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| Slender and rigid columns |
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| Rigidity and fire safety of columns in multi-storey buildings are enhanced by the insertion of steelor concrete cores, for example where shear connectors anchor a steel profile in a concrete casing. A steel pipe surrounding a concrete core holds the concrete in place and has the same effect as strong reinforcement of the concrete with steel bars |
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| Figure 11: End of a composite bridge | Figure 10: Various types of composite columns | ||||||||||||