results agree to within 1%

    Combined lower and upper bound plastic analysis: better than the sum of its partsBridge SlabBridge Slab: Load TestBridge Slab: Elastic AnalysisBridge Slab: Yield Line AnalysisBridge Slab: Lower Bound AnalysisBridge Slab:Slide 8Slide 9