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![Cylindrical panel with outward dent](thumbnails/s256.jpg) |
![Porcupine quill trimmed for testing under axial compression](thumbnails/s257.jpg) |
![Structurally, the porcupine quill is a foam-filled cylindrical shell](thumbnails/s258.jpg) |
![Locally post-buckled, axially compressed porcupine quill, showing several delaminations of the wall](thumbnails/s259.jpg) |
![Axially compressed short concrete-filled elliptical steel tube](thumbnails/s260.jpg) |
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Cylindrical panel with outward dent |
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Porcupine quill trimmed for testing under axial compression |
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Structurally, the porcupine quill is a foam-filled cylindrical shell |
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Locally post-buckled, axially compressed porcupine quill, showing several delaminations of the wall |
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Axially compressed short concrete-filled elliptical steel tube |
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![Finite element model of concrete-filled axially compressed elliptical tube](thumbnails/s261.jpg) |
![Some of the concrete-filled elliptical tube specimens after testing under axial compression](thumbnails/s262.jpg) |
![Axial load/stress curves for 4 of the axially compressed concrete-filled steel tubes](thumbnails/s263.jpg) |
![Concrete filled axially compressed steel tubular stub column cross sections](thumbnails/s264.jpg) |
![Locally buckled specimens of the types shown in the previous image](thumbnails/s265.jpg) |
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Finite element model of concrete-filled axially compressed elliptical tube |
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Some of the concrete-filled elliptical tube specimens after testing under axial compression |
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Axial load/stress curves for 4 of the axially compressed concrete-filled steel tubes |
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Concrete filled axially compressed steel tubular stub column cross sections |
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Locally buckled specimens of the types shown in the previous image |
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![Tapered Concrete Filled Steel Tubes (CFST) colunns used in structures](thumbnails/s266.jpg) |
![Buckling of concrete filled and hollow tapered steel tube columns](thumbnails/s267.jpg) |
![A lattice vault roof that can buckle](thumbnails/s268.jpg) |
![Nonlinear static response from two models: 1. continuum shell and 2. lattice finite elements](thumbnails/s269.jpg) |
![Elastic-plastic thick cylindrical shell under bending: Moment-curvature curves for R/t=10](thumbnails/s270.jpg) |
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Tapered Concrete Filled Steel Tubes (CFST) colunns used in structures |
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Buckling of concrete filled and hollow tapered steel tube columns |
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A lattice vault roof that can buckle |
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Nonlinear static response from two models: 1. continuum shell and 2. lattice finite elements |
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Elastic-plastic thick cylindrical shell under bending: Moment-curvature curves for R/t=10 |
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